WARNING: refcount bug in kobject

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: refcount bug in kobject_get kernel	C			530	1715d	2048d	0/26	closed as invalid on 2019/08/19 12:30
linux-4.19	WARNING: refcount bug in kobject_get	C		done	21	1598d	1827d	1/1	fixed on 2020/01/03 09:37

upstream

WARNING: refcount bug in kobject_get kernel

530

1715d

2048d

0/26

closed as invalid on 2019/08/19 12:30

linux-4.19

WARNING: refcount bug in kobject_get

done

1598d

1827d

1/1

fixed on 2020/01/03 09:37


Created	Duration	User	Patch	Repo	Result
2020/01/03 01:25	3h56m	bisect fix		linux-4.14.y	job log (1)
2019/12/04 00:57	28m	bisect fix		linux-4.14.y	job log (0) log

refcount_t: increment on 0; use-after-free. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10588 at lib/refcount.c:153 refcount_inc lib/refcount.c:153 [inline] WARNING: CPU: 0 PID: 10588 at lib/refcount.c:153 refcount_inc.cold+0x18/0x1f lib/refcount.c:151 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10588 Comm: syz-executor199 Not tainted 4.14.134 #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 panic+0x1f2/0x426 kernel/panic.c:182 __warn.cold+0x2f/0x36 kernel/panic.c:546 report_bug+0x216/0x254 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960 RIP: 0010:refcount_inc lib/refcount.c:153 [inline] RIP: 0010:refcount_inc.cold+0x18/0x1f lib/refcount.c:151 RSP: 0018:ffff88809e2d79c0 EFLAGS: 00010286 RAX: 000000000000002b RBX: ffffffff86faaaa0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff866d0e00 RDI: ffffed1013c5af2e RBP: ffff88809e2d79c8 R08: 000000000000002b R09: ffff888092118d88 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821a9d34f8 R13: 0000000000000000 R14: ffff88821a9d34c0 R15: ffff88809725d6a0 kref_get include/linux/kref.h:47 [inline] kobject_get+0x5b/0x70 lib/kobject.c:596 kset_get include/linux/kobject.h:210 [inline] kobj_kset_join lib/kobject.c:169 [inline] kobject_add_internal.part.0+0xfc/0x340 lib/kobject.c:220 kobject_add_internal lib/kobject.c:205 [inline] kobject_add_varg lib/kobject.c:364 [inline] kobject_add+0x11f/0x180 lib/kobject.c:409 class_dir_create_and_add drivers/base/core.c:1484 [inline] get_device_parent.isra.0+0x415/0x560 drivers/base/core.c:1539 device_add+0x2d3/0x1490 drivers/base/core.c:1795 hci_register_dev+0x2d9/0x810 net/bluetooth/hci_core.c:3118 __vhci_create_device+0x2a6/0x560 drivers/bluetooth/hci_vhci.c:139 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:219 [inline] vhci_write+0x2a1/0x437 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x4a7/0x6b0 fs/read_write.c:482 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x441279 RSP: 002b:00007ffccae67678 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441279 RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000007747d R08: 00000000004002c8 R09: 00000000004002c8 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401ff0 R13: 0000000000402080 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..

Crashes (20):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Manager
2019/07/25 07:26	linux-4.14.y	ff33472c282e	32329ceb	.config	console log	report	syz	C	ci2-linux-4-14
2019/07/04 15:06	linux-4.14.y	e3c1b27308ae	55565fa0	.config	console log	report	syz	C	ci2-linux-4-14
2019/04/27 06:58	linux-4.14.y	68d7a45eec10	b617407b	.config	console log	report	syz	C	ci2-linux-4-14
2019/04/26 11:12	linux-4.14.y	68d7a45eec10	b617407b	.config	console log	report	syz	C	ci2-linux-4-14
2019/04/23 21:11	linux-4.14.y	68d7a45eec10	2398edea	.config	console log	report	syz	C	ci2-linux-4-14
2019/04/14 12:01	linux-4.14.y	1ec8f1f0bffe	505ab413	.config	console log	report	syz	C	ci2-linux-4-14
2019/05/04 05:59	linux-4.14.y	1c046f373132	d28f4ce5	.config	console log	report	syz		ci2-linux-4-14
2019/04/28 17:09	linux-4.14.y	fa5941f45d7e	b617407b	.config	console log	report	syz		ci2-linux-4-14
2019/08/10 16:28	linux-4.14.y	3ffe1e79c174	acb51638	.config	console log	report			ci2-linux-4-14
2019/08/03 08:43	linux-4.14.y	10d6aa565d05	6affd8e8	.config	console log	report			ci2-linux-4-14
2019/07/30 17:27	linux-4.14.y	ff33472c282e	f28bf2a5	.config	console log	report			ci2-linux-4-14
2019/07/25 18:04	linux-4.14.y	ff33472c282e	0d7a1249	.config	console log	report			ci2-linux-4-14
2019/07/01 00:08	linux-4.14.y	f4cc0ed9b2c7	699d6448	.config	console log	report			ci2-linux-4-14
2019/06/26 08:44	linux-4.14.y	bc2bccef19ee	0a8d1a96	.config	console log	report			ci2-linux-4-14
2019/06/21 07:56	linux-4.14.y	bb263a2a2d43	34bf9440	.config	console log	report			ci2-linux-4-14
2019/06/20 00:37	linux-4.14.y	bb263a2a2d43	34bf9440	.config	console log	report			ci2-linux-4-14
2019/06/14 15:25	linux-4.14.y	2bf3258a12af	998ccc76	.config	console log	report			ci2-linux-4-14
2019/06/11 10:30	linux-4.14.y	e6a95d8851f1	5b5826d0	.config	console log	report			ci2-linux-4-14
2019/04/26 15:13	linux-4.14.y	68d7a45eec10	b617407b	.config	console log	report			ci2-linux-4-14
2019/04/14 09:43	linux-4.14.y	1ec8f1f0bffe	505ab413	.config	console log	report			ci2-linux-4-14

Crashes (20):

Assets (help?)

2019/07/25 07:26

linux-4.14.y