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em28xx 2-1:0.0: Closing input extension ================================================================== BUG: KASAN: use-after-free in media_device_unregister+0x132/0x3f0 Read of size 8 at addr ffff888024674210 by task kworker/1:6/3676 CPU: 1 PID: 3676 Comm: kworker/1:6 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 media_device_unregister+0x132/0x3f0 em28xx_unregister_media_device drivers/media/usb/em28xx/em28xx-cards.c:3464 [inline] em28xx_release_resources+0xa6/0x230 drivers/media/usb/em28xx/em28xx-cards.c:3485 em28xx_usb_disconnect+0x1c4/0x520 drivers/media/usb/em28xx/em28xx-cards.c:4154 usb_unbind_interface+0x1cd/0x840 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1229 [inline] device_release_driver_internal+0x50e/0x7f0 drivers/base/dd.c:1262 bus_remove_device+0x2e5/0x400 drivers/base/bus.c:529 device_del+0x6e2/0xbd0 drivers/base/core.c:3603 usb_disable_device+0x3b8/0x840 drivers/usb/core/message.c:1414 usb_disconnect+0x33c/0x8c0 drivers/usb/core/hub.c:2248 hub_port_connect drivers/usb/core/hub.c:5299 [inline] hub_port_connect_change drivers/usb/core/hub.c:5595 [inline] port_event drivers/usb/core/hub.c:5741 [inline] hub_event+0x1d58/0x54c0 drivers/usb/core/hub.c:5823 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 process_scheduled_works kernel/workqueue.c:2373 [inline] worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 </TASK> The buggy address belongs to the page: page:ffffea0000919d00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24674 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001d6e008 ffff8880b91409b0 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 2, migratetype Unmovable, gfp_mask 0x140dc0(GFP_USER|__GFP_COMP|__GFP_ZERO), pid 3564, ts 66757927960, free_ts 67298392923 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5423 kmalloc_order+0x41/0x150 mm/slab_common.c:966 kmalloc_order_trace+0x15/0xe0 mm/slab_common.c:982 kmalloc_large include/linux/slab.h:520 [inline] kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:721 [inline] em28xx_v4l2_init+0xe2/0x2d50 drivers/media/usb/em28xx/em28xx-video.c:2542 em28xx_init_extension+0x11b/0x1c0 drivers/media/usb/em28xx/em28xx-core.c:1126 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_nonslab_page+0xe4/0x150 mm/slub.c:3535 kfree+0x1cf/0x270 mm/slub.c:4556 em28xx_free_v4l2 drivers/media/usb/em28xx/em28xx-video.c:2128 [inline] kref_put include/linux/kref.h:65 [inline] em28xx_v4l2_init+0x15d7/0x2d50 drivers/media/usb/em28xx/em28xx-video.c:2911 em28xx_init_extension+0x11b/0x1c0 drivers/media/usb/em28xx/em28xx-core.c:1126 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff888024674100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888024674180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888024674200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888024674280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888024674300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/10/02 04:17 | linux-5.15.y | 3a5928702e71 | ea2b66a6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in em28xx_release_resources |