==================================================================
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 ffff8881deef31c8 by task syz.2.551/2532
CPU: 1 PID: 2532 Comm: syz.2.551 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:do_user_addr_fault arch/x86/mm/fault.c:1410 [inline]
RIP: 0010:__do_page_fault+0x376/0xbb0 arch/x86/mm/fault.c:1505
Code: ff 4c 89 f6 e8 9b 8e 5c 00 48 85 c0 0f 84 e0 05 00 00 49 89 c7 48 89 c3 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 60 08 64 00 48 89 5c 24 20 48 8b 1b 48 89 df 4c
RSP: 0018:ffff8881f0e7f620 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103be746de RBX: ffff8881df3a36f0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000400000283000 RDI: 0000400001000000
RBP: 0000400000283000 R08: ffffffff81897380 R09: ffffed103ea59cd1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dae5cec0
R13: 0000000000000000 R14: 0000400000283000 R15: ffff8881df3a36f0
page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff8881f0e7f778 EFLAGS: 00050206
RAX: ffffffff822b4f01 RBX: 0000400000284c80 RCX: 0000000000001c80
RDX: 00000000000101d0 RSI: ffff8881e092e5f8 RDI: 0000400000283000
RBP: ffff8881f0e7f8d0 R08: dffffc0000000000 R09: ffffed103c12604f
R10: 0000000000000007 R11: dffffc0000000001 R12: 00007ffffffff000
R13: 00000000000101d0 R14: 0000400000274ab0 R15: ffff8881e09200a8
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:74 [inline]
copyout lib/iov_iter.c:142 [inline]
_copy_to_iter+0x2a8/0xd50 lib/iov_iter.c:600
__skb_datagram_iter+0xd8/0x740 net/core/datagram.c:429
skb_copy_datagram_iter+0x41/0x1e0 net/core/datagram.c:537
skb_copy_datagram_msg include/linux/skbuff.h:3578 [inline]
tipc_recvstream+0x8b7/0x1060 net/tipc/socket.c:1938
____sys_recvmsg net/socket.c:2538 [inline]
___sys_recvmsg+0x6a7/0xa60 net/socket.c:2579
__sys_recvmsg net/socket.c:2626 [inline]
__do_sys_recvmsg net/socket.c:2636 [inline]
__se_sys_recvmsg net/socket.c:2633 [inline]
__x64_sys_recvmsg+0x1f4/0x2c0 net/socket.c:2633
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f0116f49169
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:00007f01155b3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f0117161fa0 RCX: 00007f0116f49169
RDX: 0000000000001f00 RSI: 0000400000000500 RDI: 0000000000000013
RBP: 00007f0116fca2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0117161fa0 R15: 00007ffc3235bdf8
The buggy address belongs to the page:
page:ffffea00077bbcc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00077e9808 ffffea00077bbc88 0000000000000000
raw: ffff8881d88f2900 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
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:
ffff8881deef3080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881deef3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881deef3180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff8881deef3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881deef3280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1ed1c9067 P4D 1ed1c9067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2532 Comm: syz.2.551 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:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881dae5cec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881deef31c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbb48
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881deef31c0
FS: 00007f01155b36c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f25e3000 CR4: 00000000003406a0
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:do_user_addr_fault arch/x86/mm/fault.c:1410 [inline]
RIP: 0010:__do_page_fault+0x376/0xbb0 arch/x86/mm/fault.c:1505
Code: ff 4c 89 f6 e8 9b 8e 5c 00 48 85 c0 0f 84 e0 05 00 00 49 89 c7 48 89 c3 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 60 08 64 00 48 89 5c 24 20 48 8b 1b 48 89 df 4c
RSP: 0018:ffff8881f0e7f620 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103be746de RBX: ffff8881df3a36f0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000400000283000 RDI: 0000400001000000
RBP: 0000400000283000 R08: ffffffff81897380 R09: ffffed103ea59cd1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dae5cec0
R13: 0000000000000000 R14: 0000400000283000 R15: ffff8881df3a36f0
page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff8881f0e7f778 EFLAGS: 00050206
RAX: ffffffff822b4f01 RBX: 0000400000284c80 RCX: 0000000000001c80
RDX: 00000000000101d0 RSI: ffff8881e092e5f8 RDI: 0000400000283000
RBP: ffff8881f0e7f8d0 R08: dffffc0000000000 R09: ffffed103c12604f
R10: 0000000000000007 R11: dffffc0000000001 R12: 00007ffffffff000
R13: 00000000000101d0 R14: 0000400000274ab0 R15: ffff8881e09200a8
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:74 [inline]
copyout lib/iov_iter.c:142 [inline]
_copy_to_iter+0x2a8/0xd50 lib/iov_iter.c:600
__skb_datagram_iter+0xd8/0x740 net/core/datagram.c:429
skb_copy_datagram_iter+0x41/0x1e0 net/core/datagram.c:537
skb_copy_datagram_msg include/linux/skbuff.h:3578 [inline]
tipc_recvstream+0x8b7/0x1060 net/tipc/socket.c:1938
____sys_recvmsg net/socket.c:2538 [inline]
___sys_recvmsg+0x6a7/0xa60 net/socket.c:2579
__sys_recvmsg net/socket.c:2626 [inline]
__do_sys_recvmsg net/socket.c:2636 [inline]
__se_sys_recvmsg net/socket.c:2633 [inline]
__x64_sys_recvmsg+0x1f4/0x2c0 net/socket.c:2633
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f0116f49169
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:00007f01155b3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f0117161fa0 RCX: 00007f0116f49169
RDX: 0000000000001f00 RSI: 0000400000000500 RDI: 0000000000000013
RBP: 00007f0116fca2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0117161fa0 R15: 00007ffc3235bdf8
Modules linked in:
CR2: 0000000000000000
---[ end trace c5a71baa0b19d9f0 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881dae5cec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881deef31c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbb48
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881deef31c0
FS: 00007f01155b36c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f25e3000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: ff 4c 89 f6 decl -0xa(%rcx,%rcx,4)
4: e8 9b 8e 5c 00 call 0x5c8ea4
9: 48 85 c0 test %rax,%rax
c: 0f 84 e0 05 00 00 je 0x5f2
12: 49 89 c7 mov %rax,%r15
15: 48 89 c3 mov %rax,%rbx
18: 48 c1 e8 03 shr $0x3,%rax
1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
23: fc ff df
26: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 48 89 df mov %rbx,%rdi
2f: e8 60 08 64 00 call 0x640894
34: 48 89 5c 24 20 mov %rbx,0x20(%rsp)
39: 48 8b 1b mov (%rbx),%rbx
3c: 48 89 df mov %rbx,%rdi
3f: 4c rex.WR