==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:870 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1514 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1749 [inline]
BUG: KASAN: use-after-free in __run_timers+0x521/0xbe0 kernel/time/timer.c:1813
Write of size 8 at addr ffff8881e6d3b1c8 by task syz-executor.2/1969
CPU: 0 PID: 1969 Comm: syz-executor.2 Tainted: G W 5.4.274-syzkaller-00002-g6f97bd951d82 #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_move_list include/linux/list.h:870 [inline]
__collect_expired_timers kernel/time/timer.c:1514 [inline]
collect_expired_timers kernel/time/timer.c:1749 [inline]
__run_timers+0x521/0xbe0 kernel/time/timer.c:1813
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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199
Code: 08 00 74 0c 48 c7 c7 90 3b eb 85 e8 75 12 43 fd 48 83 3d cd 2c 9a 01 00 74 29 48 89 df e8 e3 e7 fa fc 66 90 fb bf 01 00 00 00 66 d4 f3 fc 65 8b 05 ab 7e b1 7b 85 c0 74 02 5b c3 e8 34 45 af
RSP: 0018:ffff8881d31c70d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f6e57b40 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff8881d31c7130 R08: ffffffff81799989 R09: fffffbfff0c96e5b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f6e57b40
R13: ffff8881e59b8000 R14: dffffc0000000000 R15: 0000000000000000
finish_lock_switch kernel/sched/core.c:3347 [inline]
finish_task_switch+0x130/0x590 kernel/sched/core.c:3447
context_switch kernel/sched/core.c:3611 [inline]
__schedule+0xb0d/0x1320 kernel/sched/core.c:4307
preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:4558
retint_kernel+0x1b/0x1b
RIP: 0010:stack_trace_consume_entry+0x29/0x240 kernel/stacktrace.c:86
Code: 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 74 24 18 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 eb 88 10 00 48 8d 6b 10 <49> 89 ef 49 c1 ef 03 43 0f b6 04 37 84 c0 0f 85 39 01 00 00 48 89
RSP: 0018:ffff8881d31c7388 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8153b335 RBX: ffff8881d31c74c0 RCX: ffff8881e59b8000
RDX: 0000000000000000 RSI: ffffffff818d268b RDI: ffff8881d31c74c0
RBP: ffff8881d31c74d0 R08: dffffc0000000000 R09: ffff8881d31c7430
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e59b8000
R13: ffffffff8153b310 R14: dffffc0000000000 R15: 0000000000000000
arch_stack_walk+0x105/0x140 arch/x86/kernel/stacktrace.c:27
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_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
anon_vma_chain_free mm/rmap.c:136 [inline]
unlink_anon_vmas+0x563/0x590 mm/rmap.c:424
free_pgtables+0x12d/0x280 mm/memory.c:427
exit_mmap+0x2cb/0x520 mm/mmap.c:3192
__mmput+0x8e/0x2c0 kernel/fork.c:1101
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
ret_from_intr+0x1c/0x1c
RIP: 0033:0x7f7eec77cea9
Code: Bad RIP value.
RSP: 002b:00007f7eebaf70c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 00007f7eec8b3f80 RCX: 00007f7eec77cea9
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000004
RBP: 00007f7eec7ebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7eec8b3f80 R15: 00007ffdde5e16d8
Allocated by task 2802:
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]
__kmalloc_track_caller+0x100/0x2b0 mm/slub.c:4449
__kmalloc_reserve net/core/skbuff.c:142 [inline]
pskb_expand_head+0x10c/0x10b0 net/core/skbuff.c:1647
__bpf_try_make_writable net/core/filter.c:1635 [inline]
bpf_try_make_writable net/core/filter.c:1641 [inline]
bpf_try_make_head_writable net/core/filter.c:1649 [inline]
____bpf_clone_redirect net/core/filter.c:2145 [inline]
bpf_clone_redirect+0x110/0x350 net/core/filter.c:2123
0xffffffffa0098802
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 2820:
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]
kfree+0x123/0x370 mm/slub.c:4071
skb_release_all net/core/skbuff.c:675 [inline]
__kfree_skb net/core/skbuff.c:689 [inline]
consume_skb+0xa5/0x2a0 net/core/skbuff.c:849
tun_do_read+0x1265/0x1ec0 drivers/net/tun.c:2335
tun_chr_read_iter+0x1d0/0x2d0 drivers/net/tun.c:2355
call_read_iter include/linux/fs.h:1983 [inline]
new_sync_read fs/read_write.c:414 [inline]
__vfs_read+0x5cd/0x730 fs/read_write.c:427
vfs_read+0x148/0x360 fs/read_write.c:461
ksys_read+0x199/0x2c0 fs/read_write.c:587
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 ffff8881e6d3b000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 456 bytes inside of
512-byte region [ffff8881e6d3b000, ffff8881e6d3b200)
The buggy address belongs to the page:
page:ffffea00079b4e00 refcount:1 mapcount:0 mapping:ffff8881f5c02500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c02500
raw: 0000000000000000 0000000000100010 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 0x1d2a20(GFP_ATOMIC|__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]
