Hello,
syzbot found the following issue on:
HEAD commit: e28c0d7c Merge branch 'akpm' (patches from Andrew)
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=14d529d6500000
kernel config:
https://syzkaller.appspot.com/x/.config?x=671e27f23e60a67b
dashboard link:
https://syzkaller.appspot.com/bug?extid=9cdf8302f991d9f3379b
compiler: clang version 12.0.0 (
https://github.com/llvm/llvm-project.git 913f6005669cfb590c99865a90bc51ed0983d09d)
CC: [
linux-...@vger.kernel.org linux-...@vger.kernel.org mik...@szeredi.hu]
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+9cdf83...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in fuse_get_req / fuse_set_initialized
write to 0xffff888011c18704 of 4 bytes by task 11266 on cpu 1:
fuse_set_initialized+0x15/0x30 fs/fuse/dev.c:82
process_init_reply+0xdf/0xb40 fs/fuse/inode.c:1078
fuse_request_end+0x764/0x7a0 fs/fuse/dev.c:332
fuse_dev_do_write+0xba1/0xe40 fs/fuse/dev.c:1921
fuse_dev_write+0x98/0xe0 fs/fuse/dev.c:1943
call_write_iter include/linux/fs.h:1903 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0x6d4/0x7c0 fs/read_write.c:605
ksys_write+0xce/0x180 fs/read_write.c:658
__do_sys_write fs/read_write.c:670 [inline]
__se_sys_write fs/read_write.c:667 [inline]
__x64_sys_write+0x3e/0x50 fs/read_write.c:667
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff888011c18704 of 4 bytes by task 11256 on cpu 0:
fuse_block_alloc fs/fuse/dev.c:87 [inline]
fuse_get_req+0xfd/0x520 fs/fuse/dev.c:115
fuse_simple_request+0x83/0xdd0 fs/fuse/dev.c:504
fuse_lookup_name+0x153/0x3b0 fs/fuse/dir.c:429
fuse_lookup+0x6b/0x290 fs/fuse/dir.c:467
__lookup_slow+0x181/0x250 fs/namei.c:1544
lookup_slow fs/namei.c:1561 [inline]
walk_component+0x2a5/0x350 fs/namei.c:1861
link_path_walk+0x451/0x710 fs/namei.c:2180
path_parentat fs/namei.c:2386 [inline]
filename_parentat+0xf7/0x970 fs/namei.c:2408
filename_create+0x58/0x3c0 fs/namei.c:3450
user_path_create fs/namei.c:3525 [inline]
do_mkdirat+0x5a/0x220 fs/namei.c:3665
__do_sys_mkdir fs/namei.c:3689 [inline]
__se_sys_mkdir fs/namei.c:3687 [inline]
__x64_sys_mkdir+0x32/0x40 fs/namei.c:3687
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: 11256 Comm: syz-executor.0 Not tainted 5.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
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