================================================================== BUG: KASAN: slab-use-after-free in __release_resource+0x276/0x2c0 kernel/resource.c:221 Read of size 8 at addr ffff88804c707938 by task syz.5.4938/31609 CPU: 2 UID: 0 PID: 31609 Comm: syz.5.4938 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 __release_resource+0x276/0x2c0 kernel/resource.c:221 release_resource+0x26/0x40 kernel/resource.c:319 pci_free_resources drivers/pci/remove.c:16 [inline] pci_destroy_dev drivers/pci/remove.c:56 [inline] pci_remove_bus_device+0x2d3/0x3b0 drivers/pci/remove.c:110 pci_stop_and_remove_bus_device_locked+0x1a/0x20 drivers/pci/remove.c:136 remove_store+0x123/0x140 drivers/pci/pci-sysfs.c:523 dev_attr_store+0x58/0x80 drivers/base/core.c:2505 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf702efec Code: Unable to access opcode bytes at 0xf702efc2. RSP: 002b:00000000f541d50c EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080000140 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 20392: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2e5/0x6c0 mm/slub.c:5489 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] kernfs_get_open_node fs/kernfs/file.c:536 [inline] kernfs_fop_open+0x9fa/0xd50 fs/kernfs/file.c:711 do_dentry_open+0x6ab/0x14d0 fs/open.c:947 vfs_open+0x82/0x3f0 fs/open.c:1052 do_open fs/namei.c:4700 [inline] path_openat+0x2873/0x4280 fs/namei.c:4863 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6419: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] slab_free_freelist_hook mm/slub.c:2706 [inline] slab_free_bulk mm/slub.c:6411 [inline] kmem_cache_free_bulk mm/slub.c:7148 [inline] kmem_cache_free_bulk+0x258/0x730 mm/slub.c:7127 kfree_bulk include/linux/slab.h:910 [inline] kvfree_rcu_bulk+0x176/0x190 mm/slab_common.c:1519 kfree_rcu_work+0x122/0x1a0 mm/slab_common.c:1597 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Last potentially related work creation: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 kvfree_call_rcu+0x6a/0x4f0 mm/slab_common.c:1987 kernfs_unlink_open_file+0x3bc/0x4c0 fs/kernfs/file.c:597 kernfs_fop_release+0xe9/0x1f0 fs/kernfs/file.c:776 __fput+0x3ff/0xb50 fs/file_table.c:512 fput_close_sync+0x118/0x250 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804c707900 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 56 bytes inside of freed 128-byte region [ffff88804c707900, ffff88804c707980) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804c707900 pfn:0x4c707 flags: 0x4fff00000000200(workingset|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000200 ffff88801bc42a00 ffffea0001adec90 ffffea0001cfe710 raw: ffff88804c707900 0000000800100003 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 7772, tgid 7770 (syz.0.355), ts 194543715799, free_ts 194404397577 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0xa2/0x640 mm/slub.c:3426 ___slab_alloc+0x5d1/0x800 mm/slub.c:4463 slab_alloc_node mm/slub.c:4908 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_flags_noprof+0x473/0x8b0 mm/slub.c:5528 _kmalloc_flags_noprof mm/slab.h:39 [inline] alloc_slab_obj_exts+0x5a/0x160 mm/slub.c:2149 __memcg_slab_post_alloc_hook+0x3d4/0x1160 mm/memcontrol.c:3587 memcg_slab_post_alloc_hook mm/slub.c:2447 [inline] slab_post_alloc_hook mm/slub.c:4603 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x587/0x6a0 mm/slub.c:4931 sk_prot_alloc+0x60/0x2a0 net/core/sock.c:2246 sk_alloc+0x36/0xe80 net/core/sock.c:2308 inet6_create net/ipv6/af_inet6.c:178 [inline] inet6_create+0x385/0x12b0 net/ipv6/af_inet6.c:105 __sock_create+0x339/0x860 net/socket.c:1651 inet_ctl_sock_create+0x94/0x230 net/ipv4/af_inet.c:1639 tcpv6_net_init+0x31/0xc0 net/ipv6/tcp_ipv6.c:2344 ops_init+0x1e2/0x5f0 net/core/net_namespace.c:137 page last free pid 5456 tgid 5456 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_node_noprof+0x27d/0x6b0 mm/slub.c:4989 __alloc_skb+0x140/0x710 net/core/skbuff.c:704 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_skb_with_frags+0xdd/0x760 net/core/skbuff.c:6775 sock_alloc_send_pskb+0x801/0x980 net/core/sock.c:3013 unix_dgram_sendmsg+0x3c7/0x1810 net/unix/af_unix.c:2137 unix_seqpacket_sendmsg+0x12a/0x1d0 net/unix/af_unix.c:2538 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] sock_write_iter+0x53a/0x5b0 net/socket.c:1241 do_iter_readv_writev+0x6f7/0x930 fs/read_write.c:828 vfs_writev+0x360/0xdd0 fs/read_write.c:1058 do_writev+0x28a/0x340 fs/read_write.c:1104 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804c707800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c707880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804c707900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804c707980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804c707a00: fa fb fb fb fb fb fb fb fb 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