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WARNING in kernfs_add_one

Status: fixed on 2018/07/09 18:05
Subsystems: kernfs
[Documentation on labels]
Reported-by: syzbot+df47f81c226b31d89fb1@syzkaller.appspotmail.com
Fix commit: 84d0c27d6233 driver core: Don't ignore class_dir_create_and_add() failure.
First crash: 2395d, last: 2330d
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
[PATCH 3.16 000/366] 3.16.61-rc1 review 375 (376) 2019/01/02 17:44
[PATCH 4.4 000/105] 4.4.139-stable review 106 (106) 2018/07/26 15:09
[PATCH 4.17 00/70] 4.17.3-stable review 75 (75) 2018/06/25 23:48
[PATCH 4.16 00/64] 4.16.18-stable review 66 (66) 2018/06/25 17:20
[PATCH 4.14 00/52] 4.14.52-stable review 54 (54) 2018/06/25 17:19
[PATCH 4.9 00/39] 4.9.110-stable review 39 (39) 2018/06/25 17:18
WARNING in kernfs_add_one 12 (13) 2018/05/07 10:10

Sample crash report:
RBP: 00007fff808f3e10 R08: 0000000000000002 R09: 00007fff80003534
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000006 R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
kernfs: ns required in 'ieee80211' for 'phy3'
WARNING: CPU: 0 PID: 4538 at fs/kernfs/dir.c:759 kernfs_add_one+0x406/0x4d0 fs/kernfs/dir.c:758
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4538 Comm: syz-executor486 Not tainted 4.17.0-rc3+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:kernfs_add_one+0x406/0x4d0 fs/kernfs/dir.c:758
RSP: 0018:ffff8801ca9eece0 EFLAGS: 00010286
RAX: 000000000000002d RBX: ffffffff87d5cee0 RCX: ffffffff8160ba7d
RDX: 0000000000000000 RSI: ffffffff81610731 RDI: ffff8801ca9ee840
RBP: ffff8801ca9eed20 R08: ffff8801d9538500 R09: 0000000000000006
R10: ffff8801d9538500 R11: 0000000000000000 R12: ffff8801ad1cb6c0
R13: ffffffff885da640 R14: 0000000000000020 R15: 0000000000000000
 kernfs_create_link+0x112/0x180 fs/kernfs/symlink.c:41
 sysfs_do_create_link_sd.isra.2+0x90/0x130 fs/sysfs/symlink.c:43
 sysfs_do_create_link fs/sysfs/symlink.c:79 [inline]
 sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:91
 device_add_class_symlinks drivers/base/core.c:1612 [inline]
 device_add+0x7a0/0x16d0 drivers/base/core.c:1810
 wiphy_register+0x178a/0x2430 net/wireless/core.c:806
 ieee80211_register_hw+0x13cd/0x35d0 net/mac80211/main.c:1047
 mac80211_hwsim_new_radio+0x1d9b/0x3410 drivers/net/wireless/mac80211_hwsim.c:2772
 hwsim_new_radio_nl+0x7a7/0xa60 drivers/net/wireless/mac80211_hwsim.c:3246
 genl_family_rcv_msg+0x889/0x1120 net/netlink/genetlink.c:599
 genl_rcv_msg+0xc6/0x170 net/netlink/genetlink.c:624
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 ___sys_sendmsg+0x805/0x940 net/socket.c:2117
 __sys_sendmsg+0x115/0x270 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4404c9
RSP: 002b:00007fff808f3e08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004404c9
RDX: 0000000000000000 RSI: 0000000020b3dfc8 RDI: 0000000000000005
RBP: 00007fff808f3e10 R08: 0000000000000002 R09: 00007fff80003534
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000006 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (174):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/05/05 12:59 net-next-old 8fb11a9a8d51 6a0382b5 .config console log report syz C ci-upstream-net-kasan-gce
2018/05/05 05:58 net-next-old 8fb11a9a8d51 9ce14f4b .config console log report syz ci-upstream-net-kasan-gce
2018/06/04 22:45 upstream 910470e03f34 a50d873b .config console log report ci-upstream-kasan-gce
2018/05/31 00:45 upstream d60d61f36b8f 2f93b54f .config console log report ci-upstream-kasan-gce-root
2018/06/06 00:59 upstream 5037be168f0e 863a24bb .config console log report ci-upstream-kasan-gce-386
2018/06/07 08:46 net-next-old 7170e6045a6a d2ba33fa .config console log report ci-upstream-net-kasan-gce
2018/06/06 22:30 net-next-old 7170e6045a6a e0e534c6 .config console log report ci-upstream-net-kasan-gce
2018/06/06 15:01 net-next-old 4016a7f15efc 41f9540d .config console log report ci-upstream-net-kasan-gce
2018/06/06 10:35 net-next-old 75d4e704fa8d 41f9540d .config console log report ci-upstream-net-kasan-gce
2018/06/05 21:38 net-next-old 75d4e704fa8d 863a24bb .config console log report ci-upstream-net-kasan-gce
2018/06/04 20:25 net-next-old 4cd328f83916 a50d873b .config console log report ci-upstream-net-kasan-gce
2018/05/05 03:32 net-next-old 8fb11a9a8d51 9ce14f4b .config console log report ci-upstream-net-kasan-gce
