loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: slab-out-of-bounds in dtReadFirst+0x52b/0xcb0 fs/jfs/jfs_dtree.c:3108 Read of size 4 at addr ffff8880443bc028 by task syz.0.0/5332 CPU: 0 UID: 0 PID: 5332 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-09584-g7d06015d936c #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 addressPXD fs/jfs/jfs_types.h:80 [inline] dtReadFirst+0x52b/0xcb0 fs/jfs/jfs_dtree.c:3108 jfs_readdir+0x8f3/0x4010 fs/jfs/jfs_dtree.c:2821 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:65 iterate_dir+0x5a9/0x760 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:403 [inline] __se_sys_getdents64+0x1e4/0x4c0 fs/readdir.c:389 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faeb6d8d169 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:00007faeb7c04038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007faeb6fa5fa0 RCX: 00007faeb6d8d169 RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000008 RBP: 00007faeb6e0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007faeb6fa5fa0 R15: 00007ffe4977f418 Allocated by task 5332: 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:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4138 [inline] slab_alloc_node mm/slub.c:4187 [inline] kmem_cache_alloc_lru_noprof+0x1e5/0x390 mm/slub.c:4206 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x69/0x1b0 fs/inode.c:346 iget_locked+0xf1/0x570 fs/inode.c:1439 jfs_iget+0x23/0x3e0 fs/jfs/inode.c:29 jfs_lookup+0x239/0x440 fs/jfs/namei.c:1469 __lookup_slow+0x2b1/0x400 fs/namei.c:1807 lookup_slow+0x53/0x70 fs/namei.c:1824 walk_component+0x2f4/0x420 fs/namei.c:2128 lookup_last fs/namei.c:2626 [inline] path_lookupat+0x169/0x440 fs/namei.c:2650 filename_lookup+0x290/0x670 fs/namei.c:2679 filename_setxattr+0xb9/0x480 fs/xattr.c:660 path_setxattrat+0x3f7/0x4c0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880443bb750 which belongs to the cache jfs_ip of size 2232 The buggy address is located 32 bytes to the right of allocated 2232-byte region [ffff8880443bb750, ffff8880443bc008) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x443b8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88803d4b9101 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff888033574a00 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff88803d4b9101 head: 04fff00000000040 ffff888033574a00 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff88803d4b9101 head: 04fff00000000003 ffffea000110ee01 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 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5332, tgid 5331 (syz.0.0), ts 68627380397, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x3695/0x37e0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x2c5/0x7b0 mm/page_alloc.c:4740 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2446 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2610 new_slab mm/slub.c:2663 [inline] ___slab_alloc+0xc3b/0x1500 mm/slub.c:3849 __slab_alloc+0x58/0xa0 mm/slub.c:3939 __slab_alloc_node mm/slub.c:4014 [inline] slab_alloc_node mm/slub.c:4175 [inline] kmem_cache_alloc_lru_noprof+0x274/0x390 mm/slub.c:4206 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x69/0x1b0 fs/inode.c:346 new_inode+0x22/0x180 fs/inode.c:1145 jfs_fill_super+0x570/0xd90 fs/jfs/super.c:511 get_tree_bdev_flags+0x490/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1759 do_new_mount+0x2cf/0xb70 fs/namespace.c:3878 do_mount fs/namespace.c:4218 [inline] __do_sys_mount fs/namespace.c:4429 [inline] __se_sys_mount+0x38c/0x400 fs/namespace.c:4406 page_owner free stack trace missing Memory state around the buggy address: ffff8880443bbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880443bbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880443bc000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880443bc080: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880443bc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================