[syzbot] [bpf?] [net?] WARNING in sock_map_unref

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13bfa699180000
kernel config: https://syzkaller.appspot.com/x/.config?x=aef2a55903e5791c
dashboard link: https://syzkaller.appspot.com/bug?extid=4b9597d9c853a4230301
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a26f4b180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17971ba1180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/089e25869df5/disk-fe46a7dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/423b1787914f/vmlinux-fe46a7dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c043e30c07d/bzImage-fe46a7dd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4b9597...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5065 at kernel/softirq.c:362 __local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Modules linked in:
CPU: 1 PID: 5065 Comm: syz-executor149 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Code: 00 e8 81 6c 0b 00 e8 4c 69 42 00 fb 65 8b 05 cc 34 b2 7e 85 c0 74 52 5b 5d c3 cc cc cc cc 65 8b 05 4e e9 b0 7e 85 c0 75 9e 90 <0f> 0b 90 eb 98 e8 73 67 42 00 eb 99 48 89 ef e8 f9 df 19 00 eb a2
RSP: 0018:ffffc900033df350 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000201 RCX: 1ffffffff1f3d467
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff88cb2222
RBP: ffffffff88cb2222 R08: 0000000000000000 R09: ffffed100fc7b64f
R10: ffff88807e3db27b R11: ffffffff81e6fb83 R12: ffff88807e3db268
R13: ffff88807e3db268 R14: ffff88807e3db268 R15: 0000000000000000
FS: 00005555732bd380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000295b2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
spin_unlock_bh include/linux/spinlock.h:396 [inline]
sock_map_del_link net/core/sock_map.c:161 [inline]
sock_map_unref+0x3b2/0x6e0 net/core/sock_map.c:180
__sock_map_delete net/core/sock_map.c:420 [inline]
sock_map_delete_elem+0xf0/0x150 net/core/sock_map.c:446
___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997
__bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:657 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420
__bpf_trace_tlb_flush+0xd2/0x110 include/trace/events/tlb.h:38
trace_tlb_flush+0xeb/0x150 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x68b/0xbc0 arch/x86/mm/tlb.c:645
unuse_temporary_mm arch/x86/kernel/alternative.c:1832 [inline]
__text_poke+0x543/0xcb0 arch/x86/kernel/alternative.c:1942
text_poke_bp_batch+0x1cd/0x760 arch/x86/kernel/alternative.c:2293
text_poke_flush arch/x86/kernel/alternative.c:2487 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2484 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2494
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
tracepoint_add_func+0xa4c/0xe50 kernel/tracepoint.c:361
tracepoint_probe_register_prio_may_exist+0xbd/0x110 kernel/tracepoint.c:482
tracepoint_probe_register_may_exist include/linux/tracepoint.h:52 [inline]
__bpf_probe_register kernel/trace/bpf_trace.c:2446 [inline]
bpf_probe_register+0x164/0x1d0 kernel/trace/bpf_trace.c:2452
bpf_raw_tp_link_attach+0x2e5/0x610 kernel/bpf/syscall.c:3836
bpf_raw_tracepoint_open kernel/bpf/syscall.c:3863 [inline]
__sys_bpf+0x3a0/0x4b40 kernel/bpf/syscall.c:5673
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7ff61e228fb9
Code: Unable to access opcode bytes at 0x7ff61e228f8f.
RSP: 002b:00007fffcfb4b8a8 EFLAGS: 00000246
ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff61e228fb9
RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000011
RBP: 0000000000000000 R08: 0000000000000140 R09: 0000000000000140
R10: 0000000000000140 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fffcfb4b8d7 R15: 000000000000000c
</TASK>


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[Tetsuo Handa]

#syz fix: bpf, sockmap: Prevent lock inversion deadlock in map delete elem