[v6.1] INFO: rcu detected stall in ieee80211_handle_queued_frames (3)
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syzbot
Nov 4, 2025, 5:16:28 PM (2 days ago) Nov 4
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f6e38ae624cf Linux 6.1.158
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160e9812580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7eb38bd5021fec61
dashboard link: https://syzkaller.appspot.com/bug?extid=b15cab4e17027c582344
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0d8305ca1c94/disk-f6e38ae6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8bc85383c07b/vmlinux-f6e38ae6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d337081bce56/bzImage-f6e38ae6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b15cab...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2642 jiffies s: 136237 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: 28155 Comm: syz.4.7632 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1081 [inline]
RIP: 0010:__sysvec_apic_timer_interrupt+0xe0/0x5a0 arch/x86/kernel/apic/apic.c:1124
Code: 06 48 8d 3c dd a8 6a 1f 8e be 08 00 00 00 e8 97 cb 9a 00 4c 0f a3 35 47 2f e9 0c 73 0d e8 18 d9 34 00 84 c0 0f 84 58 02 00 00 <e8> 2b ab e1 08 89 c3 83 f8 08 0f 83 56 02 00 00 4c 8d 34 dd 80 49
RSP: 0018:ffffc900001e0490 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0a782465a8be7c00
RDX: 0000000000000000 RSI: ffffffff8adef740 RDI: ffffffff8adef700
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f6cce3776c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f588a4a76c8 CR3: 000000005336c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
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:ieee80211_rx_h_decrypt net/mac80211/rx.c:1914 [inline]
RIP: 0010:ieee80211_rx_handlers+0x19b0/0x7490 net/mac80211/rx.c:4049
Code: 80 3c 20 00 74 08 48 89 df e8 7c 65 38 f8 48 89 5c 24 48 4c 8b 2b 4d 89 ee 49 c1 ee 03 43 0f b6 04 26 84 c0 0f 85 2e 42 00 00 <41> 0f b7 5d 00 83 e3 0c bf 0c 00 00 00 89 de e8 2c 39 e8 f7 83 fb
RSP: 0018:ffffc900001e0580 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880613b2e98 RCX: 0000000000040000
RDX: ffffc90002312000 RSI: 00000000000000d9 RDI: 00000000000000da
RBP: ffffc900001e07b0 R08: dffffc0000000000 R09: ffffed100a2e21dc
R10: ffffed100a2e21dc R11: 1ffff1100a2e21db R12: dffffc0000000000
R13: ffff88802f79203c R14: 1ffff11005ef2407 R15: ffff8880613b2dc0
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4097 [inline]
ieee80211_prepare_and_rx_handle+0x2288/0x6240 net/mac80211/rx.c:4922
__ieee80211_rx_handle_packet net/mac80211/rx.c:5144 [inline]
ieee80211_rx_list+0x2158/0x2d00 net/mac80211/rx.c:5306
ieee80211_rx_napi+0x1a6/0x3c0 net/mac80211/rx.c:5329
ieee80211_rx include/net/mac80211.h:4846 [inline]
ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:317
tasklet_action_common+0x298/0x400 kernel/softirq.c:826
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 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:preempt_schedule_irq+0xac/0x150 kernel/sched/core.c:6873
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 70 bf 01 00 00 00 e8 0f 42 37 f7 e8 4a be 66 f7 fb bf 01 00 00 00 <e8> df b9 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900035d78e0 EFLAGS: 00000282
RAX: 0a782465a8be7c00 RBX: 0000000000000000 RCX: 0a782465a8be7c00
RDX: dffffc0000000000 RSI: ffffffff8a8c0580 RDI: 0000000000000001
RBP: ffffc900035d7980 R08: ffffffff8f9f7048 R09: ffffffff8f9f7058
R10: ffffffff8f9f7050 R11: ffffffff8f9f7043 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006baf1c
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_release+0x593/0x910 kernel/locking/lockdep.c:5686
