ERROR: (device loop1): txAbort: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x38cd/0x39e0 fs/jfs/jfs_dtree.c:1522
Read of size 1 at addr ffff888057ac1b05 by task syz.1.1415/13043

CPU: 1 UID: 0 PID: 13043 Comm: syz.1.1415 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 dtSplitPage+0x38cd/0x39e0 fs/jfs/jfs_dtree.c:1522
 dtSplitUp+0x7ba/0x5970 fs/jfs/jfs_dtree.c:1092
 dtInsert+0x8dd/0xb60 fs/jfs/jfs_dtree.c:871
 jfs_create+0x645/0xb60 fs/jfs/namei.c:137
 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796
 open_last_lookups fs/namei.c:3895 [inline]
 path_openat+0x893/0x2cb0 fs/namei.c:4131
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x153/0x1e0 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85fbb8f6c9
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:00007f85fca26038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f85fbde5fa0 RCX: 00007f85fbb8f6c9
RDX: 389b0d52417bb201 RSI: 0000000000064842 RDI: 00002000000005c0
RBP: 00007f85fbc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f85fbde6038 R14: 00007f85fbde5fa0 R15: 00007ffd1df12838
 </TASK>

Allocated by task 13043:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_save_track+0x14/0x30 mm/kasan/common.c:77
 unpoison_slab_object mm/kasan/common.c:342 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4978 [inline]
 slab_alloc_node mm/slub.c:5288 [inline]
 kmem_cache_alloc_lru_noprof+0x254/0x6e0 mm/slub.c:5307
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 iget_locked+0x2fa/0x860 fs/inode.c:1445
 jfs_iget+0x20/0x590 fs/jfs/inode.c:29
 jfs_lookup+0x2b2/0x380 fs/jfs/namei.c:1469
 __lookup_slow+0x251/0x460 fs/namei.c:1816
 lookup_slow fs/namei.c:1833 [inline]
 walk_component+0x353/0x5b0 fs/namei.c:2151
 lookup_last fs/namei.c:2652 [inline]
 path_lookupat+0x142/0x6d0 fs/namei.c:2676
 filename_lookup+0x224/0x5f0 fs/namei.c:2705
 user_path_at+0x3a/0x60 fs/namei.c:3215
 __do_sys_chdir fs/open.c:561 [inline]
 __se_sys_chdir fs/open.c:555 [inline]
 __x64_sys_chdir+0xbe/0x270 fs/open.c:555
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888057ac1250
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 13 bytes to the right of
 allocated 2216-byte region [ffff888057ac1250, ffff888057ac1af8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57ac0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888075d55e01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881436c8780 ffffea00015ece00 0000000000000002
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888075d55e01
head: 00fff00000000040 ffff8881436c8780 ffffea00015ece00 0000000000000002
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888075d55e01
head: 00fff00000000003 ffffea00015eb001 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 7234, tgid 7228 (syz.0.299), ts 238091858566, free_ts 113907797960
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3059 [inline]
 allocate_slab mm/slub.c:3232 [inline]
 new_slab+0x24a/0x360 mm/slub.c:3286
 ___slab_alloc+0xd79/0x1a50 mm/slub.c:4655
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4778
 __slab_alloc_node mm/slub.c:4854 [inline]
 slab_alloc_node mm/slub.c:5276 [inline]
 kmem_cache_alloc_lru_noprof+0x443/0x6e0 mm/slub.c:5307
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 new_inode+0x22/0x1c0 fs/inode.c:1145
 diReadSpecial+0x51/0x730 fs/jfs/jfs_imap.c:426
 jfs_mount+0x607/0x8a0 fs/jfs/jfs_mount.c:138
 jfs_fill_super+0x823/0x1040 fs/jfs/super.c:523
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
 vfs_get_tree+0x8e/0x340 fs/super.c:1751
page last free pid 5194 tgid 5194 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:352
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4978 [inline]
 slab_alloc_node mm/slub.c:5288 [inline]
 kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5295
 getname_flags.part.0+0x4c/0x550 fs/namei.c:146
 getname_flags+0x93/0xf0 include/linux/audit.h:345
 getname include/linux/fs.h:2922 [inline]
 do_sys_openat2+0xb8/0x1d0 fs/open.c:1431
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888057ac1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888057ac1a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
>ffff888057ac1b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00
                   ^
 ffff888057ac1b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888057ac1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: slab-out-of-bounds in dtInsertEntry.isra.0+0x13a1/0x1670 fs/jfs/jfs_dtree.c:3765
Read of size 4 at addr ffff888057ac1b1c by task syz.1.1415/13043

