[Android 5.15] BUG: soft lockup in kauditd_thread

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Apr 4, 2024, 4:01:33 PMApr 4
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Hello,

syzbot found the following issue on:

HEAD commit: 993bed180178 Merge "Merge branch 'android13-5.15' into bra..
git tree: android13-5.15-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=134fa1a1180000
kernel config: https://syzkaller.appspot.com/x/.config?x=49ce29477ba81e8f
dashboard link: https://syzkaller.appspot.com/bug?extid=1d10c0fe139063cb6d1c
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1194e2a9180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12869ead180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4098d24d4c8b/disk-993bed18.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/94fbc07ac02d/vmlinux-993bed18.xz
kernel image: https://storage.googleapis.com/syzbot-assets/eed14de06c19/bzImage-993bed18.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1d10c0...@syzkaller.appspotmail.com

kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [kauditd:30]
Modules linked in:
CPU: 0 PID: 30 Comm: kauditd Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 5b 03 f3 03 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc900001ff5c0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff9200003febc RCX: ffffffff8154f88f
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88810a0fa528
RBP: ffffc900001ff670 R08: dffffc0000000000 R09: ffffed102141f4a6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88810a0fa528 R14: 0000000000000003 R15: 1ffff9200003fec0
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003ff6 CR3: 000000010c4cf000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
_raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
__sock_map_delete net/core/sock_map.c:416 [inline]
sock_map_delete_elem+0x99/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0xe14
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:625 [inline]
bpf_prog_run include/linux/filter.h:632 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1920
__bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x1f3/0x220 mm/slub.c:4569
sk_psock_free_link include/linux/skmsg.h:420 [inline]
sock_map_del_link net/core/sock_map.c:160 [inline]
sock_map_unref+0x352/0x4d0 net/core/sock_map.c:182
__sock_map_delete net/core/sock_map.c:422 [inline]
sock_map_delete_elem+0xc1/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0xe14
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:625 [inline]
bpf_prog_run include/linux/filter.h:632 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1920
__bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x1f3/0x220 mm/slub.c:4569
skb_free_head net/core/skbuff.c:656 [inline]
skb_release_data+0x8a9/0xa80 net/core/skbuff.c:678
skb_release_all net/core/skbuff.c:743 [inline]
__kfree_skb net/core/skbuff.c:757 [inline]
kfree_skb_reason net/core/skbuff.c:778 [inline]
kfree_skb+0xba/0x360 net/core/skbuff.c:792
kauditd_hold_skb+0x115/0x200 kernel/audit.c:603
kauditd_send_queue+0x28d/0x2e0 kernel/audit.c:758
kauditd_thread+0x529/0x8b0 kernel/audit.c:882
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>


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