==================================================================
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 ffff8881dfeff1c8 by task syz.6.1638/6291
CPU: 1 PID: 6291 Comm: syz.6.1638 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:native_irq_enable arch/x86/include/asm/irqflags.h:54 [inline]
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:94 [inline]
RIP: 0010:do_user_addr_fault arch/x86/mm/fault.c:1341 [inline]
RIP: 0010:__do_page_fault+0x228/0xbb0 arch/x86/mm/fault.c:1505
Code: 48 89 5c 24 40 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 fc 22 34 00 48 83 e3 03 74 10 4c 89 e5 e8 8e 1f 34 00 fb bb 54 02 00 00 5e 48 8b 04 24 48 8d 98 90 00 00 00 48 89 d8 48 c1 e8 03 48 b9
RSP: 0000:ffff8881f05a7eb0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81302b72 RBX: 0000000000000254 RCX: ffff8881df7bcec0
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: 0000001b2d220000 R08: ffffffff81302b64 R09: ffffed103e0b5000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000001b2d220000
R13: 0000001b2d220000 R14: 0000000000000006 R15: ffff8881df7bcec0
page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
RIP: 0033:0x7f842ba67c9b
Code: 00 00 00 48 8d b8 c8 fe ff ff e8 50 54 0c 00 85 c0 0f 85 14 fb ff ff 48 8b 44 24 68 8b b4 24 98 00 00 00 89 30 e9 01 fb ff ff <89> 32 e9 d0 ef ff ff 48 8d 05 07 2b 23 00 48 8d 3d 70 1a e7 00 c6
RSP: 002b:00007ffd49f1ddd0 EFLAGS: 00010246
RAX: 00000000003ffde8 RBX: 0000000000000000 RCX: 00007f842bb8fda0
RDX: 0000001b2d220000 RSI: 0000000000400000 RDI: 00007f842bc9a7b0
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000001ef6e R15: 00007ffd49f1e080
Allocated by task 6264:
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+0xd9/0x250 mm/slub.c:2842
skb_clone+0x1c0/0x360 net/core/skbuff.c:1467
____bpf_clone_redirect net/core/filter.c:2136 [inline]
bpf_clone_redirect+0xa2/0x350 net/core/filter.c:2123
bpf_prog_64c90677efad4644+0x861/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
bpf_test_run+0x2ae/0x6c0 net/bpf/test_run.c:44
bpf_prog_test_run_skb+0x73c/0xf00 net/bpf/test_run.c:311
bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
__se_sys_bpf+0x2e37/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 6264:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1494 [inline]
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:3096
vti6_tnl_xmit+0xd16/0x17a0 net/ipv6/ip6_vti.c:584
__netdev_start_xmit include/linux/netdevice.h:4538 [inline]
netdev_start_xmit include/linux/netdevice.h:4552 [inline]
xmit_one net/core/dev.c:3221 [inline]
dev_hard_start_xmit+0x1b7/0x6b0 net/core/dev.c:3237
__dev_queue_xmit+0x138c/0x2790 net/core/dev.c:3821
__bpf_tx_skb net/core/filter.c:2063 [inline]
__bpf_redirect_no_mac net/core/filter.c:2097 [inline]
__bpf_redirect+0x78f/0xe20 net/core/filter.c:2120
____bpf_clone_redirect net/core/filter.c:2151 [inline]
bpf_clone_redirect+0x249/0x350 net/core/filter.c:2123
bpf_prog_64c90677efad4644+0x861/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
bpf_test_run+0x2ae/0x6c0 net/bpf/test_run.c:44
bpf_prog_test_run_skb+0x73c/0xf00 net/bpf/test_run.c:311
bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
__se_sys_bpf+0x2e37/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
The buggy address belongs to the object at ffff8881dfeff140
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 136 bytes inside of
240-byte region [ffff8881dfeff140, ffff8881dfeff230)
The buggy address belongs to the page:
page:ffffea00077fbfc0 refcount:1 mapcount:0 mapping:ffff8881f5e71b80 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5e71b80
raw: 0000000000000000 00000000000c000c 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL)
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_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x109/0x250 mm/slub.c:2842
skb_clone+0x1c0/0x360 net/core/skbuff.c:1467
____bpf_clone_redirect net/core/filter.c:2136 [inline]
bpf_clone_redirect+0xa2/0x350 net/core/filter.c:2123
bpf_prog_64c90677efad4644+0x861/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
bpf_test_run+0x2ae/0x6c0 net/bpf/test_run.c:44
bpf_prog_test_run_skb+0x73c/0xf00 net/bpf/test_run.c:311
bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
