==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:791 [inline]
BUG: KASAN: use-after-free in detach_timer kernel/time/timer.c:824 [inline]
BUG: KASAN: use-after-free in expire_timers kernel/time/timer.c:1482 [inline]
BUG: KASAN: use-after-free in __run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
Write of size 8 at addr ffff8881e99031c8 by task syz.4.490/2161
CPU: 0 PID: 2161 Comm: syz.4.490 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
__hlist_del include/linux/list.h:791 [inline]
detach_timer kernel/time/timer.c:824 [inline]
expire_timers kernel/time/timer.c:1482 [inline]
__run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:539 [inline]
smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:deref_stack_reg+0x15c/0x1f0 arch/x86/kernel/unwind_orc.c:350
Code: 00 00 00 00 fc ff df 42 80 3c 23 00 74 08 4c 89 f7 e8 68 57 64 00 48 c7 44 24 40 00 00 00 00 4c 89 ff 4c 89 f6 e8 24 09 00 00 <42> 80 3c 23 00 74 08 4c 89 f7 e8 c5 56 64 00 4c 8b 74 24 40 48 8b
RSP: 0018:ffff8881e8c96600 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8881e8c96c30 RBX: 1ffff1103d192cc8 RCX: dffffc0000000000
RDX: ffff8881e8c96b00 RSI: ffff8881e8c96640 RDI: ffff8881e8c96b50
RBP: ffff8881e8c966b0 R08: dffffc0000000000 R09: ffff8881e8c96b10
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1103d192cc4 R14: ffff8881e8c96640 R15: ffff8881e8c96b50
unwind_next_frame+0x1681/0x1ea0 arch/x86/kernel/unwind_orc.c:579
__unwind_start+0x708/0x890 arch/x86/kernel/unwind_orc.c:691
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xdd/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc_trace+0xdc/0x260 mm/slub.c:2854
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:690 [inline]
copy_verifier_state+0x581/0xbf0 kernel/bpf/verifier.c:746
push_stack+0x153/0x470 kernel/bpf/verifier.c:819
check_cond_jmp_op+0x719/0x17d0 kernel/bpf/verifier.c:6192
do_check+0x4ba1/0x9820 kernel/bpf/verifier.c:8109
bpf_check+0x2183/0xb3e0 kernel/bpf/verifier.c:9637
bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fdd31a23169
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:00007fdd3008d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fdd31c3bfa0 RCX: 00007fdd31a23169
RDX: 000000000000006f RSI: 0000400000000440 RDI: 0000000000000005
RBP: 00007fdd31aa42a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd31c3bfa0 R15: 00007ffc1194b238
The buggy address belongs to the page:
page:ffffea0007a640c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
__alloc_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
pcpu_alloc_pages mm/percpu-vm.c:94 [inline]
pcpu_populate_chunk+0x1bb/0xd00 mm/percpu-vm.c:284
pcpu_alloc+0x79e/0x1050 mm/percpu.c:1714
prealloc_init+0x238/0x800 kernel/bpf/hashtab.c:154
htab_map_alloc+0x638/0x930 kernel/bpf/hashtab.c:385
find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
map_create kernel/bpf/syscall.c:573 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
__se_sys_bpf+0x3291/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
free_pcp_prepare mm/page_alloc.c:1233 [inline]
free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
free_unref_page mm/page_alloc.c:3134 [inline]
free_the_page mm/page_alloc.c:4953 [inline]
__free_pages+0xaf/0x140 mm/page_alloc.c:4961
pcpu_free_pages mm/percpu-vm.c:64 [inline]
pcpu_depopulate_chunk mm/percpu-vm.c:328 [inline]
pcpu_balance_workfn+0x940/0x1450 mm/percpu.c:1865
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Memory state around the buggy address:
ffff8881e9903080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e9903100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881e9903180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881e9903200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e9903280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e933f067 P4D 1e933f067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2161 Comm: syz.4.490 Tainted: G B 5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154e8ca RBX: 0000000000000101 RCX: ffff8881ecd46e40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e99031c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa440
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e99031c0
FS: 00007fdd3008d6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e72a4000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x879/0xbe0 kernel/time/timer.c:1817
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:539 [inline]
smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:deref_stack_reg+0x15c/0x1f0 arch/x86/kernel/unwind_orc.c:350
Code: 00 00 00 00 fc ff df 42 80 3c 23 00 74 08 4c 89 f7 e8 68 57 64 00 48 c7 44 24 40 00 00 00 00 4c 89 ff 4c 89 f6 e8 24 09 00 00 <42> 80 3c 23 00 74 08 4c 89 f7 e8 c5 56 64 00 4c 8b 74 24 40 48 8b
RSP: 0018:ffff8881e8c96600 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8881e8c96c30 RBX: 1ffff1103d192cc8 RCX: dffffc0000000000
RDX: ffff8881e8c96b00 RSI: ffff8881e8c96640 RDI: ffff8881e8c96b50
RBP: ffff8881e8c966b0 R08: dffffc0000000000 R09: ffff8881e8c96b10
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1103d192cc4 R14: ffff8881e8c96640 R15: ffff8881e8c96b50
unwind_next_frame+0x1681/0x1ea0 arch/x86/kernel/unwind_orc.c:579
__unwind_start+0x708/0x890 arch/x86/kernel/unwind_orc.c:691
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xdd/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc_trace+0xdc/0x260 mm/slub.c:2854
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:690 [inline]
copy_verifier_state+0x581/0xbf0 kernel/bpf/verifier.c:746
push_stack+0x153/0x470 kernel/bpf/verifier.c:819
check_cond_jmp_op+0x719/0x17d0 kernel/bpf/verifier.c:6192
do_check+0x4ba1/0x9820 kernel/bpf/verifier.c:8109
bpf_check+0x2183/0xb3e0 kernel/bpf/verifier.c:9637
bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fdd31a23169
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:00007fdd3008d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fdd31c3bfa0 RCX: 00007fdd31a23169
RDX: 000000000000006f RSI: 0000400000000440 RDI: 0000000000000005
RBP: 00007fdd31aa42a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd31c3bfa0 R15: 00007ffc1194b238
Modules linked in:
CR2: 0000000000000000
---[ end trace 5116166b2f275584 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154e8ca RBX: 0000000000000101 RCX: ffff8881ecd46e40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e99031c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa440
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e99031c0
FS: 00007fdd3008d6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e72a4000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess), 6 bytes skipped:
0: df 42 80 filds -0x80(%rdx)
3: 3c 23 cmp $0x23,%al
5: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1)
9: 89 f7 mov %esi,%edi
b: e8 68 57 64 00 call 0x645778
10: 48 c7 44 24 40 00 00 movq $0x0,0x40(%rsp)
17: 00 00
19: 4c 89 ff mov %r15,%rdi
1c: 4c 89 f6 mov %r14,%rsi
1f: e8 24 09 00 00 call 0x948
* 24: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1) <-- trapping instruction
29: 74 08 je 0x33
2b: 4c 89 f7 mov %r14,%rdi
2e: e8 c5 56 64 00 call 0x6456f8
33: 4c 8b 74 24 40 mov 0x40(%rsp),%r14
38: 48 rex.W
39: 8b .byte 0x8b