syzbot


WARNING in kcov_remote_start (4)

Status: fixed on 2024/07/10 08:24
Subsystems: usb
[Documentation on labels]
Reported-by: syzbot+7110e6a4069f19537d85@syzkaller.appspotmail.com
Fix commit: f85d39dd7ed8 kcov, usb: disable interrupts in kcov_remote_start_usb_softirq
First crash: 40d, last: 5d15h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [usb?] WARNING in kcov_remote_start (4) 0 (2) 2024/06/09 14:27
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kcov_remote_start (2) usb C 1153 1777d 1777d 0/27 closed as invalid on 2019/09/04 14:27
upstream WARNING in kcov_remote_start (5) usb 1142 now 1d15h 0/27 upstream: reported on 2024/07/14 08:47
upstream WARNING in kcov_remote_start (3) usb 265513 40d 109d 26/27 fixed on 2024/06/05 13:52
upstream WARNING in kcov_remote_start usb C 655 1777d 1777d 0/27 closed as invalid on 2019/09/03 16:37

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16 at kernel/kcov.c:871 kcov_remote_start+0x274/0x6e0 kernel/kcov.c:871
Modules linked in:
CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:kcov_remote_start+0x274/0x6e0 kernel/kcov.c:871
Code: c0 22 49 89 47 08 e9 87 00 00 00 f6 c4 01 0f 85 06 fe ff ff e9 dc fd ff ff 44 8b 95 1c 16 00 00 45 85 d2 0f 84 d5 fe ff ff 90 <0f> 0b 90 e9 b9 00 00 00 65 8b 05 55 e4 75 7e 49 c7 c0 d2 d4 3a 8d
RSP: 0018:ffffc90000007b48 EFLAGS: 00010002
RAX: 0000000080010101 RBX: 000000000002d648 RCX: ffffffff816ae7ce
RDX: 0000000000000002 RSI: ffffffff8b2cb200 RDI: ffffffff8b8ff640
RBP: ffff8880172fda00 R08: 0000000000000000 R09: fffffbfff284ca66
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880b922d648
R13: 0000000000000000 R14: 0100000000000005 R15: ffff8880172fda00
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f584d156578 CR3: 0000000041f12000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kcov_remote_start_usb include/linux/kcov.h:55 [inline]
 kcov_remote_start_usb_softirq include/linux/kcov.h:89 [inline]
 __usb_hcd_giveback_urb+0x35b/0x6e0 drivers/usb/core/hcd.c:1649
 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
 dummy_timer+0x17f6/0x3900 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 15 64 f4 75 7e 65 8b 05 65 f4 75 7e a9 00 01
RSP: 0018:ffffc90000156f70 EFLAGS: 00000283
RAX: 0000000000000002 RBX: ffffc90000156ff8 RCX: ffffffff813cd93d
RDX: ffff8880172fda00 RSI: 000000000009352a RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000009352a
R10: 00000000000a2000 R11: 0000000000000001 R12: ffffffff8a352a0c
R13: 000000000009352a R14: 00000000000a2000 R15: ffffc9000015702d
 orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
 unwind_next_frame+0x24b/0x23a0 arch/x86/kernel/unwind_orc.c:494
 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4123 [inline]
 __kmalloc_noprof+0x1ec/0x410 mm/slub.c:4136
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 cfg80211_inform_single_bss_data+0x51d/0x2080 net/wireless/scan.c:2265
 cfg80211_inform_bss_data+0x205/0x39d0 net/wireless/scan.c:3117
 cfg80211_inform_bss_frame_data+0x271/0x7c0 net/wireless/scan.c:3207
 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x47c/0xad0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5222 [inline]
 ieee80211_rx_list+0x1be1/0x2e90 net/mac80211/rx.c:5459
 ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5482
 ieee80211_rx include/net/mac80211.h:5093 [inline]
 ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:438
 tasklet_action_common.constprop.0+0x24c/0x3e0 kernel/softirq.c:785
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 run_ksoftirqd kernel/softirq.c:928 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920
 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
----------------
Code disassembly (best guess):
   0:	be b0 01 00 00       	mov    $0x1b0,%esi
   5:	e8 a0 ff ff ff       	call   0xffffffaa
   a:	31 c0                	xor    %eax,%eax
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  18:	00 00
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
* 2a:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2e:	65 48 8b 15 64 f4 75 	mov    %gs:0x7e75f464(%rip),%rdx        # 0x7e75f49a
  35:	7e
  36:	65 8b 05 65 f4 75 7e 	mov    %gs:0x7e75f465(%rip),%eax        # 0x7e75f4a2
  3d:	a9                   	.byte 0xa9
  3e:	00 01                	add    %al,(%rcx)

Crashes (107983):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/10 08:13 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kcov_remote_start
2024/07/10 01:55 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/10 00:52 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 23:00 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 22:48 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 21:47 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/09 20:26 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 19:36 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/09 17:33 upstream 4376e966ecb7 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/09 16:29 upstream 4376e966ecb7 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 16:11 upstream 4376e966ecb7 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 11:30 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 10:53 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/09 09:49 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 09:17 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 08:15 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 07:39 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 06:31 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 05:25 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 05:21 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 04:19 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/09 01:50 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2024/07/09 00:48 upstream 4376e966ecb7 cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/08 20:37 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/08 20:17 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/08 18:11 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kcov_remote_start
2024/07/08 17:06 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/08 15:48 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/07/08 15:37 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/08 14:19 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2024/06/09 13:52 upstream 771ed66105de 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/06/05 13:52 upstream 32f88d65f01b e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2024/07/10 07:25 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/10 06:07 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/10 04:45 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/10 00:53 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/09 23:50 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/09 18:34 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/09 14:57 upstream 4376e966ecb7 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/09 09:25 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/09 06:33 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/08 22:38 upstream 4376e966ecb7 cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/08 14:26 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2024/07/10 06:24 upstream 34afb82a3c67 bc144f9a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kcov_remote_start
2024/07/10 03:45 upstream 34afb82a3c67 bc144f9a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kcov_remote_start
2024/07/09 12:38 upstream 4376e966ecb7 39158d80 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kcov_remote_start
2024/07/09 03:07 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kcov_remote_start
2024/07/09 13:36 upstream 4376e966ecb7 39158d80 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in kcov_remote_start
2024/07/08 21:27 upstream 256abd8e550c bc23a442 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in kcov_remote_start
2024/07/06 11:07 net 0ec986ed7bab bc4ebbb5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in kcov_remote_start
2024/07/09 01:53 linux-next 0b58e108042b bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kcov_remote_start
2024/07/08 19:29 linux-next 0b58e108042b cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kcov_remote_start
2024/07/08 18:52 linux-next 0b58e108042b cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kcov_remote_start
2024/06/18 09:54 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5821bf2dffbe ce6011bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in kcov_remote_start
2024/07/10 03:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ef445d1539dd 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in kcov_remote_start
* Struck through repros no longer work on HEAD.