syzbot

 sign-in | mailing list | source | docs
🐞 Open [106]
🐞 Fixed [1]
🐞 Invalid [166]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

WARNING in tcp_retransmit_timer

Status: public: reported C repro on 2019/09/10 12:00
Reported-by: syzbot+c495217ceabb212ffa88@syzkaller.appspotmail.com
First crash: 1901d, last: 1890d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in tcp_retransmit_timer net C unreliable 8 762d 850d 0/28 closed as invalid on 2022/11/15 19:19
linux-4.14 WARNING in tcp_retransmit_timer C done 215 1890d 1901d 1/1 fixed on 2019/12/09 13:28
upstream WARNING in tcp_retransmit_timer (2) net syz inconclusive 1 494d 728d 0/28 closed as invalid on 2023/10/27 14:39

Sample crash report:
audit: type=1400 audit(1568159662.406:7): avc:  denied  { map } for  pid=1789 comm="syz-executor508" path="/root/syz-executor508071515" dev="sda1" ino=16461 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.143+ #0
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1ea/0x3d3 kernel/panic.c:182
 __warn.cold+0x2f/0x3a kernel/panic.c:546
 report_bug+0x20a/0x248 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+0x1bf/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429
RSP: 0018:ffff8881db807c78 EFLAGS: 00010206
RAX: ffffffff92430d40 RBX: ffff8881cfa28000 RCX: 0000000000000001
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881cd7294c8
RBP: ffff8881cd728b00 R08: ffff88821ffff01c R09: ffff88821ffff008
R10: ffff88821ffff017 R11: ffff88821ffff010 R12: ffff8881cd72919a
R13: ffff8881cd728b30 R14: 0000000000000000 R15: ffff8881cd72930c
 tcp_write_timer_handler+0x43d/0x780 net/ipv4/tcp_timer.c:579
 tcp_write_timer+0xc9/0x170 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1634 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1647
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:native_safe_halt+0x13/0x20 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffffffff92407d48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: ffffffff9282eba8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff9243156c
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff92430d40 R15: dffffc0000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
 default_idle+0x61/0x3b0 arch/x86/kernel/process.c:566
 cpuidle_idle_call kernel/sched/idle.c:159 [inline]
 do_idle+0x2e6/0x390 kernel/sched/idle.c:268
 cpu_startup_entry+0xc6/0xd0 kernel/sched/idle.c:374
 start_kernel+0x858/0x890 init/main.c:733
 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Kernel Offset: 0xf000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..

Crashes (478):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/10 23:57 android-4.14 f02af7b02c26 a60cb4cd .config console log report syz C ci-android-414-kasan-gce-root
2019/09/10 21:18 android-4.14 f02af7b02c26 a60cb4cd .config console log report syz ci-android-414-kasan-gce-root
2019/09/10 14:28 android-4.14 f02af7b02c26 a60cb4cd .config console log report syz ci-android-414-kasan-gce-root
2019/09/21 18:01 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 16:57 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 14:59 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 13:44 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 13:16 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 11:23 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 09:44 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 06:55 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 05:31 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 04:29 android-4.14 a9e9acce73d4 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 03:10 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 00:57 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/21 00:02 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 22:35 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 18:24 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 16:07 android-4.14 61a760424681 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 14:46 android-4.14 290dd9dfcbe8 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 10:41 android-4.14 290dd9dfcbe8 d96e88f3 .config console log report ci-android-414-kasan-gce-root
2019/09/20 09:39 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/20 08:26 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/20 06:14 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/20 06:12 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/20 04:23 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/20 00:16 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/19 22:13 android-4.14 290dd9dfcbe8 4d3ae0b7 .config console log report ci-android-414-kasan-gce-root
2019/09/19 19:25 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 17:55 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 15:21 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 15:02 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 13:52 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 12:49 android-4.14 290dd9dfcbe8 eb940044 .config console log report ci-android-414-kasan-gce-root
2019/09/19 07:24 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/19 06:03 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/19 03:50 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/19 02:45 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/19 01:07 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/19 00:01 android-4.14 6bb0e9159cb6 46c0be24 .config console log report ci-android-414-kasan-gce-root
2019/09/18 22:09 android-4.14 6bb0e9159cb6 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 19:50 android-4.14 6bb0e9159cb6 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 17:30 android-4.14 6bb0e9159cb6 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 16:21 android-4.14 ca30356b2a26 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 15:14 android-4.14 ca30356b2a26 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 14:02 android-4.14 ca30356b2a26 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/18 12:15 android-4.14 ca30356b2a26 c2dcd700 .config console log report ci-android-414-kasan-gce-root
2019/09/10 11:53 android-4.14 f02af7b02c26 a60cb4cd .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.