Code: 00 00 00 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 75 75 f7 44 24 50 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 66 43 c7 44 2f 09 00 00 43 c6 44 2f 0b 00
RSP: 0018:ffffc900035d7a40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: 0a782465a8be7c00
RDX: 0000000000000000 RSI: ffffffff8a8c1700 RDI: ffffffff8adef760
RBP: ffffc900035d7b50 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: ffff88802e4c6420
R13: dffffc0000000000 R14: ffff88802e4c6410 R15: 1ffff920006baf54
rcu_lock_release include/linux/rcupdate.h:355 [inline]
rcu_read_unlock include/linux/rcupdate.h:824 [inline]
xa_load+0x2bc/0x2e0 lib/xarray.c:1467
memcg_list_lru_allocated mm/list_lru.c:469 [inline]
memcg_list_lru_alloc+0x11d/0xae0 mm/list_lru.c:483
memcg_slab_pre_alloc_hook mm/slab.h:494 [inline]
slab_pre_alloc_hook+0x2b2/0x310 mm/slab.h:715
slab_alloc_node mm/slub.c:3279 [inline]
slab_alloc mm/slub.c:3367 [inline]
__kmem_cache_alloc_lru mm/slub.c:3374 [inline]
kmem_cache_alloc_lru+0x49/0x2e0 mm/slub.c:3390
alloc_inode_sb include/linux/fs.h:3245 [inline]
sock_alloc_inode+0x24/0xc0 net/socket.c:306
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063
sock_alloc net/socket.c:631 [inline]
__sock_create+0x129/0x940 net/socket.c:1514
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x232/0x540 net/socket.c:1737
__do_sys_socketpair net/socket.c:1786 [inline]
__se_sys_socketpair net/socket.c:1783 [inline]
__x64_sys_socketpair+0x97/0xb0 net/socket.c:1783
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6ccd58f6c9
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:00007f6cce377038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f6ccd7e5fa0 RCX: 00007f6ccd58f6c9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f6ccd611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ccd7e6038 R14: 00007f6ccd7e5fa0 R15: 00007ffe2b6ee7c8
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: f6e38ae624cf Linux 6.1.158
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160e9812580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7eb38bd5021fec61
dashboard link: https://syzkaller.appspot.com/bug?extid=b15cab4e17027c582344
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0d8305ca1c94/disk-f6e38ae6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8bc85383c07b/vmlinux-f6e38ae6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d337081bce56/bzImage-f6e38ae6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b15cab...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2642 jiffies s: 136237 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: 28155 Comm: syz.4.7632 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1081 [inline]
RIP: 0010:__sysvec_apic_timer_interrupt+0xe0/0x5a0 arch/x86/kernel/apic/apic.c:1124
Code: 06 48 8d 3c dd a8 6a 1f 8e be 08 00 00 00 e8 97 cb 9a 00 4c 0f a3 35 47 2f e9 0c 73 0d e8 18 d9 34 00 84 c0 0f 84 58 02 00 00 <e8> 2b ab e1 08 89 c3 83 f8 08 0f 83 56 02 00 00 4c 8d 34 dd 80 49
RSP: 0018:ffffc900001e0490 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0a782465a8be7c00
RDX: 0000000000000000 RSI: ffffffff8adef740 RDI: ffffffff8adef700
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f6cce3776c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f588a4a76c8 CR3: 000000005336c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
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:ieee80211_rx_h_decrypt net/mac80211/rx.c:1914 [inline]
RIP: 0010:ieee80211_rx_handlers+0x19b0/0x7490 net/mac80211/rx.c:4049
Code: 80 3c 20 00 74 08 48 89 df e8 7c 65 38 f8 48 89 5c 24 48 4c 8b 2b 4d 89 ee 49 c1 ee 03 43 0f b6 04 26 84 c0 0f 85 2e 42 00 00 <41> 0f b7 5d 00 83 e3 0c bf 0c 00 00 00 89 de e8 2c 39 e8 f7 83 fb
