================================================================== BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 Read of size 1 at addr ffff8881165a3fff by task syz.0.3789/20022 CPU: 1 UID: 0 PID: 20022 Comm: syz.0.3789 Not tainted 6.13.0-rc4-syzkaller-00076-gf097a36ef88d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 __hid_input_report.constprop.0+0x312/0x440 drivers/hid/hid-core.c:2111 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650 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+0x206/0x8d0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7fc25d66592b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007fc25bcd5f70 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 00007fc25d66592b RDX: 00007fc25bcd5ff0 RSI: 0000000040085507 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fc25d980320 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000020000040 R13: 0000000000000000 R14: 00007fc25d855fa0 R15: 00007ffca44a6f18 Allocated by task 19838: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:345 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+0x150/0x3b0 mm/slub.c:4220 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:587 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xca3/0x1870 lib/kobject_uevent.c:608 __kobject_del+0x168/0x1f0 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x327/0x5a0 lib/kobject.c:737 bus_remove_driver+0x16e/0x2c0 drivers/base/bus.c:746 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 usb_gadget_register_driver_owner+0x20f/0x330 drivers/usb/gadget/udc/core.c:1722 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline] raw_ioctl+0x1731/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1306 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 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 2844: 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+0x37/0x50 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] kmem_cache_free+0x133/0x470 mm/slub.c:4715 skb_kfree_head net/core/skbuff.c:1084 [inline] skb_kfree_head net/core/skbuff.c:1081 [inline] skb_free_head+0x18a/0x1d0 net/core/skbuff.c:1098 skb_release_data+0x760/0x910 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb net/core/skbuff.c:1436 [inline] consume_skb+0xbf/0x100 net/core/skbuff.c:1430 netlink_recvmsg+0x53f/0xe20 net/netlink/af_netlink.c:1969 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg+0x1f6/0x250 net/socket.c:1055 ____sys_recvmsg+0x219/0x6b0 net/socket.c:2803 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 __sys_recvmsg+0x16b/0x220 net/socket.c:2878 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 The buggy address belongs to the object at ffff8881165a3c00 which belongs to the cache skbuff_small_head of size 640 The buggy address is located 383 bytes to the right of allocated 640-byte region [ffff8881165a3c00, ffff8881165a3e80) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881165a2100 pfn:0x1165a0 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x200000000000240(workingset|head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000240 ffff888102a95280 ffffea000428ff10 ffffea000445bb10 raw: ffff8881165a2100 0000000000150007 00000001f5000000 0000000000000000 head: 0200000000000240 ffff888102a95280 ffffea000428ff10 ffffea000445bb10 head: ffff8881165a2100 0000000000150007 00000001f5000000 0000000000000000 head: 0200000000000002 ffffea0004596801 ffffffffffffffff 0000000000000000 head: ffff888100000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 19065, tgid 19057 (syz.4.3484), ts 1755193849235, free_ts 1737060161125 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3476 __alloc_pages_noprof+0x21c/0x22a0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0xeb/0x400 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+0xd1d/0x16e0 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] kmem_cache_alloc_node_noprof+0x1f7/0x3b0 mm/slub.c:4220 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:587 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xca3/0x1870 lib/kobject_uevent.c:608 __kobject_del+0x168/0x1f0 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x327/0x5a0 lib/kobject.c:737 bus_remove_driver+0x16e/0x2c0 drivers/base/bus.c:746 driver_unregister+0x76/0xb0 drivers/base/driver.c:274 page last free pid 14060 tgid 14060 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0xe40 mm/page_alloc.c:2659 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+0x4e/0x70 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] __kmalloc_cache_noprof+0x153/0x3e0 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] m920x_rc_core_query+0x4d/0x500 drivers/media/usb/dvb-usb/m920x.c:222 dvb_usb_read_remote_control+0xda/0x1c0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 Memory state around the buggy address: ffff8881165a3e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881165a3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881165a3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881165a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881165a4080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================