loop5: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-use-after-free in dtReadFirst+0x502/0x930
Read of size 4 at addr ffff8881121c5028 by task syz.5.924/8691

CPU: 1 UID: 0 PID: 8691 Comm: syz.5.924 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 dtReadFirst+0x502/0x930
 jfs_readdir+0x709/0x3ae0
 wrap_directory_iterator+0x96/0xe0
 iterate_dir+0x399/0x570
 __se_sys_getdents64+0xe4/0x260
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f306bf8ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f306cebc038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f306c1d5fa0 RCX: 00007f306bf8ec29
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000005
RBP: 00007f306c011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f306c1d6038 R14: 00007f306c1d5fa0 R15: 00007ffe3f7db4d8
 </TASK>

Allocated by task 7971:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x35d/0x6d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 ialloc+0x4c/0x8f0
 jfs_create+0x18d/0xa80
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 23:
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x19b/0x690
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 run_ksoftirqd+0x9b/0x100
 smpboot_thread_fn+0x542/0xa60
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 evict+0x847/0x9c0
 jfs_create+0x4ca/0xa80
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881121c4940
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 1768 bytes inside of
 freed 2216-byte region [ffff8881121c4940, ffff8881121c51e8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881121c2dc8 pfn:0x1121c0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88811894ca01
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801db11280 dead000000000122 0000000000000000
raw: ffff8881121c2dc8 00000000800d000b 00000000f5000000 ffff88811894ca01
head: 057ff00000000040 ffff88801db11280 dead000000000122 0000000000000000
head: ffff8881121c2dc8 00000000800d000b 00000000f5000000 ffff88811894ca01
head: 057ff00000000003 ffffea0004487001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6113, tgid 6112 (syz.0.75), ts 75688568659, free_ts 75633161035
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x3a0
 ___slab_alloc+0xe94/0x1920
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3ef/0x6d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 jfs_fill_super+0x569/0xd80
 get_tree_bdev_flags+0x40e/0x4d0
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x302/0x9e0
 __se_sys_mount+0x313/0x410
page last free pid 6116 tgid 6116 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x2e7/0x390
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x367/0x6e0
 __pmd_alloc+0xc2/0x540
 __handle_mm_fault+0x9ad/0x5400
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa7c/0x1380
 exc_page_fault+0x82/0x100
 asm_exc_page_fault+0x26/0x30

Memory state around the buggy address:
 ffff8881121c4f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881121c4f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881121c5000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff8881121c5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881121c5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
