==================================================================
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:1452 [inline]
BUG: KASAN: use-after-free in __run_timers+0x7be/0xbe0 kernel/time/timer.c:1787
Write of size 8 at addr ffff8881ed68f1c8 by task syz-executor.3/14988
CPU: 0 PID: 14988 Comm: syz-executor.3 Tainted: G W 5.4.268-syzkaller-00012-g51cf29fc2bfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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:1452 [inline]
__run_timers+0x7be/0xbe0 kernel/time/timer.c:1787
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1800
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086
The buggy address belongs to the page:
page:ffffea0007b5a3c0 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 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO)
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:4891
__vmalloc_area_node mm/vmalloc.c:2431 [inline]
__vmalloc_node_range+0x384/0x710 mm/vmalloc.c:2499
vmalloc_user+0x70/0x80 mm/vmalloc.c:2629
kcov_mmap+0x28/0x120 kernel/kcov.c:450
call_mmap include/linux/fs.h:1988 [inline]
mmap_region+0x110d/0x16f0 mm/mmap.c:1812
do_mmap+0x822/0xd30 mm/mmap.c:1581
do_mmap_pgoff include/linux/mm.h:2480 [inline]
vm_mmap_pgoff+0x1b5/0x260 mm/util.c:528
ksys_mmap_pgoff+0x168/0x1e0 mm/mmap.c:1631
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:4951 [inline]
__free_pages+0xaf/0x140 mm/page_alloc.c:4959
__vunmap+0x75b/0x890 mm/vmalloc.c:2260
kcov_put kernel/kcov.c:396 [inline]
kcov_close+0x27/0x50 kernel/kcov.c:495
__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
__do_sys_exit_group kernel/exit.c:993 [inline]
__se_sys_exit_group kernel/exit.c:991 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:991
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881ed68f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ed68f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ed68f180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881ed68f200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ed68f280: 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 1eeb3b067 P4D 1eeb3b067 PUD 1f06e9067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 14988 Comm: syz-executor.3 Tainted: G B W 5.4.268-syzkaller-00012-g51cf29fc2bfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d78 EFLAGS: 00010202
RAX: ffffffff8154e34a RBX: 0000000000000102 RCX: ffff8881d866af40
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881ed68f1c0
RBP: ffff8881f6e09f28 R08: ffffffff8154df8e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffeed8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ed68f1c0
FS: 00007fe3ebd746c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e0dd9000 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:1418
expire_timers kernel/time/timer.c:1463 [inline]
__run_timers+0x879/0xbe0 kernel/time/timer.c:1787
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1800
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086
Modules linked in:
CR2: 0000000000000000
---[ end trace 8fc1eb5380f2317d ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d78 EFLAGS: 00010202
RAX: ffffffff8154e34a RBX: 0000000000000102 RCX: ffff8881d866af40
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881ed68f1c0
RBP: ffff8881f6e09f28 R08: ffffffff8154df8e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffeed8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ed68f1c0
FS: 00007fe3ebd746c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e0dd9000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600