==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:335 [inline]
BUG: KASAN: slab-use-after-free in isolate_migratepages_block+0x3ea4/0x5680 mm/compaction.c:1180
Read of size 8 at addr ffff8880232759b0 by task syz.2.398/7871
CPU: 1 UID: 0 PID: 7871 Comm: syz.2.398 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:335 [inline]
isolate_migratepages_block+0x3ea4/0x5680 mm/compaction.c:1180
isolate_migratepages mm/compaction.c:2164 [inline]
compact_zone+0x1a5c/0x4280 mm/compaction.c:2611
compact_node+0x1a2/0x2d0 mm/compaction.c:2910
compact_nodes mm/compaction.c:2932 [inline]
sysctl_compaction_handler mm/compaction.c:2983 [inline]
sysctl_compaction_handler+0x145/0x220 mm/compaction.c:2970
proc_sys_call_handler+0x403/0x5d0 fs/proc/proc_sysctl.c:601
iter_file_splice_write+0x90f/0x10b0 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x18f/0x6c0 fs/splice.c:1164
splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x178/0x250 fs/splice.c:1233
do_sendfile+0xaed/0xe30 fs/read_write.c:1363
__do_compat_sys_sendfile fs/read_write.c:1439 [inline]
__se_compat_sys_sendfile fs/read_write.c:1428 [inline]
__ia32_compat_sys_sendfile+0x163/0x230 fs/read_write.c:1428
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fd0579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f512655c EFLAGS: 00000296 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000005
RDX: 00000000200000c0 RSI: 0000000000000009 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 37:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
kmem_cache_alloc_lru_noprof+0x1c8/0x3b0 mm/slub.c:4187
shmem_alloc_inode+0x25/0x50 mm/shmem.c:4982
alloc_inode+0x5d/0x230 fs/inode.c:336
new_inode_pseudo fs/inode.c:1174 [inline]
new_inode+0x22/0x210 fs/inode.c:1193
__shmem_get_inode mm/shmem.c:2876 [inline]
shmem_get_inode+0x194/0xf00 mm/shmem.c:2950
shmem_mknod+0x1a8/0x450 mm/shmem.c:3672
vfs_mknod+0x5d7/0x8e0 fs/namei.c:4189
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x1a8/0x7d0 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 34:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kmem_cache_free+0x152/0x4c0 mm/slub.c:4715
i_callback+0x43/0x70 fs/inode.c:325
rcu_do_batch kernel/rcu/tree.c:2567 [inline]
rcu_core+0x79d/0x14d0 kernel/rcu/tree.c:2823
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
run_ksoftirqd kernel/softirq.c:950 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:942
smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544
__call_rcu_common.constprop.0+0x99/0x7a0 kernel/rcu/tree.c:3086
destroy_inode+0x12c/0x1b0 fs/inode.c:391
evict+0x5ed/0x960 fs/inode.c:827
iput_final fs/inode.c:1946 [inline]
iput fs/inode.c:1972 [inline]
iput+0x52a/0x890 fs/inode.c:1958
do_unlinkat+0x5c3/0x760 fs/namei.c:4594
__do_sys_unlink fs/namei.c:4635 [inline]
__se_sys_unlink fs/namei.c:4633 [inline]
__ia32_sys_unlink+0xc4/0x110 fs/namei.c:4633
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff8880232754e8
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff8880232754e8, ffff888023275af0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888023277590 pfn:0x23270
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff888040489cc0 ffffea00008f5210 ffffea00008cb010
raw: ffff888023277590 0000000000130001 00000001f5000000 0000000000000000
head: 00fff00000000240 ffff888040489cc0 ffffea00008f5210 ffffea00008cb010
head: ffff888023277590 0000000000130001 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea00008c9c01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 37, tgid 37 (kdevtmpfs), ts 5522885766, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2589 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2642
___slab_alloc+0xce2/0x1650 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
kmem_cache_alloc_lru_noprof+0xf0/0x3b0 mm/slub.c:4187
shmem_alloc_inode+0x25/0x50 mm/shmem.c:4982
alloc_inode+0x5d/0x230 fs/inode.c:336
new_inode_pseudo fs/inode.c:1174 [inline]
new_inode+0x22/0x210 fs/inode.c:1193
__shmem_get_inode mm/shmem.c:2876 [inline]
shmem_get_inode+0x194/0xf00 mm/shmem.c:2950
shmem_mknod+0x1a8/0x450 mm/shmem.c:3672
vfs_mknod+0x5d7/0x8e0 fs/namei.c:4189
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x1a8/0x7d0 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
page_owner free stack trace missing
Memory state around the buggy address:
ffff888023275880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888023275900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888023275980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888023275a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888023275a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi