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

[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 output: https://syzkaller.appspot.com/x/log.txt?x=17934ffa180000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7
dashboard link: https://syzkaller.appspot.com/bug?extid=1c04a1e4ae355870dc7a
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=111b2e86180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e86649180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0f7abe4afac7/disk-fe46a7dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/82598d09246c/vmlinux-fe46a7dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/efa23788c875/bzImage-fe46a7dd.xz

The issue was bisected to:

commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.r...@arm.com>
Date: Mon Jan 11 15:37:07 2021 +0000

lockdep: report broken irq restoration

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=133d8711180000
final oops: https://syzkaller.appspot.com/x/report.txt?x=10bd8711180000
console output: https://syzkaller.appspot.com/x/log.txt?x=173d8711180000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1c04a1...@syzkaller.appspotmail.com
Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration")

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5069 at kernel/softirq.c:362 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:362
Modules linked in:
CPU: 0 PID: 5069 Comm: syz-executor295 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:__local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:362
Code: 3b 44 24 60 75 52 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b3 da 25 0a 90 0f 0b 90 e9 ca fe ff ff e8 55 00 00 00 eb 9c 90 <0f> 0b 90 e9 fa fe ff ff 48 c7 c1 9c 6d 87 8f 80 e1 07 80 c1 03 38
RSP: 0018:ffffc9000415f5a0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 1ffff9200082beb8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff89642276
RBP: ffffc9000415f660 R08: ffff88807869900b R09: 1ffff1100f0d3201
R10: dffffc0000000000 R11: ffffed100f0d3202 R12: dffffc0000000000
R13: 0000000000000004 R14: ffffc9000415f5e0 R15: 0000000000000201
FS: 000055556fdeb3c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2728b8a9f0 CR3: 000000002d9ee000 CR4: 0000000000350ef0
Call Trace:
<TASK>
spin_unlock_bh include/linux/spinlock.h:396 [inline]
sock_hash_delete_elem+0x1a6/0x300 net/core/sock_map.c:947
bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
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+0x206/0x420 kernel/trace/bpf_trace.c:2420
__traceiter_kfree+0x2d/0x50 include/trace/events/kmem.h:94
trace_kfree include/trace/events/kmem.h:94 [inline]
kfree+0x291/0x380 mm/slub.c:4377
put_css_set_locked+0x6e4/0x940 kernel/cgroup/cgroup.c:951
cgroup_migrate_finish+0x1bb/0x380 kernel/cgroup/cgroup.c:2691
cgroup_attach_task+0x7ef/0xac0 kernel/cgroup/cgroup.c:2890
__cgroup1_procs_write+0x2e4/0x430 kernel/cgroup/cgroup-v1.c:522
cgroup_file_write+0x2d0/0x6d0 kernel/cgroup/cgroup.c:4092
kernfs_fop_write_iter+0x3a6/0x500 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:2108 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa86/0xcb0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xfd/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f2728bca840
Code: 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 61 a8 08 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffeba5eea08 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f2728bca840
RDX: 0000000000000001 RSI: 00007ffeba5eea30 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000001 R09: 00007ffeba5ee837
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffeba5eea30
R13: 00007ffeba5eef70 R14: 0000000000000001 R15: 00007ffeba5eefb0
</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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

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.

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

[Tetsuo Handa]

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