==================================================================
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 ffff8881d2bb31c8 by task syz-executor.1/2889
CPU: 1 PID: 2889 Comm: syz-executor.1 Tainted: G W 5.4.274-syzkaller-00016-gdd432c37afcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:183
Code: 1f 84 00 00 00 00 00 0f 1f 00 be 0c 00 00 00 48 c7 c7 a0 a7 f1 85 e8 1f de 2f 00 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 04 24 65 48 8b 0d 54 51 9e 7e 65 8b 15 59 51 9e 7e f7 c2 00
RSP: 0018:ffff8881e171e730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103c2e3cf8 RBX: ffff8881e22a1938 RCX: 1ffff1103c2e3cf4
RDX: 1ffff1103c2e3cf4 RSI: ffff8881e171e8e0 RDI: ffff8881e171e7c0
RBP: ffff8881e171e830 R08: dffffc0000000000 R09: ffff8881e171ecb0
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffffff84503c99 R15: dffffc0000000000
debug_smp_processor_id+0x5/0x20 lib/smp_processor_id.c:56
__schedule+0x9c/0x1320 kernel/sched/core.c:4235
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:4456
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4481
___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50
unwind_next_frame+0x19c2/0x1ea0 arch/x86/kernel/unwind_orc.c:603
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
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]
do_check+0x14d/0x9820 kernel/bpf/verifier.c:7798
bpf_check+0x2169/0xb340 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: 0033:0x7f96ddafff69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f96dce7a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f96ddc36f80 RCX: 00007f96ddafff69
RDX: 0000000000000080 RSI: 0000000020000600 RDI: 0000000000000005
RBP: 00007f96ddb5d6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f96ddc36f80 R15: 00007ffcab05bc98
Allocated by task 381:
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
dup_mm kernel/fork.c:1370 [inline]
copy_mm+0x169/0x10d0 kernel/fork.c:1435
copy_process+0x1291/0x3230 kernel/fork.c:2052
_do_fork+0x197/0x900 kernel/fork.c:2399
__do_sys_clone kernel/fork.c:2557 [inline]
__se_sys_clone kernel/fork.c:2538 [inline]
__x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2538
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 2854:
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
exit_mm kernel/exit.c:536 [inline]
do_exit+0xc08/0x2bc0 kernel/exit.c:846
do_group_exit+0x138/0x300 kernel/exit.c:982
get_signal+0xdb1/0x1440 kernel/signal.c:2735
do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
The buggy address belongs to the object at ffff8881d2bb2f80
which belongs to the cache mm_struct of size 1048
The buggy address is located 584 bytes inside of
1048-byte region [ffff8881d2bb2f80, ffff8881d2bb3398)
The buggy address belongs to the page:
page:ffffea00074aec00 refcount:1 mapcount:0 mapping:ffff8881f5c22f00 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c22f00
raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__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
dup_mm kernel/fork.c:1370 [inline]
copy_mm+0x169/0x10d0 kernel/fork.c:1435
copy_process+0x1291/0x3230 kernel/fork.c:2052
_do_fork+0x197/0x900 kernel/fork.c:2399
__do_sys_clone kernel/fork.c:2557 [inline]
__se_sys_clone kernel/fork.c:2538 [inline]
__x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2538
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_pages_ok+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4955 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4961
device_release+0x6b/0x190 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:716 [inline]
kobject_release lib/kobject.c:747 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e6/0x2f0 lib/kobject.c:764
netdev_run_todo+0xc44/0xdf0 net/core/dev.c:9469
tun_detach drivers/net/tun.c:766 [inline]
tun_chr_close+0xc1/0x130 drivers/net/tun.c:3558
__fput+0x262/0x680 fs/file_table.c:281
task_work_run+0x140/0x170 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xcaf/0x2bc0 kernel/exit.c:859
do_group_exit+0x138/0x300 kernel/exit.c:982
get_signal+0xdb1/0x1440 kernel/signal.c:2735
do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881d2bb3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881d2bb3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881d2bb3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881d2bb3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881d2bb3280: 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: 2889 Comm: syz-executor.1 Tainted: G B W 5.4.274-syzkaller-00016-gdd432c37afcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 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 4e 3f 00 4d 89 65 00 eb 05 e8 b7
RSP: 0018:ffff8881f6f09d60 EFLAGS: 00010007
RAX: 0000000000000003 RBX: 1ffff1103a576639 RCX: dffffc0000000000
RDX: 0000000000000102 RSI: 0000000000000008 RDI: ffff8881d2bb31c8
RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28
R13: 000000000000001f R14: 1ffff1103a576638 R15: ffff8881d2bb31c8
FS: 00007f96dce7a6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 00000001e7162000 CR4: 00000000003406a0
DR0: 0000000020000240 DR1: 0000000000000000 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:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:183
Code: 1f 84 00 00 00 00 00 0f 1f 00 be 0c 00 00 00 48 c7 c7 a0 a7 f1 85 e8 1f de 2f 00 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 04 24 65 48 8b 0d 54 51 9e 7e 65 8b 15 59 51 9e 7e f7 c2 00
RSP: 0018:ffff8881e171e730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103c2e3cf8 RBX: ffff8881e22a1938 RCX: 1ffff1103c2e3cf4
RDX: 1ffff1103c2e3cf4 RSI: ffff8881e171e8e0 RDI: ffff8881e171e7c0
RBP: ffff8881e171e830 R08: dffffc0000000000 R09: ffff8881e171ecb0
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffffff84503c99 R15: dffffc0000000000
debug_smp_processor_id+0x5/0x20 lib/smp_processor_id.c:56
__schedule+0x9c/0x1320 kernel/sched/core.c:4235
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:4456
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4481
___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50
unwind_next_frame+0x19c2/0x1ea0 arch/x86/kernel/unwind_orc.c:603
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
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]
do_check+0x14d/0x9820 kernel/bpf/verifier.c:7798
bpf_check+0x2169/0xb340 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: 0033:0x7f96ddafff69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f96dce7a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f96ddc36f80 RCX: 00007f96ddafff69
RDX: 0000000000000080 RSI: 0000000020000600 RDI: 0000000000000005
RBP: 00007f96ddb5d6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f96ddc36f80 R15: 00007ffcab05bc98
Modules linked in:
---[ end trace 8ff83bcfe804173e ]---
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 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 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 4e 3f 00 4d 89 65 00 eb 05 e8 b7
RSP: 0018:ffff8881f6f09d60 EFLAGS: 00010007
RAX: 0000000000000003 RBX: 1ffff1103a576639 RCX: dffffc0000000000
RDX: 0000000000000102 RSI: 0000000000000008 RDI: ffff8881d2bb31c8
RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28
R13: 000000000000001f R14: 1ffff1103a576638 R15: ffff8881d2bb31c8
FS: 00007f96dce7a6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 00000001e7162000 CR4: 00000000003406a0
DR0: 0000000020000240 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 00 test %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 0f 1f 00 nopl (%rax)
9: be 0c 00 00 00 mov $0xc,%esi
e: 48 c7 c7 a0 a7 f1 85 mov $0xffffffff85f1a7a0,%rdi
15: e8 1f de 2f 00 call 0x2fde39
1a: c3 ret
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
* 29: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction
2d: 65 48 8b 0d 54 51 9e mov %gs:0x7e9e5154(%rip),%rcx # 0x7e9e5189
34: 7e
35: 65 8b 15 59 51 9e 7e mov %gs:0x7e9e5159(%rip),%edx # 0x7e9e5195
3c: f7 .byte 0xf7
3d: c2 .byte 0xc2