================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: slab-out-of-bounds in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:577 [inline] BUG: KASAN: slab-out-of-bounds in try_module_get+0x4f/0xf0 kernel/module.c:1076 Write of size 4 at addr ffff888025247d90 by task syz.1.93/4710 CPU: 0 PID: 4710 Comm: syz.1.93 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x235/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:577 [inline] try_module_get+0x4f/0xf0 kernel/module.c:1076 dvb_device_open+0xf1/0x370 drivers/media/dvb-core/dvbdev.c:113 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414 do_dentry_open+0x7ff/0xf80 fs/open.c:826 do_open fs/namei.c:3616 [inline] path_openat+0x26f5/0x2fa0 fs/namei.c:3750 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7ff82f55168e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007ff82d384b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ff82d3856c0 RCX: 00007ff82f55168e RDX: 0000000000040002 RSI: 00007ff82d384c00 RDI: ffffffffffffff9c RBP: 00007ff82d384c00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007ff82f80a308 R14: 00007ff82f80a270 R15: 00007ffc5f92c0d8 Allocated by task 1: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:607 [inline] __usb_create_hcd+0x663/0x840 drivers/usb/core/hcd.c:2601 vhci_hcd_probe+0xff/0x370 drivers/usb/usbip/vhci_hcd.c:1376 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x284/0xc80 drivers/base/dd.c:595 __driver_probe_device+0x1ef/0x390 drivers/base/dd.c:775 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429 __device_attach+0x2a8/0x480 drivers/base/dd.c:999 bus_probe_device+0xbc/0x1e0 drivers/base/bus.c:489 device_add+0xa3a/0x1000 drivers/base/core.c:3427 platform_device_add+0x4b9/0x820 drivers/base/platform.c:712 vhci_hcd_init+0x3c7/0x500 drivers/usb/usbip/vhci_hcd.c:1571 do_one_initcall+0x272/0x730 init/main.c:1316 do_initcall_level+0x137/0x1f0 init/main.c:1389 do_initcalls+0x4b/0x90 init/main.c:1405 kernel_init_freeable+0x3e9/0x570 init/main.c:1629 kernel_init+0x19/0x1b0 init/main.c:1520 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff888025247d00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 144 bytes inside of 192-byte region [ffff888025247d00, ffff888025247dc0) The buggy address belongs to the page: page:ffffea00009491c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25247 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888016c41a00 raw: 0000000000000000 0000000000100010 00000001ffffffff 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 0x12c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY), pid 7, ts 8284863871, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] __kmalloc+0x1cd/0x330 mm/slub.c:4408 kmalloc include/linux/slab.h:612 [inline] usb_alloc_urb+0x3f/0x140 drivers/usb/core/urb.c:74 usb_internal_control_msg drivers/usb/core/message.c:109 [inline] usb_control_msg+0x115/0x3e0 drivers/usb/core/message.c:166 get_port_status drivers/usb/core/hub.c:596 [inline] hub_ext_port_status+0x103/0x6d0 drivers/usb/core/hub.c:613 hub_port_status drivers/usb/core/hub.c:635 [inline] hub_activate+0x6e9/0x1a30 drivers/usb/core/hub.c:1146 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 page_owner free stack trace missing Memory state around the buggy address: ffff888025247c80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888025247d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888025247d80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888025247e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888025247e80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc 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