ERROR: (device loop3): txAbort: read_mapping_page failed! ERROR: (device loop3): txAbort: ================================================================== BUG: KASAN: slab-out-of-bounds in dtSplitPage+0xd00/0x27e8 fs/jfs/jfs_dtree.c:-1 Read of size 1 at addr ffff0000e2561b55 by task syz.3.339/6298 CPU: 0 PID: 6298 Comm: syz.3.339 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348 dtSplitPage+0xd00/0x27e8 fs/jfs/jfs_dtree.c:-1 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0xc0c/0x55ac fs/jfs/jfs_dtree.c:871 jfs_mknod+0x374/0x7b0 fs/jfs/namei.c:1408 vfs_mknod+0x3c4/0x44c fs/namei.c:3985 do_mknodat+0x320/0x54c fs/namei.c:-1 __do_sys_mknodat fs/namei.c:4063 [inline] __se_sys_mknodat fs/namei.c:4060 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4060 __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 6298: 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 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0x100/0x954 kernel/rcu/tree.c:2849 destroy_inode fs/inode.c:316 [inline] evict+0x748/0x810 fs/inode.c:720 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 diFreeSpecial+0x78/0x100 fs/jfs/jfs_imap.c:552 jfs_umount+0x1cc/0x328 fs/jfs/jfs_umount.c:91 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1182 __cleanup_mnt+0x20/0x30 fs/namespace.c:1189 task_work_run+0x1ec/0x270 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19a8 kernel/exit.c:880 do_group_exit+0x194/0x22c kernel/exit.c:1022 get_signal+0x11d0/0x1310 kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x340/0x2b0c arch/arm64/kernel/signal.c:1134 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 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 ffff0000e2561280 which belongs to the cache jfs_ip of size 2240 The buggy address is located 21 bytes to the right of 2240-byte region [ffff0000e2561280, ffff0000e2561b40) The buggy address belongs to the physical page: page:00000000539de667 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x122560 head:00000000539de667 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000d4cf2701 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4b51200 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000d4cf2701 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e2561a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e2561a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e2561b00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff0000e2561b80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff0000e2561c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== read_mapping_page failed! ERROR: (device loop3): txAbort: read_mapping_page failed! bread failed! jfs_create: dtInsert returned -EIO ERROR: (device loop3): txAbort: