Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes: > On Fri, 04 Oct 2024 15:20:34 +0900 OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> wrote: > >> syzbot <syzbot+ef0d7bc412553291aa86@xxxxxxxxxxxxxxxxxxxxxxxxx> writes: >> >> > git tree: upstream >> > console+strace: https://syzkaller.appspot.com/x/log.txt?x=11b54ea9980000 >> > kernel config: https://syzkaller.appspot.com/x/.config?x=92da5062b0d65389 >> > dashboard link: https://syzkaller.appspot.com/bug?extid=ef0d7bc412553291aa86 >> > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 >> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b7ed07980000 >> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=101dfd9f980000 [...] >> > IMPORTANT: if you fix the issue, please add the following tag to the commit: >> > Reported-by: syzbot+ef0d7bc412553291aa86@xxxxxxxxxxxxxxxxxxxxxxxxx >> >> The patch fixes this bug. Please apply. >> Thanks. >> >> >> From: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> >> Subject: [PATCH] fat: Fix uninitialized variable >> Date: Fri, 04 Oct 2024 15:03:49 +0900 >> >> Reported-by: syzbot+ef0d7bc412553291aa86@xxxxxxxxxxxxxxxxxxxxxxxxx >> Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> > > Could we please have some description? Seems that an IO error triggers this? OK, I added the description guessed from syzbot log. Thanks. From: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> Subject: [PATCH v2] fat: Fix uninitialized variable Date: Fri, 04 Oct 2024 15:03:49 +0900 This produced by corrupted fs image of syzbot, in theory, however IO error would trigger this too. This affects just a error report, so should not be serious error. Reported-by: syzbot+ef0d7bc412553291aa86@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> --- fs/fat/namei_vfat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 6423e1d..15bf32c 100644 --- a/fs/fat/namei_vfat.c 2024-10-04 14:51:50.473038530 +0900 +++ b/fs/fat/namei_vfat.c 2024-10-04 14:56:53.108618655 +0900 @@ -1037,7 +1037,7 @@ error_inode: if (corrupt < 0) { fat_fs_error(new_dir->i_sb, "%s: Filesystem corrupted (i_pos %lld)", - __func__, sinfo.i_pos); + __func__, new_i_pos); } goto out; } _ -- OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
