syzbot


KCSAN: data-race in __radix_tree_delete / radix_tree_iter_tag_clear

Status: auto-closed as invalid on 2022/07/21 07:54
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 174d, last: 174d

Sample crash report:
BUG: KCSAN: data-race in __radix_tree_delete / radix_tree_iter_tag_clear

write to 0xffff888126769228 of 8 bytes by task 26280 on cpu 1:
 instrument_write include/linux/instrumented.h:42 [inline]
 __set_bit include/asm-generic/bitops/instrumented-non-atomic.h:27 [inline]
 tag_set lib/radix-tree.c:101 [inline]
 node_tag_set lib/radix-tree.c:943 [inline]
 __radix_tree_delete+0x185/0x560 lib/radix-tree.c:1372
 radix_tree_delete_item+0x1a7/0x260 lib/radix-tree.c:1429
 idr_remove+0x2a/0x30 lib/idr.c:154
 __kernfs_new_node+0x2cc/0x330 fs/kernfs/dir.c:640
 kernfs_new_node fs/kernfs/dir.c:655 [inline]
 kernfs_create_dir_ns+0x5e/0x140 fs/kernfs/dir.c:1010
 sysfs_create_dir_ns+0xa3/0x1a0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:63 [inline]
 kobject_add_internal+0x487/0x790 lib/kobject.c:223

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2022/06/16 07:45 upstream 30306f6194ca 1719ee24 .config log report info KCSAN: data-race in __radix_tree_delete / radix_tree_iter_tag_clear
* Struck through repros no longer work on HEAD.