syzbot

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BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: use-after-free in mapping_unevictable include/linux/pagemap.h:252 [inline]
BUG: KASAN: use-after-free in folio_evictable mm/internal.h:138 [inline]
BUG: KASAN: use-after-free in lru_add_fn+0x2d4/0x1ac0 mm/swap.c:210
Read of size 8 at addr ffff88805d642bb0 by task modprobe/7977

CPU: 1 PID: 7977 Comm: modprobe Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:395
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 mapping_unevictable include/linux/pagemap.h:252 [inline]
 folio_evictable mm/internal.h:138 [inline]
 lru_add_fn+0x2d4/0x1ac0 mm/swap.c:210
 folio_batch_move_lru+0x31a/0x720 mm/swap.c:246
 lru_add_drain_cpu+0x108/0x8b0 mm/swap.c:669
 lru_add_drain+0x11e/0x3e0 mm/swap.c:773
 shift_arg_pages fs/exec.c:718 [inline]
 setup_arg_pages+0x937/0xb90 fs/exec.c:836
 load_elf_binary+0xb80/0x2750 fs/binfmt_elf.c:1019
 search_binary_handler fs/exec.c:1737 [inline]
 exec_binprm fs/exec.c:1778 [inline]
 bprm_execve+0x96a/0x18a0 fs/exec.c:1847
 kernel_execve+0x8e6/0xa10 fs/exec.c:2012
 call_usermodehelper_exec_async+0x22f/0x370 kernel/umh.c:113
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Allocated by task 7958:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3193 [inline]
 nilfs_alloc_inode+0x2a/0xe0 fs/nilfs2/super.c:154
 alloc_inode fs/inode.c:261 [inline]
 iget5_locked+0x9c/0x270 fs/inode.c:1285
 nilfs_iget_locked+0x127/0x180 fs/nilfs2/inode.c:605
 nilfs_ifile_read+0x2e/0x170 fs/nilfs2/ifile.c:187
 nilfs_attach_checkpoint+0x260/0x4d0 fs/nilfs2/super.c:572
 nilfs_fill_super+0x349/0x660 fs/nilfs2/super.c:1095
 nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1562
 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 4060:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 kmem_cache_free+0x292/0x510 mm/slub.c:3683
 rcu_do_batch kernel/rcu/tree.c:2296 [inline]
 rcu_core+0xad5/0x1810 kernel/rcu/tree.c:2556
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 do_softirq+0x162/0x240 kernel/softirq.c:472
 __local_bh_enable_ip+0x1b1/0x1f0 kernel/softirq.c:396
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_purge_orig_ref+0x150a/0x1600 net/batman-adv/originator.c:1259
 batadv_purge_orig+0x15/0x60 net/batman-adv/originator.c:1272
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2844
 nilfs_put_root+0x93/0xb0 fs/nilfs2/the_nilfs.c:910
 nilfs_segctor_destroy fs/nilfs2/segment.c:2825 [inline]
 nilfs_detach_log_writer+0x8c5/0xbd0 fs/nilfs2/segment.c:2887
 nilfs_put_super+0x49/0x150 fs/nilfs2/super.c:498
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7a/0xe0 fs/super.c:1459
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88805d642670
 which belongs to the cache nilfs2_inode_cache of size 1512
The buggy address is located 1344 bytes inside of
 1512-byte region [ffff88805d642670, ffff88805d642c58)

The buggy address belongs to the physical page:
page:ffffea0001759000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5d640
head:ffffea0001759000 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff888062e97801
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88814138e500
raw: 0000000000000000 0000000080130013 00000001ffffffff ffff888062e97801
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 7958, tgid 7957 (syz.2.767), ts 367292020585, free_ts 361506501923
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
 prep_new_page mm/page_alloc.c:2520 [inline]
 get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547
 alloc_slab_page+0x6a/0x150 mm/slub.c:1794
 allocate_slab mm/slub.c:1939 [inline]
 new_slab+0x84/0x2d0 mm/slub.c:1992
 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x1a5/0x2d0 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3193 [inline]
 nilfs_alloc_inode+0x2a/0xe0 fs/nilfs2/super.c:154
 alloc_inode fs/inode.c:261 [inline]
 iget5_locked+0x9c/0x270 fs/inode.c:1285
 nilfs_iget_locked+0x127/0x180 fs/nilfs2/inode.c:605
 nilfs_dat_read+0xbb/0x300 fs/nilfs2/dat.c:497
 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline]
 load_nilfs+0x4f1/0x1040 fs/nilfs2/the_nilfs.c:301
 nilfs_fill_super+0x2ca/0x660 fs/nilfs2/super.c:1090
 nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1562
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1440 [inline]
 free_pcp_prepare mm/page_alloc.c:1490 [inline]
 free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
 getname_flags+0xb8/0x4f0 fs/namei.c:139
 do_sys_openat2+0xd2/0x500 fs/open.c:1312
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88805d642a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805d642b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805d642b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88805d642c00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
 ffff88805d642c80: fc fc fc fc fc fc fc fc fc fc fc fa fb fb fb fb
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