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authorChao Yu <yuchao0@huawei.com>2019-04-15 09:28:33 +0200
committerJaegeuk Kim <jaegeuk@kernel.org>2019-05-09 06:23:08 +0200
commit546d22f070d64a7b96f57c93333772085d3a5e6d (patch)
treeb3378c3069f3ee8700ee8a8147e40a4de93c4fe3 /fs/f2fs/inode.c
parentf2fs: remove new blank line of f2fs kernel message (diff)
downloadlinux-546d22f070d64a7b96f57c93333772085d3a5e6d.tar.xz
linux-546d22f070d64a7b96f57c93333772085d3a5e6d.zip
f2fs: fix to clear dirty inode in error path of f2fs_iget()
As Jungyeon reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203217 - Overview When mounting the attached crafted image and running program, I got this error. Additionally, it hangs on sync after running the program. The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on. - Reproduces cc poc_test_05.c mkdir test mount -t f2fs tmp.img test sudo ./a.out sync - Messages kernel BUG at fs/f2fs/inode.c:707! RIP: 0010:f2fs_evict_inode+0x33f/0x3a0 Call Trace: evict+0xba/0x180 f2fs_iget+0x598/0xdf0 f2fs_lookup+0x136/0x320 __lookup_slow+0x92/0x140 lookup_slow+0x30/0x50 walk_component+0x1c1/0x350 path_lookupat+0x62/0x200 filename_lookup+0xb3/0x1a0 do_readlinkat+0x56/0x110 __x64_sys_readlink+0x16/0x20 do_syscall_64+0x43/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 During inode loading, __recover_inline_status() can recovery inode status and set inode dirty, once we failed in following process, it will fail the check in f2fs_evict_inode, result in trigger BUG_ON(). Let's clear dirty inode in error path of f2fs_iget() to avoid panic. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to '')
-rw-r--r--fs/f2fs/inode.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index e7f2e8759315..4edd6f2bb491 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -488,6 +488,7 @@ make_now:
return inode;
bad_inode:
+ f2fs_inode_synced(inode);
iget_failed(inode);
trace_f2fs_iget_exit(inode, ret);
return ERR_PTR(ret);