==================================================================
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 ffff8881cfb571c8 by task syz.1.15/447
CPU: 1 PID: 447 Comm: syz.1.15 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_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: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:free_unref_page_list+0x539/0x590 mm/page_alloc.c:3178
Code: ff 0d c7 9a 72 7e 48 8b 74 24 30 0f 85 68 fe ff ff e8 6b 61 70 ff e9 5e fe ff ff 48 8b 44 24 18 48 89 44 24 50 ff 74 24 50 9d <48> c7 44 24 60 0e 36 e0 45 48 b8 00 00 00 00 00 fc ff df 48 8b 4c
RSP: 0018:ffff8881e9b57160 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 1ffffd4000e7495d RCX: dffffc0000000000
RDX: ffffea00073a5308 RSI: ffff8881f6f5c320 RDI: ffffea00073a4ac8
RBP: ffff8881e9b57270 R08: ffffffff8231cdb9 R09: ffffed1039d25600
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea00073a4ae8
R13: ffff8881e9b57320 R14: ffff8881e9b57320 R15: 000000000000000f
release_pages+0xad8/0xb20 mm/swap.c:842
__pagevec_release+0xc3/0x150 mm/swap.c:862
pagevec_release include/linux/pagevec.h:88 [inline]
shmem_undo_range+0x8a5/0x1ad0 mm/shmem.c:875
shmem_truncate_range mm/shmem.c:997 [inline]
shmem_evict_inode+0x218/0x9a0 mm/shmem.c:1097
evict+0x4ea/0x960 fs/inode.c:610
__dentry_kill+0x429/0x630 fs/dcache.c:583
dentry_kill+0xb8/0x280 fs/dcache.c:677
dput+0x3c/0x80 fs/dcache.c:864
__fput+0x443/0x680 fs/file_table.c:294
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:861
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
ret_from_intr+0x1c/0x1c
RIP: 0033:0x7f79e5e35171
Code: Bad RIP value.
RSP: 002b:00004000000001a0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f79e604dfa0 RCX: 00007f79e5e35169
RDX: 00004000000002c0 RSI: 00004000000001a0 RDI: 0000000000020000
RBP: 00007f79e5eb62a0 R08: 0000400000000380 R09: 0000400000000380
R10: 0000400000000300 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f79e604dfa0 R15: 00007ffdd214b138
Allocated by task 411:
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
shmem_alloc_inode+0x16/0x30 mm/shmem.c:3719
alloc_inode fs/inode.c:231 [inline]
new_inode_pseudo+0x60/0x210 fs/inode.c:966
new_inode+0x25/0x1d0 fs/inode.c:995
shmem_get_inode+0x10b/0x620 mm/shmem.c:2252
shmem_symlink+0x118/0x5f0 mm/shmem.c:3068
vfs_symlink+0x36c/0x500 fs/namei.c:4276
do_symlinkat+0x19b/0x400 fs/namei.c:4303
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 17:
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
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x492/0xa00 kernel/rcu/tree.c:2167
rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881cfb57090
which belongs to the cache shmem_inode_cache of size 760
The buggy address is located 312 bytes inside of
760-byte region [ffff8881cfb57090, ffff8881cfb57388)
The buggy address belongs to the page:
page:ffffea00073ed500 refcount:1 mapcount:0 mapping:ffff8881f5cffb80 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cffb80
raw: 0000000000000000 0000000000120012 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
shmem_alloc_inode+0x16/0x30 mm/shmem.c:3719
alloc_inode fs/inode.c:231 [inline]
new_inode_pseudo+0x60/0x210 fs/inode.c:966
new_inode+0x25/0x1d0 fs/inode.c:995
shmem_get_inode+0x10b/0x620 mm/shmem.c:2252
shmem_mknod+0x54/0x1a0 mm/shmem.c:2844
lookup_open fs/namei.c:3379 [inline]
do_last fs/namei.c:3471 [inline]
path_openat+0x184a/0x34b0 fs/namei.c:3683
do_filp_open+0x20b/0x450 fs/namei.c:3713
do_sys_open+0x39c/0x810 fs/open.c:1123
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 mm/page_alloc.c:4961 [inline]
free_pages+0xf6/0x1b0 mm/page_alloc.c:4969
stack_depot_save+0x42b/0x480 lib/stackdepot.c:300
save_stack mm/kasan/common.c:72 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x21c/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
kobject_cleanup lib/kobject.c:722 [inline]
kobject_release lib/kobject.c:747 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x21a/0x2f0 lib/kobject.c:764
netdev_queue_update_kobjects+0x337/0x3a0 net/core/net-sysfs.c:1610
remove_queue_kobjects net/core/net-sysfs.c:1663 [inline]
