================================================================== BUG: KASAN: slab-use-after-free in destroy_device_list+0x195/0x200 fs/f2fs/super.c:1606 Read of size 4 at addr ffff88808c8e177c by task syz-executor.5/8719 CPU: 0 PID: 8719 Comm: syz-executor.5 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 destroy_device_list+0x195/0x200 fs/f2fs/super.c:1606 kill_f2fs_super+0x2c6/0x430 fs/f2fs/super.c:4932 deactivate_locked_super+0xbc/0x1a0 fs/super.c:477 mount_bdev+0x277/0x2d0 fs/super.c:1665 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f211727e4aa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2117f21ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2117f21f80 RCX: 00007f211727e4aa RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 00007f2117f21f40 RBP: 00000000200000c0 R08: 00007f2117f21f80 R09: 0000000001000000 R10: 0000000001000000 R11: 0000000000000202 R12: 0000000020000040 R13: 00007f2117f21f40 R14: 00000000000054f9 R15: 0000000020000140 Allocated by task 8719: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:389 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] f2fs_fill_super+0xfe/0x8e50 fs/f2fs/super.c:4397 mount_bdev+0x1df/0x2d0 fs/super.c:1663 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 8719: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x124/0x360 mm/slub.c:4409 f2fs_fill_super+0x270c/0x8e50 fs/f2fs/super.c:4882 mount_bdev+0x1df/0x2d0 fs/super.c:1663 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff88808c8e0000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 6012 bytes inside of freed 8192-byte region [ffff88808c8e0000, ffff88808c8e2000) The buggy address belongs to the physical page: page:ffffea0002323800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c8e0 head:ffffea0002323800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888013042280 ffffea0001dd2200 0000000000000006 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8124, tgid 8121 (syz-executor.1), ts 394941382703, free_ts 394908724684 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc+0x3b4/0x440 mm/slub.c:3994 kmalloc_array include/linux/slab.h:627 [inline] kcalloc include/linux/slab.h:658 [inline] cache_create_net+0xa0/0x220 net/sunrpc/cache.c:1749 rsc_cache_create_net net/sunrpc/auth_gss/svcauth_gss.c:2058 [inline] gss_svc_init_net+0x69/0x660 net/sunrpc/auth_gss/svcauth_gss.c:2086 ops_init+0xb9/0x650 net/core/net_namespace.c:136 setup_net+0x422/0xa40 net/core/net_namespace.c:339 copy_net_ns+0x2f1/0x660 net/core/net_namespace.c:495 create_new_namespaces+0x3ea/0xb10 kernel/nsproxy.c:110 copy_namespaces+0x464/0x560 kernel/nsproxy.c:179 copy_process+0x335d/0x97b0 kernel/fork.c:2499 kernel_clone+0xfd/0x930 kernel/fork.c:2901 page last free pid 5083 tgid 5083 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x51f/0xb10 mm/page_alloc.c:2346 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486 __put_partials+0x14c/0x160 mm/slub.c:2922 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:324 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3867 ptlock_alloc+0x1f/0x70 mm/memory.c:6270 ptlock_init include/linux/mm.h:2906 [inline] pagetable_pte_ctor include/linux/mm.h:2929 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:71 [inline] pte_alloc_one+0x74/0x370 arch/x86/mm/pgtable.c:33 __pte_alloc+0x6e/0x3b0 mm/memory.c:440 copy_pte_range mm/memory.c:1048 [inline] copy_pmd_range mm/memory.c:1187 [inline] copy_pud_range mm/memory.c:1224 [inline] copy_p4d_range mm/memory.c:1248 [inline] copy_page_range+0x1e53/0x3c50 mm/memory.c:1346 dup_mmap kernel/fork.c:745 [inline] dup_mm kernel/fork.c:1685 [inline] copy_mm kernel/fork.c:1734 [inline] copy_process+0x5c4a/0x97b0 kernel/fork.c:2496 kernel_clone+0xfd/0x930 kernel/fork.c:2901 __do_sys_clone+0xba/0x100 kernel/fork.c:3044 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff88808c8e1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808c8e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88808c8e1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88808c8e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808c8e1800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================