diff options
author | Sahitya Tummala <stummala@codeaurora.org> | 2018-12-26 11:20:29 +0530 |
---|---|---|
committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-01-02 16:17:55 -0800 |
commit | 652f47425fe041459d03cdde0cfcbb88d79e4e26 (patch) | |
tree | 5cc4107eee0034625b123d7a6fa615ea86a23142 /kernel/fork.c | |
parent | c0d46fe1b7cf123dea82bcb530eb02ca8b974a4a (diff) |
f2fs: fix use-after-free issue when accessing sbi->stat_info
iput() on sbi->node_inode can update sbi->stat_info
in the below context, if the f2fs_write_checkpoint()
has failed with error.
f2fs_balance_fs_bg+0x1ac/0x1ec
f2fs_write_node_pages+0x4c/0x260
do_writepages+0x80/0xbc
__writeback_single_inode+0xdc/0x4ac
writeback_single_inode+0x9c/0x144
write_inode_now+0xc4/0xec
iput+0x194/0x22c
f2fs_put_super+0x11c/0x1e8
generic_shutdown_super+0x70/0xf4
kill_block_super+0x2c/0x5c
kill_f2fs_super+0x44/0x50
deactivate_locked_super+0x60/0x8c
deactivate_super+0x68/0x74
cleanup_mnt+0x40/0x78
Fix this by moving f2fs_destroy_stats() further below iput() in
both f2fs_put_super() and f2fs_fill_super() paths.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions