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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 | 57d | 57d | 0/3 | upstream: reported on 2026/04/25 20:23 | |||
| android-54 | BUG: soft lockup in inet_frag_destroy (2) | 1 | 1 | 461d | 461d | 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 | 724d | 733d | 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-.... } 4802 jiffies s: 228069 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: 8685 Comm: syz.5.11230 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_preemption_disabled+0x3/0x110 lib/smp_processor_id.c:13
Code: bc 8c 4c 89 f6 e8 7d 0e 0b fa e9 6e ff ff ff 00 00 cc cc 00 00 cc cc 48 c7 c7 40 1b df 8a 48 c7 c6 80 1b df 8a eb 00 55 41 57 <41> 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65
RSP: 0018:ffffc900001e0468 EFLAGS: 00000046
RAX: 1ffff11005d4ec82 RBX: c05882cde8126320 RCX: 0000000000000001
RDX: 0000000000000004 RSI: ffffffff8a8c2b20 RDI: ffffffff8adf1ba0
RBP: ffffc900001e0590 R08: ffffffff8e1ffbef R09: 1ffffffff1c3ff7d
R10: dffffc0000000000 R11: fffffbfff1c3ff7e R12: ffff88802ea764c0
R13: dffffc0000000000 R14: ffff88802ea76410 R15: 1ffff9200003c09c
FS: 00007fb1d9ed26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e423ffc CR3: 0000000076bd8000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_release+0x558/0x920 kernel/locking/lockdep.c:5684
seqcount_lockdep_reader_access+0xe0/0x1d0 include/linux/seqlock.h:103
ktime_get_update_offsets_now+0x44/0x3e0 kernel/time/timekeeping.c:2317
hrtimer_update_base kernel/time/hrtimer.c:659 [inline]
hrtimer_interrupt+0x5d9/0x9c0 kernel/time/hrtimer.c:1905
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 7f de 20 f7 65 8b 05 80 50 ca 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e08e0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 8287fadf3387ca00
RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: 0000000000000001
RBP: ffffc900001e0970 R08: ffffffff90afa3a7 R09: 1ffffffff215f474
R10: dffffc0000000000 R11: fffffbfff215f475 R12: dffffc0000000000
R13: ffff88802e2e48f8 R14: ffffffff96e74c68 R15: 1ffff9200003c11c
debug_object_activate+0x2f8/0x4f0 lib/debugobjects.c:716
debug_rcu_head_queue kernel/rcu/rcu.h:190 [inline]
call_rcu+0xa2/0x990 kernel/rcu/tree.c:2834
inet_frag_destroy+0x1b3/0x230 net/ipv4/inet_fragment.c:303
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:console_emit_next_record+0x970/0xba0 kernel/printk/printk.c:2786
Code: 0f 85 a7 00 00 00 e8 0f ac 1a 00 0f b6 5c 24 0f 4d 85 e4 75 07 e8 00 ac 1a 00 eb 06 e8 f9 ab 1a 00 fb 66 43 c7 44 3d 24 f8 f8 <43> c6 44 3d 26 f8 49 81 c6 00 06 06 06 4f 89 74 3d 14 66 43 c7 44
RSP: 0018:ffffc900062ce9c0 EFLAGS: 00000287
RAX: ffffffff8167dab7 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90012155000 RSI: 0000000000007eec RDI: 0000000000007eed
RBP: ffffc900062cebe0 R08: ffffffff90afa247 R09: 1ffffffff215f448
R10: dffffc0000000000 R11: fffffbfff215f449 R12: 0000000000000200
R13: 1ffff92000c59d44 R14: f8f8f8f8f2f2f2f8 R15: dffffc0000000000
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x4b3/0x6a0 kernel/printk/printk.c:2303
_printk+0xda/0x130 kernel/printk/printk.c:2328
validate_nla lib/nlattr.c:401 [inline]
__nla_validate_parse+0xd6d/0x2ac0 lib/nlattr.c:613
__nla_parse+0x3c/0x50 lib/nlattr.c:710
__nlmsg_parse include/net/netlink.h:744 [inline]
nlmsg_parse_deprecated include/net/netlink.h:785 [inline]
__rtnl_newlink net/core/rtnetlink.c:3492 [inline]
rtnl_newlink+0x33d/0x20a0 net/core/rtnetlink.c:3660
rtnetlink_rcv_msg+0x87c/0xfc0 net/core/rtnetlink.c:6157
netlink_rcv_skb+0x1fb/0x450 net/netlink/af_netlink.c:2511
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1872
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5be/0x970 net/socket.c:2518
___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
__sys_sendmsg net/socket.c:2601 [inline]
__do_sys_sendmsg net/socket.c:2610 [inline]
__se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
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: 0033:0x7fb1d8f9ce59
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:00007fb1d9ed2028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb1d9215fa0 RCX: 00007fb1d8f9ce59
RDX: 0000000004000040 RSI: 0000200000000940 RDI: 0000000000000008
RBP: 00007fb1d9032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb1d9216038 R14: 00007fb1d9215fa0 R15: 00007ffe57741818
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/05/27 04:42 | linux-6.1.y | dcbcab9d7079 | 2b01f00e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan-perf | INFO: rcu detected stall in inet_frag_destroy | ||
| 2026/05/22 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 |