vhci_hcd vhci_hcd.0: pdev(2) rhport(1) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) ------------[ cut here ]------------ kernel BUG at drivers/usb/usbip/vhci_sysfs.c:395! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 13222 Comm: syz-executor.2 Not tainted 5.11.0-rc6-next-20210205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:attach_store.cold+0x2cc/0x396 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/drivers/usb/usbip/vhci_sysfs.c:395 Code: e8 f1 0d d0 f8 4c 8b 65 70 48 c7 c7 00 f0 ff ff 4c 89 e6 e8 5e 51 8c f8 49 81 fc 00 f0 ff ff 0f 86 b1 00 00 00 e8 5c 49 8c f8 <0f> 0b 89 14 24 e8 22 0e d0 f8 8b 14 24 e9 c1 fd ff ff 89 0c 24 e8 RSP: 0018:ffffc90003a8fb58 EFLAGS: 00010212 RAX: 000000000000ef52 RBX: fffffffffffffffc RCX: ffffc9000d3b1000 RDX: 0000000000040000 RSI: ffffffff88e6a384 RDI: 0000000000000003 RBP: ffff88801c7685d0 R08: fffffffffffff000 R09: ffff88803082b8a7 R10: ffffffff88e6a41c R11: 0000000000000000 R12: fffffffffffffffc R13: ffff88801c768640 R14: ffff88801c7685e8 R15: ffff888067d9aa00 FS: 00007f3eb6c8f700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f68000 CR3: 0000000018b02000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dev_attr_store+0x50/0x80 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/drivers/base/core.c:1936 sysfs_kf_write+0x110/0x160 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/sysfs/file.c:139 kernfs_fop_write_iter+0x342/0x500 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/kernfs/file.c:296 call_write_iter syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/./include/linux/fs.h:1977 [inline] new_sync_write+0x426/0x650 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/read_write.c:519 vfs_write+0x791/0xa30 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/read_write.c:606 ksys_write+0x12d/0x250 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/read_write.c:659 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x418cef Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48 RSP: 002b:00007f3eb6c8eb90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000418cef RDX: 0000000000000008 RSI: 00007f3eb6c8ebe0 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000000000000 R09: 00007f3eb6c8eb30 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000004bf850 R13: 00007f3eb6c8ebe0 R14: 0000000000000000 R15: 0000000000022000 Modules linked in: ---[ end trace 66ada7fa37e3e8e8 ]--- RIP: 0010:attach_store.cold+0x2cc/0x396 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/drivers/usb/usbip/vhci_sysfs.c:395 Code: e8 f1 0d d0 f8 4c 8b 65 70 48 c7 c7 00 f0 ff ff 4c 89 e6 e8 5e 51 8c f8 49 81 fc 00 f0 ff ff 0f 86 b1 00 00 00 e8 5c 49 8c f8 <0f> 0b 89 14 24 e8 22 0e d0 f8 8b 14 24 e9 c1 fd ff ff 89 0c 24 e8 RSP: 0018:ffffc90003a8fb58 EFLAGS: 00010212 RAX: 000000000000ef52 RBX: fffffffffffffffc RCX: ffffc9000d3b1000 RDX: 0000000000040000 RSI: ffffffff88e6a384 RDI: 0000000000000003 RBP: ffff88801c7685d0 R08: fffffffffffff000 R09: ffff88803082b8a7 R10: ffffffff88e6a41c R11: 0000000000000000 R12: fffffffffffffffc R13: ffff88801c768640 R14: ffff88801c7685e8 R15: ffff888067d9aa00 FS: 00007f3eb6c8f700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc21000 CR3: 0000000018b02000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400