======================================================
WARNING: possible circular locking dependency detected
6.8.0-syzkaller-05271-gf99c5f563c17 #0 Not tainted
------------------------------------------------------
syz-executor.2/9635 is trying to acquire lock:
ffff888078ebf3f0 (clock-AF_INET6){++--}-{2:2}, at: sk_psock_drop+0x34/0x500 net/core/skmsg.c:837
but task is already holding lock:
ffff888077eac820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff888077eac820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&htab->buckets[i].lock){+.-.}-{2:2}:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
0xffffffffa000213c
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+0x204/0x420 kernel/trace/bpf_trace.c:2420
trace_kfree include/trace/events/kmem.h:94 [inline]
kfree+0x291/0x380 mm/slub.c:4396
rds_send_remove_from_sock+0x66e/0x800 net/rds/send.c:666
rds_send_path_drop_acked+0x36b/0x3b0 net/rds/send.c:709
rds_tcp_write_space+0x196/0x5f0 net/rds/tcp_send.c:199
tcp_new_space net/ipv4/tcp_input.c:5626 [inline]
tcp_check_space+0x65e/0xb00 net/ipv4/tcp_input.c:5645
tcp_data_snd_check net/ipv4/tcp_input.c:5654 [inline]
tcp_rcv_established+0x10f9/0x1fd0 net/ipv4/tcp_input.c:6081
tcp_v6_do_rcv+0xa09/0x1300 net/ipv6/tcp_ipv6.c:1644
sk_backlog_rcv include/net/sock.h:1106 [inline]
__release_sock+0x1c8/0x350 net/core/sock.c:2984
release_sock+0x61/0x1f0 net/core/sock.c:3550
rds_send_xmit+0x1d3d/0x25b0 net/rds/send.c:421
rds_send_worker+0x7d/0x2b0 net/rds/threads.c:200
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
-> #0 (clock-AF_INET6){++--}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]
_raw_write_lock_bh+0x35/0x50 kernel/locking/spinlock.c:334
sk_psock_drop+0x34/0x500 net/core/skmsg.c:837
sock_hash_delete_elem+0x27e/0x300 net/core/sock_map.c:943
bpf_prog_2c29ac5cdc6b1842+0x42/0x46
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_run6+0x29f/0x4d0 kernel/trace/bpf_trace.c:2424
__bpf_trace_ext4_ext_remove_space_done+0x43/0x60 include/trace/events/ext4.h:2128
trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline]
ext4_ext_remove_space+0x4b84/0x4db0 fs/ext4/extents.c:3007
ext4_punch_hole+0x798/0xbf0 fs/ext4/inode.c:3994
ext4_fallocate+0x322/0x1fa0 fs/ext4/extents.c:4741
vfs_fallocate+0x564/0x6c0 fs/open.c:331
do_vfs_ioctl+0x2592/0x2e50 fs/ioctl.c:883
__do_sys_ioctl fs/ioctl.c:902 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:890
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&htab->buckets[i].lock);
lock(clock-AF_INET6);
lock(&htab->buckets[i].lock);
lock(clock-AF_INET6);
*** DEADLOCK ***
7 locks held by syz-executor.2/9635:
#0: ffff88805b98a420 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2853 [inline]
#0: ffff88805b98a420 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x4d3/0x6c0 fs/open.c:330
#1: ffff88805c9bf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline]
#1: ffff88805c9bf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_punch_hole+0x1dd/0xbf0 fs/ext4/inode.c:3899
#2: ffff88805c9bf3a0 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline]
#2: ffff88805c9bf3a0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_punch_hole+0x3c3/0xbf0 fs/ext4/inode.c:3946
#3: ffff88805b98e950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1faa/0x2200 fs/jbd2/transaction.c:463
#4: ffff88805c9bf088 (&ei->i_data_sem){++++}-{3:3}, at: ext4_punch_hole+0x6fb/0xbf0 fs/ext4/inode.c:3988
#5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
#5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run6+0x1b3/0x4d0 kernel/trace/bpf_trace.c:2424
#6: ffff888077eac820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
#6: ffff888077eac820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
stack backtrace:
CPU: 1 PID: 9635 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]
_raw_write_lock_bh+0x35/0x50 kernel/locking/spinlock.c:334
sk_psock_drop+0x34/0x500 net/core/skmsg.c:837
sock_hash_delete_elem+0x27e/0x300 net/core/sock_map.c:943
bpf_prog_2c29ac5cdc6b1842+0x42/0x46
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_run6+0x29f/0x4d0 kernel/trace/bpf_trace.c:2424
__bpf_trace_ext4_ext_remove_space_done+0x43/0x60 include/trace/events/ext4.h:2128
trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline]
ext4_ext_remove_space+0x4b84/0x4db0 fs/ext4/extents.c:3007
ext4_punch_hole+0x798/0xbf0 fs/ext4/inode.c:3994
ext4_fallocate+0x322/0x1fa0 fs/ext4/extents.c:4741
vfs_fallocate+0x564/0x6c0 fs/open.c:331
do_vfs_ioctl+0x2592/0x2e50 fs/ioctl.c:883
__do_sys_ioctl fs/ioctl.c:902 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:890
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f1c51c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1c517de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1c51dac050 RCX: 00007f1c51c7dea9
RDX: 0000000020000280 RSI: 000000004030582b RDI: 0000000000000009
RBP: 00007f1c51cca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f1c51dac050 R15: 00007fffca3c74e8
</TASK>