- 03 Sep, 2009 1 commit
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Paul Mackerras authored
I had the codes for L1 D-cache load accesses and misses swapped around, and the wrong codes for LL-cache accesses and misses. This corrects them. Reported-by:
Corey Ashford <cjashfor@linux.vnet.ibm.com> Signed-off-by:
Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@kernel.org> LKML-Reference: <19103.8514.709300.585484@cargo.ozlabs.ibm.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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- 29 Aug, 2009 1 commit
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Peter Zijlstra authored
We have a race in the swcounter stuff where we can start counting a counter that has never been enabled, this leads to a /0 situation. The below avoids the /0 but doesn't close the race, this would need a new counter state. The race is due to perf_swcounter_is_counting() which cannot discern between disabled due to scheduled out, and disabled for any other reason. Such a crash has been seen by Ingo: [ 967.092372] divide error: 0000 [#1] SMP [ 967.096499] last sysfs file: /sys/devices/system/cpu/cpu15/cache/index2/shared_cpu_map [ 967.104846] CPU 5 [ 967.106965] Modules linked in: [ 967.110169] Pid: 3351, comm: hackbench Not tainted 2.6.31-rc8-tip-01158-gd940a54-dirty #1568 X8DTN [ 967.119456] RIP: 0010:[<ffffffff810c0aba>] [<ffffffff810c0aba>] perf_swcounter_ctx_event+0x127/0x1af [ 967.129137] RSP: 0018:ffff8801a95abd70 EFLAGS: 00010046 [ 967.134699] RAX: 0000000000000002 RBX: ffff8801bd645c00 RCX: 0000000000000002 [ 967.142162] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801bd645d40 [ 967.149584] RBP: ffff8801a95abdb0 R08: 0000000000000001 R09: ffff8801a95abe00 [ 967.157042] R10: 0000000000000037 R11: ffff8801aa1245f8 R12: ffff8801a95abe00 [ 967.164481] R13: ffff8801a95abe00 R14: ffff8801aa1c0e78 R15: 0000000000000001 [ 967.171953] FS: 0000000000000000(0000) GS:ffffc90000a00000(0063) knlGS:00000000f7f486c0 [ 967.180406] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b [ 967.186374] CR2: 000000004822c0ac CR3: 00000001b19a2000 CR4: 00000000000006e0 [ 967.193770] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 967.201224] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 967.208692] Process hackbench (pid: 3351, threadinfo ffff8801a95aa000, task ffff8801a96b0000) [ 967.217607] Stack: [ 967.219711] 0000000000000000 0000000000000037 0000000200000001 ffffc90000a1107c [ 967.227296] <0> ffff8801a95abe00 0000000000000001 0000000000000001 0000000000000037 [ 967.235333] <0> ffff8801a95abdf0 ffffffff810c0c20 0000000200a14f30 ffff8801a95abe40 [ 967.243532] Call Trace: [ 967.246103] [<ffffffff810c0c20>] do_perf_swcounter_event+0xde/0xec [ 967.252635] [<ffffffff810c0ca7>] perf_tpcounter_event+0x79/0x7b [ 967.258957] [<ffffffff81037f73>] ftrace_profile_sched_switch+0xc0/0xcb [ 967.265791] [<ffffffff8155f22d>] schedule+0x429/0x4c4 [ 967.271156] [<ffffffff8100c01e>] int_careful+0xd/0x14 Reported-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1251472247.17617.74.camel@laptop> Signed-off-by:
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- 28 Aug, 2009 2 commits
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Ingo Molnar authored
Per-cpu counters are an ASLR information leak as they show the execution other tasks do. Increase the paranoia level to 1, which disallows per-cpu counters. (they still allow counting/profiling of own tasks - and admin can profile everything.) Acked-by:
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Linus Torvalds authored
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- 27 Aug, 2009 33 commits
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James Bottomley authored
The root cause is a duplicate section name (.text); is this legal? [ Amerigo Wang: "AFAIK, yes." ] However, there's a problem with commit 6d760133 in that if you fail to allocate a mod->sect_attrs (in this case it's null because of the duplication), it still gets used without checking in add_notes_attrs() This should fix it [ This patch leaves other problems, particularly the sections directory, but recent parisc toolchains seem to produce these modules and this prevents a crash and is a minimal change -- RR ] Signed-off-by:
James Bottomley <James.Bottomley@suse.de> Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Tested-by:
Helge Deller <deller@gmx.de> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Rusty Russell authored
The rarely-used symbol_put_addr() needs to use dereference_function_descriptor on powerpc. Reported-by:
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Jeremy Fitzhardinge authored
