read_mapping_page failed!
ERROR: (device loop6): txAbort: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x38ce/0x39e0 fs/jfs/jfs_dtree.c:1522
Read of size 1 at addr ffff8880559cbfa5 by task syz.6.2038/14202

CPU: 1 UID: 0 PID: 14202 Comm: syz.6.2038 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+0x38ce/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_mkdir+0x67d/0xba0 fs/jfs/namei.c:270
 vfs_mkdir+0x731/0xb60 fs/namei.c:5139
 do_mkdirat+0x442/0x5e0 fs/namei.c:5173
 __do_sys_mkdirat fs/namei.c:5195 [inline]
 __se_sys_mkdirat fs/namei.c:5193 [inline]
 __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:5193
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2f0f38de97
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f2f1023ce68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f2f1023cef0 RCX: 00007f2f0f38de97
RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f2f1023ceb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 14202:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_lru_noprof+0x262/0x770 mm/slub.c:5282
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 iget_locked+0x1d9/0x6d0 fs/inode.c:1470
 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:1866
 lookup_slow+0x50/0x70 fs/namei.c:1883
 walk_component fs/namei.c:2229 [inline]
 lookup_last fs/namei.c:2730 [inline]
 path_lookupat+0x5e9/0xc40 fs/namei.c:2754
 filename_lookup+0x224/0x5f0 fs/namei.c:2783
 user_path_at+0x3a/0x60 fs/namei.c:3576
 __do_sys_chdir fs/open.c:558 [inline]
 __se_sys_chdir fs/open.c:552 [inline]
 __x64_sys_chdir+0xbe/0x270 fs/open.c:552
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880559cb6f0
 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 [ffff8880559cb6f0, ffff8880559cbf98)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x559c8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888053651f01
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801cb48b40 0000000000000000 0000000000000001
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888053651f01
head: 00fff00000000040 ffff88801cb48b40 0000000000000000 0000000000000001
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888053651f01
head: 00fff00000000003 ffffea0001567201 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 9797, tgid 9796 (syz.2.1338), ts 362147832346, free_ts 113345233137
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
 prep_new_page mm/page_alloc.c:1865 [inline]
 get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab mm/slub.c:3248 [inline]
 new_slab+0x2c3/0x430 mm/slub.c:3302
 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 kmem_cache_alloc_lru_noprof+0x451/0x770 mm/slub.c:5282
 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:1175
 jfs_fill_super+0x6a8/0x1040 fs/jfs/super.c:511
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
 vfs_get_tree+0x8e/0x330 fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount fs/namespace.c:3712 [inline]
 path_mount+0x7bf/0x23a0 fs/namespace.c:4022
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount fs/namespace.c:4201 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4201
page last free pid 5828 tgid 5828 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1406 [inline]
 __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4c/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_noprof+0x25e/0x770 mm/slub.c:5270
 getname_flags.part.0+0x4c/0x550 fs/namei.c:146
 getname_flags+0x93/0xf0 include/linux/audit.h:345
 getname include/linux/fs.h:2498 [inline]
 __do_sys_unlinkat fs/namei.c:5477 [inline]
 __se_sys_unlinkat fs/namei.c:5471 [inline]
 __x64_sys_unlinkat+0xe4/0x130 fs/namei.c:5471
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880559cbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880559cbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880559cbf80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8880559cc000: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880559cc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-out-of-bounds in dtInsertEntry.isra.0+0x139f/0x1670 fs/jfs/jfs_dtree.c:3765
Read of size 4 at addr ffff8880559cbfbc by task syz.6.2038/14202

CPU: 1 UID: 0 PID: 14202 Comm: syz.6.2038 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+0x139f/0x1670 fs/jfs/jfs_dtree.c:3765
 dtSplitPage+0x2bde/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_mkdir+0x67d/0xba0 fs/jfs/namei.c:270
 vfs_mkdir+0x731/0xb60 fs/namei.c:5139
 do_mkdirat+0x442/0x5e0 fs/namei.c:5173
 __do_sys_mkdirat fs/namei.c:5195 [inline]
 __se_sys_mkdirat fs/namei.c:5193 [inline]
 __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:5193
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2f0f38de97
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f2f1023ce68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f2f1023cef0 RCX: 00007f2f0f38de97
RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f2f1023ceb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 14202:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_lru_noprof+0x262/0x770 mm/slub.c:5282
 jfs_alloc_inode+0x25/0x60 fs/jfs/super.c:105
 alloc_inode+0x64/0x240 fs/inode.c:346
 iget_locked+0x1d9/0x6d0 fs/inode.c:1470
 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:1866
 lookup_slow+0x50/0x70 fs/namei.c:1883
 walk_component fs/namei.c:2229 [inline]
 lookup_last fs/namei.c:2730 [inline]
 path_lookupat+0x5e9/0xc40 fs/namei.c:2754
 filename_lookup+0x224/0x5f0 fs/namei.c:2783
 user_path_at+0x3a/0x60 fs/namei.c:3576
 __do_sys_chdir fs/open.c:558 [inline]
 __se_sys_chdir fs/open.c:552 [inline]
 __x64_sys_chdir+0xbe/0x270 fs/open.c:552
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880559cb6f0
 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 [ffff8880559cb6f0, ffff8880559cbf98)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x559c8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888053651f01
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801cb48b40 0000000000000000 0000000000000001
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888053651f01
head: 00fff00000000040 ffff88801cb48b40 0000000000000000 0000000000000001
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888053651f01
head: 00fff00000000003 ffffea0001567201 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 9797, tgid 9796 (syz.2.1338), ts 362147832346, free_ts 113345233137
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
 prep_new_page mm/page_alloc.c:1865 [inline]
 get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab mm/slub.c:3248 [inline]
 new_slab+0x2c3/0x430 mm/slub.c:3302
 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 kmem_cache_alloc_lru_noprof+0x451/0x770 mm/slub.c:5282
 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:1175
 jfs_fill_super+0x6a8/0x1040 fs/jfs/super.c:511
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
 vfs_get_tree+0x8e/0x330 fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount fs/namespace.c:3712 [inline]
 path_mount+0x7bf/0x23a0 fs/namespace.c:4022
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount fs/namespace.c:4201 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4201
page last free pid 5828 tgid 5828 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1406 [inline]
 __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4c/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_noprof+0x25e/0x770 mm/slub.c:5270
 getname_flags.part.0+0x4c/0x550 fs/namei.c:146
 getname_flags+0x93/0xf0 include/linux/audit.h:345
 getname include/linux/fs.h:2498 [inline]
 __do_sys_unlinkat fs/namei.c:5477 [inline]
 __se_sys_unlinkat fs/namei.c:5471 [inline]
 __x64_sys_unlinkat+0xe4/0x130 fs/namei.c:5471
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880559cbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880559cbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880559cbf80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff8880559cc000: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880559cc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
find_entry called with index >= next_index
read_mapping_page failed!
ERROR: (device loop6): txAbort: