[syzbot] [wireless?] INFO: rcu detected stall in sock_close (5)

[syzbot] [wireless?] INFO: rcu detected stall in sock_close (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    379f604cc3dc Merge tag 'pci-v6.16-fixes-3' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1690fe8c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b309c907eaab29da
dashboard link: https://syzkaller.appspot.com/bug?extid=9a29e1dba699b6f46a03
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1190fe8c580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-379f604c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/355475904f2c/vmlinux-379f604c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c247a5b19c2d/bzImage-379f604c.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a29e1dba699b6f46a03@syzkaller.appspotmail.com

watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.2011:11811]
Modules linked in:
irq event stamp: 337922703
hardirqs last  enabled at (337922702): [<ffffffff8185b0dd>] __local_bh_enable_ip+0x12d/0x1c0 kernel/softirq.c:412
hardirqs last disabled at (337922703): [<ffffffff8b6f3f4e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050
softirqs last  enabled at (584): [<ffffffff8b0f4de9>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (584): [<ffffffff8b0f4de9>] tipc_skb_peek_port net/tipc/msg.h:1235 [inline]
softirqs last  enabled at (584): [<ffffffff8b0f4de9>] tipc_sk_rcv+0x3e9/0x2ba0 net/tipc/socket.c:2489
softirqs last disabled at (586): [<ffffffff8b0f4e21>] spin_trylock_bh include/linux/spinlock.h:411 [inline]
softirqs last disabled at (586): [<ffffffff8b0f4e21>] tipc_sk_rcv+0x421/0x2ba0 net/tipc/socket.c:2494
CPU: 0 UID: 0 PID: 11811 Comm: syz.0.2011 Not tainted 6.16.0-rc5-syzkaller-00224-g379f604cc3dc #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x135/0x1c0 kernel/softirq.c:414
Code: 8b e8 6f b2 e9 09 65 66 8b 05 6f 9f 1a 11 66 85 c0 75 5a bf 01 00 00 00 e8 a8 32 0b 00 e8 b3 11 42 00 fb 65 8b 05 4b 9f 1a 11 <85> c0 75 05 e8 82 f5 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000e456540 EFLAGS: 00000286
RAX: 0000000000000201 RBX: 0000000000000201 RCX: 1216cf3644652a00
RDX: 0000000000000002 RSI: ffffffff8d998e51 RDI: ffffffff8be29e00
RBP: ffffc9000e4565d0 R08: ffffffff8fa1f5f7 R09: 1ffffffff1f43ebe
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: ffffffff8b0f4de9
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92001c8aca8
FS:  00007fa71c0906c0(0000) GS:ffff88808d21b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009000 CR3: 0000000043757000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1235 [inline]
 tipc_sk_rcv+0x3e9/0x2ba0 net/tipc/socket.c:2489
 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701
 tipc_node_xmit_skb+0xf4/0x150 net/tipc/node.c:1766
 tipc_sk_rcv+0x29c4/0x2ba0 net/tipc/socket.c:2520
 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701
 tipc_sk_push_backlog net/tipc/socket.c:1312 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2253 [inline]
 tipc_sk_filter_rcv+0x12a0/0x30b0 net/tipc/socket.c:2362
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0x8a5/0x2ba0 net/tipc/socket.c:2495
 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x2a0/0x3b0 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1a1/0x230 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1148 [inline]
 __release_sock+0x249/0x350 net/core/sock.c:3213
 release_sock+0x5f/0x1f0 net/core/sock.c:3767
 tipc_release+0x16e2/0x2160 net/tipc/socket.c:650
 __sock_release net/socket.c:647 [inline]
 sock_close+0xc3/0x240 net/socket.c:1391
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa71b18e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa71c090038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007fa71b3b5fa0 RCX: 00007fa71b18e929
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007fa71b210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa71b3b5fa0 R15: 00007fffdf037f88
 </TASK>


---
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Re: [syzbot] [bpf?] [sctp?] [tipc?] INFO: rcu detected stall in sock_close (5)

