syzbot


WARNING in dev_watchdog (2)
Status: upstream: reported C repro on 2020/03/30 07:12
Reported-by: syzbot+d55372214aff0faa1f1f@syzkaller.appspotmail.com
First crash: 910d, last: 2h55m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in dev_watchdog (log)
Repro: C syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in dev_watchdog 25 1713d 1738d 0/22 closed as invalid on 2017/10/22 12:45

Sample crash report:
------------[ cut here ]------------
NETDEV WATCHDOG: sl14 (): transmit queue 0 timed out
WARNING: CPU: 1 PID: 20260 at net/sched/sch_generic.c:478 dev_watchdog+0x81d/0x860 net/sched/sch_generic.c:477
Modules linked in:
CPU: 1 PID: 20260 Comm: dhcpcd-run-hook Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dev_watchdog+0x81d/0x860 net/sched/sch_generic.c:477
Code: 99 51 44 f9 c6 05 0d 02 ab 05 01 4c 89 e7 e8 ba fd e2 ff 48 c7 c7 e0 fb 9c 8b 4c 89 e6 48 89 c2 44 89 e9 31 c0 e8 33 2b 0e f9 <0f> 0b e9 2b fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 3c fc
RSP: 0018:ffffc90000dc0b40 EFLAGS: 00010246
RAX: 994dcd9ba1567700 RBX: 00000000ffffddd0 RCX: ffff8880a7b69d00
RDX: 0000000000000102 RSI: 0000000000000102 RDI: 0000000000000000
RBP: 00000000ffffde41 R08: ffffffff816a1d52 R09: fffff520001b80b9
R10: fffff520001b80b9 R11: 0000000000000000 R12: ffff88807dc5e000
R13: 0000000000000000 R14: ffff88807a490068 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562f1294c000 CR3: 0000000179f36000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x71a/0x910 kernel/time/timer.c:1734
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:get_flush_tlb_info arch/x86/mm/tlb.c:966 [inline]
RIP: 0010:flush_tlb_mm_range+0x1a2/0x490 arch/x86/mm/tlb.c:1004
Code: e8 03 80 3c 18 00 74 05 e8 6b 78 94 00 4d 89 7d 10 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 52 78 94 00 48 8b 04 24 <49> 89 45 00 49 8d 7d 24 48 89 f8 48 c1 e8 03 8a 04 18 84 c0 0f 85
RSP: 0018:ffffc90020abf660 EFLAGS: 00000246
RAX: ffff888152e71500 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8880b9b38d90
RBP: ffffc90020abf720 R08: dffffc0000000000 R09: ffffed102a5ce325
R10: ffffed102a5ce325 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9b38d80 R14: 0000000000000009 R15: ffffffffffffffff
 tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:426 [inline]
 tlb_flush_mmu+0x1a7/0x910 mm/mmu_gather.c:248
 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:340
 exit_mmap+0x3dd/0x6f0 mm/mmap.c:3172
 __mmput+0x111/0x3a0 kernel/fork.c:1113
 exec_mmap+0x589/0x610 fs/exec.c:1028
 begin_new_exec+0x6c9/0x1180 fs/exec.c:1286
 load_elf_binary+0x851/0x3c60 fs/binfmt_elf.c:1001
 search_binary_handler fs/exec.c:1723 [inline]
 exec_binprm fs/exec.c:1764 [inline]
 bprm_execve+0x8eb/0x1470 fs/exec.c:1833
 do_execveat_common+0x44c/0x590 fs/exec.c:1922
 do_execve fs/exec.c:1990 [inline]
 __do_sys_execve fs/exec.c:2066 [inline]
 __se_sys_execve fs/exec.c:2061 [inline]
 __x64_sys_execve+0x8e/0xa0 fs/exec.c:2061
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb90670f337
Code: Unable to access opcode bytes at RIP 0x7fb90670f30d.
RSP: 002b:00007ffd8df132e8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000562f1294bf28 RCX: 00007fb90670f337
RDX: 0000562f1294bf78 RSI: 0000562f1294bf28 RDI: 0000562f1294c000
RBP: 0000562f1294c000 R08: 0000562f1294c009 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000562f1294bf78
R13: 00007fb9068b4ff4 R14: 0000562f1294bf78 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	e8 03 80 3c 18       	callq  0x183c8008
   5:	00 74 05 e8          	add    %dh,-0x18(%rbp,%rax,1)
   9:	6b 78 94 00          	imul   $0x0,-0x6c(%rax),%edi
   d:	4d 89 7d 10          	mov    %r15,0x10(%r13)
  11:	4c 89 e8             	mov    %r13,%rax
  14:	48 c1 e8 03          	shr    $0x3,%rax
  18:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  1c:	74 08                	je     0x26
  1e:	4c 89 ef             	mov    %r13,%rdi
  21:	e8 52 78 94 00       	callq  0x947878
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	49 89 45 00          	mov    %rax,0x0(%r13) <-- trapping instruction
  2e:	49 8d 7d 24          	lea    0x24(%r13),%rdi
  32:	48 89 f8             	mov    %rdi,%rax
  35:	48 c1 e8 03          	shr    $0x3,%rax
  39:	8a 04 18             	mov    (%rax,%rbx,1),%al
  3c:	84 c0                	test   %al,%al
  3e:	0f                   	.byte 0xf
  3f:	85                   	.byte 0x85