netdev_unregister_kobject+0x10c/0x240 net/core/net-sysfs.c:1816
rollback_registered_many+0xed6/0x1330 net/core/dev.c:8674
unregister_netdevice_many net/core/dev.c:9805 [inline]
default_device_exit_batch+0x3e0/0x680 net/core/dev.c:10276
ops_exit_list net/core/net_namespace.c:187 [inline]
cleanup_net+0x6e2/0xc90 net/core/net_namespace.c:612
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Memory state around the buggy address:
ffff8881cfb57080: fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881cfb57100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881cfb57180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881cfb57200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881cfb57280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1ec740067 P4D 1ec740067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 447 Comm: syz.1.15 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:ffff8881f6f09d18 EFLAGS: 00010006
RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881ee23ee40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881cfb571c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9820
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881cfb571c0
FS: 00007f79e449f6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001eb12e000 CR4: 00000000003406a0
DR0: 0000400000000300 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:1488 [inline]
__run_timers+0x8a5/0xbe0 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:free_unref_page_list+0x539/0x590 mm/page_alloc.c:3178
Code: ff 0d c7 9a 72 7e 48 8b 74 24 30 0f 85 68 fe ff ff e8 6b 61 70 ff e9 5e fe ff ff 48 8b 44 24 18 48 89 44 24 50 ff 74 24 50 9d <48> c7 44 24 60 0e 36 e0 45 48 b8 00 00 00 00 00 fc ff df 48 8b 4c
RSP: 0018:ffff8881e9b57160 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 1ffffd4000e7495d RCX: dffffc0000000000
RDX: ffffea00073a5308 RSI: ffff8881f6f5c320 RDI: ffffea00073a4ac8
RBP: ffff8881e9b57270 R08: ffffffff8231cdb9 R09: ffffed1039d25600
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea00073a4ae8
R13: ffff8881e9b57320 R14: ffff8881e9b57320 R15: 000000000000000f
release_pages+0xad8/0xb20 mm/swap.c:842
__pagevec_release+0xc3/0x150 mm/swap.c:862
pagevec_release include/linux/pagevec.h:88 [inline]
shmem_undo_range+0x8a5/0x1ad0 mm/shmem.c:875
shmem_truncate_range mm/shmem.c:997 [inline]
shmem_evict_inode+0x218/0x9a0 mm/shmem.c:1097
evict+0x4ea/0x960 fs/inode.c:610
__dentry_kill+0x429/0x630 fs/dcache.c:583
dentry_kill+0xb8/0x280 fs/dcache.c:677
dput+0x3c/0x80 fs/dcache.c:864
__fput+0x443/0x680 fs/file_table.c:294
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:861
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
ret_from_intr+0x1c/0x1c
RIP: 0033:0x7f79e5e35171
Code: Bad RIP value.
RSP: 002b:00004000000001a0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f79e604dfa0 RCX: 00007f79e5e35169
RDX: 00004000000002c0 RSI: 00004000000001a0 RDI: 0000000000020000
RBP: 00007f79e5eb62a0 R08: 0000400000000380 R09: 0000400000000380
R10: 0000400000000300 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f79e604dfa0 R15: 00007ffdd214b138
Modules linked in:
CR2: 0000000000000000
---[ end trace 19b1909820f23463 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010006
RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881ee23ee40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881cfb571c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9820
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881cfb571c0
FS: 00007f79e449f6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001eb12e000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: ff 0d c7 9a 72 7e decl 0x7e729ac7(%rip) # 0x7e729acd
6: 48 8b 74 24 30 mov 0x30(%rsp),%rsi
b: 0f 85 68 fe ff ff jne 0xfffffe79
11: e8 6b 61 70 ff call 0xff706181
16: e9 5e fe ff ff jmp 0xfffffe79
1b: 48 8b 44 24 18 mov 0x18(%rsp),%rax
20: 48 89 44 24 50 mov %rax,0x50(%rsp)
25: ff 74 24 50 push 0x50(%rsp)
29: 9d popf
* 2a: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp) <-- trapping instruction
31: e0 45
33: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
3a: fc ff df
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 4c rex.WR