__se_sys_bpf+0x2e37/0xbcb0 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
__free_slab+0x221/0x2e0 mm/slub.c:1774
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x492/0xa00 kernel/rcu/tree.c:2167
rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
run_ksoftirqd+0x1f/0x30 kernel/softirq.c:603
smpboot_thread_fn+0x545/0x930 kernel/smpboot.c:165
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:
ffff8881dfeff080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff8881dfeff100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff8881dfeff180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881dfeff200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
ffff8881dfeff280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6291 Comm: syz.6.1638 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:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 63 51 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 a5 66 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 32 51 3f 00 4d 89 65 00 eb 05 e8 77
RSP: 0000:ffff8881f6f09d60 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 1ffff1103bfdfe39 RCX: dffffc0000000000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: ffff8881dfeff1c8
RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e20
R13: 000000000000000a R14: 1ffff1103bfdfe38 R15: ffff8881dfeff1c8
FS: 000055558253c500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d220000 CR3: 00000001ec4cb000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000400000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
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:native_irq_enable arch/x86/include/asm/irqflags.h:54 [inline]
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:94 [inline]
RIP: 0010:do_user_addr_fault arch/x86/mm/fault.c:1341 [inline]
RIP: 0010:__do_page_fault+0x228/0xbb0 arch/x86/mm/fault.c:1505
Code: 48 89 5c 24 40 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 fc 22 34 00 48 83 e3 03 74 10 4c 89 e5 e8 8e 1f 34 00 fb bb 54 02 00 00 5e 48 8b 04 24 48 8d 98 90 00 00 00 48 89 d8 48 c1 e8 03 48 b9
RSP: 0000:ffff8881f05a7eb0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81302b72 RBX: 0000000000000254 RCX: ffff8881df7bcec0
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: 0000001b2d220000 R08: ffffffff81302b64 R09: ffffed103e0b5000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000001b2d220000
R13: 0000001b2d220000 R14: 0000000000000006 R15: ffff8881df7bcec0
page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
RIP: 0033:0x7f842ba67c9b
Code: 00 00 00 48 8d b8 c8 fe ff ff e8 50 54 0c 00 85 c0 0f 85 14 fb ff ff 48 8b 44 24 68 8b b4 24 98 00 00 00 89 30 e9 01 fb ff ff <89> 32 e9 d0 ef ff ff 48 8d 05 07 2b 23 00 48 8d 3d 70 1a e7 00 c6
RSP: 002b:00007ffd49f1ddd0 EFLAGS: 00010246
RAX: 00000000003ffde8 RBX: 0000000000000000 RCX: 00007f842bb8fda0
RDX: 0000001b2d220000 RSI: 0000000000400000 RDI: 00007f842bc9a7b0
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000001ef6e R15: 00007ffd49f1e080
Modules linked in:
---[ end trace 91dc06a1f2eea472 ]---
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 63 51 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 a5 66 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 32 51 3f 00 4d 89 65 00 eb 05 e8 77
RSP: 0000:ffff8881f6f09d60 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 1ffff1103bfdfe39 RCX: dffffc0000000000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: ffff8881dfeff1c8
RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e20
R13: 000000000000000a R14: 1ffff1103bfdfe38 R15: ffff8881dfeff1c8
FS: 000055558253c500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d220000 CR3: 00000001ec4cb000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000400000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 48 89 5c 24 40 mov %rbx,0x40(%rsp)
5: 48 8b 1b mov (%rbx),%rbx
8: 48 89 de mov %rbx,%rsi
b: 48 83 e6 03 and $0x3,%rsi
f: 31 ff xor %edi,%edi
11: e8 fc 22 34 00 call 0x342312
16: 48 83 e3 03 and $0x3,%rbx
1a: 74 10 je 0x2c
1c: 4c 89 e5 mov %r12,%rbp
1f: e8 8e 1f 34 00 call 0x341fb2
24: fb sti
25: bb 54 02 00 00 mov $0x254,%ebx
* 2a: eb 5e jmp 0x8a <-- trapping instruction
2c: 48 8b 04 24 mov (%rsp),%rax
30: 48 8d 98 90 00 00 00 lea 0x90(%rax),%rbx
37: 48 89 d8 mov %rbx,%rax
3a: 48 c1 e8 03 shr $0x3,%rax
3e: 48 rex.W
3f: b9 .byte 0xb9