CPU: 0 UID: 0 PID: 13043 Comm: syz.1.1415 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 dtInsertEntry.isra.0+0x13a1/0x1670 fs/jfs/jfs_dtree.c:3765
 dtSplitPage+0x2bd0/0x39e0 fs/jfs/jfs_dtree.c:1596
 dtSplitUp+0x7ba/0x5970 fs/jfs/jfs_dtree.c:1092
 dtInsert+0x8dd/0xb60 fs/jfs/jfs_dtree.c:871
 jfs_create+0x645/0xb60 fs/jfs/namei.c:137
 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796
 open_last_lookups fs/namei.c:3895 [inline]
 path_openat+0x893/0x2cb0 fs/namei.c:4131
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x153/0x1e0 fs/open.c:1456
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85fbb8f6c9
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:00007f85fca26038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f85fbde5fa0 RCX: 00007f85fbb8f6c9
RDX: 389b0d52417bb201 RSI: 0000000000064842 RDI: 00002000000005c0
RBP: 00007f85fbc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f85fbde6038 R14: 00007f85fbde5fa0 R15: 00007ffd1df12838
 </TASK>

Allocated by task 13043:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_save_track+0x14/0x30 mm/kasan/common.c:77
 unpoison_slab_object mm/kasan/common.c:342 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4978 [inline]
 slab_alloc_node mm/slub.c:5288 [inline]
 kmem_cache_alloc_lru_noprof+0x254/0x6e0 mm/slub.c:5307
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 iget_locked+0x2fa/0x860 fs/inode.c:1445
 jfs_iget+0x20/0x590 fs/jfs/inode.c:29
 jfs_lookup+0x2b2/0x380 fs/jfs/namei.c:1469
 __lookup_slow+0x251/0x460 fs/namei.c:1816
 lookup_slow fs/namei.c:1833 [inline]
 walk_component+0x353/0x5b0 fs/namei.c:2151
 lookup_last fs/namei.c:2652 [inline]
 path_lookupat+0x142/0x6d0 fs/namei.c:2676
 filename_lookup+0x224/0x5f0 fs/namei.c:2705
 user_path_at+0x3a/0x60 fs/namei.c:3215
 __do_sys_chdir fs/open.c:561 [inline]
 __se_sys_chdir fs/open.c:555 [inline]
 __x64_sys_chdir+0xbe/0x270 fs/open.c:555
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888057ac1250
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 36 bytes to the right of
 allocated 2216-byte region [ffff888057ac1250, ffff888057ac1af8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57ac0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888075d55e01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881436c8780 ffffea00015ece00 0000000000000002
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888075d55e01
head: 00fff00000000040 ffff8881436c8780 ffffea00015ece00 0000000000000002
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888075d55e01
head: 00fff00000000003 ffffea00015eb001 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 7234, tgid 7228 (syz.0.299), ts 238091858566, free_ts 113907797960
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3059 [inline]
 allocate_slab mm/slub.c:3232 [inline]
 new_slab+0x24a/0x360 mm/slub.c:3286
 ___slab_alloc+0xd79/0x1a50 mm/slub.c:4655
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4778
 __slab_alloc_node mm/slub.c:4854 [inline]
 slab_alloc_node mm/slub.c:5276 [inline]
 kmem_cache_alloc_lru_noprof+0x443/0x6e0 mm/slub.c:5307
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 new_inode+0x22/0x1c0 fs/inode.c:1145
 diReadSpecial+0x51/0x730 fs/jfs/jfs_imap.c:426
 jfs_mount+0x607/0x8a0 fs/jfs/jfs_mount.c:138
 jfs_fill_super+0x823/0x1040 fs/jfs/super.c:523
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
 vfs_get_tree+0x8e/0x340 fs/super.c:1751
page last free pid 5194 tgid 5194 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:352
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4978 [inline]
 slab_alloc_node mm/slub.c:5288 [inline]
 kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5295
 getname_flags.part.0+0x4c/0x550 fs/namei.c:146
 getname_flags+0x93/0xf0 include/linux/audit.h:345
 getname include/linux/fs.h:2922 [inline]
 do_sys_openat2+0xb8/0x1d0 fs/open.c:1431
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888057ac1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888057ac1a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
>ffff888057ac1b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00
                            ^
 ffff888057ac1b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888057ac1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
find_entry called with index >= next_index
read_mapping_page failed!
ERROR: (device loop1): txAbort: