| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <68af0313.a70a0220.3cafd4.0020.GAE@google.com> Date: Wed, 27 Aug 2025 06:07:31 -0700 From: syzbot <syzbot+4507914ec56d21bb39ed@...kaller.appspotmail.com> To: brauner@...nel.org, clm@...com, dsterba@...e.com, jack@...e.cz, josef@...icpanda.com, linux-block@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk Subject: [syzbot] [block?] [ext4?] [btrfs?] INFO: rcu detected stall in sys_mount (8) Hello, syzbot found the following issue on: HEAD commit: 8f5ae30d69d7 Linux 6.17-rc1 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=16a85ef0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb dashboard link: https://syzkaller.appspot.com/bug?extid=4507914ec56d21bb39ed compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1455a462580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12229462580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/18a2e4bd0c4a/disk-8f5ae30d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3b5395881b25/vmlinux-8f5ae30d.xz kernel image: https://storage.googleapis.com/syzbot-assets/e875f4e3b7ff/Image-8f5ae30d.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/47be3ab62135/mount_6.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4507914ec56d21bb39ed@...kaller.appspotmail.com watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz.0.563:8489] Modules linked in: irq event stamp: 251614 hardirqs last enabled at (251613): [<ffff80008b028df8>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (251613): [<ffff80008b028df8>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (251614): [<ffff80008b001cbc>] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (251614): [<ffff80008b001cbc>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (251590): [<ffff8000803d88a0>] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (251590): [<ffff8000803d88a0>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (251581): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613 CPU: 1 UID: 0 PID: 8489 Comm: syz.0.563 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : skip_mnt_tree fs/namespace.c:-1 [inline] pc : commit_tree fs/namespace.c:1201 [inline] pc : attach_recursive_mnt+0x1414/0x19f0 fs/namespace.c:2716 lr : skip_mnt_tree fs/namespace.c:1184 [inline] lr : commit_tree fs/namespace.c:1201 [inline] lr : attach_recursive_mnt+0x1430/0x19f0 fs/namespace.c:2716 sp : ffff8000a0de7960 x29: ffff8000a0de7a60 x28: ffff0000df3956c0 x27: dfff800000000000 x26: ffff0000d65d31c0 x25: ffff0000d65d3180 x24: ffff0000d931d600 x23: ffff0000df3956c0 x22: ffff0000df395500 x21: ffff0000d65d2e41 x20: ffff0000f39e5ab0 x19: ffff0000f39e5ab0 x18: 1fffe000337a0688 x17: ffff0001fea8c8b0 x16: ffff80008afd3190 x15: 0000000000000002 x14: 1fffe0001be72ae1 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001be72ae3 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : 0000000000000000 x2 : 0000000000000008 x1 : ffff0000d65d31c0 x0 : ffff0000f39e5aa8 Call trace: skip_mnt_tree fs/namespace.c:-1 [inline] (P) commit_tree fs/namespace.c:1201 [inline] (P) attach_recursive_mnt+0x1414/0x19f0 fs/namespace.c:2716 (P) graft_tree+0x134/0x184 fs/namespace.c:2862 do_loopback+0x334/0x3e8 fs/namespace.c:3037 path_mount+0x4cc/0xde0 fs/namespace.c:4114 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount fs/namespace.c:4321 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6164 Comm: udevd Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 lr : path_init+0xdc0/0xe98 fs/namei.c:2537 sp : ffff8000a43e7740 x29: ffff8000a43e77a0 x28: dfff800000000000 x27: 1fffe00018f95664 x26: ffff0000c7cab320 x25: 0000000000000101 x24: 1ffff0001487cf5b x23: ffff80008f745840 x22: ffff8000a43e7adc x21: 0000000000000100 x20: ffff8000a43e7aa0 x19: 0000000000032fab x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008b007230 x15: 0000000000000001 x14: 1ffff00011ee8b08 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700011ee8b09 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d8babd00 x7 : ffff800080daa4c4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080da8a84 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 (P) path_openat+0x13c/0x2c40 fs/namei.c:4041 do_filp_open+0x18c/0x36c fs/namei.c:4073 do_sys_openat2+0x11c/0x1b4 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1461 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 --- 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@...glegroups.com. 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 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. 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
Powered by blists - more mailing lists