On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. (syz.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 14 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 15 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 8 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 9 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 10 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 11 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 12 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 13 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 14 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.0.0,5357,0):ocfs2_get_clusters:634 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_extent_map_get_blocks:681 ERROR: status = -30 (syz.0.0,5357,0):ocfs2_get_block:153 ERROR: get_blocks() failed, inode: 0xffff8880442a4178, block: 15 ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_fault+0xd3/0x3f0 fs/ocfs2/mmap.c:41 Read of size 8 at addr ffff888011558698 by task syz.0.0/5357 CPU: 0 UID: 0 PID: 5357 Comm: syz.0.0 Not tainted syzkaller #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:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 ocfs2_fault+0xd3/0x3f0 fs/ocfs2/mmap.c:41 __do_fault+0x135/0x390 mm/memory.c:5152 do_shared_fault mm/memory.c:5637 [inline] do_fault mm/memory.c:5711 [inline] do_pte_missing mm/memory.c:4234 [inline] handle_pte_fault mm/memory.c:6052 [inline] __handle_mm_fault+0x1847/0x5440 mm/memory.c:6195 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364 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: 0033:0x7f09ca758088 Code: 66 89 74 17 02 88 0f c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 c5 fa 7f 07 c5 fa 7f 4c 17 f0 c3 0f 1f 44 00 00 48 8b 4c 16 f8 48 8b 36 <48> 89 37 48 89 4c 17 f8 c3 62 e1 fe 28 6f 54 16 ff 62 e1 fe 28 6f RSP: 002b:00007ffd7b1f9af8 EFLAGS: 00010246 RAX: 00002000000014c0 RBX: 0000000000000004 RCX: 0031313230386c6e RDX: 0000000000000008 RSI: 0031313230386c6e RDI: 00002000000014c0 RBP: 00007f09ca9d7da0 R08: 00007f09ca5ff030 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000009 R12: 00007f09ca9d609c R13: 00007f09ca9d6090 R14: fffffffffffffffe R15: 00007ffd7b1f9c10 Allocated by task 5359: 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:330 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4191 [inline] slab_alloc_node mm/slub.c:4240 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4247 vm_area_alloc+0x24/0x140 mm/vma_init.c:31 __mmap_new_vma mm/vma.c:2461 [inline] __mmap_region mm/vma.c:2669 [inline] mmap_region+0xdc7/0x20c0 mm/vma.c:2739 do_mmap+0xc45/0x10d0 mm/mmap.c:558 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604 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 15: 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:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2422 [inline] slab_free_after_rcu_debug+0x129/0x2a0 mm/slub.c:4745 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861 handle_softirqs+0x283/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 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:2383 [inline] slab_free mm/slub.c:4695 [inline] kmem_cache_free+0x2f6/0x400 mm/slub.c:4797 remove_vma mm/vma.c:468 [inline] vms_complete_munmap_vmas+0x626/0x8a0 mm/vma.c:1293 __mmap_complete mm/vma.c:2532 [inline] __mmap_region mm/vma.c:2677 [inline] mmap_region+0x11db/0x20c0 mm/vma.c:2739 do_mmap+0xc45/0x10d0 mm/mmap.c:558 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604 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 ffff888011558640 which belongs to the cache vm_area_struct of size 256 The buggy address is located 88 bytes inside of freed 256-byte region [ffff888011558640, ffff888011558740) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11558 memcg:ffff8880119f6881 anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801bae8b40 ffffea0000455100 dead000000000005 raw: 0000000000000000 00000000000c000c 00000000f5000000 ffff8880119f6881 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 4738, tgid 4738 (syslogd), ts 26300332710, free_ts 25276843180 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2492 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2660 new_slab mm/slub.c:2714 [inline] ___slab_alloc+0xbeb/0x1420 mm/slub.c:3901 __slab_alloc mm/slub.c:3992 [inline] __slab_alloc_node mm/slub.c:4067 [inline] slab_alloc_node mm/slub.c:4228 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4247 vm_area_alloc+0x24/0x140 mm/vma_init.c:31 __mmap_new_vma mm/vma.c:2461 [inline] __mmap_region mm/vma.c:2669 [inline] mmap_region+0xdc7/0x20c0 mm/vma.c:2739 do_mmap+0xc45/0x10d0 mm/mmap.c:558 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604 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 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 __free_pages mm/page_alloc.c:5260 [inline] free_reserved_page+0xce/0x120 mm/page_alloc.c:6163 free_reserved_area+0x90/0x190 mm/page_alloc.c:6149 free_init_pages arch/x86/mm/init.c:936 [inline] free_kernel_image_pages+0xa2/0x100 arch/x86/mm/init.c:952 kernel_init+0x31/0x1d0 init/main.c:1478 ret_from_fork+0x436/0x7d0 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: ffff888011558580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888011558600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff888011558680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888011558700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888011558780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================