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Date: Sat, 08 Jun 2024 17:28:26 -0700 From: syzbot <syzbot+5f996b83575ef4058638@...kaller.appspotmail.com> To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [usb?] INFO: rcu detected stall in raw_ioctl syzbot has found a reproducer for the following issue on: HEAD commit: 8867bbd4a056 mm: arm64: Fix the out-of-bounds issue in con.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=10961932980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3b4350cf56c61c80 dashboard link: https://syzkaller.appspot.com/bug?extid=5f996b83575ef4058638 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15be6dce980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=101ca30a980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6ea21f50498b/disk-8867bbd4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e2fed09364aa/vmlinux-8867bbd4.xz kernel image: https://storage.googleapis.com/syzbot-assets/4860173c7a18/Image-8867bbd4.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5f996b83575ef4058638@...kaller.appspotmail.com cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor782:6625] CPU#0 Utilization every 4s during lockup: #1: 98% system, 0% softirq, 3% hardirq, 0% idle #2: 98% system, 0% softirq, 3% hardirq, 0% idle #3: 98% system, 0% softirq, 3% hardirq, 0% idle #4: 98% system, 0% softirq, 3% hardirq, 0% idle #5: 98% system, 1% softirq, 3% hardirq, 0% idle Modules linked in: irq event stamp: 73096 hardirqs last enabled at (73095): [<ffff80008037bc00>] console_emit_next_record kernel/printk/printk.c:2935 [inline] hardirqs last enabled at (73095): [<ffff80008037bc00>] console_flush_all+0x650/0xb74 kernel/printk/printk.c:2994 hardirqs last disabled at (73096): [<ffff80008af10b00>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (73096): [<ffff80008af10b00>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (73048): [<ffff8000801ea530>] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (73048): [<ffff8000801ea530>] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582 softirqs last disabled at (73043): [<ffff800080020de8>] __do_softirq+0x14/0x20 kernel/softirq.c:588 CPU: 0 PID: 6625 Comm: syz-executor782 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:176 [inline] pc : arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] pc : console_emit_next_record kernel/printk/printk.c:2935 [inline] pc : console_flush_all+0x67c/0xb74 kernel/printk/printk.c:2994 lr : console_emit_next_record kernel/printk/printk.c:2935 [inline] lr : console_flush_all+0x678/0xb74 kernel/printk/printk.c:2994 sp : ffff800097d67380 x29: ffff800097d67480 x28: ffff800097d67530 x27: 0000000000000001 x26: ffff80009090b530 x25: ffff80009090b520 x24: dfff800000000000 x23: 1ffff000121216af x22: dfff800000000000 x21: ffff80009090b578 x20: 0000000000000000 x19: 00000000000000c0 x18: ffff800097d672b8 x17: 6965636572207375 x16: ffff80008033878c x15: 0000000000000001 x14: 1ffff00011e379c8 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cdc05ac0 x7 : ffff800080381d44 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000000000080 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] console_emit_next_record kernel/printk/printk.c:2935 [inline] console_flush_all+0x67c/0xb74 kernel/printk/printk.c:2994 console_unlock+0xec/0x3d4 kernel/printk/printk.c:3063 vprintk_emit+0x1ec/0x350 kernel/printk/printk.c:2345 vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2360 vprintk+0x200/0x2d4 kernel/printk/printk_safe.c:45 _printk+0xdc/0x128 kernel/printk/printk.c:2370 usb_gadget_register_driver_owner+0x1f0/0x224 drivers/usb/gadget/udc/core.c:1711 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline] raw_ioctl+0x10c0/0x33bc drivers/usb/gadget/legacy/raw_gadget.c:1306 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
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