================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] BUG: KASAN: slab-use-after-free in usb_anchor_suspend_wakeups drivers/usb/core/urb.c:927 [inline] BUG: KASAN: slab-use-after-free in usb_anchor_suspend_wakeups+0x28/0x40 drivers/usb/core/urb.c:924 Write of size 4 at addr ffff88802582d910 by task ksoftirqd/1/29 CPU: 1 UID: 0 PID: 29 Comm: ksoftirqd/1 Not tainted 6.13.0-rc3-syzkaller-g8faabc041a00 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] usb_anchor_suspend_wakeups drivers/usb/core/urb.c:927 [inline] usb_anchor_suspend_wakeups+0x28/0x40 drivers/usb/core/urb.c:924 __usb_hcd_giveback_urb+0x223/0x6e0 drivers/usb/core/hcd.c:1636 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734 dummy_timer+0x17f7/0x3960 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1820 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561 run_ksoftirqd kernel/softirq.c:950 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:942 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 6561: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] usbtmc_open+0xa6/0x9b0 drivers/usb/class/usbtmc.c:175 usb_open+0x186/0x220 drivers/usb/core/file.c:47 chrdev_open+0x237/0x6a0 fs/char_dev.c:414 do_dentry_open+0xf59/0x1ea0 fs/open.c:945 vfs_open+0x82/0x3f0 fs/open.c:1075 do_open fs/namei.c:3828 [inline] path_openat+0x1e6a/0x2d60 fs/namei.c:3987 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6561: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x14f/0x4b0 mm/slub.c:4761 usbtmc_release+0x271/0x380 drivers/usb/class/usbtmc.c:261 __fput+0x3f8/0xb60 fs/file_table.c:450 task_work_run+0x14e/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802582d800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of freed 1024-byte region [ffff88802582d800, ffff88802582dc00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802582f800 pfn:0x25828 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 ffff88801b042dc0 ffffea0000d65a10 ffffea000048ba10 raw: ffff88802582f800 000000000010000f 00000001f5000000 0000000000000000 head: 00fff00000000240 ffff88801b042dc0 ffffea0000d65a10 ffffea000048ba10 head: ffff88802582f800 000000000010000f 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000960a01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6325, tgid 6325 (syz-executor), ts 76712693909, free_ts 76695464245 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xd7d/0x17a0 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_node_track_caller_noprof+0x2f1/0x510 mm/slub.c:4317 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] nlmsg_new include/net/netlink.h:1018 [inline] inet6_rt_notify+0xc7/0x260 net/ipv6/route.c:6195 fib6_add_rt2node net/ipv6/ip6_fib.c:1259 [inline] fib6_add+0x251d/0x4b20 net/ipv6/ip6_fib.c:1488 __ip6_ins_rt net/ipv6/route.c:1317 [inline] ip6_route_add+0x8d/0x1c0 net/ipv6/route.c:3857 addrconf_prefix_route+0x2fe/0x510 net/ipv6/addrconf.c:2486 fixup_permanent_addr net/ipv6/addrconf.c:3622 [inline] addrconf_permanent_addr net/ipv6/addrconf.c:3646 [inline] addrconf_notify+0x12bb/0x19c0 net/ipv6/addrconf.c:3718 notifier_call_chain+0xb7/0x410 kernel/notifier.c:85 page last free pid 6506 tgid 6506 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0x1080 mm/page_alloc.c:2657 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4119 [inline] slab_alloc_node mm/slub.c:4168 [inline] kmem_cache_alloc_node_noprof+0x223/0x3c0 mm/slub.c:4220 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1323 [inline] netlink_alloc_large_skb+0x69/0x130 net/netlink/af_netlink.c:1196 netlink_sendmsg+0x689/0xd70 net/netlink/af_netlink.c:1866 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2583 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637 __sys_sendmsg+0x16e/0x220 net/socket.c:2669 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88802582d800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802582d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802582d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802582d980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802582da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================