KCSAN: data-race in fuse_dev_do_read / fuse_queue

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in fuse_dev_do_read / fuse_queue_forget fuse	6				1	1816d	1816d	0/29	auto-closed as invalid on 2020/10/08 02:59

================================================================== BUG: KCSAN: data-race in fuse_dev_do_read / fuse_queue_forget write to 0xffff88802f14a6a0 of 8 bytes by task 17550 on cpu 0: fuse_queue_forget+0x77/0xd0 fs/fuse/dev.c:246 fuse_evict_inode+0x139/0x200 fs/fuse/inode.c:130 evict+0x19f/0x470 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput+0x421/0x510 fs/inode.c:1680 dentry_unlink_inode+0x1f3/0x210 fs/dcache.c:374 __dentry_kill+0x28b/0x450 fs/dcache.c:579 dentry_kill fs/dcache.c:692 [inline] dput+0x203/0x420 fs/dcache.c:878 __lookup_slow+0x139/0x250 fs/namei.c:1537 lookup_slow fs/namei.c:1561 [inline] walk_component+0x2a5/0x350 fs/namei.c:1861 lookup_last fs/namei.c:2310 [inline] path_lookupat+0x11d/0x550 fs/namei.c:2334 do_o_path fs/namei.c:3340 [inline] path_openat+0x1ae7/0x20a0 fs/namei.c:3362 do_filp_open+0xbd/0x1d0 fs/namei.c:3396 do_sys_openat2+0xa3/0x240 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_openat fs/open.c:1200 [inline] __se_sys_openat fs/open.c:1195 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1195 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88802f14a6a0 of 8 bytes by task 17538 on cpu 1: forget_pending fs/fuse/dev.c:1024 [inline] request_pending fs/fuse/dev.c:1030 [inline] fuse_dev_do_read+0x463/0xe70 fs/fuse/dev.c:1235 fuse_dev_read+0xa2/0xe0 fs/fuse/dev.c:1350 call_read_iter include/linux/fs.h:1897 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x552/0x5c0 fs/read_write.c:496 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 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: 1 PID: 17538 Comm: syz-executor.5 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================