loop1: 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+0x512/0xc50 fs/jfs/jfs_dtree.c:3107 Read of size 4 at addr ffff88807d1bd098 by task syz.1.213/7660 CPU: 1 UID: 0 PID: 7660 Comm: syz.1.213 Not tainted 6.14.0-rc4-syzkaller-00090-gdd83757f6e68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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+0x512/0xc50 fs/jfs/jfs_dtree.c:3107 jfs_readdir+0x87a/0x3cb0 fs/jfs/jfs_dtree.c:2820 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:65 iterate_dir+0x5a9/0x760 fs/readdir.c:108 get_name fs/exportfs/expfs.c:325 [inline] exportfs_get_name+0x5b7/0x720 fs/exportfs/expfs.c:36 reconnect_one fs/exportfs/expfs.c:142 [inline] reconnect_path+0x267/0x750 fs/exportfs/expfs.c:222 exportfs_decode_fh_raw+0x314/0x730 fs/exportfs/expfs.c:485 do_handle_to_path+0xba/0x1b0 fs/fhandle.c:257 handle_to_path fs/fhandle.c:385 [inline] do_handle_open+0x88d/0xb00 fs/fhandle.c:403 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: 0033:0x7f235538d169 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:00007f23561fc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007f23555a5fa0 RCX: 00007f235538d169 RDX: 0000000000000000 RSI: 0000400000000080 RDI: 0000000000000004 RBP: 00007f235540e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f23555a5fa0 R15: 00007ffd3217a748 The buggy address belongs to the object at ffff88807d1bc9c0 which belongs to the cache jfs_ip of size 2232 The buggy address is located 1752 bytes inside of allocated 2232-byte region [ffff88807d1bc9c0, ffff88807d1bd278) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d1b8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880324ff601 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801deb8a00 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff8880324ff601 head: 00fff00000000040 ffff88801deb8a00 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff8880324ff601 head: 00fff00000000003 ffffea0001f46e01 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_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5967, tgid 5966 (syz.2.12), ts 87021412340, free_ts 86949550830 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+0x3651/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4183 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 jfs_fill_super+0x570/0xd90 fs/jfs/super.c:511 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 page last free pid 5824 tgid 5824 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe04/0x10e0 mm/page_alloc.c:2660 __slab_free+0x2c2/0x380 mm/slub.c:4520 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 getname_flags+0xb7/0x540 fs/namei.c:139 user_path_at+0x24/0x60 fs/namei.c:3071 ksys_umount fs/namespace.c:2071 [inline] __do_sys_umount fs/namespace.c:2079 [inline] __se_sys_umount fs/namespace.c:2077 [inline] __x64_sys_umount+0xf1/0x170 fs/namespace.c:2077 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 Memory state around the buggy address: ffff88807d1bcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d1bd000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807d1bd080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807d1bd100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d1bd180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================