syzbot


BUG: corrupted list in kref_put

Status: upstream: reported on 2022/09/18 06:13
Reported-by: syzbot+e07ad07cb2283bc5bf57@syzkaller.appspotmail.com
First crash: 92d, last: 66d

Sample crash report:
list_del corruption. prev->next should be ffff0000ee1022c8, but was ffff80000da89120. (prev=ffff0000c559fcc8)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 3071 Comm: kworker/u5:1 Not tainted 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: hci5 hci_error_reset
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
lr : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
sp : ffff800012a7bb10
x29: ffff800012a7bb10 x28: ffff80000d28b000 x27: ffff0000c9504825
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0000c0d77a00
x23: ffff0000fbb03500 x22: ffff800009a511c0 x21: ffff0000c0f30149
x20: ffff0000ee1022c0 x19: ffff0000ee1022d8 x18: 00000000000000c0
x17: 20747562202c3863 x16: ffff80000db49158 x15: ffff0000fbb03500
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000fbb03500
x11: ff808000081c1630 x10: 0000000000000000 x9 : c129a9ed5f738d00
x8 : c129a9ed5f738d00 x7 : ffff800008195d30 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecd0 x1 : 0000000100000001 x0 : 000000000000006d
Call trace:
 __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 klist_release lib/klist.c:189 [inline]
 kref_put+0x6c/0x1d0 include/linux/kref.h:65
 klist_dec_and_del lib/klist.c:206 [inline]
 klist_put lib/klist.c:217 [inline]
 klist_del+0x58/0xb0 lib/klist.c:230
 device_del+0x280/0x5bc drivers/base/core.c:3699
 hci_conn_del_sysfs+0xb0/0xfc net/bluetooth/hci_sysfs.c:78
 hci_conn_cleanup+0x2d4/0x380 net/bluetooth/hci_conn.c:147
 hci_conn_del+0x144/0x2a8 net/bluetooth/hci_conn.c:1022
 hci_conn_hash_flush+0xe8/0x148 net/bluetooth/hci_conn.c:2367
 hci_dev_close_sync+0x48c/0x9e0 net/bluetooth/hci_sync.c:4476
 hci_dev_do_close net/bluetooth/hci_core.c:554 [inline]
 hci_error_reset+0xac/0x154 net/bluetooth/hci_core.c:1050
 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
 worker_thread+0x340/0x610 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20
Code: 9001b460 912d2000 aa0803e3 94a768fe (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-gce-arm64 2022/09/24 00:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 0042f2b4 .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/22 07:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aa49f95768a9 60af5050 .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/20 21:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5aa266bb455b c4b8ccfd .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/20 08:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 7c41a9ba .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/19 06:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 dd9a85ff .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/18 06:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 dd9a85ff .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/15 01:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 b884348d .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/06 09:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 25050c56fa3c 65aea2b9 .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/09/05 10:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 85413d1e802e 922294ab .config log report info BUG: corrupted list in kref_put
ci-upstream-gce-arm64 2022/08/29 09:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a41a877bc12d 07177916 .config log report info BUG: corrupted list in kref_put
* Struck through repros no longer work on HEAD.