loop1: detected capacity change from 0 to 262144 F2FS-fs (loop1): invalid crc value ================================================================== BUG: KASAN: slab-out-of-bounds in sanity_check_valid_blocks fs/f2fs/segment.h:385 [inline] BUG: KASAN: slab-out-of-bounds in build_sit_entries+0x1b0c/0x1f80 fs/f2fs/segment.c:5060 Read of size 4 at addr ffff88807de88a20 by task syz.1.459/7525 CPU: 1 UID: 0 PID: 7525 Comm: syz.1.459 Not tainted 6.15.0-rc7-next-20250522-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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 sanity_check_valid_blocks fs/f2fs/segment.h:385 [inline] build_sit_entries+0x1b0c/0x1f80 fs/f2fs/segment.c:5060 f2fs_build_segment_manager+0x3112/0x49f0 fs/f2fs/segment.c:5707 f2fs_fill_super+0x45bc/0x6c80 fs/f2fs/super.c:4754 mount_bdev+0x211/0x2c0 fs/super.c:1736 legacy_get_tree+0xfd/0x1a0 fs/fs_context.c:666 vfs_get_tree+0x92/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3869 do_mount fs/namespace.c:4206 [inline] __do_sys_mount fs/namespace.c:4417 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4394 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: 0033:0x7f79ef39010a 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:00007f79f0293e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f79f0293ef0 RCX: 00007f79ef39010a RDX: 0000200000020440 RSI: 0000200000020480 RDI: 00007f79f0293eb0 RBP: 0000200000020440 R08: 00007f79f0293ef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000020480 R13: 00007f79f0293eb0 R14: 0000000000020442 R15: 0000200000000000 Allocated by task 7525: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kvmalloc_node_noprof+0x30d/0x5f0 mm/slub.c:5014 f2fs_kvmalloc fs/f2fs/f2fs.h:3527 [inline] f2fs_kvzalloc fs/f2fs/f2fs.h:3533 [inline] build_sit_info fs/f2fs/segment.c:4779 [inline] f2fs_build_segment_manager+0x1485/0x49f0 fs/f2fs/segment.c:5696 f2fs_fill_super+0x45bc/0x6c80 fs/f2fs/super.c:4754 mount_bdev+0x211/0x2c0 fs/super.c:1736 legacy_get_tree+0xfd/0x1a0 fs/fs_context.c:666 vfs_get_tree+0x92/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3869 do_mount fs/namespace.c:4206 [inline] __do_sys_mount fs/namespace.c:4417 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4394 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 ffff88807de88000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes to the right of allocated 2592-byte region [ffff88807de88000, ffff88807de88a20) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7de88 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801a442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801a442140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea0001f7a201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7525, tgid 7523 (syz.1.459), ts 265858292387, free_ts 265648758220 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:2450 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2618 new_slab mm/slub.c:2672 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3858 __slab_alloc mm/slub.c:3948 [inline] __slab_alloc_node mm/slub.c:4023 [inline] slab_alloc_node mm/slub.c:4184 [inline] __do_kmalloc_node mm/slub.c:4326 [inline] __kvmalloc_node_noprof+0x429/0x5f0 mm/slub.c:5014 f2fs_kvmalloc fs/f2fs/f2fs.h:3527 [inline] f2fs_kvzalloc fs/f2fs/f2fs.h:3533 [inline] build_sit_info fs/f2fs/segment.c:4779 [inline] f2fs_build_segment_manager+0x1485/0x49f0 fs/f2fs/segment.c:5696 f2fs_fill_super+0x45bc/0x6c80 fs/f2fs/super.c:4754 mount_bdev+0x211/0x2c0 fs/super.c:1736 legacy_get_tree+0xfd/0x1a0 fs/fs_context.c:666 vfs_get_tree+0x92/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3869 do_mount fs/namespace.c:4206 [inline] __do_sys_mount fs/namespace.c:4417 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4394 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 5838 tgid 5838 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 discard_slab mm/slub.c:2716 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3185 put_cpu_partial+0x17c/0x250 mm/slub.c:3260 __slab_free+0x2f7/0x400 mm/slub.c:4512 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] __kmalloc_cache_node_noprof+0x1c0/0x3d0 mm/slub.c:4366 kmalloc_node_noprof include/linux/slab.h:928 [inline] __get_vm_area_node+0x13f/0x300 mm/vmalloc.c:3168 __vmalloc_node_range_noprof+0x301/0x12f0 mm/vmalloc.c:3845 __vmalloc_node_noprof mm/vmalloc.c:3948 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4022 __do_replace+0xab/0x980 net/ipv6/netfilter/ip6_tables.c:1063 do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline] do_ip6t_set_ctl+0xa16/0xce0 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101 do_sock_setsockopt+0x25a/0x3e0 net/socket.c:2296 __sys_setsockopt net/socket.c:2321 [inline] __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __x64_sys_setsockopt+0x18b/0x220 net/socket.c:2324 Memory state around the buggy address: ffff88807de88900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807de88980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807de88a00: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807de88a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807de88b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================