Hello,
syzbot found the following issue on:
HEAD commit: 0fa8ee0d Merge branch 'for-linus' of git://
git.kernel.org/..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=120ef661500000
kernel config:
https://syzkaller.appspot.com/x/.config?x=e9a6e9171a00e85a
dashboard link:
https://syzkaller.appspot.com/bug?extid=b8d0ddf36fbf69a1e066
compiler: clang version 12.0.0 (
https://github.com/llvm/llvm-project.git 913f6005669cfb590c99865a90bc51ed0983d09d)
CC: [
adilger...@dilger.ca linux...@vger.kernel.org linux-...@vger.kernel.org ty...@mit.edu]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+b8d0dd...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in __ext4_update_other_inode_time / iput
write to 0xffff88800e9c61d8 of 8 bytes by task 8871 on cpu 1:
__ext4_update_other_inode_time+0xc1/0x550 fs/ext4/inode.c:4966
ext4_update_other_inodes_time fs/ext4/inode.c:5002 [inline]
ext4_do_update_inode fs/ext4/inode.c:5131 [inline]
ext4_mark_iloc_dirty+0x1286/0x1650 fs/ext4/inode.c:5712
__ext4_mark_inode_dirty+0x450/0x610 fs/ext4/inode.c:5906
ext4_ext_tree_init+0x7e/0x90 fs/ext4/extents.c:828
__ext4_new_inode+0x2a8e/0x3060 fs/ext4/ialloc.c:1326
ext4_symlink+0x2bc/0x770 fs/ext4/namei.c:3336
vfs_symlink+0x216/0x2d0 fs/namei.c:3960
do_symlinkat+0xee/0x280 fs/namei.c:3987
__do_sys_symlink fs/namei.c:4006 [inline]
__se_sys_symlink fs/namei.c:4004 [inline]
__x64_sys_symlink+0x32/0x40 fs/namei.c:4004
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff88800e9c61d8 of 8 bytes by task 8464 on cpu 0:
iput+0x2e/0x510 fs/inode.c:1670
dentry_unlink_inode+0x1f3/0x210 fs/dcache.c:374
d_delete+0x70/0xa0 fs/dcache.c:2470
vfs_unlink+0x38f/0x3b0 fs/namei.c:3847
do_unlinkat+0x28a/0x4d0 fs/namei.c:3897
__do_sys_unlink fs/namei.c:3943 [inline]
__se_sys_unlink fs/namei.c:3941 [inline]
__x64_sys_unlink+0x2c/0x30 fs/namei.c:3941
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8464 Comm: syz-executor.5 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
This report is generated by a bot. It may contain errors.
See
https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at
syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.