RSP: 0018:ffffc900001e0580 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880613b2e98 RCX: 0000000000040000
RDX: ffffc90002312000 RSI: 00000000000000d9 RDI: 00000000000000da
RBP: ffffc900001e07b0 R08: dffffc0000000000 R09: ffffed100a2e21dc
R10: ffffed100a2e21dc R11: 1ffff1100a2e21db R12: dffffc0000000000
R13: ffff88802f79203c R14: 1ffff11005ef2407 R15: ffff8880613b2dc0
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4097 [inline]
ieee80211_prepare_and_rx_handle+0x2288/0x6240 net/mac80211/rx.c:4922
__ieee80211_rx_handle_packet net/mac80211/rx.c:5144 [inline]
ieee80211_rx_list+0x2158/0x2d00 net/mac80211/rx.c:5306
ieee80211_rx_napi+0x1a6/0x3c0 net/mac80211/rx.c:5329
ieee80211_rx include/net/mac80211.h:4846 [inline]
ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:317
tasklet_action_common+0x298/0x400 kernel/softirq.c:826
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 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:preempt_schedule_irq+0xac/0x150 kernel/sched/core.c:6873
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 70 bf 01 00 00 00 e8 0f 42 37 f7 e8 4a be 66 f7 fb bf 01 00 00 00 <e8> df b9 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900035d78e0 EFLAGS: 00000282
RAX: 0a782465a8be7c00 RBX: 0000000000000000 RCX: 0a782465a8be7c00
RDX: dffffc0000000000 RSI: ffffffff8a8c0580 RDI: 0000000000000001
RBP: ffffc900035d7980 R08: ffffffff8f9f7048 R09: ffffffff8f9f7058
R10: ffffffff8f9f7050 R11: ffffffff8f9f7043 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006baf1c
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_release+0x593/0x910 kernel/locking/lockdep.c:5686
Code: 00 00 00 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 75 75 f7 44 24 50 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 66 43 c7 44 2f 09 00 00 43 c6 44 2f 0b 00
RSP: 0018:ffffc900035d7a40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: 0a782465a8be7c00
RDX: 0000000000000000 RSI: ffffffff8a8c1700 RDI: ffffffff8adef760
RBP: ffffc900035d7b50 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: ffff88802e4c6420
R13: dffffc0000000000 R14: ffff88802e4c6410 R15: 1ffff920006baf54
rcu_lock_release include/linux/rcupdate.h:355 [inline]
rcu_read_unlock include/linux/rcupdate.h:824 [inline]
xa_load+0x2bc/0x2e0 lib/xarray.c:1467
memcg_list_lru_allocated mm/list_lru.c:469 [inline]
memcg_list_lru_alloc+0x11d/0xae0 mm/list_lru.c:483
memcg_slab_pre_alloc_hook mm/slab.h:494 [inline]
slab_pre_alloc_hook+0x2b2/0x310 mm/slab.h:715
slab_alloc_node mm/slub.c:3279 [inline]
slab_alloc mm/slub.c:3367 [inline]
__kmem_cache_alloc_lru mm/slub.c:3374 [inline]
kmem_cache_alloc_lru+0x49/0x2e0 mm/slub.c:3390
alloc_inode_sb include/linux/fs.h:3245 [inline]
sock_alloc_inode+0x24/0xc0 net/socket.c:306
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063
sock_alloc net/socket.c:631 [inline]
__sock_create+0x129/0x940 net/socket.c:1514
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x232/0x540 net/socket.c:1737
__do_sys_socketpair net/socket.c:1786 [inline]
__se_sys_socketpair net/socket.c:1783 [inline]
__x64_sys_socketpair+0x97/0xb0 net/socket.c:1783
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6ccd58f6c9
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:00007f6cce377038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f6ccd7e5fa0 RCX: 00007f6ccd58f6c9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f6ccd611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ccd7e6038 R14: 00007f6ccd7e5fa0 R15: 00007ffe2b6ee7c8
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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