loop0: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= XFS (loop0): Mounting V5 Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791 ================================================================== BUG: KASAN: slab-out-of-bounds in crc32c_arch lib/crc/x86/crc32.h:90 [inline] BUG: KASAN: slab-out-of-bounds in crc32c+0xcd/0x480 lib/crc/crc32-main.c:86 Read of size 8 at addr ffff888040935600 by task syz.0.0/5344 CPU: 0 UID: 0 PID: 5344 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+0xe8/0x150 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 crc32c_arch lib/crc/x86/crc32.h:90 [inline] crc32c+0xcd/0x480 lib/crc/crc32-main.c:86 xlog_cksum+0x93/0x100 fs/xfs/xfs_log.c:1560 xlog_recover_process+0x90/0x2f0 fs/xfs/xfs_log_recover.c:2888 xlog_do_recovery_pass+0x9cd/0xc30 fs/xfs/xfs_log_recover.c:3238 xlog_verify_head+0x136/0x440 fs/xfs/xfs_log_recover.c:1058 xlog_find_tail+0x5ca/0x840 fs/xfs/xfs_log_recover.c:1315 xlog_recover+0x4b/0x3e0 fs/xfs/xfs_log_recover.c:3422 xfs_log_mount+0x253/0x3e0 fs/xfs/xfs_log.c:667 xfs_mountfs+0xe5e/0x22c0 fs/xfs/xfs_mount.c:1031 xfs_fs_fill_super+0x11f1/0x1640 fs/xfs/xfs_super.c:1960 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8c56590f6a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f8c574d9e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f8c574d9ef0 RCX: 00007f8c56590f6a RDX: 0000200000000500 RSI: 0000200000000200 RDI: 00007f8c574d9eb0 RBP: 0000200000000500 R08: 00007f8c574d9ef0 R09: 0000000002218a5d R10: 0000000002218a5d R11: 0000000000000246 R12: 0000200000000200 R13: 00007f8c574d9eb0 R14: 00000000000096bf R15: 0000200000000380 Allocated by task 5344: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kvmalloc_node_noprof+0x5d5/0x920 mm/slub.c:7136 xlog_do_recovery_pass+0x106/0xc30 fs/xfs/xfs_log_recover.c:3019 xlog_verify_head+0x136/0x440 fs/xfs/xfs_log_recover.c:1058 xlog_find_tail+0x5ca/0x840 fs/xfs/xfs_log_recover.c:1315 xlog_recover+0x4b/0x3e0 fs/xfs/xfs_log_recover.c:3422 xfs_log_mount+0x253/0x3e0 fs/xfs/xfs_log.c:667 xfs_mountfs+0xe5e/0x22c0 fs/xfs/xfs_mount.c:1031 xfs_fs_fill_super+0x11f1/0x1640 fs/xfs/xfs_super.c:1960 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888040935400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of allocated 512-byte region [ffff888040935400, ffff888040935600) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x40934 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801a441c80 ffffea0001052b00 dead000000000003 raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801a441c80 ffffea0001052b00 dead000000000003 head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000001 ffffea0001024d01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 25307556649, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857 prep_new_page mm/page_alloc.c:1865 [inline] get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab+0x86/0x3b0 mm/slub.c:3248 new_slab mm/slub.c:3302 [inline] ___slab_alloc+0xe53/0x1820 mm/slub.c:4656 __slab_alloc+0x65/0x100 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x47d/0x800 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] net_alloc_generic net/core/net_namespace.c:76 [inline] net_assign_generic net/core/net_namespace.c:96 [inline] ops_init+0x1eb/0x5c0 net/core/net_namespace.c:131 __register_pernet_operations net/core/net_namespace.c:1312 [inline] register_pernet_operations+0x336/0x800 net/core/net_namespace.c:1389 register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1430 nfnetlink_queue_init+0x11/0xb0 net/netfilter/nfnetlink_queue.c:1784 do_one_initcall+0x1f1/0x800 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x2a7/0x3d0 init/main.c:1688 page_owner free stack trace missing Memory state around the buggy address: ffff888040935500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888040935580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888040935600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888040935680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888040935700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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