Crashes (5402):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2021/12/11 08:02 upstream b8a98b6bf66a 49ca1f59 .config log report syz C WARNING in dev_watchdog
ci-qemu-upstream 2022/05/27 12:41 upstream 7e284070abe5 116e7a7b .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/05/25 15:16 upstream fdaf9a5840ac 647c0e27 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/05/21 12:28 upstream 3b5e1590a267 7268fa62 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/20 07:50 upstream b015dcd62b86 cb1ac2e7 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/18 00:23 upstream 42226c989789 744a39e2 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/05/15 18:53 upstream bc403203d65a 744a39e2 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-selinux-root 2022/05/15 04:45 upstream 2fe1020d73ca 744a39e2 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-smack-root 2022/05/15 03:07 upstream 2fe1020d73ca 744a39e2 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-selinux-root 2022/05/13 00:00 upstream 0ac824f379fb 9ad6612a .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/12 22:31 upstream 0ac824f379fb 9ad6612a .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/10 03:26 upstream 9be9ed2612b5 8b277b8e .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/06 05:30 upstream 0f5d752b1395 efeff0a5 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/04 21:02 upstream 107c948d1d3e dc9e5259 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/04 01:18 upstream ef8e4d3c2ab1 dc9e5259 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/05/04 00:15 upstream ef8e4d3c2ab1 dc9e5259 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/04/28 17:40 upstream 8f4dd16603ce e9076525 .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2022/04/26 15:15 upstream d615b5416f8a 1fa34c1b .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-smack-root 2022/04/25 14:56 upstream af2d861d4cd2 c889aef9 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-selinux-root 2022/04/24 20:43 upstream 22da5264abf4 131df97d .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/04/23 22:05 upstream 13bc32bad705 131df97d .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/04/23 09:01 upstream c00c5e1d157b 131df97d .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-selinux-root 2022/04/22 10:08 upstream d569e86915b7 2738b391 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce-root 2022/04/20 13:23 upstream 559089e0a93d 160a3f31 .config log report info WARNING in dev_watchdog
ci-upstream-kasan-gce 2022/03/06 21:04 upstream dcde98da9970 7bdd8b2c .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/25 23:09 upstream fdaf9a5840ac 3037caa9 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/23 21:05 upstream 4b0986a3613c 4c7657cb .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/23 17:00 upstream 4b0986a3613c 4c7657cb .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/21 12:01 upstream 3b5e1590a267 7268fa62 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/19 09:15 upstream f993aed406ea 50c53f39 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/18 15:06 upstream 210e04ff7681 50c53f39 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/16 14:07 upstream 42226c989789 744a39e2 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/05/16 02:19 upstream bc403203d65a 744a39e2 .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/04/23 10:33 upstream c00c5e1d157b 131df97d .config log report info WARNING in dev_watchdog
ci-qemu-upstream-386 2022/04/20 00:57 upstream b7f73403a3e9 7d7bc738 .config log report info WARNING in dev_watchdog
ci-qemu2-arm64-mte 2022/03/27 08:50 upstream f022814633e1 89bc8608 .config log report info WARNING in dev_watchdog
ci-qemu2-arm32 2022/03/12 16:25 upstream 68453767131a 9e8eaa75 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/25 11:17 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 647c0e27 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/25 07:24 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 647c0e27 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/24 08:50 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 e7f9308d .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/24 06:04 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 e7f9308d .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/24 04:22 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 e7f9308d .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/22 22:11 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/22 14:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/22 08:25 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/22 05:03 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/22 02:59 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/21 23:55 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/21 21:48 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/21 20:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 7268fa62 .config log report info WARNING in dev_watchdog
ci2-upstream-usb 2022/05/21 02:22 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 97fa5887cf28 bd37ad7e .config log report info WARNING in dev_watchdog
ci-upstream-linux-next-kasan-gce-root 2022/05/13 10:48 linux-next 1e1b28b936ae 9ad6612a .config log report info WARNING in dev_watchdog
ci-upstream-linux-next-kasan-gce-root 2022/04/24 18:20 linux-next f1244c81da13 131df97d .config log report info WARNING in dev_watchdog
ci-qemu-upstream 2019/12/03 08:49 upstream 76bb8b05960c ab342da3 .config log report
ci-qemu-upstream 2019/11/29 10:36 upstream 81b6b96475ac 4f7e1d0f .config log report
ci-qemu-upstream-386 2021/01/17 07:08 upstream 0da0a8a0a0e1 65a7a854 .config log report info