============================= [ BUG: Invalid wait context ] 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0 Not tainted ----------------------------- syz.4.5980/27227 is trying to lock: ffff8880b873af60 (batched_entropy_u8.lock){-.-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b873af60 (batched_entropy_u8.lock){-.-.}-{3:3}, at: get_random_u8+0xef/0x7f0 drivers/char/random.c:551 other info that might help us debug this: context-{5:5} 2 locks held by syz.4.5980/27227: #0: ffff88808358c0a8 (&ctx->uring_lock){+.+.}-{4:4}, at: __do_sys_io_uring_enter+0xd38/0x1620 io_uring/io_uring.c:3394 #1: ffff88808358c358 (&ctx->timeout_lock){-...}-{2:2}, at: io_flush_timeouts+0x29/0x750 io_uring/timeout.c:112 stack backtrace: CPU: 1 UID: 0 PID: 27227 Comm: syz.4.5980 Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #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+0x116/0x1f0 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+0x878/0x3c40 kernel/locking/lockdep.c:5176 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] get_random_u8+0x107/0x7f0 drivers/char/random.c:551 get_random_u32_below include/linux/random.h:78 [inline] kfence_guarded_alloc mm/kfence/core.c:421 [inline] __kfence_alloc+0x4e8/0x15f0 mm/kfence/core.c:1136 kfence_alloc include/linux/kfence.h:129 [inline] slab_alloc_node mm/slub.c:4152 [inline] __kmalloc_cache_noprof+0x129/0x410 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] add_stack_record_to_list mm/page_owner.c:172 [inline] inc_stack_record_count mm/page_owner.c:214 [inline] __set_page_owner+0x34d/0x560 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269 stack_depot_save_flags+0x8aa/0x9c0 lib/stackdepot.c:627 kasan_save_stack+0x42/0x60 mm/kasan/common.c:48 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544 task_work_add+0xc0/0x3b0 kernel/task_work.c:77 io_req_normal_work_add io_uring/io_uring.c:1236 [inline] __io_req_task_work_add+0x251/0x370 io_uring/io_uring.c:1247 io_req_task_work_add io_uring/io_uring.h:149 [inline] io_req_queue_tw_complete io_uring/io_uring.h:451 [inline] io_kill_timeout io_uring/timeout.c:101 [inline] io_kill_timeout io_uring/timeout.c:88 [inline] io_flush_timeouts+0x548/0x750 io_uring/timeout.c:134 __io_commit_cqring_flush+0x46b/0x5b0 io_uring/io_uring.c:572 io_commit_cqring_flush io_uring/io_uring.h:384 [inline] __io_cq_unlock_post io_uring/io_uring.c:604 [inline] __io_submit_flush_completions+0x1001/0x1c00 io_uring/io_uring.c:1457 io_submit_flush_completions io_uring/io_uring.h:156 [inline] io_submit_state_end io_uring/io_uring.c:2219 [inline] io_submit_sqes+0xa1c/0x25c0 io_uring/io_uring.c:2337 __do_sys_io_uring_enter+0xd43/0x1620 io_uring/io_uring.c:3395 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5284785d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5285586038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f5284975fa0 RCX: 00007f5284785d29 RDX: 0000000000000000 RSI: 0000000000000db4 RDI: 0000000000000003 RBP: 00007f5284801b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5284975fa0 R15: 00007ffcd8c6ef58