find_entry called with index >= next_index ================================================================== BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 Read of size 1 at addr ffff88805cb22dd5 by task syz-executor.3/8479 CPU: 1 PID: 8479 Comm: syz-executor.3 Not tainted 6.10.0-rc4-syzkaller-00148-g50736169ecc8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67 iterate_dir+0x65e/0x820 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe04607cf29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe046e030c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fe0461b3f80 RCX: 00007fe04607cf29 RDX: 0000000000001000 RSI: 0000000020000f80 RDI: 0000000000000005 RBP: 00007fe0460ec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe0461b3f80 R15: 00007fff6e4c5ca8 Allocated by task 7475: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4020 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 diReadSpecial+0x52/0x680 fs/jfs/jfs_imap.c:423 jfs_mount+0x28b/0x830 fs/jfs/jfs_mount.c:138 jfs_fill_super+0x59c/0xc50 fs/jfs/super.c:556 mount_bdev+0x20a/0x2d0 fs/super.c:1659 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 7515: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4512 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2809 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3072 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3176 jfs_umount+0x1cb/0x3a0 fs/jfs/jfs_umount.c:73 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1676 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805cb22500 which belongs to the cache jfs_ip of size 2240 The buggy address is located 21 bytes to the right of allocated 2240-byte region [ffff88805cb22500, ffff88805cb22dc0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805cb21280 pfn:0x5cb20 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888063e2fe01 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888019b64b40 0000000000000000 0000000000000001 raw: ffff88805cb21280 00000000800d0006 00000001ffffefff ffff888063e2fe01 head: 00fff00000000040 ffff888019b64b40 0000000000000000 0000000000000001 head: ffff88805cb21280 00000000800d0006 00000001ffffefff ffff888063e2fe01 head: 00fff00000000003 ffffea000172c801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6115, tgid 6114 (syz-executor.3), ts 131427452097, free_ts 70017735731 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4020 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 jfs_fill_super+0x408/0xc50 fs/jfs/super.c:544 mount_bdev+0x20a/0x2d0 fs/super.c:1659 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 page last free pid 5097 tgid 5097 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0xf12/0x19c0 mm/page_alloc.c:2632 folios_put_refs+0x93a/0xa60 mm/swap.c:1024 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x6de/0x1df0 mm/shmem.c:1005 shmem_truncate_range mm/shmem.c:1114 [inline] shmem_evict_inode+0x29b/0xa60 mm/shmem.c:1242 evict+0x2a8/0x630 fs/inode.c:667 __dentry_kill+0x20d/0x630 fs/dcache.c:603 dput+0x19f/0x2b0 fs/dcache.c:845 __fput+0x68c/0x8b0 fs/file_table.c:430 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88805cb22c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805cb22d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805cb22d80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88805cb22e00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88805cb22e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================