[syzbot] [hams?] BUG: soft lockup in rose_loopback_timer
From: syzbot
Date: Mon Feb 03 2025 - 12:09:15 EST
Hello,
syzbot found the following issue on:
HEAD commit: 573067a5a685 Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1189ff30580000
kernel config: https://syzkaller.appspot.com/x/.config?x=cd7202b56d469648
dashboard link: https://syzkaller.appspot.com/bug?extid=7ff41b5215f0c534534e
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f4ffe8580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1663aadf980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9d3b5c855aa0/disk-573067a5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0c06fc1ead83/vmlinux-573067a5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3390e59b9e4b/Image-573067a5.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7ff41b5215f0c534534e@xxxxxxxxxxxxxxxxxxxxxxxxx
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:0]
Modules linked in:
irq event stamp: 232963
hardirqs last enabled at (232962): [<ffff80008b69c960>] __el1_irq arch/arm64/kernel/entry-common.c:565 [inline]
hardirqs last enabled at (232962): [<ffff80008b69c960>] el1_interrupt+0x58/0x68 arch/arm64/kernel/entry-common.c:575
hardirqs last disabled at (232963): [<ffff80008b69c92c>] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline]
hardirqs last disabled at (232963): [<ffff80008b69c92c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575
softirqs last enabled at (228290): [<ffff80008030e7b4>] softirq_handle_end kernel/softirq.c:407 [inline]
softirqs last enabled at (228290): [<ffff80008030e7b4>] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589
softirqs last disabled at (228401): [<ffff800080020db4>] __do_softirq+0x14/0x20 kernel/softirq.c:595
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : preempt_count arch/arm64/include/asm/preempt.h:13 [inline]
pc : in_softirq_really kernel/kcov.c:171 [inline]
pc : check_kcov_mode kernel/kcov.c:183 [inline]
pc : write_comp_data kernel/kcov.c:246 [inline]
pc : __sanitizer_cov_trace_cmp4+0x38/0xa0 kernel/kcov.c:288
lr : rose_find_socket+0x7c/0x130 net/rose/af_rose.c:309
sp : ffff800080007b60
x29: ffff800080007b70 x28: 1ffff00012f27be0 x27: 0000000000000000
x26: 00000000000003e7 x25: dfff800000000000 x24: 0000000000000033
x23: dfff800000000000 x22: 0000000000000000 x21: ffff0000c2c8e000
x20: 0000000000000033 x19: ffff0000d2670400 x18: ffff800080007840
x17: 0000000000015d97 x16: ffff80008069d55c x15: ffff700010000f54
x14: 1ffff00010000f54 x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff700010000f54 x10: 0000000000ff0100 x9 : 0000000000000302
x8 : ffff80008f9c67c0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000935a9f90 x4 : 0000000000000008 x3 : ffff80008047cdcc
x2 : 0000000000000001 x1 : 0000000000000033 x0 : 0000000000000000
Call trace:
in_softirq_really kernel/kcov.c:171 [inline] (P)
check_kcov_mode kernel/kcov.c:183 [inline] (P)
write_comp_data kernel/kcov.c:246 [inline] (P)
__sanitizer_cov_trace_cmp4+0x38/0xa0 kernel/kcov.c:288 (P)
rose_loopback_timer+0x1bc/0x4bc net/rose/rose_loopback.c:91
call_timer_fn+0x1b4/0x8b8 kernel/time/timer.c:1793
expire_timers kernel/time/timer.c:1844 [inline]
__run_timers kernel/time/timer.c:2418 [inline]
__run_timer_base+0x56c/0x7b4 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2449
handle_softirqs+0x320/0xd34 kernel/softirq.c:561
__do_softirq+0x14/0x20 kernel/softirq.c:595
____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891
do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86
invoke_softirq kernel/softirq.c:442 [inline]
__irq_exit_rcu+0x1d8/0x544 kernel/softirq.c:662
irq_exit_rcu+0x14/0x84 kernel/softirq.c:678
__el1_irq arch/arm64/kernel/entry-common.c:561 [inline]
el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:575
el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580
el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
__daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P)
arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:48 (P)
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1ec/0x4e0 kernel/sched/idle.c:325
cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:423
rest_init+0x2dc/0x2f4 init/main.c:747
start_kernel+0x3f4/0x4f4 init/main.c:1102
__primary_switched+0x8c/0x94 arch/arm64/kernel/head.S:246
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6586 Comm: syz-executor306 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x15c/0xd04 kernel/locking/qspinlock.c:380
lr : queued_spin_lock_slowpath+0x168/0xd04 kernel/locking/qspinlock.c:380
sp : ffff8000a3887920
x29: ffff8000a38879e0 x28: 1ffff00012545d44 x27: dfff800000000000
x26: 1ffff00014710f50 x25: ffff8000a3887960 x24: dfff800000000000
x23: ffff8000a38879a0 x22: ffff700014710f2c x21: 0000000000000001
x20: 1ffff00014710f34 x19: ffff800092a2ea20 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800080bf1494 x15: 0000000000000001
x14: 1ffff00012545d44 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700012545d45 x10: 1ffff00012545d44 x9 : 0000000000000000
x8 : 0000000000000001 x7 : ffff80008a73b3a4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008b6c1928
x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001
Call trace:
__cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] (P)
__cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P)
queued_spin_lock_slowpath+0x15c/0xd04 kernel/locking/qspinlock.c:380 (P)
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x2ec/0x334 kernel/locking/spinlock_debug.c:116
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline]
_raw_spin_lock_bh+0x50/0x60 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
rose_insert_socket+0x2c/0x15c net/rose/af_rose.c:261
rose_bind+0x490/0x640 net/rose/af_rose.c:753
__sys_bind_socket net/socket.c:1827 [inline]
__sys_bind+0x1ac/0x248 net/socket.c:1858
__do_sys_bind net/socket.c:1863 [inline]
__se_sys_bind net/socket.c:1861 [inline]
__arm64_sys_bind+0x7c/0x94 net/socket.c:1861
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
---
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