------------[ cut here ]------------ WARNING: CPU: 3 PID: 5082 at drivers/rtc/rtc-mc146818-lib.c:25 mc146818_get_time+0x665/0x860 drivers/rtc/rtc-mc146818-lib.c:25 Modules linked in: CPU: 3 PID: 5082 Comm: systemd-udevd Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:mc146818_get_time+0x665/0x860 drivers/rtc/rtc-mc146818-lib.c:25 Code: eb 4e e8 4e f8 c9 fb 4c 89 e6 48 c7 c7 e0 6b b9 8b e8 3f 0c 54 03 bf 58 89 41 00 e8 a5 b3 33 fe e9 d5 f9 ff ff e8 2b f8 c9 fb <0f> 0b 48 c7 c7 e0 6b b9 8b 4c 89 e6 45 31 e4 e8 17 0c 54 03 ba 24 RSP: 0018:ffffc900005984a0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000100 RDX: ffff88801d0e9bc0 RSI: ffffffff85a8d935 RDI: 0000000000000003 RBP: ffffc90000598538 R08: 0000000000000001 R09: 0000000000000022 R10: ffffffff85a8d332 R11: 0000000000000000 R12: 0000000000000046 R13: 0000000000000022 R14: ffffc90000598650 R15: ffff888010d9e000 FS: 00007f8a2ac468c0(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00a473000 CR3: 000000001a959000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: hpet_rtc_interrupt+0x2b0/0x380 arch/x86/kernel/hpet.c:1358 __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x102/0x290 kernel/irq/handle.c:213 handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:819 run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:103 [inline] handle_irq arch/x86/kernel/irq.c:230 [inline] __common_interrupt arch/x86/kernel/irq.c:249 [inline] common_interrupt+0x96/0x200 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:620 RIP: 0010:__kernel_text_address+0x9/0x30 kernel/extable.c:105 Code: b6 c0 eb cf 48 c7 c7 44 50 a3 8d e8 41 ad 6a 00 e9 64 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 53 48 89 fb e8 07 ff ff ff <85> c0 75 17 48 81 fb 00 f0 d6 8e 72 0c 31 c0 48 81 fb b6 2a eb 8e RSP: 0018:ffffc90000598810 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffffffff8920029b RCX: 0000000000000000 RDX: 1ffff920000b3110 RSI: ffffc90000598f60 RDI: ffffffff8920029b RBP: ffffc90000598880 R08: ffffffff8e8ca086 R09: 0000000000000001 R10: 0000000000082083 R11: 0000000000000001 R12: ffffc900005988f0 R13: 0000000000000000 R14: ffff88801d0e9bc0 R15: 00000000000000e8 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429 kasan_slab_alloc include/linux/kasan.h:209 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2892 [inline] kmem_cache_alloc_node+0x1e0/0x470 mm/slub.c:2928 __alloc_skb+0x71/0x5a0 net/core/skbuff.c:198 __napi_alloc_skb+0x70/0x310 net/core/skbuff.c:520 napi_alloc_skb include/linux/skbuff.h:2876 [inline] e1000_alloc_rx_skb drivers/net/ethernet/intel/e1000/e1000_main.c:4111 [inline] e1000_copybreak drivers/net/ethernet/intel/e1000/e1000_main.c:4330 [inline] e1000_clean_rx_irq+0x7f8/0x11b0 drivers/net/ethernet/intel/e1000/e1000_main.c:4382 e1000_clean+0x957/0x1c30 drivers/net/ethernet/intel/e1000/e1000_main.c:3803 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x461/0xe10 net/core/dev.c:6888 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:lock_acquire+0x1d2/0x720 kernel/locking/lockdep.c:5410 Code: 48 c7 c7 a0 aa 4b 89 48 83 c4 20 e8 28 b8 a1 07 b8 ff ff ff ff 65 0f c1 05 ab 2a a9 7e 83 f8 01 0f 85 da 03 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffffc90000c77860 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff9200018ef0e RCX: 0000000000000001 RDX: 1ffff11003a1d4a8 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8f8667af R10: fffffbfff1f0ccf5 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888019946510 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] lockref_get_not_dead+0x14/0x80 lib/lockref.c:211 __legitimize_path+0x7f/0x1c0 fs/namei.c:617 legitimize_path fs/namei.c:627 [inline] legitimize_root+0x102/0x160 fs/namei.c:657 unlazy_walk+0x127/0x3a0 fs/namei.c:693 may_lookup fs/namei.c:1572 [inline] link_path_walk.part.0+0x7b4/0xc70 fs/namei.c:2128 link_path_walk fs/namei.c:2113 [inline] path_openat+0x25a/0x2730 fs/namei.c:3367 do_filp_open+0x17e/0x3c0 fs/namei.c:3398 do_sys_openat2+0x16d/0x420 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1192 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f8a29a909b1 Code: f7 d8 bf ff ff ff ff 64 89 02 eb cb 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 80 3f 00 74 1b be 00 08 09 00 b8 02 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1f 89 c7 e9 00 ff ff ff 48 8b 05 b1 54 2e 00 RSP: 002b:00007ffcda6cf708 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000558e00423700 RCX: 00007f8a29a909b1 RDX: 00000000000000fd RSI: 0000000000090800 RDI: 0000558e003ef0d0 RBP: 00007f8a2ac46710 R08: 0000558e0040b480 R09: 0000000000001010 R10: 00007f8a29d76b58 R11: 0000000000000202 R12: 0000000000000000 R13: 0000558e003ef0d0 R14: 00000000000000fd R15: 0000558e003ef0d0