==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:852 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1484 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1719 [inline]
BUG: KASAN: use-after-free in __run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
Write of size 8 at addr ffff8881e98bb1c8 by task syz-executor.2/31192
CPU: 0 PID: 31192 Comm: syz-executor.2 Not tainted 5.4.210-syzkaller-00004-gff63a5f5cdf6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18e/0x1d5 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
hlist_move_list include/linux/list.h:852 [inline]
__collect_expired_timers kernel/time/timer.c:1484 [inline]
collect_expired_timers kernel/time/timer.c:1719 [inline]
__run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 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+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:uncharge_batch+0x3e7/0x5d0 mm/memcontrol.c:6709
Code: 01 00 00 00 e8 0a ae 00 00 89 c3 4c 89 ff e8 f0 ae 00 00 84 db 0f 85 c4 00 00 00 48 8b 44 24 20 48 89 44 24 28 ff 74 24 28 9d <49> be 00 00 00 00 00 fc ff df 43 80 3c 34 00 74 08 48 89 ef e8 90
RSP: 0018:ffff8881cd9df8b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 1ffff1103e1790ab RCX: ffff8881ce664ec0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881cd9df930 R08: ffffffff821d11c4 R09: ffffed103eb95c24
R10: ffffed103eb95c24 R11: 1ffff1103eb95c23 R12: 1ffff11039b3bf26
R13: ffff8881f0bc8558 R14: 0000000000245116 R15: ffff8881f0bc8000
uncharge_list mm/memcontrol.c:6784 [inline]
mem_cgroup_uncharge_list+0xd3/0x100 mm/memcontrol.c:6823
release_pages+0xa1b/0xa50 mm/swap.c:841
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:184 [inline]
tlb_flush_mmu+0x77f/0x910 mm/mmu_gather.c:191
zap_pte_range+0x14dd/0x1c10 mm/memory.c:1172
zap_pmd_range mm/memory.c:1221 [inline]
zap_pud_range mm/memory.c:1250 [inline]
zap_p4d_range mm/memory.c:1271 [inline]
unmap_page_range+0x35e/0x450 mm/memory.c:1292
unmap_single_vma mm/memory.c:1337 [inline]
unmap_vmas+0x306/0x440 mm/memory.c:1369
exit_mmap+0x286/0x4f0 mm/mmap.c:3166
__mmput+0x34/0x240 kernel/fork.c:1090
exit_mm kernel/exit.c:489 [inline]
do_exit+0xb40/0x2b40 kernel/exit.c:799
do_group_exit+0x136/0x300 kernel/exit.c:910
__do_sys_exit_group kernel/exit.c:921 [inline]
__se_sys_exit_group kernel/exit.c:919 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:919
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f059fb2f5a9
Code: Bad RIP value.
RSP: 002b:00007f059ebbbbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f059fb2f5a9
RDX: 00007f059fb8b489 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 00007fffa9d020b8 R09: 0000000000000003
R10: 00007fffa9d02080 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa9cb997f R14: 00007f059ebbc300 R15: 0000000000022000
Allocated by task 3039:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x131/0x1e0 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+0xd0/0x210 mm/slub.c:2842
shmem_alloc_inode+0x16/0x30 mm/shmem.c:3699
alloc_inode fs/inode.c:232 [inline]
new_inode_pseudo+0x60/0x210 fs/inode.c:928
new_inode+0x25/0x1d0 fs/inode.c:957
shmem_get_inode+0x113/0x630 mm/shmem.c:2252
shmem_mknod+0x54/0x1a0 mm/shmem.c:2844
lookup_open fs/namei.c:3309 [inline]
do_last fs/namei.c:3401 [inline]
path_openat+0x21a4/0x3710 fs/namei.c:3612
do_filp_open+0x19a/0x3a0 fs/namei.c:3642
do_sys_open+0x2e3/0x700 fs/open.c:1113
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 10:
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+0x178/0x240 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x41c/0x910 kernel/rcu/tree.c:2167
rcu_core+0x448/0xbc0 kernel/rcu/tree.c:2387
__do_softirq+0x23e/0x643 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881e98bafb0
which belongs to the cache shmem_inode_cache of size 744
The buggy address is located 536 bytes inside of
744-byte region [ffff8881e98bafb0, ffff8881e98bb298)
The buggy address belongs to the page:
page:ffffea0007a62e00 refcount:1 mapcount:0 mapping:ffff8881f5cfa000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cfa000
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+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x2ab/0x6f0 mm/page_alloc.c:4857
alloc_slab_page+0x39/0x3e0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x450 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x320/0x4a0 mm/slub.c:2667
__slab_alloc+0x5a/0x90 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
shmem_alloc_inode+0x16/0x30 mm/shmem.c:3699
alloc_inode fs/inode.c:232 [inline]
new_inode_pseudo+0x60/0x210 fs/inode.c:928
new_inode+0x25/0x1d0 fs/inode.c:957
shmem_get_inode+0x113/0x630 mm/shmem.c:2252
shmem_mknod+0x54/0x1a0 mm/shmem.c:2844
lookup_open fs/namei.c:3309 [inline]
do_last fs/namei.c:3401 [inline]
path_openat+0x21a4/0x3710 fs/namei.c:3612
do_filp_open+0x19a/0x3a0 fs/namei.c:3642
do_sys_open+0x2e3/0x700 fs/open.c:1113
