• Aneesh Kumar K.V's avatar
    9p: Fix the kernel crash on a failed mount · fb786100
    Aneesh Kumar K.V authored
    The patch fix the crash repoted below
    
    [   15.149907] BUG: unable to handle kernel NULL pointer dereference at 00000001
    [   15.150806] IP: [<c140b886>] p9_virtio_close+0x18/0x24
    .....
    ....
    [   15.150806] Call Trace:
    [   15.150806]  [<c1408e78>] ? p9_client_destroy+0x3f/0x163
    [   15.150806]  [<c1409342>] ? p9_client_create+0x25f/0x270
    [   15.150806]  [<c1063b72>] ? trace_hardirqs_on+0xb/0xd
    [   15.150806]  [<c11ed4e8>] ? match_token+0x64/0x164
    [   15.150806]  [<c1175e8d>] ? v9fs_session_init+0x2f1/0x3c8
    [   15.150806]  [<c109cfc9>] ? kmem_cache_alloc+0x98/0xb8
    [   15.150806]  [<c1063b72>] ? trace_hardirqs_on+0xb/0xd
    [   15.150806]  [<c1173dd1>] ? v9fs_get_sb+0x47/0x1e8
    [   15.150806]  [<c1173dea>] ? v9fs_get_sb+0x60/0x1e8
    [   15.150806]  [<c10a2e77>] ? vfs_kern_mount+0x81/0x11a
    [   15.150806]  [<c10a2f55>] ? do_kern_mount+0x33/0xbe
    [   15.150806]  [<c10b40b9>] ? do_mount+0x654/0x6b3
    [   15.150806]  [<c1038949>] ? do_page_fault+0x0/0x284
    [   15.150806]  [<c10b28ec>] ? copy_mount_options+0x73/0xd2
    [   15.150806]  [<c10b4179>] ? sys_mount+0x61/0x94
    [   15.150806]  [<c14284e9>] ? syscall_call+0x7/0xb
    ....
    [   15.203562] ---[ end trace 1dd159357709eb4b ]---
    [
    Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
    fb786100
trans_virtio.c 9.72 KB