2018/07/09 03:39 https://github.com/google/kmsan.git master a00de5aa4da3 f25e5770 .config console log report ci-upstream-kmsan-gce
2018/07/07 16:04 https://github.com/google/kmsan.git master a00de5aa4da3 ab89aea9 .config console log report ci-upstream-kmsan-gce
2018/07/07 12:51 https://github.com/google/kmsan.git master a00de5aa4da3 6c0c0099 .config console log report ci-upstream-kmsan-gce
2018/07/05 22:47 https://github.com/google/kmsan.git master 86eb85c04833 d3b2a0e2 .config console log report ci-upstream-kmsan-gce
2018/07/05 10:28 https://github.com/google/kmsan.git master c1adbc427188 f525fd72 .config console log report ci-upstream-kmsan-gce
2018/07/04 15:34 https://github.com/google/kmsan.git master accdc89e1dc3 317fc8ea .config console log report ci-upstream-kmsan-gce
2018/07/03 06:44 https://github.com/google/kmsan.git master 4ca559bbdeaf 317fc8ea .config console log report ci-upstream-kmsan-gce
2018/07/03 05:12 https://github.com/google/kmsan.git master 4ca559bbdeaf 317fc8ea .config console log report ci-upstream-kmsan-gce
2018/06/29 03:57 https://github.com/google/kmsan.git master 123906095e30 dba0b50e .config console log report ci-upstream-kmsan-gce
2018/06/28 17:51 https://github.com/google/kmsan.git master 123906095e30 dba0b50e .config console log report ci-upstream-kmsan-gce
2018/06/27 16:33 https://github.com/google/kmsan.git master 123906095e30 43e60f7e .config console log report ci-upstream-kmsan-gce
2018/06/27 03:27 https://github.com/google/kmsan.git master 123906095e30 b0294c53 .config console log report ci-upstream-kmsan-gce
2018/06/27 02:08 https://github.com/google/kmsan.git master 123906095e30 b0294c53 .config console log report ci-upstream-kmsan-gce
2018/06/23 15:07 https://github.com/google/kmsan.git master 123906095e30 2064fc5c .config console log report ci-upstream-kmsan-gce
2018/06/21 02:25 https://github.com/google/kmsan.git master 123906095e30 095ef806 .config console log report ci-upstream-kmsan-gce
2018/06/20 08:13 https://github.com/google/kmsan.git master 123906095e30 095ef806 .config console log report ci-upstream-kmsan-gce
2018/06/19 21:41 https://github.com/google/kmsan.git master 123906095e30 732e4256 .config console log report ci-upstream-kmsan-gce
2018/06/17 07:02 https://github.com/google/kmsan.git master 88e0e95b30f1 27c5f59f .config console log report ci-upstream-kmsan-gce
2018/06/15 04:05 https://github.com/google/kmsan.git master 88e0e95b30f1 27c5f59f .config console log report ci-upstream-kmsan-gce
2018/06/13 12:38 https://github.com/google/kmsan.git master 5cdf0501ac1b 27c5f59f .config console log report ci-upstream-kmsan-gce
2018/06/12 12:23 https://github.com/google/kmsan.git master 5cdf0501ac1b 112eec79 .config console log report ci-upstream-kmsan-gce
2018/06/12 03:58 https://github.com/google/kmsan.git master 5cdf0501ac1b 112eec79 .config console log report ci-upstream-kmsan-gce
2018/06/09 15:24 https://github.com/google/kmsan.git master d6c351f832e3 866118af .config console log report ci-upstream-kmsan-gce
2018/06/09 03:57 https://github.com/google/kmsan.git master d6c351f832e3 866118af .config console log report ci-upstream-kmsan-gce
2018/06/08 23:02 https://github.com/google/kmsan.git master d6c351f832e3 866118af .config console log report ci-upstream-kmsan-gce
2018/06/08 00:56 https://github.com/google/kmsan.git master c6a6aed994b6 645e75f8 .config console log report ci-upstream-kmsan-gce
2018/06/07 21:21 https://github.com/google/kmsan.git master c6a6aed994b6 645e75f8 .config console log report ci-upstream-kmsan-gce
2018/06/07 20:09 https://github.com/google/kmsan.git master c6a6aed994b6 645e75f8 .config console log report ci-upstream-kmsan-gce
2018/06/06 18:16 https://github.com/google/kmsan.git master b9a5d319699c 41f9540d .config console log report ci-upstream-kmsan-gce
2018/06/06 12:19 https://github.com/google/kmsan.git master 8fc8ecd1c58a 41f9540d .config console log report ci-upstream-kmsan-gce
2018/06/06 08:03 https://github.com/google/kmsan.git master 8fc8ecd1c58a 863a24bb .config console log report ci-upstream-kmsan-gce
2018/06/05 15:00 https://github.com/google/kmsan.git master 8fc8ecd1c58a a316ff92 .config console log report ci-upstream-kmsan-gce
2018/06/05 11:36 https://github.com/google/kmsan.git master 8fc8ecd1c58a a316ff92 .config console log report ci-upstream-kmsan-gce
2018/06/04 18:46 https://github.com/google/kmsan.git master 8fc8ecd1c58a 6cbe7c26 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.