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+0x7ee/0x920 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4919 [inline]
__free_pages+0x45/0x1e0 mm/page_alloc.c:4925
kfree+0x1ef/0x260 mm/slub.c:4068
device_release+0x70/0x1a0 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:708 [inline]
kobject_release+0x20c/0x330 lib/kobject.c:739
netdev_run_todo+0xae7/0xc80 net/core/dev.c:9456
tun_detach drivers/net/tun.c:760 [inline]
tun_chr_close+0xc0/0xd0 drivers/net/tun.c:3534
__fput+0x261/0x680 fs/file_table.c:281
task_work_run+0x186/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x1ba/0x1d0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x17c/0x1d0 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Memory state around the buggy address:
ffff8881e98bb080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881e98bb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881e98bb180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881e98bb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881e98bb280: fb fb fb 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: 31192 Comm: syz-executor.2 Tainted: G B 5.4.210-syzkaller-00004-gff63a5f5cdf6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d30 EFLAGS: 00010206
RAX: ffffffff8151cbb9 RBX: 0000000000000100 RCX: ffff8881ce664ec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e98bb1c0
RBP: ffff8881e98bb1e0 R08: ffffffff8151c992 R09: fffffbfff0d7370d
R10: fffffbfff0d7370d R11: 1ffffffff0d7370c R12: 000000010002c120
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881e98bb1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000005a0e000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x31/0x350 kernel/time/timer.c:1418
expire_timers+0x21e/0x400 kernel/time/timer.c:1463
__run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 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+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:uncharge_batch+0x3e7/0x5d0 mm/memcontrol.c:6709
Code: 01 00 00 00 e8 0a ae 00 00 89 c3 4c 89 ff e8 f0 ae 00 00 84 db 0f 85 c4 00 00 00 48 8b 44 24 20 48 89 44 24 28 ff 74 24 28 9d <49> be 00 00 00 00 00 fc ff df 43 80 3c 34 00 74 08 48 89 ef e8 90
RSP: 0018:ffff8881cd9df8b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 1ffff1103e1790ab RCX: ffff8881ce664ec0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881cd9df930 R08: ffffffff821d11c4 R09: ffffed103eb95c24
R10: ffffed103eb95c24 R11: 1ffff1103eb95c23 R12: 1ffff11039b3bf26
R13: ffff8881f0bc8558 R14: 0000000000245116 R15: ffff8881f0bc8000
uncharge_list mm/memcontrol.c:6784 [inline]
mem_cgroup_uncharge_list+0xd3/0x100 mm/memcontrol.c:6823
release_pages+0xa1b/0xa50 mm/swap.c:841
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:184 [inline]
tlb_flush_mmu+0x77f/0x910 mm/mmu_gather.c:191
zap_pte_range+0x14dd/0x1c10 mm/memory.c:1172
zap_pmd_range mm/memory.c:1221 [inline]
zap_pud_range mm/memory.c:1250 [inline]
zap_p4d_range mm/memory.c:1271 [inline]
unmap_page_range+0x35e/0x450 mm/memory.c:1292
unmap_single_vma mm/memory.c:1337 [inline]
unmap_vmas+0x306/0x440 mm/memory.c:1369
exit_mmap+0x286/0x4f0 mm/mmap.c:3166
__mmput+0x34/0x240 kernel/fork.c:1090
exit_mm kernel/exit.c:489 [inline]
do_exit+0xb40/0x2b40 kernel/exit.c:799
do_group_exit+0x136/0x300 kernel/exit.c:910
__do_sys_exit_group kernel/exit.c:921 [inline]
__se_sys_exit_group kernel/exit.c:919 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:919
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f059fb2f5a9
Code: Bad RIP value.
RSP: 002b:00007f059ebbbbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f059fb2f5a9
RDX: 00007f059fb8b489 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 00007fffa9d020b8 R09: 0000000000000003
R10: 00007fffa9d02080 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa9cb997f R14: 00007f059ebbc300 R15: 0000000000022000
Modules linked in:
CR2: 0000000000000000
---[ end trace 5ec839b94775db6e ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d30 EFLAGS: 00010206
RAX: ffffffff8151cbb9 RBX: 0000000000000100 RCX: ffff8881ce664ec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e98bb1c0
RBP: ffff8881e98bb1e0 R08: ffffffff8151c992 R09: fffffbfff0d7370d
R10: fffffbfff0d7370d R11: 1ffffffff0d7370c R12: 000000010002c120
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881e98bb1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000005a0e000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 01 00 add %eax,(%rax)
2: 00 00 add %al,(%rax)
4: e8 0a ae 00 00 callq 0xae13
9: 89 c3 mov %eax,%ebx
b: 4c 89 ff mov %r15,%rdi
e: e8 f0 ae 00 00 callq 0xaf03
13: 84 db test %bl,%bl
15: 0f 85 c4 00 00 00 jne 0xdf
1b: 48 8b 44 24 20 mov 0x20(%rsp),%rax
20: 48 89 44 24 28 mov %rax,0x28(%rsp)
25: ff 74 24 28 pushq 0x28(%rsp)
29: 9d popfq
* 2a: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 <-- trapping instruction
31: fc ff df
34: 43 80 3c 34 00 cmpb $0x0,(%r12,%r14,1)
39: 74 08 je 0x43
3b: 48 89 ef mov %rbp,%rdi
3e: e8 .byte 0xe8
3f: 90 nop