bcachefs (loop6): reading snapshots table bcachefs (loop6): reading snapshots done ============================= [ BUG: Invalid wait context ] 6.13.0-rc3-next-20241220-syzkaller #0 Not tainted ----------------------------- syz.6.372/7652 is trying to lock: ffff88802cf465d8 (&sighand->siglock){-.-.}-{3:3}, at: __lock_task_sighand+0x149/0x2d0 kernel/signal.c:1379 other info that might help us debug this: context-{5:5} 7 locks held by syz.6.372/7652: #0: ffff888062800278 (&c->state_lock){+.+.}-{4:4}, at: bch2_fs_start+0x45/0x610 fs/bcachefs/super.c:1001 #1: ffff888062804378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline] #1: ffff888062804378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline] #1: ffff888062804378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3361 #2: ffff888078fac140 (bcachefs_btree){+.+.}-{0:0}, at: trans_set_locked fs/bcachefs/btree_locking.h:194 [inline] #2: ffff888078fac140 (bcachefs_btree){+.+.}-{0:0}, at: bch2_btree_path_traverse_all fs/bcachefs/btree_iter.c:1010 [inline] #2: ffff888078fac140 (bcachefs_btree){+.+.}-{0:0}, at: bch2_trans_begin+0xe0d/0x1d90 fs/bcachefs/btree_iter.c:3261 #3: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #3: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: bch2_check_for_deadlock+0x2a5/0x1a00 fs/bcachefs/btree_locking.c:295 #4: ffff8880121a8038 (&lock->wait_lock#2){+.+.}-{2:2}, at: bch2_check_for_deadlock+0x88c/0x1a00 fs/bcachefs/btree_locking.c:358 #5: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #5: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #5: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2365 [inline] #5: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2407 #6: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #6: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #6: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: __lock_task_sighand+0x29/0x2d0 kernel/signal.c:1362 stack backtrace: CPU: 0 UID: 0 PID: 7652 Comm: syz.6.372 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __lock_task_sighand+0x149/0x2d0 kernel/signal.c:1379 lock_task_sighand include/linux/sched/signal.h:743 [inline] do_send_sig_info kernel/signal.c:1267 [inline] group_send_sig_info+0x274/0x310 kernel/signal.c:1418 bpf_send_signal_common+0x3c4/0x630 kernel/trace/bpf_trace.c:871 ____bpf_send_signal kernel/trace/bpf_trace.c:876 [inline] bpf_send_signal+0x1d/0x30 kernel/trace/bpf_trace.c:874 bpf_prog_631417f49dd64198+0x25/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2366 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2407 trace_contention_end+0x118/0x140 include/trace/events/lock.h:122 __pv_queued_spin_lock_slowpath+0xb7e/0xdb0 kernel/locking/qspinlock.c:557 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:577 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116 bch2_check_for_deadlock+0x88c/0x1a00 fs/bcachefs/btree_locking.c:358 six_lock_slowpath+0x633/0x1680 fs/bcachefs/six.c:477 six_lock_ip_waiter+0x117/0x160 fs/bcachefs/six.c:556 __btree_node_lock_nopath fs/bcachefs/btree_locking.h:225 [inline] __bch2_btree_node_lock_write+0x10a/0x390 fs/bcachefs/btree_locking.c:418 __btree_node_lock_write fs/bcachefs/btree_locking.h:319 [inline] bch2_btree_node_lock_write fs/bcachefs/btree_locking.h:327 [inline] btree_key_cache_create fs/bcachefs/btree_key_cache.c:263 [inline] btree_key_cache_fill+0x1fe4/0x3870 fs/bcachefs/btree_key_cache.c:319 bch2_btree_path_traverse_cached+0x8b2/0xc60 fs/bcachefs/btree_key_cache.c:381 bch2_btree_path_traverse_one+0x46a/0x2920 fs/bcachefs/btree_iter.c:1166 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:249 [inline] bch2_trans_update_get_key_cache+0x6f4/0x1320 fs/bcachefs/btree_update.c:494 bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539 bch2_inode_write fs/bcachefs/inode.h:148 [inline] bch2_create_trans+0x10c7/0x1bf0 fs/bcachefs/fs-common.c:181 bch2_fs_initialize+0xffb/0x1610 fs/bcachefs/recovery.c:1182 bch2_fs_start+0x36d/0x610 fs/bcachefs/super.c:1033 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2200 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3556 do_mount fs/namespace.c:3896 [inline] __do_sys_mount fs/namespace.c:4107 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4084 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3b9d7874ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3b9e5fde68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3b9e5fdef0 RCX: 00007f3b9d7874ca RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 00007f3b9e5fdeb0 RBP: 00000000200000c0 R08: 00007f3b9e5fdef0 R09: 0000000000000010 R10: 0000000000000010 R11: 0000000000000246 R12: 0000000020000180 R13: 00007f3b9e5fdeb0 R14: 00000000000059ea R15: 0000000020000140 bcachefs (loop6): done starting filesystem netlink: 4 bytes leftover after parsing attributes in process `syz.6.372'.