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| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| linux-5.15 | INFO: rcu detected stall in inet_frag_destroy | 1 | 1 | 30d | 30d | 0/3 | upstream: reported on 2026/04/25 20:23 | |||
| android-54 | BUG: soft lockup in inet_frag_destroy (2) | 1 | 1 | 433d | 433d | 0/2 | auto-obsoleted due to no activity on 2025/06/15 23:42 | |||
| android-54 | BUG: soft lockup in inet_frag_destroy | 1 | 3 | 697d | 706d | 0/2 | auto-obsoleted due to no activity on 2024/09/25 04:36 |
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 3190 jiffies s: 17769 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5638 Comm: syz.2.425 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:206
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 2f a8 01 03 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900001e0420 EFLAGS: 00000046
RAX: 0000000000000100 RBX: 0000000000000100 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff8e1ffbef R09: 1ffffffff1c3ff7d
R10: dffffc0000000000 R11: fffffbfff1c3ff7e R12: dffffc0000000000
R13: 0000000010005a98 R14: ffffffff8c653b40 R15: dffffc0000000000
FS: 00007fd849f0b6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3218af CR3: 00000000298ba000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
apic_write arch/x86/include/asm/apic.h:394 [inline]
lapic_next_event+0x5b/0x70 arch/x86/kernel/apic/apic.c:478
clockevents_program_event+0x1bc/0x310 kernel/time/clockevents.c:334
hrtimer_interrupt+0x59d/0x9c0 kernel/time/hrtimer.c:1886
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:unwind_get_return_address+0x32/0x80 arch/x86/kernel/unwind_orc.c:323
Code: 49 be 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 47 83 3b 00 74 3a 48 83 c3 48 49 89 df 49 c1 ef 03 <43> 80 3c 37 00 74 08 48 89 df e8 9f 69 9a 00 48 8b 3b e8 e7 27 1d
RSP: 0018:ffffc900001e06a8 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffc900001e0710 RCX: 0000000000000100
RDX: ffffc900001e0701 RSI: dffffc0000000000 RDI: ffffc900001e06c8
RBP: ffffc900001e0750 R08: ffffc900001e0c70 R09: ffffc900001e0718
R10: dffffc0000000000 R11: fffff5200003c0e5 R12: ffff8880253c5940
R13: ffffc900001e0af0 R14: dffffc0000000000 R15: 1ffff9200003c0e2
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1729 [inline]
slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
kmem_cache_free+0xf7/0x290 mm/slub.c:3709
kfree_skb include/linux/skbuff.h:1252 [inline]
inet_frag_rbtree_purge net/ipv4/inet_fragment.c:280 [inline]
inet_frag_destroy+0x13d/0x230 net/ipv4/inet_fragment.c:300
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215
Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 70 77 9d 0c 48 89 de 5b e9 b7 42 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 84 e8 7f 7e 65 8b 15 85 e8 7f 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc9000d766d98 EFLAGS: 00000246
RAX: ffffffff8a1ee074 RBX: ffff0a00ffffff04 RCX: 000000008a928002
RDX: ffffc9000eaa9000 RSI: 00000000000015af RDI: 00000000000015b0
RBP: ffffffff8a928082 R08: ffff8880253c5940 R09: 0000000000000012
R10: 0000000000000012 R11: 0000000000000002 R12: ffff888079c54a6c
R13: ffff888079c5466f R14: 0000000000000002 R15: dffffc0000000000
vsnprintf+0x1af4/0x1c20 lib/vsprintf.c:2755
vscnprintf+0x3d/0x80 lib/vsprintf.c:2911
bpf_verifier_vlog+0x3a/0x390 kernel/bpf/log.c:23
verbose+0x1f2/0x2b0 kernel/bpf/verifier.c:303
print_verifier_state+0x3cc/0x1fd0 kernel/bpf/verifier.c:806
do_check kernel/bpf/verifier.c:12501 [inline]
do_check_common+0x5597/0xc6d0 kernel/bpf/verifier.c:14943
do_check_main kernel/bpf/verifier.c:15006 [inline]
bpf_check+0xb08f/0x10db0 kernel/bpf/verifier.c:15583
bpf_prog_load+0x101a/0x1560 kernel/bpf/syscall.c:2651
__sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5031
__do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd848f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd849f0b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd849215fa0 RCX: 00007fd848f9ce59
RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005
RBP: 00007fd849032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd849216038 R14: 00007fd849215fa0 R15: 00007ffd83d6c3a8
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/05/22 04:59 | linux-6.1.y | c27210688955 | 70ae9b03 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan-perf | INFO: rcu detected stall in inet_frag_destroy | ||
| 2026/03/29 06:27 | linux-6.1.y | 1989cd3d56e2 | b5ceaad2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan-perf | INFO: rcu detected stall in inet_frag_destroy |