Hello, syzbot found the following issue on: HEAD commit: f1a27f081c1f usb: typec: qcom-pmic-typec: allow different .. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=159f19fde80000 kernel config: https://syzkaller.appspot.com/x/.config?x=70204d1d16341bf4 dashboard link: https://syzkaller.appspot.com/bug?extid=ce750e124675d4599449 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5c37a861daee/disk-f1a27f08.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/09f1af46fd09/vmlinux-f1a27f08.xz kernel image: https://storage.googleapis.com/syzbot-assets/82eb085e0be1/bzImage-f1a27f08.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ce750e124675d4599449@xxxxxxxxxxxxxxxxxxxxxxxxx pvrusb2: Device being rendered inoperable ================================================================== BUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 Read of size 4 at addr ffff888111b8fed8 by task kworker/0:6/8544 CPU: 0 PID: 8544 Comm: kworker/0:6 Not tainted 6.8.0-rc1-syzkaller-00046-gf1a27f081c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 pvr2_context_notify drivers/media/usb/pvrusb2/pvrusb2-context.c:95 [inline] pvr2_context_disconnect+0x94/0xb0 drivers/media/usb/pvrusb2/pvrusb2-context.c:272 pvr_disconnect+0x80/0xf0 drivers/media/usb/pvrusb2/pvrusb2-main.c:79 usb_unbind_interface+0x1e5/0x960 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x39a/0xa50 drivers/base/core.c:3814 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416 usb_disconnect+0x2e1/0x910 drivers/usb/core/hub.c:2286 hub_port_connect drivers/usb/core/hub.c:5334 [inline] hub_port_connect_change drivers/usb/core/hub.c:5634 [inline] port_event drivers/usb/core/hub.c:5794 [inline] hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5876 process_one_work+0x884/0x15c0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 </TASK> Allocated by task 8544: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0x87/0x90 mm/kasan/common.c:389 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] pvr2_context_create+0x53/0x2a0 drivers/media/usb/pvrusb2/pvrusb2-context.c:207 pvr_probe+0x25/0xe0 drivers/media/usb/pvrusb2/pvrusb2-main.c:54 usb_probe_interface+0x307/0x9c0 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x117e/0x1aa0 drivers/base/core.c:3625 usb_set_configuration+0x10cb/0x1c40 drivers/usb/core/message.c:2207 usb_generic_driver_probe+0xad/0x110 drivers/usb/core/generic.c:254 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:294 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x117e/0x1aa0 drivers/base/core.c:3625 usb_new_device+0xd80/0x19f0 drivers/usb/core/hub.c:2625 hub_port_connect drivers/usb/core/hub.c:5494 [inline] hub_port_connect_change drivers/usb/core/hub.c:5634 [inline] port_event drivers/usb/core/hub.c:5794 [inline] hub_event+0x2e62/0x4f40 drivers/usb/core/hub.c:5876 process_one_work+0x884/0x15c0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Freed by task 897: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x106/0x1b0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x105/0x330 mm/slub.c:4409 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline] pvr2_context_thread_func+0x69d/0x960 drivers/media/usb/pvrusb2/pvrusb2-context.c:158 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 The buggy address belongs to the object at ffff888111b8fe00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 216 bytes inside of freed 256-byte region [ffff888111b8fe00, ffff888111b8ff00) The buggy address belongs to the physical page: page:ffffea000446e380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111b8e head:ffffea000446e380 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x200000000000840(slab|head|node=0|zone=2) page_type: 0xffffffff() raw: 0200000000000840 ffff888100041b40 ffffea0004698e80 dead000000000003 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6208, tgid 6208 (dhcpcd-run-hook), ts 253184444708, free_ts 252376724208 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0x139a/0x3460 mm/page_alloc.c:3311 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab+0xa3/0x360 mm/slub.c:2354 new_slab mm/slub.c:2407 [inline] ___slab_alloc+0x4d2/0x1950 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc_node+0x177/0x4b0 mm/slub.c:3988 kmalloc_array_node include/linux/slab.h:688 [inline] kcalloc_node include/linux/slab.h:693 [inline] memcg_alloc_slab_cgroups+0xa9/0x170 mm/memcontrol.c:2988 account_slab mm/slub.c:2317 [inline] allocate_slab+0x2b5/0x360 mm/slub.c:2372 new_slab mm/slub.c:2407 [inline] ___slab_alloc+0x4d2/0x1950 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmem_cache_alloc+0x326/0x370 mm/slub.c:3867 anon_vma_chain_alloc mm/rmap.c:142 [inline] anon_vma_fork+0x1fc/0x610 mm/rmap.c:365 dup_mmap kernel/fork.c:712 [inline] dup_mm kernel/fork.c:1685 [inline] copy_mm kernel/fork.c:1734 [inline] copy_process+0x9306/0x9920 kernel/fork.c:2496 kernel_clone+0xfc/0x850 kernel/fork.c:2901 __do_sys_clone+0xba/0x100 kernel/fork.c:3044 page last free pid 4799 tgid 4799 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x503/0xae0 mm/page_alloc.c:2346 free_unref_page+0x33/0x2c0 mm/page_alloc.c:2486 __put_partials+0x149/0x160 mm/slub.c:2922 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x4a/0x70 mm/kasan/common.c:324 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmalloc_trace+0x13a/0x390 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] usb_control_msg+0xbd/0x4a0 drivers/usb/core/message.c:144 get_bMaxPacketSize0+0xc3/0x280 drivers/usb/core/hub.c:4779 hub_port_init+0x6a8/0x3a50 drivers/usb/core/hub.c:4975 hub_port_connect drivers/usb/core/hub.c:5423 [inline] hub_port_connect_change drivers/usb/core/hub.c:5634 [inline] port_event drivers/usb/core/hub.c:5794 [inline] hub_event+0x2c20/0x4f40 drivers/usb/core/hub.c:5876 process_one_work+0x884/0x15c0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff888111b8fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888111b8fe00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888111b8fe80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888111b8ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888111b8ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
