memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5082 'syz-executor137' loop0: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: use-after-free in hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 Read of size 4 at addr ffff88801dcfa038 by task syz-executor137/5082 CPU: 1 PID: 5082 Comm: syz-executor137 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 filemap_release_folio+0x13f/0x1b0 mm/filemap.c:3967 block_invalidate_folio+0x4dc/0x5e0 fs/buffer.c:1568 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio+0x31a/0x3f0 mm/truncate.c:179 truncate_inode_pages_range+0x238/0xec0 mm/truncate.c:368 hfsplus_evict_inode+0x1a/0xe0 fs/hfsplus/super.c:168 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput fs/inode.c:1774 [inline] iput+0x52b/0x8e0 fs/inode.c:1760 hfsplus_put_super+0x274/0x3f0 fs/hfsplus/super.c:302 generic_shutdown_super+0x158/0x410 fs/super.c:492 kill_block_super+0x9b/0xf0 fs/super.c:1386 deactivate_locked_super+0x98/0x160 fs/super.c:332 deactivate_super+0xb1/0xd0 fs/super.c:363 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb17/0x2a90 kernel/exit.c:867 do_group_exit+0xd4/0x2a0 kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1021 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f20a31319a9 Code: Unable to access opcode bytes at 0x7f20a313197f. RSP: 002b:00007ffcfcabeea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f20a31a7330 RCX: 00007f20a31319a9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00000000000005f2 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20a31a7330 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Allocated by task 5082: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] hfsplus_btree_open+0x52/0xcd0 fs/hfsplus/btree.c:142 hfsplus_fill_super+0xae5/0x1a30 fs/hfsplus/super.c:473 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5082: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 hfsplus_btree_close+0x1e5/0x380 fs/hfsplus/btree.c:280 hfsplus_put_super+0x224/0x3f0 fs/hfsplus/super.c:300 generic_shutdown_super+0x158/0x410 fs/super.c:492 kill_block_super+0x9b/0xf0 fs/super.c:1386 deactivate_locked_super+0x98/0x160 fs/super.c:332 deactivate_super+0xb1/0xd0 fs/super.c:363 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb17/0x2a90 kernel/exit.c:867 do_group_exit+0xd4/0x2a0 kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1021 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801dcfa000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 56 bytes inside of 4096-byte region [ffff88801dcfa000, ffff88801dcfb000) The buggy address belongs to the physical page: page:ffffea0000773e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1dcf8 head:ffffea0000773e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 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 5082, tgid 5082 (syz-executor137), ts 60847014162, free_ts 54704496280 prep_new_page mm/page_alloc.c:2549 [inline] get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4324 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5590 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2281 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x330 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1061 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] alloc_super+0x52/0xb60 fs/super.c:202 sget+0x114/0x580 fs/super.c:643 mount_bdev+0xfc/0x410 fs/super.c:1330 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1451 [inline] free_pcp_prepare+0x4d0/0x910 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3482 __folio_put_large mm/swap.c:119 [inline] __folio_put+0x109/0x140 mm/swap.c:127 folio_put include/linux/mm.h:1203 [inline] put_page include/linux/mm.h:1272 [inline] __skb_frag_unref include/linux/skbuff.h:3388 [inline] skb_release_data+0x522/0x870 net/core/skbuff.c:843 skb_release_all net/core/skbuff.c:914 [inline] __kfree_skb net/core/skbuff.c:928 [inline] skb_attempt_defer_free+0x309/0x3f0 net/core/skbuff.c:6706 tcp_eat_recv_skb net/ipv4/tcp.c:1638 [inline] tcp_recvmsg_locked+0x124e/0x22b0 net/ipv4/tcp.c:2634 tcp_recvmsg+0x117/0x620 net/ipv4/tcp.c:2680 inet_recvmsg+0x114/0x640 net/ipv4/af_inet.c:861 sock_recvmsg_nosec net/socket.c:995 [inline] sock_recvmsg net/socket.c:1013 [inline] sock_recvmsg net/socket.c:1009 [inline] sock_read_iter+0x348/0x480 net/socket.c:1086 call_read_iter include/linux/fs.h:1846 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7fa/0x930 fs/read_write.c:470 ksys_read+0x1ec/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88801dcf9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801dcf9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801dcfa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801dcfa080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801dcfa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================