==================================================================
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 ffff8881e628f1c8 by task syz-executor.3/378
CPU: 1 PID: 378 Comm: syz-executor.3 Not tainted 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_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:compound_head include/linux/page-flags.h:176 [inline]
RIP: 0010:get_page include/linux/mm.h:1121 [inline]
RIP: 0010:copy_one_pte mm/memory.c:804 [inline]
RIP: 0010:copy_pte_range mm/memory.c:855 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:906 [inline]
RIP: 0010:copy_pud_range mm/memory.c:940 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:962 [inline]
RIP: 0010:copy_page_range+0x105d/0x26f0 mm/memory.c:1024
Code: ff df 41 80 3c 07 00 74 08 4c 89 e7 e8 fc 7a 09 00 49 8b 1c 24 89 de 83 e6 01 31 ff e8 3c 99 d9 ff f6 c3 01 0f 85 e0 02 00 00 ce 95 d9 ff 4c 89 eb 48 8d 7b 34 be 04 00 00 00 e8 3d 4e 09 00
RSP: 0018:ffff8881d7b57740 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: dead000000000100 RCX: ffff8881d7b4cec0
RDX: ffff8881d7b4cec0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881d7b579d0 R08: ffffffff818aa644 R09: fffff94000ec6fc9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0007637e88
R13: ffffea0007637e80 R14: 80000001d8dfa007 R15: 1ffffd4000ec6fd1
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
RIP: 0033:0x7f29da4fded3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd155bace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f29da4fded3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555563f7750 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
The buggy address belongs to the page:
page:ffffea000798a3c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea000798a388 ffffea0007740a08 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:4893
__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:1994 [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:4953 [inline]
__free_pages+0xaf/0x140 mm/page_alloc.c:4961
__vunmap+0x75b/0x890 mm/vmalloc.c:2260
kcov_mmap+0x8c/0x120 kernel/kcov.c:474
call_mmap include/linux/fs.h:1994 [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
Memory state around the buggy address:
ffff8881e628f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e628f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881e628f180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881e628f200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e628f280: 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 1f0bd0067 P4D 1f0bd0067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 378 Comm: syz-executor.3 Tainted: G B 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:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881d7b4cec0
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881e628f1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbb48
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e628f1c0
FS: 00005555563f7480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d7b0e000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:compound_head include/linux/page-flags.h:176 [inline]
RIP: 0010:get_page include/linux/mm.h:1121 [inline]
RIP: 0010:copy_one_pte mm/memory.c:804 [inline]
RIP: 0010:copy_pte_range mm/memory.c:855 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:906 [inline]
RIP: 0010:copy_pud_range mm/memory.c:940 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:962 [inline]
RIP: 0010:copy_page_range+0x105d/0x26f0 mm/memory.c:1024
Code: ff df 41 80 3c 07 00 74 08 4c 89 e7 e8 fc 7a 09 00 49 8b 1c 24 89 de 83 e6 01 31 ff e8 3c 99 d9 ff f6 c3 01 0f 85 e0 02 00 00 ce 95 d9 ff 4c 89 eb 48 8d 7b 34 be 04 00 00 00 e8 3d 4e 09 00
RSP: 0018:ffff8881d7b57740 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: dead000000000100 RCX: ffff8881d7b4cec0
RDX: ffff8881d7b4cec0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881d7b579d0 R08: ffffffff818aa644 R09: fffff94000ec6fc9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0007637e88
R13: ffffea0007637e80 R14: 80000001d8dfa007 R15: 1ffffd4000ec6fd1
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
RIP: 0033:0x7f29da4fded3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd155bace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f29da4fded3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555563f7750 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000000
---[ end trace b86d0525316dba40 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881d7b4cec0
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881e628f1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbb48
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e628f1c0
FS: 00005555563f7480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d7b0e000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: df 41 80 filds -0x80(%rcx)
3: 3c 07 cmp $0x7,%al
5: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1)
9: 89 e7 mov %esp,%edi
b: e8 fc 7a 09 00 call 0x97b0c
10: 49 8b 1c 24 mov (%r12),%rbx
14: 89 de mov %ebx,%esi
16: 83 e6 01 and $0x1,%esi
19: 31 ff xor %edi,%edi
1b: e8 3c 99 d9 ff call 0xffd9995c
20: f6 c3 01 test $0x1,%bl
23: 0f 85 e0 02 00 00 jne 0x309
* 29: e8 ce 95 d9 ff call 0xffd995fc <-- trapping instruction
2e: 4c 89 eb mov %r13,%rbx
31: 48 8d 7b 34 lea 0x34(%rbx),%rdi
35: be 04 00 00 00 mov $0x4,%esi
3a: e8 3d 4e 09 00 call 0x94e7c