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    248951ddc14d Merge tag 'hwmon-for-v7.2-rc5' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15080ab9580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=98da55a882774dfe
dashboard link: https://syzkaller.appspot.com/bug?extid=9a29e1dba699b6f46a03
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=165d9746580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15ba2ab9580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cbba9d9c5929/disk-248951dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/84360c1cd7aa/vmlinux-248951dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c128dc7a62e1/bzImage-248951dd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9a29e1dba699b6f46a03@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5985
rcu: 	(detected by 0, t=10502 jiffies, g=18453, q=4003 ncpus=2)
task:syz.0.20        state:R  running task     stack:22176 pid:5985  tgid:5984  ppid:5819   task_flags:0x400040 flags:0x00080002
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8184
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xf7b/0x1310 kernel/rcu/tree_stall.h:680
 check_cpu_stall kernel/rcu/tree_stall.h:855 [inline]
 rcu_pending kernel/rcu/tree.c:3708 [inline]
 rcu_sched_clock_irq+0x93d/0x1050 kernel/rcu/tree.c:2744
 update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
 tick_sched_handle kernel/time/tick-sched.c:296 [inline]
 tick_nohz_handler+0x38f/0x6b0 kernel/time/tick-sched.c:317
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:2096
 hrtimer_interrupt+0x44a/0x900 kernel/time/hrtimer.c:2215
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__local_bh_enable_ip+0x1c2/0x2b0 kernel/softirq.c:307
Code: f7 89 df e8 60 01 00 00 41 f7 c4 00 02 00 00 74 05 e8 c2 9e 45 00 9c 58 a9 00 02 00 00 75 23 41 f7 c4 00 02 00 00 74 01 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 00 97 be 09 cc 90 0f 0b 90 e9 66 fe
RSP: 0018:ffffc900040ee0f0 EFLAGS: 00000206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000046
RDX: 0000000000000002 RSI: ffffffff8d883356 RDI: ffffffff8bca6680
RBP: 1ffff11005252d1e R08: ffffffff8faf8df7 R09: 1ffffffff1f5f1be
R10: dffffc0000000000 R11: fffffbfff1f5f1bf R12: 0000000000000282
R13: dffffc0000000000 R14: ffff8880292968f4 R15: 0000000000000001
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 spin_unlock_bh include/linux/spinlock_rt.h:116 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1235 [inline]
 tipc_sk_rcv+0x44d/0x2b30 net/tipc/socket.c:2495
 tipc_node_xmit+0x218/0xf10 net/tipc/node.c:1701
 tipc_node_xmit_skb+0x139/0x1b0 net/tipc/node.c:1766
 tipc_sk_rcv+0x2926/0x2b30 net/tipc/socket.c:2526
 tipc_node_xmit+0x218/0xf10 net/tipc/node.c:1701
 tipc_sk_push_backlog net/tipc/socket.c:1313 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2259 [inline]
 tipc_sk_filter_rcv+0x1811/0x3240 net/tipc/socket.c:2368
 tipc_sk_enqueue net/tipc/socket.c:2449 [inline]
 tipc_sk_rcv+0x8c4/0x2b30 net/tipc/socket.c:2501
 tipc_node_xmit+0x218/0xf10 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x2da/0x420 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1b6/0x280 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1190 [inline]
 __release_sock+0x2b2/0x3d0 net/core/sock.c:3261
 release_sock+0x1be/0x290 net/core/sock.c:3860
 tipc_release+0x1abe/0x2500 net/tipc/socket.c:651
 __sock_release net/socket.c:710 [inline]
 sock_close+0xad/0x220 net/socket.c:1501
 __fput+0x42a/0xa80 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7460e5de99
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:00007f74604be028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007f74610e5fa0 RCX: 00007f7460e5de99
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007f7460ef3eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74610e6038 R14: 00007f74610e5fa0 R15: 00007ffc753a57c8
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.