====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc6-syzkaller-00133-g19e35f24750d #0 Not tainted ------------------------------------------------------ syz-executor.0/28799 is trying to acquire lock: ffff888064c9f238 (&psock->ingress_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff888064c9f238 (&psock->ingress_lock){+...}-{2:2}, at: sk_psock_stop net/core/skmsg.c:802 [inline] ffff888064c9f238 (&psock->ingress_lock){+...}-{2:2}, at: sk_psock_drop+0x2fb/0x500 net/core/skmsg.c:846 but task is already holding lock: ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: __sock_map_delete net/core/sock_map.c:417 [inline] ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: sock_map_delete_elem+0x175/0x250 net/core/sock_map.c:449 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&stab->lock){+.-.}-{2:2}: lock_acquire+0x1ed/0x550 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_map_delete net/core/sock_map.c:417 [inline] sock_map_delete_elem+0x175/0x250 net/core/sock_map.c:449 0xffffffffa000216a 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+0x2af/0x3a0 mm/slub.c:4377 sk_psock_cork_free include/linux/skmsg.h:430 [inline] sk_psock_stop+0xc5/0x110 net/core/skmsg.c:804 sock_map_close+0x1b2/0x2d0 net/core/sock_map.c:1651 inet_release+0x17d/0x200 net/ipv4/af_inet.c:437 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x429/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa1b/0x27e0 kernel/exit.c:878 do_group_exit+0x207/0x2c0 kernel/exit.c:1027 get_signal+0x16a1/0x1740 kernel/signal.c:2911 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&psock->ingress_lock){+...}-{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+0x1ed/0x550 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] sk_psock_stop net/core/skmsg.c:802 [inline] sk_psock_drop+0x2fb/0x500 net/core/skmsg.c:846 __sock_map_delete net/core/sock_map.c:423 [inline] sock_map_delete_elem+0x1a2/0x250 net/core/sock_map.c:449 bpf_prog_8a405b5ced52e191+0x4a/0x4e 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_run1+0x1e0/0x3f0 kernel/trace/bpf_trace.c:2419 trace_ext4_request_blocks include/trace/events/ext4.h:818 [inline] ext4_mb_new_blocks+0x4718/0x4bf0 fs/ext4/mballoc.c:6140 ext4_ext_map_blocks+0x1c74/0x77b0 fs/ext4/extents.c:4317 ext4_map_blocks+0xa5e/0x1d20 fs/ext4/inode.c:623 mpage_map_one_extent fs/ext4/inode.c:2163 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2216 [inline] ext4_do_writepages+0x1605/0x3d40 fs/ext4/inode.c:2679 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2768 do_writepages+0x359/0x870 mm/page-writeback.c:2612 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] filemap_write_and_wait_range+0x198/0x290 mm/filemap.c:685 ext4_punch_hole+0x1b2/0xc00 fs/ext4/inode.c:3893 ext4_fallocate+0x322/0x1ff0 fs/ext4/extents.c:4741 vfs_fallocate+0x564/0x6c0 fs/open.c:330 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_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&stab->lock); lock(&psock->ingress_lock); lock(&stab->lock); lock(&psock->ingress_lock); *** DEADLOCK *** 6 locks held by syz-executor.0/28799: #0: ffff8880424bc420 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2855 [inline] #0: ffff8880424bc420 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x4d3/0x6c0 fs/open.c:329 #1: ffff8880424beb98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1769 [inline] #1: ffff8880424beb98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1bf/0x3c0 fs/ext4/inode.c:2767 #2: ffff8880424c8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x203f/0x22a0 fs/jbd2/transaction.c:463 #3: ffff88806075e688 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x988/0x1d20 fs/ext4/inode.c:616 #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run1+0xf0/0x3f0 kernel/trace/bpf_trace.c:2419 #5: ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #5: ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: __sock_map_delete net/core/sock_map.c:417 [inline] #5: ffff88805d532200 (&stab->lock){+.-.}-{2:2}, at: sock_map_delete_elem+0x175/0x250 net/core/sock_map.c:449 stack backtrace: CPU: 1 PID: 28799 Comm: syz-executor.0 Not tainted 6.9.0-rc6-syzkaller-00133-g19e35f24750d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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+0x1ed/0x550 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] sk_psock_stop net/core/skmsg.c:802 [inline] sk_psock_drop+0x2fb/0x500 net/core/skmsg.c:846 __sock_map_delete net/core/sock_map.c:423 [inline] sock_map_delete_elem+0x1a2/0x250 net/core/sock_map.c:449 bpf_prog_8a405b5ced52e191+0x4a/0x4e 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_run1+0x1e0/0x3f0 kernel/trace/bpf_trace.c:2419 trace_ext4_request_blocks include/trace/events/ext4.h:818 [inline] ext4_mb_new_blocks+0x4718/0x4bf0 fs/ext4/mballoc.c:6140 ext4_ext_map_blocks+0x1c74/0x77b0 fs/ext4/extents.c:4317 ext4_map_blocks+0xa5e/0x1d20 fs/ext4/inode.c:623 mpage_map_one_extent fs/ext4/inode.c:2163 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2216 [inline] ext4_do_writepages+0x1605/0x3d40 fs/ext4/inode.c:2679 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2768 do_writepages+0x359/0x870 mm/page-writeback.c:2612 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] filemap_write_and_wait_range+0x198/0x290 mm/filemap.c:685 ext4_punch_hole+0x1b2/0xc00 fs/ext4/inode.c:3893 ext4_fallocate+0x322/0x1ff0 fs/ext4/extents.c:4741 vfs_fallocate+0x564/0x6c0 fs/open.c:330 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_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7eff4747dd69 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:00007eff482360c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007eff475abf80 RCX: 00007eff4747dd69 RDX: 0000000020000280 RSI: 000000004030582b RDI: 0000000000000011 RBP: 00007eff474ca49e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007eff475abf80 R15: 00007ffcb3f67cb8