read_mapping_page failed! ERROR: (device loop4): txAbort: jfs_create: dtSearch returned -17 ================================================================== BUG: KASAN: slab-out-of-bounds in dtInsertEntry+0xb0c/0xf60 fs/jfs/jfs_dtree.c:3753 Read of size 4 at addr ffff0000f4a3498c by task syz.4.26/4500 CPU: 0 PID: 4500 Comm: syz.4.26 Not tainted 6.1.140-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x220 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:427 kasan_report+0xa8/0x100 mm/kasan/report.c:531 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350 dtInsertEntry+0xb0c/0xf60 fs/jfs/jfs_dtree.c:3753 dtSplitPage+0x1c84/0x27e8 fs/jfs/jfs_dtree.c:1596 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0xc0c/0x55ac fs/jfs/jfs_dtree.c:871 jfs_create+0x588/0x8c4 fs/jfs/namei.c:137 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x112c/0x2680 fs/namei.c:3780 do_filp_open+0x174/0x344 fs/namei.c:3810 do_sys_openat2+0x128/0x3d8 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 4500: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x43c 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+0x1b0/0x298 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x178/0x7c4 fs/inode.c:1373 jfs_iget+0x30/0x374 fs/jfs/inode.c:29 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1467 __lookup_slow+0x24c/0x370 fs/namei.c:1690 lookup_slow+0x5c/0x80 fs/namei.c:1707 walk_component+0x270/0x364 fs/namei.c:1998 lookup_last fs/namei.c:2455 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2479 filename_lookup+0x190/0x42c fs/namei.c:2508 user_path_at_empty+0x5c/0x84 fs/namei.c:2905 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:514 [inline] __se_sys_chdir fs/open.c:508 [inline] __arm64_sys_chdir+0xb4/0x26c fs/open.c:508 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000f4a340c0 which belongs to the cache jfs_ip of size 2240 The buggy address is located 12 bytes to the right of 2240-byte region [ffff0000f4a340c0, ffff0000f4a34980) The buggy address belongs to the physical page: page:000000005666d87f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x134a30 head:000000005666d87f order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000f0869601 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6f40f00 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000f0869601 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f4a34880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f4a34900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000f4a34980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000f4a34a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f4a34a80: 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 loop4): txAbort: