ERROR: (device loop5): duplicateIXtree: ERROR: (device loop5): remounting filesystem as read-only ================================================================== BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:229 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784 Read of size 8 at addr ffff88805fe439d8 by task syz.5.181/7692 CPU: 1 UID: 0 PID: 7692 Comm: syz.5.181 Not tainted 6.14.0-rc5-syzkaller-00016-g48a5eed9ad58 #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 drop_metapage fs/jfs/jfs_metapage.c:229 [inline] release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_put fs/jfs/xattr.c:618 [inline] __jfs_setxattr+0xfac/0x1310 fs/jfs/xattr.c:787 jfs_initxattrs+0x18f/0x270 fs/jfs/xattr.c:1035 security_inode_init_security+0x29c/0x480 security/security.c:1852 jfs_init_security+0xa9/0x110 fs/jfs/xattr.c:1047 jfs_mkdir+0x2c7/0xba0 fs/jfs/namei.c:240 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4313 do_mkdirat+0x264/0x3a0 fs/namei.c:4336 __do_sys_mkdirat fs/namei.c:4351 [inline] __se_sys_mkdirat fs/namei.c:4349 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4349 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: 0033:0x7f929af8d169 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:00007f929be3e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f929b1a5fa0 RCX: 00007f929af8d169 RDX: 0000000000000000 RSI: 0000400000001dc0 RDI: ffffffffffffff9c RBP: 00007f929b00e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f929b1a5fa0 R15: 00007ffe2d736338 Allocated by task 7692: 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:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 mempool_alloc_noprof+0x197/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652 ea_get+0xbdc/0x1340 fs/jfs/xattr.c:528 __jfs_setxattr+0x5d4/0x1310 fs/jfs/xattr.c:722 jfs_initxattrs+0x18f/0x270 fs/jfs/xattr.c:1035 security_inode_init_security+0x29c/0x480 security/security.c:1852 jfs_init_security+0xa9/0x110 fs/jfs/xattr.c:1047 jfs_mkdir+0x2c7/0xba0 fs/jfs/namei.c:240 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4313 do_mkdirat+0x264/0x3a0 fs/namei.c:4336 __do_sys_mkdirat fs/namei.c:4351 [inline] __se_sys_mkdirat fs/namei.c:4349 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4349 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 7711: 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:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4711 free_metapage fs/jfs/jfs_metapage.c:197 [inline] metapage_release_folio+0x412/0x540 fs/jfs/jfs_metapage.c:552 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x203/0x300 mm/truncate.c:146 truncate_inode_pages_range+0x2e5/0x10e0 mm/truncate.c:326 jfs_reconfigure+0x5ef/0x9d0 fs/jfs/super.c:406 reconfigure_super+0x43a/0x870 fs/super.c:1083 do_remount fs/namespace.c:3100 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3879 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 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 The buggy address belongs to the object at ffff88805fe439b0 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff88805fe439b0, ffff88805fe43a68) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fe43 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff8881472c7b40 ffffea0001e62840 0000000000000002 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6429, tgid 6428 (syz.2.62), ts 92938446749, free_ts 92905594285 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_noprof+0x268/0x380 mm/slub.c:4171 mempool_alloc_noprof+0x197/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652 diReadSpecial+0x25d/0x680 fs/jfs/jfs_imap.c:447 jfs_mount+0x75/0x830 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x6b9/0xd90 fs/jfs/super.c:523 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 page last free pid 24 tgid 24 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 pagetable_free include/linux/mm.h:2917 [inline] pagetable_dtor_free include/linux/mm.h:3015 [inline] __tlb_remove_table+0x33c/0x420 include/asm-generic/tlb.h:216 __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x76/0xf0 mm/mmu_gather.c:282 rcu_do_batch kernel/rcu/tree.c:2546 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88805fe43880: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 ffff88805fe43900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc >ffff88805fe43980: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ^ ffff88805fe43a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff88805fe43a80: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb ==================================================================