On Wed, Jun 5, 2024 at 11:23 AM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > For some reason this thread doesn't appear in my linux-mm archive. > Lance, please take a look? Hi Andrew, thanks for pointing this out! Hi Hillf, thanks a lot for helping to test the patch[1] with syzbot! I noticed that syzbot has confirmed the patch and that the reproducer did not trigger any issues[2]. Hopefully, the patch[3] will land in -rc3 to make the testing bots happy. [1] https://lore.kernel.org/all/20240604123656.1730-1-hdanton@xxxxxxxx/ [2] https://lore.kernel.org/all/000000000000a3bf64061a101538@xxxxxxxxxx/ [3] https://lore.kernel.org/linux-mm/20240524005444.135417-1-21cnbao@xxxxxxxxx/ Thanks, Lance > > > On Mon, 03 Jun 2024 06:05:33 -0700 syzbot <syzbot+5a1cb2c00e895afca87e@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 4a4be1ad3a6e Revert "vfs: Delete the associated dentry whe.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=104284f2980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=bd6024aedb15e15c > > dashboard link: https://syzkaller.appspot.com/bug?extid=5a1cb2c00e895afca87e > > compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > userspace arch: arm64 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124e1664980000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15683162980000 > > > > Downloadable assets: > > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-4a4be1ad.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/75957361122b/vmlinux-4a4be1ad.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/6c766b0ec377/Image-4a4be1ad.gz.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+5a1cb2c00e895afca87e@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > Kernel panic - not syncing: corrupted stack end detected inside scheduler > > CPU: 1 PID: 3188 Comm: syz-executor396 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 > > Hardware name: linux,dummy-virt (DT) > > Call trace: > > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > > __dump_stack lib/dump_stack.c:88 [inline] > > dump_stack_lvl+0x38/0x90 lib/dump_stack.c:114 > > dump_stack+0x18/0x24 lib/dump_stack.c:123 > > panic+0x39c/0x3d0 kernel/panic.c:347 > > schedule_debug kernel/sched/core.c:5962 [inline] > > schedule+0x0/0x104 kernel/sched/core.c:6628 > > preempt_schedule_irq+0x3c/0x80 kernel/sched/core.c:7067 > > arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:301 [inline] > > __el1_irq arch/arm64/kernel/entry-common.c:539 [inline] > > el1_interrupt+0x4c/0x64 arch/arm64/kernel/entry-common.c:551 > > el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 > > el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 > > __rcu_read_lock+0x0/0x14 kernel/rcu/tree_stall.h:125 > > pte_offset_map_nolock+0x38/0xb0 mm/pgtable-generic.c:314 > > move_pages_pte mm/userfaultfd.c:1160 [inline] > > move_pages+0x330/0x13a4 mm/userfaultfd.c:1733 > > userfaultfd_move fs/userfaultfd.c:2016 [inline] > > userfaultfd_ioctl+0x6f4/0x1ed8 fs/userfaultfd.c:2134 > > 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+0xac/0xf0 fs/ioctl.c:893 > > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:133 > > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:152 > > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > > SMP: stopping secondary CPUs > > Kernel Offset: disabled > > CPU features: 0x00,00000006,8f17bd7c,1767f6bf > > Memory Limit: none > > Rebooting in 86400 seconds.. > > > > > > --- > > 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
