=============================
[ BUG: Invalid wait context ]
6.13.0-syzkaller-05182-ge0b1f5914274 #0 Not tainted
-----------------------------
syz.0.0/5316 is trying to lock:
ffff88801fc3aaf0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88801fc3aaf0 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0x1a0/0xaa0 drivers/char/random.c:551
other info that might help us debug this:
context-{2:2}
1 lock held by syz.0.0/5316:
#0: ffffffff8fcc3f88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcc3f88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#0: ffffffff8fcc3f88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x394/0x8d0 net/core/rtnetlink.c:3519
stack backtrace:
CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-05182-ge0b1f5914274 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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:4828 [inline]
check_wait_context kernel/locking/lockdep.c:4900 [inline]
__lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5178
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
get_random_u8+0x1bd/0xaa0 drivers/char/random.c:551
get_random_u32_below include/linux/random.h:78 [inline]
kfence_guarded_alloc+0x9c/0xcd0 mm/kfence/core.c:421
__kfence_alloc+0x344/0x370 mm/kfence/core.c:1136
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__kmalloc_cache_noprof+0x2dd/0x390 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+0x55f/0x800 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3476
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x3e1/0x780 mm/mempolicy.c:2269
stack_depot_save_flags+0x72d/0x940 lib/stackdepot.c:627
kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
task_work_add+0xd9/0x490 kernel/task_work.c:77
__run_posix_cpu_timers kernel/time/posix-cpu-timers.c:1223 [inline]
run_posix_cpu_timers+0x6ac/0x810 kernel/time/posix-cpu-timers.c:1422
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1738 [inline]
__hrtimer_run_queues+0x551/0xd30 kernel/time/hrtimer.c:1802
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1864
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_unregister_key+0x56d/0x610 kernel/locking/lockdep.c:6595
Code: 2a 94 48 c7 c6 d0 28 7b 81 e8 cf 27 0a 00 e8 9a 32 0a 00 e9 e5 fb ff ff e8 90 b5 59 0a 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 90 0f 0b 90 45 31 f6 e9 62 ff ff ff 90 0f 0b 90 e9 a1
RSP: 0018:ffffc9000d386ec0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92001a70de0 RCX: ffffffff9a400903
RDX: 0000000000000001 RSI: ffffffff8c0a9bc0 RDI: ffffffff8c602740
RBP: ffffc9000d386f98 R08: ffffffff942aa4af R09: 1ffffffff2855495
R10: dffffc0000000000 R11: fffffbfff2855496 R12: ffffc9000d386f00
R13: 1ffff92001a70ddc R14: 0000000000000000 R15: 0000000000000207
__qdisc_destroy+0x165/0x410 net/sched/sch_generic.c:1080
netdev_for_each_tx_queue include/linux/netdevice.h:2590 [inline]
dev_shutdown+0x9b/0x450 net/sched/sch_generic.c:1491
unregister_netdevice_many_notify+0xb49/0x2030 net/core/dev.c:11798
rtnl_delete_link net/core/rtnetlink.c:3485 [inline]
rtnl_dellink+0x52b/0x8d0 net/core/rtnetlink.c:3527
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:713 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:728
sock_write_iter+0x2d7/0x3f0 net/socket.c:1132
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xacf/0xd10 fs/read_write.c:679
ksys_write+0x18f/0x2b0 fs/read_write.c:731
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: 0033:0x7f15d118cd29
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:00007f15d1fec038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f15d13a5fa0 RCX: 00007f15d118cd29
RDX: 0000000000000024 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f15d120e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f15d13a5fa0 R15: 00007ffe12de8b88
----------------
Code disassembly (best guess):
0: 2a 94 48 c7 c6 d0 28 sub 0x28d0c6c7(%rax,%rcx,2),%dl
7: 7b 81 jnp 0xffffff8a
9: e8 cf 27 0a 00 call 0xa27dd
e: e8 9a 32 0a 00 call 0xa32ad
13: e9 e5 fb ff ff jmp 0xfffffbfd
18: e8 90 b5 59 0a call 0xa59b5ad
1d: 41 f7 c7 00 02 00 00 test $0x200,%r15d
24: 74 d0 je 0xfffffff6
26: fb sti
27: 45 84 f6 test %r14b,%r14b
* 2a: 75 cf jne 0xfffffffb <-- trapping instruction
2c: eb e0 jmp 0xe
2e: 90 nop
2f: 0f 0b ud2
31: 90 nop
32: 45 31 f6 xor %r14d,%r14d
35: e9 62 ff ff ff jmp 0xffffff9c
3a: 90 nop
3b: 0f 0b ud2
3d: 90 nop
3e: e9 .byte 0xe9
3f: a1 .byte 0xa1