syzbot has found a reproducer for the following issue on: HEAD commit: 635c467cc14e Add linux-next specific files for 20260213 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=14d8ec02580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f09eec269f9f4746 dashboard link: https://syzkaller.appspot.com/bug?extid=774863666ef5b025c9d0 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12cc2ffa580000
Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/24870d51cbd0/disk-635c467c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/49283c738806/vmlinux-635c467c.xz kernel image: https://storage.googleapis.com/syzbot-assets/8c5f9d1da977/bzImage-635c467c.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b01c09978893/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=163e915a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] INFO: task syz.3.20:6102 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.20 state:D stack:28368 pid:6102 tgid:6087 ppid:5957 task_flags:0x400040 flags:0x00080002 Call Trace: <TASK> context_switch kernel/sched/core.c:5295 [inline] __schedule+0x1585/0x5340 kernel/sched/core.c:6907 __schedule_loop kernel/sched/core.c:6989 [inline] schedule+0x164/0x360 kernel/sched/core.c:7004 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7061 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776 blk_trace_startstop+0x8f/0x610 kernel/trace/blktrace.c:901 blk_trace_ioctl+0x315/0x740 kernel/trace/blktrace.c:947 blkdev_common_ioctl+0x13a7/0x3250 block/ioctl.c:724 blkdev_ioctl+0x528/0x740 block/ioctl.c:798 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f530c39bf79 RSP: 002b:00007f530d2e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f530c616180 RCX: 00007f530c39bf79 RDX: 0000000000000000 RSI: 0000000000001275 RDI: 0000000000000007 RBP: 00007f530c4327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f530c616218 R14: 00007f530c616180 R15: 00007ffdd027c568 </TASK> INFO: task syz.2.19:6109 blocked for more than 150 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:26720 pid:6109 tgid:6091 ppid:5955 task_flags:0x400140 flags:0x00080002 Call Trace: <TASK> context_switch kernel/sched/core.c:5295 [inline] __schedule+0x1585/0x5340 kernel/sched/core.c:6907 __schedule_loop kernel/sched/core.c:6989 [inline] schedule+0x164/0x360 kernel/sched/core.c:7004 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7061 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776 relay_open+0x3b8/0x920 kernel/relay.c:516 blk_trace_setup_prepare+0x425/0x5a0 kernel/trace/blktrace.c:716 blk_trace_setup+0x2c0/0x430 kernel/trace/blktrace.c:789 blk_trace_ioctl+0x380/0x740 kernel/trace/blktrace.c:935 --- 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.
