Hello, syzbot found the following issue on: HEAD commit: 3db4c21c usb: typec: tcpm: Update vbus_vsafe0v on init 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=179809f3500000 kernel config: https://syzkaller.appspot.com/x/.config?x=d24ee9ecd7ce968e dashboard link: https://syzkaller.appspot.com/bug?extid=7b774a105bad5f282322 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7b774a105bad5f282322@xxxxxxxxxxxxxxxxxxxxxxxxx usb 1-1: Direct firmware load for rtlwifi/rtl8192cufw.bin failed with error -2 ================================================================== BUG: KASAN: slab-out-of-bounds in rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87 Read of size 8 at addr ffff888142b2ff58 by task kworker/0:6/7385 CPU: 0 PID: 7385 Comm: kworker/0:6 Not tainted 5.10.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x4c8 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87 request_firmware_work_func+0x12c/0x230 drivers/base/firmware_loader/main.c:1079 process_one_work+0x933/0x1520 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x38c/0x460 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Allocated by task 16159: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 kmalloc include/linux/slab.h:557 [inline] tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723 security_file_ioctl+0x50/0xb0 security/security.c:1481 __do_sys_ioctl fs/ioctl.c:747 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 16159: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x102/0x140 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kfree+0xe5/0x5e0 mm/slub.c:4124 tomoyo_realpath_from_path+0x191/0x620 security/tomoyo/realpath.c:291 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723 security_file_ioctl+0x50/0xb0 security/security.c:1481 __do_sys_ioctl fs/ioctl.c:747 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888142b2e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3928 bytes to the right of 4096-byte region [ffff888142b2e000, ffff888142b2f000) The buggy address belongs to the page: page:00000000104f6cd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x142b28 head:00000000104f6cd2 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff888100042140 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888142b2fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888142b2fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888142b2ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888142b2ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888142b30000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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.