__kmalloc_track_caller+0x16d/0x2b0 mm/slub.c:4449
__kmalloc_reserve net/core/skbuff.c:142 [inline]
pskb_expand_head+0x10c/0x10b0 net/core/skbuff.c:1647
__bpf_try_make_writable net/core/filter.c:1635 [inline]
bpf_try_make_writable net/core/filter.c:1641 [inline]
bpf_try_make_head_writable net/core/filter.c:1649 [inline]
____bpf_clone_redirect net/core/filter.c:2145 [inline]
bpf_clone_redirect+0x110/0x350 net/core/filter.c:2123
0xffffffffa0098802
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_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
bpf_check+0x8aaa/0xb340 kernel/bpf/verifier.c:9731
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
Memory state around the buggy address:
ffff8881e6d3b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881e6d3b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881e6d3b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881e6d3b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881e6d3b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1969 Comm: syz-executor.2 Tainted: G B W 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881e59b8000
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881e6d3b1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffcc18
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e6d3b1c0
FS: 00007f7eebaf76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000005e0e000 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: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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199
Code: 08 00 74 0c 48 c7 c7 90 3b eb 85 e8 75 12 43 fd 48 83 3d cd 2c 9a 01 00 74 29 48 89 df e8 e3 e7 fa fc 66 90 fb bf 01 00 00 00 66 d4 f3 fc 65 8b 05 ab 7e b1 7b 85 c0 74 02 5b c3 e8 34 45 af
RSP: 0018:ffff8881d31c70d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f6e57b40 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff8881d31c7130 R08: ffffffff81799989 R09: fffffbfff0c96e5b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f6e57b40
R13: ffff8881e59b8000 R14: dffffc0000000000 R15: 0000000000000000
finish_lock_switch kernel/sched/core.c:3347 [inline]
finish_task_switch+0x130/0x590 kernel/sched/core.c:3447
context_switch kernel/sched/core.c:3611 [inline]
__schedule+0xb0d/0x1320 kernel/sched/core.c:4307
preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:4558
retint_kernel+0x1b/0x1b
RIP: 0010:stack_trace_consume_entry+0x29/0x240 kernel/stacktrace.c:86
Code: 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 74 24 18 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 eb 88 10 00 48 8d 6b 10 <49> 89 ef 49 c1 ef 03 43 0f b6 04 37 84 c0 0f 85 39 01 00 00 48 89
RSP: 0018:ffff8881d31c7388 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8153b335 RBX: ffff8881d31c74c0 RCX: ffff8881e59b8000
RDX: 0000000000000000 RSI: ffffffff818d268b RDI: ffff8881d31c74c0
RBP: ffff8881d31c74d0 R08: dffffc0000000000 R09: ffff8881d31c7430
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e59b8000
R13: ffffffff8153b310 R14: dffffc0000000000 R15: 0000000000000000
arch_stack_walk+0x105/0x140 arch/x86/kernel/stacktrace.c:27
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_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
anon_vma_chain_free mm/rmap.c:136 [inline]
unlink_anon_vmas+0x563/0x590 mm/rmap.c:424
free_pgtables+0x12d/0x280 mm/memory.c:427
exit_mmap+0x2cb/0x520 mm/mmap.c:3192
__mmput+0x8e/0x2c0 kernel/fork.c:1101
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
ret_from_intr+0x1c/0x1c
RIP: 0033:0x7f7eec77cea9
Code: Bad RIP value.
RSP: 002b:00007f7eebaf70c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 00007f7eec8b3f80 RCX: 00007f7eec77cea9
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000004
RBP: 00007f7eec7ebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7eec8b3f80 R15: 00007ffdde5e16d8
Modules linked in:
CR2: 0000000000000000
---[ end trace 5fd083d7916e7ddf ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881e59b8000
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881e6d3b1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffcc18
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e6d3b1c0
FS: 00007f7eebaf76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000005e0e000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 08 00 or %al,(%rax)
2: 74 0c je 0x10
4: 48 c7 c7 90 3b eb 85 mov $0xffffffff85eb3b90,%rdi
b: e8 75 12 43 fd call 0xfd431285
10: 48 83 3d cd 2c 9a 01 cmpq $0x0,0x19a2ccd(%rip) # 0x19a2ce5
17: 00
18: 74 29 je 0x43
1a: 48 89 df mov %rbx,%rdi
1d: e8 e3 e7 fa fc call 0xfcfae805
22: 66 90 xchg %ax,%ax
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 66 d4 f3 fc call 0xfcf3d495 <-- trapping instruction
2f: 65 8b 05 ab 7e b1 7b mov %gs:0x7bb17eab(%rip),%eax # 0x7bb17ee1
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: 34 45 xor $0x45,%al
3f: af scas %es:(%rdi),%eax