OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 OCFS2: ERROR (device loop0): int ocfs2_get_clusters_nocache(struct inode *, struct buffer_head *, u32, unsigned int *, struct ocfs2_extent_rec *, unsigned int *): Inode 17058 has bad extent record (0, 1, 0) On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5329,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5329,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff888043a7c178, block: 0 ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_fault+0xd3/0x3f0 fs/ocfs2/mmap.c:41 Read of size 8 at addr ffff888011467418 by task syz.0.0/5329 CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.16.0-rc2-syzkaller-00378-gb67ec639010f #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_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 ocfs2_fault+0xd3/0x3f0 fs/ocfs2/mmap.c:41 __do_fault+0x138/0x390 mm/memory.c:5189 do_read_fault mm/memory.c:5610 [inline] do_fault mm/memory.c:5744 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6089 [inline] __handle_mm_fault+0x37ed/0x5620 mm/memory.c:6232 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6401 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:72 [inline] RIP: 0010:strncpy_from_user+0x1bc/0x290 lib/strncpy_from_user.c:130 Code: c1 e8 03 49 01 c4 e9 8d 00 00 00 e8 ae 0b ca fc 48 f7 dd 49 89 ec 48 8b 1c 24 31 ff 4c 89 ee e8 7a 10 ca fc 49 83 ed 01 72 44 <43> 8a 2c 27 4a 8d 3c 23 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 RSP: 0018:ffffc9000d6e7d30 EFLAGS: 00050212 RAX: ffffffff84f64186 RBX: ffff8880337e4420 RCX: ffff88803ecfa440 RDX: 0000000000000002 RSI: 0000000000000fe0 RDI: 0000000000000000 RBP: fffffffffffffff8 R08: ffff8880337e53ff R09: 1ffff110066fca7f R10: dffffc0000000000 R11: ffffed10066fca80 R12: 0000000000000000 R13: 0000000000000fdf R14: 0000000000000fe0 R15: 0000200000000140 getname_flags+0xf3/0x540 fs/namei.c:157 getname include/linux/fs.h:2907 [inline] do_sys_openat2+0xbc/0x1c0 fs/open.c:1431 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: 0033:0x7f123c98e929 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:00007f1238df5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f123cbb6080 RCX: 00007f123c98e929 RDX: 0000000000080c00 RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007f123ca10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f123cbb6080 R15: 00007ffd97f0e078 Allocated by task 5328: 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_noprof+0x1c1/0x3c0 mm/slub.c:4204 vm_area_alloc+0x24/0x140 mm/vma_init.c:31 __mmap_new_vma mm/vma.c:2452 [inline] __mmap_region mm/vma.c:2622 [inline] mmap_region+0xcc7/0x1f30 mm/vma.c:2692 do_mmap+0xc45/0x10d0 mm/mmap.c:561 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607 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 Freed by task 5328: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free_after_rcu_debug+0x129/0x2a0 mm/slub.c:4693 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x2f6/0x400 mm/slub.c:4745 remove_vma mm/vma.c:465 [inline] vms_complete_munmap_vmas+0x626/0x8a0 mm/vma.c:1288 __mmap_complete mm/vma.c:2519 [inline] __mmap_region mm/vma.c:2630 [inline] mmap_region+0x161d/0x1f30 mm/vma.c:2692 do_mmap+0xc45/0x10d0 mm/mmap.c:561 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579 ksys_mmap_pgoff+0x587/0x760 mm/mmap.c:607 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 ffff8880114673c0 which belongs to the cache vm_area_struct of size 256 The buggy address is located 88 bytes inside of freed 256-byte region [ffff8880114673c0, ffff8880114674c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11467 memcg:ffff888011864d81 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88803040eb40 dead000000000100 dead000000000122 raw: 0000000000000000 00000000000c000c 00000000f5000000 ffff888011864d81 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5019, tgid 5019 (dhcpcd), ts 59163543644, free_ts 57442814588 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+0x21e4/0x22c0 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_noprof+0x283/0x3c0 mm/slub.c:4204 vm_area_dup+0x2b/0x680 mm/vma_init.c:122 dup_mmap+0x90c/0x1ac0 mm/mmap.c:1784 dup_mm kernel/fork.c:1477 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1529 copy_process+0x1706/0x3c00 kernel/fork.c:2169 kernel_clone+0x21e/0x870 kernel/fork.c:2599 __do_sys_clone kernel/fork.c:2742 [inline] __se_sys_clone kernel/fork.c:2726 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726 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 page last free pid 15 tgid 15 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 pagetable_free include/linux/mm.h:2879 [inline] pagetable_dtor_free include/linux/mm.h:2977 [inline] __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:220 __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888011467300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888011467380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff888011467400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888011467480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888011467500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 49 01 c4 add %rax,%r12 6: e9 8d 00 00 00 jmp 0x98 b: e8 ae 0b ca fc call 0xfcca0bbe 10: 48 f7 dd neg %rbp 13: 49 89 ec mov %rbp,%r12 16: 48 8b 1c 24 mov (%rsp),%rbx 1a: 31 ff xor %edi,%edi 1c: 4c 89 ee mov %r13,%rsi 1f: e8 7a 10 ca fc call 0xfcca109e 24: 49 83 ed 01 sub $0x1,%r13 28: 72 44 jb 0x6e * 2a: 43 8a 2c 27 mov (%r15,%r12,1),%bpl <-- trapping instruction 2e: 4a 8d 3c 23 lea (%rbx,%r12,1),%rdi 32: 48 89 f8 mov %rdi,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 48 rex.W 3a: b9 00 00 00 00 mov $0x0,%ecx