================================================================== BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline] BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598 Read of size 8 at addr ffff8880602d00b8 by task kworker/0:4/20812 CPU: 0 UID: 0 PID: 20812 Comm: kworker/0:4 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 Workqueue: events request_firmware_work_func 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 __intf_to_usbdev include/linux/usb.h:752 [inline] uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164 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 Allocated by task 27500: 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] __do_kmalloc_node mm/slub.c:5362 [inline] __kmalloc_node_track_caller_noprof+0x331/0x830 mm/slub.c:5497 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] nlmsg_new include/net/netlink.h:1055 [inline] audit_buffer_alloc kernel/audit.c:1846 [inline] audit_log_start+0x350/0x930 kernel/audit.c:1965 common_lsm_audit+0xb2/0x2b0 security/lsm_audit.c:442 slow_avc_audit+0x186/0x210 security/selinux/avc.c:779 avc_audit security/selinux/include/avc.h:131 [inline] avc_has_perm+0x1a6/0x1e0 security/selinux/avc.c:1198 inode_has_perm+0x166/0x1d0 security/selinux/hooks.c:1692 file_path_has_perm security/selinux/hooks.c:1742 [inline] selinux_file_open+0x39d/0x510 security/selinux/hooks.c:4272 security_file_open+0xd7/0x1e0 security/security.c:2739 do_dentry_open+0x588/0x14d0 fs/open.c:924 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+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 42: 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:2705 [inline] slab_free mm/slub.c:6405 [inline] kfree+0x22b/0x6c0 mm/slub.c:6720 skb_kfree_head net/core/skbuff.c:1077 [inline] skb_free_head+0xb9/0x160 net/core/skbuff.c:1089 skb_release_data+0x6c5/0x8e0 net/core/skbuff.c:1116 skb_release_all net/core/skbuff.c:1191 [inline] __kfree_skb net/core/skbuff.c:1205 [inline] sk_skb_reason_drop+0x102/0x1b0 net/core/skbuff.c:1244 kfree_skb_reason include/linux/skbuff.h:1323 [inline] kfree_skb include/linux/skbuff.h:1332 [inline] kauditd_hold_skb+0x144/0x210 kernel/audit.c:653 kauditd_send_queue+0x232/0x2e0 kernel/audit.c:808 kauditd_thread+0x645/0xb30 kernel/audit.c:932 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 The buggy address belongs to the object at ffff8880602d0000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 184 bytes inside of freed 2048-byte region [ffff8880602d0000, ffff8880602d0800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880602d5000 pfn:0x602d0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88801bc42f00 ffffea000099aa10 ffff88801bc40948 raw: ffff8880602d5000 0000000800080005 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88801bc42f00 ffffea000099aa10 ffff88801bc40948 head: ffff8880602d5000 0000000800080005 00000000f5000000 0000000000000000 head: 00fff00000000003 fffffffffffffe01 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 5526, tgid 5526 (kworker/1:2), ts 334786206872, free_ts 334758541784 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:3294 [inline] allocate_slab mm/slub.c:3408 [inline] new_slab+0xa2/0x650 mm/slub.c:3454 refill_objects+0xe3/0x410 mm/slub.c:7338 refill_sheaf mm/slub.c:2832 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703 alloc_from_pcs mm/slub.c:4801 [inline] slab_alloc_node mm/slub.c:4933 [inline] __do_kmalloc_node mm/slub.c:5361 [inline] __kmalloc_node_track_caller_noprof+0x679/0x830 mm/slub.c:5497 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] mld_newpack.isra.0+0x18e/0xa20 net/ipv6/mcast.c:1789 add_grhead+0x299/0x340 net/ipv6/mcast.c:1900 add_grec+0x1389/0x1930 net/ipv6/mcast.c:2039 mld_send_cr net/ipv6/mcast.c:2164 [inline] mld_ifc_work+0x3c5/0xc10 net/ipv6/mcast.c:2710 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 page last free pid 16205 tgid 16205 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:4612 [inline] slab_alloc_node mm/slub.c:4945 [inline] kmem_cache_alloc_lru_noprof+0x267/0x6a0 mm/slub.c:4978 alloc_inode+0x183/0x250 fs/inode.c:340 iget_locked+0x1d9/0x6d0 fs/inode.c:1477 kernfs_get_inode+0x46/0x470 fs/kernfs/inode.c:252 cgroup_may_write+0x89/0x120 kernel/cgroup/cgroup.c:5321 cgroup_procs_write_permission kernel/cgroup/cgroup.c:5345 [inline] cgroup_attach_permissions+0x1b8/0x5e0 kernel/cgroup/cgroup.c:5368 __cgroup_procs_write+0x2d4/0x730 kernel/cgroup/cgroup.c:5411 cgroup_procs_write+0x26/0x60 kernel/cgroup/cgroup.c:5430 cgroup_file_write+0x1e6/0x8a0 kernel/cgroup/cgroup.c:4316 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 Memory state around the buggy address: ffff8880602cff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880602d0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880602d0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880602d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880602d0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================