As soon as the framebuffer is registered, our methods may be called by the kernel. This leads to a crash as xenfb_refresh() gets called before we have the irq. Connect to the backend before registering our framebuffer with the kernel. [ Fixes bug http://bugzilla.kernel.org/show_bug.cgi?id=14059 ] Signed-off-by:
Michal Schmidt <mschmidt@redhat.com> Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by:
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git://git.infradead.org/users/eparis/notifyLinus Torvalds authored
* 'for-linus' of git://git.infradead.org/users/eparis/notify: inotify: Ensure we alwasy write the terminating NULL. inotify: fix locking around inotify watching in the idr inotify: do not BUG on idr entries at inotify destruction inotify: seperate new watch creation updating existing watches
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Benjamin Herrenschmidt authored
We call lmb_end_of_DRAM() to test whether a DMA mask is ok on a machine without IOMMU, but this function is marked as __init. I don't think there's a clean way to get the top of RAM max_pfn doesn't appear to include highmem or I missed (or we have a bug :-) so for now, let's just avoid having a broken 2.6.31 by making this function non-__init and we can revisit later. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fsLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: update documentation pointers 9p: remove unnecessary v9fses->options which duplicates the mount string net/9p: insulate the client against an invalid error code sent by a 9p server 9p: Add missing cast for the error return value in v9fs_get_inode 9p: Remove redundant inode uid/gid assignment 9p: Fix possible regressions when ->get_sb fails. 9p: Fix v9fs show_options 9p: Fix possible memleak in v9fs_inode_from fid. 9p: minor comment fixes 9p: Fix possible inode leak in v9fs_get_inode. 9p: Check for error in return value of v9fs_fid_add
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Julien TINNES authored
Add a check in ip_append_data() for NULL *rtp to prevent future bugs in callers from being exploitable. Signed-off-by:
Julien Tinnes <julien@cr0.org> Signed-off-by:
Tavis Ormandy <taviso@sdf.lonestar.org> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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David Howells authored
kAFS crashes when asked to read a symbolic link because page_getlink() passes a NULL file pointer to read_mapping_page(), but afs_readpage() expects a file pointer from which to extract a key. Modify afs_readpage() to request the appropriate key from the calling process's keyrings if a file struct is not supplied with one attached. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Eric W. Biederman authored
Before the rewrite copy_event_to_user always wrote a terqminating '\0' byte to user space after the filename. Since the rewrite that terminating byte was skipped if your filename is exactly a multiple of event_size. Ouch! So add one byte to name_size before we round up and use clear_user to set userspace to zero like /dev/zero does instead of copying the strange nul_inotify_event. I can't quite convince myself len_to_zero will never exceed 16 and even if it doesn't clear_user should be more efficient and a more accurate reflection of what the code is trying to do. Signed-off-by:
Eric W. Biederman <ebiederm@aristanetworks.com> Signed-off-by:
Eric Paris <eparis@redhat.com>
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Eric Paris authored
The are races around the idr storage of inotify watches. It's possible that a watch could be found from sys_inotify_rm_watch() in the idr, but it could be removed from the idr before that code does it's removal. Move the locking and the refcnt'ing so that these have to happen atomically. Signed-off-by: -
Eric Paris authored
If an inotify watch is left in the idr when an fsnotify group is destroyed this will lead to a BUG. This is not a dangerous situation and really indicates a programming bug and leak of memory. This patch changes it to use a WARN and a printk rather than killing people's boxes. Signed-off-by: -
Eric Paris authored
There is nothing known wrong with the inotify watch addition/modification but this patch seperates the two code paths to make them each easy to verify as correct. Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: virtio: net refill on out-of-memory smc91x: fix compilation on SMP
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/ps3: Update ps3_defconfig powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
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Geoff Levand authored
Update ps3_defconfig. o Refresh for 2.6.31. o Remove MTD support. o Add more HID drivers. Signed-off-by:
Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by:
