==================================================================
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 ffff8881d3a271c8 by task syz.6.149/969
CPU: 0 PID: 969 Comm: syz.6.149 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_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: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:compound_head include/linux/page-flags.h:176 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:463 [inline]
RIP: 0010:page_remove_rmap+0x47/0x810 mm/rmap.c:1316
Code: e8 2e c9 d5 ff 4d 8d 77 08 4d 89 f5 49 c1 ed 03 43 80 7c 25 00 00 74 08 4c 89 f7 e8 43 b3 05 00 49 8b 1e 89 de 83 e6 01 31 ff 64 cc d5 ff f6 c3 01 0f 85 d0 06 00 00 e8 f6 c8 d5 ff 4c 89 fb
RSP: 0018:ffff8881d8807558 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff818e81d2 RBX: dead000000000100 RCX: ffff8881e8e25e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff818ade82 R09: fffff94000e9e269
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffffd4000e9e269 R14: ffffea00074f1348 R15: ffffea00074f1340
zap_pte_range mm/memory.c:1105 [inline]
zap_pmd_range mm/memory.c:1222 [inline]
zap_pud_range mm/memory.c:1251 [inline]
zap_p4d_range mm/memory.c:1272 [inline]
unmap_page_range+0x10b7/0x2620 mm/memory.c:1293
unmap_single_vma mm/memory.c:1338 [inline]
unmap_vmas+0x355/0x4b0 mm/memory.c:1370
exit_mmap+0x2bc/0x520 mm/mmap.c:3191
__mmput+0x8e/0x2c0 kernel/fork.c:1101
exit_mm kernel/exit.c:538 [inline]
do_exit+0xc08/0x2bc0 kernel/exit.c:848
do_group_exit+0x138/0x300 kernel/exit.c:984
get_signal+0xdb1/0x1440 kernel/signal.c:2738
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
RIP: 0033:0x7f38422c2169
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:00007f384092c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f38424dafa8 RCX: 00007f38422c2169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f38424dafa8
RBP: 00007f38424dafa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38424dafac
R13: 0000000000000000 R14: 00007ffdda09f020 R15: 00007ffdda09f108
The buggy address belongs to the page:
page:ffffea00074e89c0 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 0x500dc0(GFP_USER|__GFP_ZERO|__GFP_ACCOUNT)
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]
__pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
pte_alloc_one+0x1b/0xb0 arch/x86/mm/pgtable.c:26
__pte_alloc+0x1d/0x1c0 mm/memory.c:440
copy_pte_range mm/memory.c:830 [inline]
copy_pmd_range mm/memory.c:906 [inline]
copy_pud_range mm/memory.c:940 [inline]
copy_p4d_range mm/memory.c:962 [inline]
copy_page_range+0x1c24/0x26f0 mm/memory.c:1024
dup_mmap kernel/fork.c:608 [inline]
dup_mm kernel/fork.c:1379 [inline]
copy_mm+0xb23/0x10d0 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_pcp_prepare mm/page_alloc.c:1233 [inline]
free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
free_unref_page_list+0x10a/0x590 mm/page_alloc.c:3154
release_pages+0xad8/0xb20 mm/swap.c:842
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:189 [inline]
tlb_flush_mmu mm/mmu_gather.c:196 [inline]
tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:277
exit_mmap+0x2dc/0x520 mm/mmap.c:3193
__mmput+0x8e/0x2c0 kernel/fork.c:1101
exit_mm kernel/exit.c:538 [inline]
do_exit+0xc08/0x2bc0 kernel/exit.c:848
do_group_exit+0x138/0x300 kernel/exit.c:984
get_signal+0xdb1/0x1440 kernel/signal.c:2738
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:
ffff8881d3a27080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881d3a27100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881d3a27180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881d3a27200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881d3a27280: 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 1d5159067 P4D 1d5159067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 969 Comm: syz.6.149 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: ffff8881e8e25e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d3a271c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa568
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d3a271c0
FS: 00007f384092c6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e1315000 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:compound_head include/linux/page-flags.h:176 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:463 [inline]
RIP: 0010:page_remove_rmap+0x47/0x810 mm/rmap.c:1316
Code: e8 2e c9 d5 ff 4d 8d 77 08 4d 89 f5 49 c1 ed 03 43 80 7c 25 00 00 74 08 4c 89 f7 e8 43 b3 05 00 49 8b 1e 89 de 83 e6 01 31 ff 64 cc d5 ff f6 c3 01 0f 85 d0 06 00 00 e8 f6 c8 d5 ff 4c 89 fb
RSP: 0018:ffff8881d8807558 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff818e81d2 RBX: dead000000000100 RCX: ffff8881e8e25e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff818ade82 R09: fffff94000e9e269
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffffd4000e9e269 R14: ffffea00074f1348 R15: ffffea00074f1340
zap_pte_range mm/memory.c:1105 [inline]
zap_pmd_range mm/memory.c:1222 [inline]
zap_pud_range mm/memory.c:1251 [inline]
zap_p4d_range mm/memory.c:1272 [inline]
unmap_page_range+0x10b7/0x2620 mm/memory.c:1293
unmap_single_vma mm/memory.c:1338 [inline]
unmap_vmas+0x355/0x4b0 mm/memory.c:1370
exit_mmap+0x2bc/0x520 mm/mmap.c:3191
__mmput+0x8e/0x2c0 kernel/fork.c:1101
exit_mm kernel/exit.c:538 [inline]
do_exit+0xc08/0x2bc0 kernel/exit.c:848
do_group_exit+0x138/0x300 kernel/exit.c:984
get_signal+0xdb1/0x1440 kernel/signal.c:2738
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
RIP: 0033:0x7f38422c2169
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:00007f384092c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f38424dafa8 RCX: 00007f38422c2169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f38424dafa8
RBP: 00007f38424dafa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38424dafac
R13: 0000000000000000 R14: 00007ffdda09f020 R15: 00007ffdda09f108
Modules linked in:
CR2: 0000000000000000
---[ end trace a4894a0b6ad16b13 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154e8ca RBX: 0000000000000101 RCX: ffff8881e8e25e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d3a271c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa568
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d3a271c0
FS: 00007f384092c6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e1315000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: e8 2e c9 d5 ff call 0xffd5c933
5: 4d 8d 77 08 lea 0x8(%r15),%r14
9: 4d 89 f5 mov %r14,%r13
c: 49 c1 ed 03 shr $0x3,%r13
10: 43 80 7c 25 00 00 cmpb $0x0,0x0(%r13,%r12,1)
16: 74 08 je 0x20
18: 4c 89 f7 mov %r14,%rdi
1b: e8 43 b3 05 00 call 0x5b363
20: 49 8b 1e mov (%r14),%rbx
23: 89 de mov %ebx,%esi
25: 83 e6 01 and $0x1,%esi
28: 31 ff xor %edi,%edi
* 2a: e8 64 cc d5 ff call 0xffd5cc93 <-- trapping instruction
2f: f6 c3 01 test $0x1,%bl
32: 0f 85 d0 06 00 00 jne 0x708
38: e8 f6 c8 d5 ff call 0xffd5c933
3d: 4c 89 fb mov %r15,%rbx