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authorJean Delvare <khali@linux-fr.org>2009-11-26 09:22:33 +0100
committerJean Delvare <khali@linux-fr.org>2009-11-26 09:22:33 +0100
commitbbd2d9c9198c6efd449e9d395b3eaf2d03aa3bba (patch)
tree671d1810b5adaf49d2166ef238dc247ad05f0d00 /ipc/mq_sysctl.c
parent03b70d625c10d1605012d41489d9df18467c5f55 (diff)
i2c: Fix userspace_device list corruption
Fix userspace_device list corruption. The corruption was caused by clients not being removed when adapters with such clients were themselves removed. Something like the following would trigger it (assuming i2c-stub gets adapter number 3): # modprobe i2c-stub chip_addr=0x50 # echo 24c08 0x50 > /sys/bus/i2c/devices/i2c-3/new_device # rmmod i2c-stub # modprobe i2c-stub chip_addr=0x50 # echo 24c08 0x50 > /sys/bus/i2c/devices/i2c-3/new_device For the records, the stack trace in the kernel logs look like this: kernel: WARNING: at lib/list_debug.c:30 __list_add+0x8b/0x90() kernel: Hardware name: (...) kernel: list_add corruption. prev->next should be next (c137fc84), but was (null). (prev=f57111b8). kernel: Modules linked in: (...) kernel: Pid: 4669, comm: bash Not tainted 2.6.32-rc8 #259 kernel: Call Trace: kernel: [<c111eb8b>] ? __list_add+0x8b/0x90 kernel: [<c111eb8b>] ? __list_add+0x8b/0x90 kernel: [<c103265c>] warn_slowpath_common+0x6c/0xc0 kernel: [<c111eb8b>] ? __list_add+0x8b/0x90 kernel: [<c10326f6>] warn_slowpath_fmt+0x26/0x30 kernel: [<c111eb8b>] __list_add+0x8b/0x90 kernel: [<c11ba165>] i2c_sysfs_new_device+0x1c5/0x250 kernel: [<c10861be>] ? might_fault+0x2e/0x80 kernel: [<c11b9fa0>] ? i2c_sysfs_new_device+0x0/0x250 kernel: [<c118c625>] dev_attr_store+0x25/0x30 kernel: [<c10e305c>] sysfs_write_file+0x9c/0xf0 kernel: [<c109d35c>] vfs_write+0x9c/0x160 kernel: [<c10e2fc0>] ? sysfs_write_file+0x0/0xf0 kernel: [<c109d4dd>] sys_write+0x3d/0x70 kernel: [<c1002ed8>] sysenter_do_call+0x12/0x36 Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'ipc/mq_sysctl.c')
0 files changed, 0 insertions, 0 deletions