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Geert Uytterhoeven authored
On non-PS3, we get: | kernel BUG at drivers/rtc/rtc-ps3.c:36! because the rtc-ps3 platform device is registered unconditionally in a kernel with builtin support for PS3. Reported-by:
Sachin Sant <sachinp@in.ibm.com> Signed-off-by:
Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by:
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Linus Torvalds authored
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: IMA: iint put in ima_counts_get and put
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68kLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k,m68knommu: Wire up rt_tgsigqueueinfo and perf_counter_open m68k: Fix redefinition of pgprot_noncached arch/m68k/include/asm/motorola_pgalloc.h: fix kunmap arg m68k: cnt reaches -1, not 0 m68k: count can reach 51, not 50
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Thadeu Lima de Souza Cascardo authored
If we change the inverted attribute to another value, the LED will not be inverted until we change the GPIO state. Signed-off-by:
Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Cc: Samuel R. C. Vale <srcvale@holoscopio.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Thadeu Lima de Souza Cascardo authored
When setting the same GPIO number, multiple IRQ shared requests will be done without freing the previous request. It will also try to free a failed request or an already freed IRQ if 0 was written to the gpio file. All these oops and leaks were fixed with the following solution: keep the previous allocated GPIO (if any) still allocated in case the new request fails. The alternative solution would desallocate the previous allocated GPIO and set gpio as 0. Signed-off-by:
Samuel R. C. Vale <srcvale@holoscopio.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
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Frans Pop authored
This failure is very common on many platforms. Handling it in the ACPI processor driver is enough, and we don't need a warning message unless CONFIG_ACPI_DEBUG is set. Based on a patch from Zhang Rui. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389Signed-off-by:
Frans Pop <elendil@planet.nl> Acked-by:
Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <lenb@kernel.org> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by:
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Frans Pop authored
If the BIOS reports an invalid throttling state (which seems to be fairly common after system boot), a reset is done to state T0. Because of a check in acpi_processor_get_throttling_ptc(), the reset never actually gets executed, which results in the error reoccurring on every access of for example /proc/acpi/processor/CPU0/throttling. Add a 'force' option to acpi_processor_set_throttling() to ensure the reset really takes effect. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389 This patch, together with the next one, fixes a regression introduced in 2.6.30, listed on the regression list. They have been available for 2.5 months now in bugzilla, but have not been picked up, despite various reminders and without any reason given. Google shows that numerous people are hitting this issue. The issue is in itself relatively minor, but the bug in the code is clear. The patches have been in all my kernels and today testing has shown that throttling works correctly with the patches applied when the system overheats (http://bugzilla.kernel.org/show_bug.cgi?id=13918#c14). Signed-off-by:
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Costantino Leandro authored
Summary: Kernel panic arise when stack protection is enabled, since strncat will add a null terminating byte '\0'; So in functions like this one (wmi_query_block): char wc[4]="WC"; .... strncat(method, block->object_id, 2); ... the length of wc should be n+1 (wc[5]) or stack protection fault will arise. This is not noticeable when stack protection is disabled,but , isn't good either. Config used: [CONFIG_CC_STACKPROTECTOR_ALL=y, CONFIG_CC_STACKPROTECTOR=y] Panic Trace ------------ .... stack-protector: kernel stack corrupted in : fa7b182c 2.6.30-rc8-obelisco-generic call_trace: [<c04a6c40>] ? panic+0x45/0xd9 [<c012925d>] ? __stack_chk_fail+0x1c/0x40 [<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi] [<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi] [<fa7e7000>] ? acer_wmi_init+0x00/0x61a [acer_wmi] [<fa7e7135>] ? acer_wmi_init+0x135/0x61a [acer_wmi] [<c0101159>] ? do_one_initcall+0x50+0x126 Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13514Signed-off-by:Costantino Leandro <lcostantino@gmail.com> Signed-off-by:
