f2fs: fix an oops in f2fs_is_compressed_page
This patch is to fix a crash:
#3 [
ffffb6580689f898] oops_end at
ffffffffa2835bc2
#4 [
ffffb6580689f8b8] no_context at
ffffffffa28766e7
#5 [
ffffb6580689f920] async_page_fault at
ffffffffa320135e
[exception RIP: f2fs_is_compressed_page+34]
RIP:
ffffffffa2ba83a2 RSP:
ffffb6580689f9d8 RFLAGS:
00010213
RAX:
0000000000000001 RBX:
fffffc0f50b34bc0 RCX:
0000000000002122
RDX:
0000000000002123 RSI:
0000000000000c00 RDI:
fffffc0f50b34bc0
RBP:
ffff97e815a40178 R8:
0000000000000000 R9:
ffff97e83ffc9000
R10:
0000000000032300 R11:
0000000000032380 R12:
ffffb6580689fa38
R13:
fffffc0f50b34bc0 R14:
ffff97e825cbd000 R15:
0000000000000c00
ORIG_RAX:
ffffffffffffffff CS: 0010 SS: 0018
#6 [
ffffb6580689f9d8] __is_cp_guaranteed at
ffffffffa2b7ea98
#7 [
ffffb6580689f9f0] f2fs_submit_page_write at
ffffffffa2b81a69
#8 [
ffffb6580689fa30] f2fs_do_write_meta_page at
ffffffffa2b99777
#9 [
ffffb6580689fae0] __f2fs_write_meta_page at
ffffffffa2b75f1a
#10 [
ffffb6580689fb18] f2fs_sync_meta_pages at
ffffffffa2b77466
#11 [
ffffb6580689fc98] do_checkpoint at
ffffffffa2b78e46
#12 [
ffffb6580689fd88] f2fs_write_checkpoint at
ffffffffa2b79c29
#13 [
ffffb6580689fdd0] f2fs_sync_fs at
ffffffffa2b69d95
#14 [
ffffb6580689fe20] sync_filesystem at
ffffffffa2ad2574
#15 [
ffffb6580689fe30] generic_shutdown_super at
ffffffffa2a9b582
#16 [
ffffb6580689fe48] kill_block_super at
ffffffffa2a9b6d1
#17 [
ffffb6580689fe60] kill_f2fs_super at
ffffffffa2b6abe1
#18 [
ffffb6580689fea0] deactivate_locked_super at
ffffffffa2a9afb6
#19 [
ffffb6580689feb8] cleanup_mnt at
ffffffffa2abcad4
#20 [
ffffb6580689fee0] task_work_run at
ffffffffa28bca28
#21 [
ffffb6580689ff00] exit_to_usermode_loop at
ffffffffa28050b7
#22 [
ffffb6580689ff38] do_syscall_64 at
ffffffffa280560e
#23 [
ffffb6580689ff50] entry_SYSCALL_64_after_hwframe at
ffffffffa320008c
This occurred when umount f2fs if enable F2FS_FS_COMPRESSION
with F2FS_IO_TRACE. Fixes it by adding IS_IO_TRACED_PAGE to check
validity of pid for page_private.
Signed-off-by: Yu Changchun <yuchangchun1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
projects / linux.git / commit