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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:326 [inline]
BUG: KASAN: slab-use-after-free in isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
Read of size 8 at addr ffff8880200ad328 by task kcompactd0/33
CPU: 1 UID: 0 PID: 33 Comm: kcompactd0 Not tainted 6.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 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:326 [inline]
isolate_migratepages_block+0x2228/0x64f0 mm/compaction.c:1210
isolate_migratepages mm/compaction.c:2194 [inline]
compact_zone+0x32e6/0x4af0 mm/compaction.c:2641
compact_node+0x2de/0x460 mm/compaction.c:2935
kcompactd+0x788/0x1530 mm/compaction.c:3233
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 27:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3988 [inline]
slab_alloc_node mm/slub.c:4037 [inline]
kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1073 [inline]
new_inode+0x6e/0x310 fs/inode.c:1092
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3426
vfs_mknod+0x36d/0x3b0 fs/namei.c:4088
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 16:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x145/0x350 mm/slub.c:4548
rcu_do_batch kernel/rcu/tree.c:2569 [inline]
rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
run_ksoftirqd+0xca/0x130 kernel/softirq.c:928
smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3106 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210
destroy_inode fs/inode.c:318 [inline]
evict+0x88b/0x950 fs/inode.c:729
do_unlinkat+0x512/0x830 fs/namei.c:4493
__do_sys_unlink fs/namei.c:4534 [inline]
__se_sys_unlink fs/namei.c:4532 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4532
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880200ace60
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff8880200ace60, ffff8880200ad468)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x200a8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff8880172e7140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000130013 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff8880172e7140 dead000000000122 0000000000000000
head: 0000000000000000 0000000000130013 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000802a01 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 27, tgid 27 (kdevtmpfs), ts 8886835214, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2321
allocate_slab+0x5a/0x2f0 mm/slub.c:2484
new_slab mm/slub.c:2537 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
__slab_alloc+0x58/0xa0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4056
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4622
alloc_inode fs/inode.c:263 [inline]
new_inode_pseudo fs/inode.c:1073 [inline]
new_inode+0x6e/0x310 fs/inode.c:1092
__shmem_get_inode mm/shmem.c:2658 [inline]
shmem_get_inode+0x34a/0xd50 mm/shmem.c:2729
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3426
vfs_mknod+0x36d/0x3b0 fs/namei.c:4088
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2f0/0x390 kernel/kthread.c:389
page_owner free stack trace missing
Memory state around the buggy address:
ffff8880200ad200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880200ad280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880200ad300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880200ad380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880200ad400: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
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