Carlos Corbacho <carlos@strangeworlds.co.uk> Cc: Len Brown <len.brown@intel.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <stable@kernel.org> Signed-off-by:
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Yinghai Lu authored
Jens reported early_ioremap messages with old ASUS board... > [ 1.507461] pci 0000:00:09.0: Firmware left e100 interrupts enabled; disabling > [ 1.532778] early_ioremap(3fffd080, 0000005c) [0] => Pid: 1, comm: swapper Not tainted 2.6.31-rc4 #36 > [ 1.561007] Call Trace: > [ 1.568638] [<c136e48b>] ? printk+0x18/0x1d > [ 1.581734] [<c15513ff>] __early_ioremap+0x74/0x1e9 > [ 1.596898] [<c15515aa>] early_ioremap+0x1a/0x1c > [ 1.611270] [<c154a187>] __acpi_map_table+0x18/0x1a > [ 1.626451] [<c135a7f8>] acpi_os_map_memory+0x1d/0x25 > [ 1.642129] [<c119459c>] acpi_tb_verify_table+0x20/0x49 > [ 1.658321] [<c1193e50>] acpi_get_table_with_size+0x53/0xa1 > [ 1.675553] [<c1193eae>] acpi_get_table+0x10/0x15 > [ 1.690192] [<c155cc19>] acpi_processor_init+0x23/0xab > [ 1.706126] [<c1001043>] do_one_initcall+0x33/0x180 > [ 1.721279] [<c155cbf6>] ? acpi_processor_init+0x0/0xab > [ 1.737479] [<c106893a>] ? register_irq_proc+0xaa/0xc0 > [ 1.753411] [<c10689b7>] ? init_irq_proc+0x67/0x80 > [ 1.768316] [<c15405e7>] kernel_init+0x120/0x176 > [ 1.782678] [<c15404c7>] ? kernel_init+0x0/0x176 > [ 1.797062] [<c10038b7>] kernel_thread_helper+0x7/0x10 > [ 1.812984] 00000080 + ffe00000 that is rather later. acpi_gbl_permanent_mmap should be set in acpi_early_init() if acpi is not disabled and we have > [ 0.000000] ASUS P2B-DS detected: force use of acpi=ht just don't load acpi_processor_init... Reported-and-tested-by:
Jens Rosenboom <jens@leia.mcbone.net> Signed-off-by:
Yinghai Lu <yinghai@kernel.org> Acked-by:
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Michael Brunner authored
The return value of the get_temp function is not checked when doing a thermal zone update. This may lead to a critical shutdown if get_temp fails and the content of the temp variable is incorrectly set higher than the critical trip point. This has been observed on a system with incorrect ACPI implementation where the corresponding methods were not serialized and therefore sometimes triggered ACPI errors (AE_ALREADY_EXISTS). The following critical shutdowns indicated a temperature of 2097 C, which was obviously wrong. The patch adds a return value check that jumps over all trip point evaluations printing a warning if get_temp fails. The trip points are evaluated again on the next polling interval with successful get_temp execution. Signed-off-by:
Michael Brunner <mibru@gmx.de> Acked-by:
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Oleg Nesterov authored
Spotted by Hiroshi Shimamoto who also provided the test-case below. copy_process() uses signal->count as a reference counter, but it is not. This test case #include <sys/types.h> #include <sys/wait.h> #include <unistd.h> #include <stdio.h> #include <errno.h> #include <pthread.h> void *null_thread(void *p) { for (;;) sleep(1); return NULL; } void *exec_thread(void *p) { execl("/bin/true", "/bin/true", NULL); return null_thread(p); } int main(int argc, char **argv) { for (;;) { pid_t pid; int ret, status; pid = fork(); if (pid < 0) break; if (!pid) { pthread_t tid; pthread_create(&tid, NULL, exec_thread, NULL); for (;;) pthread_create(&tid, NULL, null_thread, NULL); } do { ret = waitpid(pid, &status, 0); } while (ret == -1 && errno == EINTR); } return 0; } quickly creates an unkillable task. If copy_process(CLONE_THREAD) races with de_thread() copy_signal()->atomic(signal->count) breaks the signal->notify_count logic, and the execing thread can hang forever in kernel space. Change copy_process() to increment count/live only when we know for sure we can't fail. In this case the forked thread will take care of its reference to signal correctly. If copy_process() fails, check CLONE_THREAD flag. If it it set - do nothing, the counters were not changed and current belongs to the same thread group. If it is not set, ->signal must be released in any case (and ->count must be == 1), the forked child is the only thread in the thread group. We need more cleanups here, in particular signal->count should not be used by de_thread/__exit_signal at all. This patch only fixes the bug. Reported-by:Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Tested-by:
Oleg Nesterov <oleg@redhat.com> Acked-by:
Roland McGrath <roland@redhat.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: <stable@kernel.org> Signed-off-by:
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Minchan Kim authored
An mlocked page might lose the isolatation race. This causes the page to clear PG_mlocked while it remains in a VM_LOCKED vma. This means it can be put onto the [in]active list. We can rescue it by using try_to_unmap() in shrink_page_list(). But now, As Wu Fengguang pointed out, vmscan has a bug. If the page has PG_referenced, it can't reach try_to_unmap() in shrink_page_list() but is put into the active list. If the page is referenced repeatedly, it can remain on the [in]active list without being moving to the unevictable list. This patch fixes it. Reported-by:
Wu Fengguang <fengguang.wu@intel.com> Signed-off-by:
Minchan Kim <minchan.kim@gmail.com> Reviewed-by:
KOSAKI Motohiro <<kosaki.motohiro@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by:
Rik van Riel <riel@redhat.com> Signed-off-by:
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David Rientjes authored
It's problematic to allow signed element_nr's or total's to be passed as part of the flex array API. flex_array_alloc() allows total_nr_elements to be set to a negative quantity, which is obviously erroneous. flex_array_get() and flex_array_put() allows negative array indices in dereferencing an array part, which could address memory mapped before struct flex_array. The fix is to convert all existing element_nr formals to be qualified as unsigned. Existing checks to compare it to total_nr_elements or the max array size based on element_size need not be changed. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by:
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David Rientjes authored
The `parts' member of struct flex_array should evaluate to an incomplete type so that sizeof() cannot be used and C99 does not require the zero-length specification. Signed-off-by:
Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by:
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David Rientjes authored
flex_array_free_parts() does not take `src' or `element_nr' formals, so remove their respective comments. Signed-off-by:
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David Rientjes authored
If all array elements fit into the base structure and data is copied using flex_array_put() starting at a non-zero index, flex_array_get() will fail to return the data. This fixes the bug by only checking for NULL parts when all elements do not fit in the base structure when flex_array_get() is used. Otherwise, fa_element_to_part_nr() will always be 0 since there are no parts structures needed and such element may never have been put. Thus, it will remain NULL due to the kzalloc() of the base. Additionally, flex_array_put() now only checks for a NULL part when all elements do not fit in the base structure. This is otherwise unnecessary since the base structure is guaranteed to exist (or we would have already hit a NULL pointer). Signed-off-by:
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Joonwoo Park authored
Fix incorrect verdict check and returns error if device_create failed, otherwise driver triggers kernel oops. Signed-off-by: Joonwoo Park<joonwpark81@gmail.com> Cc: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by:
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Eric Paris authored
ima_counts_get() calls ima_iint_find_insert_get() which takes a reference to the iint in question, but does not put that reference at the end of the function. This can lead to a nasty memory leak. Easy enough to reproduce: #include <sys/mman.h> #include <stdio.h> int main (void) { int i; void *ptr; for (i=0; i < 100000; i++) { ptr = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0); if (ptr == MAP_FAILED) return 2; munmap(ptr, 4096); } return 0; } Signed-off-by:James Morris <jmorris@namei.org>
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- 26 Aug, 2009 3 commits
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Geert Uytterhoeven authored
Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Acked-by:
Greg Ungerer <gerg@uclinux.org>
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Alexey Dobriyan authored
arch/m68k/include/asm/pgtable_mm.h:148:1: warning: "pgprot_noncached" redefined In file included from arch/m68k/include/asm/pgtable_mm.h:138, from arch/m68k/include/asm/pgtable.h:4, from include/linux/mm.h:40, from include/linux/pagemap.h:7, from include/linux/blkdev.h:12, from arch/m68k/emu/nfblock.c:17: include/asm-generic/pgtable.h:133:1: warning: this is the location of the previous definition pgprot_noncached() should be defined _before_ including asm-generic/pgtable.h Signed-off-by:Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Andrew Morton authored
arch/m68k/include/asm/motorola_pgalloc.h: In function 'pte_alloc_one': arch/m68k/include/asm/motorola_pgalloc.h:44: warning: passing argument 1 of 'kunmap' from incompatible pointer type Also, remove unneeded test for kmap() failure. Signed-off-by:
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