Hello, syzbot found the following issue on: HEAD commit: 7b1d1d4cfac0 Merge remote-tracking branch 'iommu/arm/smmu'.. 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=127619c0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=dfe1e340fbee3d16 dashboard link: https://syzkaller.appspot.com/bug?extid=15f68436afaf0cc3af11 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=12368530580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/354fe38e2935/disk-7b1d1d4c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f12e0b1ef3fd/vmlinux-7b1d1d4c.xz kernel image: https://storage.googleapis.com/syzbot-assets/291dbc519bb3/Image-7b1d1d4c.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/c8d5f19b6cc3/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+15f68436afaf0cc3af11@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6595 at include/linux/sched/signal.h:548 restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] WARNING: CPU: 0 PID: 6595 at include/linux/sched/signal.h:548 poll_select_finish+0x71c/0x7e0 fs/select.c:301 Modules linked in: CPU: 0 UID: 0 PID: 6595 Comm: syz.0.15 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] pc : poll_select_finish+0x71c/0x7e0 fs/select.c:301 lr : restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] lr : poll_select_finish+0x71c/0x7e0 fs/select.c:301 sp : ffff8000a02e7b20 x29: ffff8000a02e7c20 x28: dfff800000000000 x27: 0000000000000000 x26: ffff70001405cf6c x25: 0000000000000002 x24: ffff8000a02e7ce0 x23: 0000000000000008 x22: ffff8000a02e7ba0 x21: ffff0000d55cbc80 x20: 0000000000000008 x19: 00000000fffffdfe x18: 1fffe000366c6876 x17: ffff80008f81d000 x16: ffff80008b3edfc8 x15: 0000000000000002 x14: 1ffff0001405cf74 x13: 0000000000000000 x12: 0000000000000000 x11: ffff70001405cf76 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d55cbc80 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] (P) poll_select_finish+0x71c/0x7e0 fs/select.c:301 (P) restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] (L) poll_select_finish+0x71c/0x7e0 fs/select.c:301 (L) __do_sys_ppoll fs/select.c:1122 [inline] __se_sys_ppoll fs/select.c:1101 [inline] __arm64_sys_ppoll+0x2d8/0x358 fs/select.c:1101 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 796 hardirqs last enabled at (795): [<ffff80008b4b56a4>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (795): [<ffff80008b4b56a4>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (796): [<ffff80008b4b302c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (752): [<ffff80008002f3d8>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (750): [<ffff80008002f3a4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- --- 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. 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
