loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3428 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x16b4/0x21b0 fs/jfs/jfs_dtree.c:645 Read of size 1 at addr ffff88805bd7402c by task syz.0.143/7130 CPU: 1 UID: 0 PID: 7130 Comm: syz.0.143 Not tainted 6.15.0-syzkaller-11802-g1af80d00e1e0 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 ciCompare fs/jfs/jfs_dtree.c:3428 [inline] dtSearch+0x16b4/0x21b0 fs/jfs/jfs_dtree.c:645 jfs_lookup+0x155/0x380 fs/jfs/namei.c:1461 lookup_open fs/namei.c:3686 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0x1101/0x3830 fs/namei.c:4043 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 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+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f063b18e929 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:00007f063c0aa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f063b3b5fa0 RCX: 00007f063b18e929 RDX: 0000000000008400 RSI: 0000200000008600 RDI: ffffffffffffff9c RBP: 00007f063b210b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f063b3b5fa0 R15: 00007ffdd1f6fc88 Allocated by task 7130: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4216 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 iget_locked+0xf0/0x570 fs/inode.c:1439 jfs_iget+0x24/0x3e0 fs/jfs/inode.c:29 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469 lookup_one_qstr_excl_raw+0x115/0x280 fs/namei.c:1689 lookup_one_qstr_excl fs/namei.c:1711 [inline] do_renameat2+0x401/0xc50 fs/namei.c:5229 __do_sys_rename fs/namei.c:5324 [inline] __se_sys_rename fs/namei.c:5322 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5322 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805bd73750 which belongs to the cache jfs_ip of size 2232 The buggy address is located 36 bytes to the right of allocated 2232-byte region [ffff88805bd73750, ffff88805bd74008) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5bd70 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880318fc401 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888142abe500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff8880318fc401 head: 00fff00000000040 ffff888142abe500 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff8880318fc401 head: 00fff00000000003 ffffea00016f5c01 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 7130, tgid 7129 (syz.0.143), ts 164053420942, free_ts 149900125226 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] kmem_cache_alloc_lru_noprof+0x288/0x3d0 mm/slub.c:4216 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 jfs_fill_super+0x569/0xd90 fs/jfs/super.c:511 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1679 vfs_get_tree+0x92/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3856 do_mount fs/namespace.c:4193 [inline] __do_sys_mount fs/namespace.c:4404 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 page last free pid 5922 tgid 5922 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706 discard_slab mm/slub.c:2717 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3186 put_cpu_partial+0x17c/0x250 mm/slub.c:3261 __slab_free+0x2f7/0x400 mm/slub.c:4513 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 alloc_extent_state+0x22/0x2f0 fs/btrfs/extent-io-tree.c:153 set_extent_bit+0x270/0x2180 fs/btrfs/extent-io-tree.c:1078 btrfs_set_extent_bit+0x38/0x50 fs/btrfs/extent-io-tree.c:1296 pin_down_extent fs/btrfs/extent-tree.c:2606 [inline] btrfs_free_tree_block+0x96c/0xcf0 fs/btrfs/extent-tree.c:-1 btrfs_force_cow_block+0xf77/0x1e10 fs/btrfs/ctree.c:555 btrfs_cow_block+0x40a/0x830 fs/btrfs/ctree.c:688 btrfs_search_slot+0xcd7/0x2d90 fs/btrfs/ctree.c:2088 btrfs_lookup_file_extent+0xd8/0x120 fs/btrfs/file-item.c:265 Memory state around the buggy address: ffff88805bd73f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805bd73f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805bd74000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805bd74080: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805bd74100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================