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BUG: KASAN: use-after-free in diFree+0x16ca/0x2830 fs/jfs/jfs_imap.c:892
Read of size 4 at addr ffff88808ab810c4 by task syz-executor163/8746

CPU: 1 PID: 8746 Comm: syz-executor163 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350
 kasan_report mm/kasan/report.c:408 [inline]
 __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:428
 diFree+0x16ca/0x2830 fs/jfs/jfs_imap.c:892
 jfs_evict_inode+0x198/0x210 fs/jfs/inode.c:166
 evict+0x2c8/0x700 fs/inode.c:554
 iput_final fs/inode.c:1523 [inline]
 iput+0x458/0x7e0 fs/inode.c:1550
 diFreeSpecial fs/jfs/jfs_imap.c:569 [inline]
 diFreeSpecial+0x63/0x80 fs/jfs/jfs_imap.c:561
 jfs_mount+0x2c6/0x380 fs/jfs/jfs_mount.c:215
 jfs_fill_super+0x52a/0xab0 fs/jfs/super.c:589
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f141f27c5fa
RSP: 002b:00007ffea177d768 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f141f27c5fa
RDX: 0000000020005d00 RSI: 0000000020000040 RDI: 00007ffea177d780
RBP: 00007ffea177d780 R08: 00007ffea177d7c0 R09: 0000000000000002
R10: 0000000000000080 R11: 0000000000000282 R12: 0000000000000004
R13: 00005555569212c0 R14: 0000000000000080 R15: 00007ffea177d7c0

Allocated by task 8746:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 diMount+0x4c/0x650 fs/jfs/jfs_imap.c:118
 jfs_mount+0x262/0x380 fs/jfs/jfs_mount.c:163
 jfs_fill_super+0x52a/0xab0 fs/jfs/super.c:589
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 8746:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 diUnmount+0xe4/0x120 fs/jfs/jfs_imap.c:210
 jfs_mount+0x29a/0x380 fs/jfs/jfs_mount.c:207
 jfs_fill_super+0x52a/0xab0 fs/jfs/super.c:589
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

The buggy address belongs to the object at ffff88808ab810c0
 which belongs to the cache kmalloc-32768 of size 32768
The buggy address is located 4 bytes inside of
 32768-byte region [ffff88808ab810c0, ffff88808ab890c0)
The buggy address belongs to the page:
page:ffffea00022ae000 count:1 mapcount:0 mapping:ffff88808ab810c0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff88808ab810c0 0000000000000000 0000000100000001
raw: ffffea00022adc20 ffffea00022ae420 ffff88813fe65380 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808ab80f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808ab81000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808ab81080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                           ^
 ffff88808ab81100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808ab81180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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