syzbot


WARNING in call_timer_fn

Status: upstream: reported syz repro on 2024/02/21 03:34
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+17cefe402edee470dda4@syzkaller.appspotmail.com
First crash: 94d, last: 66d
Bug presence (2)
Date Name Commit Repro Result
2024/02/21 linux-5.15.y (ToT) 6139f2a02fe0 C [report] BUG: sleeping function called from invalid context in exit_mmap
2024/02/21 upstream (ToT) 9fc1ccccfd8d C Didn't crash
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in call_timer_fn bluetooth syz unreliable 2835 28m 556d 0/26 upstream: reported syz repro on 2022/11/16 15:25
linux-6.1 WARNING in call_timer_fn origin:lts-only C unreliable 17 5d14h 444d 0/3 upstream: reported C repro on 2023/03/08 12:11
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/03/21 17:44 10h03m fix candidate upstream job log (1)

Sample crash report:
------------[ cut here ]------------
timer: addrconf_rs_timer+0x0/0x610 net/ipv6/addrconf.c:6556 preempt leak: 00000103 -> 00000102
WARNING: CPU: 1 PID: 3537 at kernel/time/timer.c:1428 call_timer_fn+0x29a/0x560 kernel/time/timer.c:1427
Modules linked in:
CPU: 1 PID: 3537 Comm: syz-executor.2 Not tainted 5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:call_timer_fn+0x29a/0x560 kernel/time/timer.c:1427
Code: 11 00 c6 05 83 5f 61 0c 01 65 8b 0d f8 7d 93 7e 81 e1 ff ff ff 7f 48 c7 c7 40 a1 8c 8a 48 8b 74 24 18 44 89 f2 e8 a6 ed dc ff <0f> 0b eb 05 e8 cd 3b 11 00 65 8b 0d ce 7d 93 7e 89 ca 81 e2 00 00
RSP: 0018:ffffc90000dd0ba0 EFLAGS: 00010246
RAX: a5dc8daaec4e4b00 RBX: 0000000000000102 RCX: ffff888073411dc0
RDX: 0000000000000102 RSI: 0000000000000102 RDI: 0000000000000000
RBP: ffffc90000dd0c90 R08: ffffffff81665d9c R09: fffff520001ba0b5
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880733fd6f8
R13: 1ffff920001ba178 R14: 0000000000000103 R15: 00000000ffffbe01
FS:  0000555555e10480(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f6cb2d1f8 CR3: 0000000023901000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 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:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 00 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 28 73 63 0c 48 89 de 5b e9 37 df 48 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d f4 41 82 7e 65 8b 15 f5 41 82 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc90002f16fd8 EFLAGS: 00000287
RAX: ffffffff819649c3 RBX: 000000000000000c RCX: ffffc90002f170a2
RDX: ffff888073411dc0 RSI: 000000000000000c RDI: 0000000000000025
RBP: ffffc90002f17110 R08: ffffffff81964969 R09: 0000000000000004
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000020 R14: 000000000000000c R15: 0000000000000000
 bpf_bprintf_prepare+0x353/0x1310 kernel/bpf/helpers.c:791
 ____bpf_trace_printk kernel/trace/bpf_trace.c:377 [inline]
 bpf_trace_printk+0x140/0x3d0 kernel/trace/bpf_trace.c:368
 bpf_prog_cfddb232a7dfb698+0x2f/0x3e0
 bpf_dispatcher_nop_func include/linux/bpf.h:776 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
 bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1921
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 __traceiter_kmem_cache_free+0x2e/0x50 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1ce/0x1f0 mm/slub.c:3516
 merge_or_add_vmap_area mm/vmalloc.c:1142 [inline]
 free_vmap_area_noflush+0x899/0x910 mm/vmalloc.c:1759
 free_unmap_vmap_area mm/vmalloc.c:1778 [inline]
 remove_vm_area+0x1ae/0x1d0 mm/vmalloc.c:2517
 vm_remove_mappings mm/vmalloc.c:2546 [inline]
 __vunmap+0x325/0xa20 mm/vmalloc.c:2611
 __do_replace+0x8ab/0xad0 net/ipv4/netfilter/ip_tables.c:1091
 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline]
 do_ipt_set_ctl+0x2cf1/0x3e70 net/ipv4/netfilter/ip_tables.c:1628
 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101
 ip_setsockopt+0x2732/0x3fb0 net/ipv4/ip_sockglue.c:1442
 tcp_setsockopt+0x23f/0x3680 net/ipv4/tcp.c:3694
 __sys_setsockopt+0x57e/0x990 net/socket.c:2198
 __do_sys_setsockopt net/socket.c:2209 [inline]
 __se_sys_setsockopt net/socket.c:2206 [inline]
 __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2206
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5f6ca2eafa
Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 b0 ff ff ff f7
RSP: 002b:00007ffe6b75d9f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffe6b75da80 RCX: 00007f5f6ca2eafa
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000240 R09: 00007ffe6b75de37
R10: 00007f5f6cb2d1a0 R11: 0000000000000202 R12: 00007f5f6cb2d140
R13: 00007ffe6b75da1c R14: 0000000000000000 R15: 00007f5f6cb2dec0
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	0f 1f 00             	nopl   (%rax)
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	e8 17 00 00 00       	call   0x25
   e:	48 8b 3d 28 73 63 0c 	mov    0xc637328(%rip),%rdi        # 0xc63733d
  15:	48 89 de             	mov    %rbx,%rsi
  18:	5b                   	pop    %rbx
  19:	e9 37 df 48 00       	jmp    0x48df55
  1e:	cc                   	int3
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	cc                   	int3
  24:	cc                   	int3
  25:	48 8b 04 24          	mov    (%rsp),%rax
* 29:	65 48 8b 0d f4 41 82 	mov    %gs:0x7e8241f4(%rip),%rcx        # 0x7e824225 <-- trapping instruction
  30:	7e
  31:	65 8b 15 f5 41 82 7e 	mov    %gs:0x7e8241f5(%rip),%edx        # 0x7e82422d
  38:	f7 c2 00 01 ff 00    	test   $0xff0100,%edx
  3e:	74                   	.byte 0x74

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/21 03:34 linux-5.15.y 6139f2a02fe0 3af7dd65 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in call_timer_fn
2024/03/20 04:00 linux-5.15.y b95c01af2113 a485f239 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in call_timer_fn
* Struck through repros no longer work on HEAD.