On Wed, Mar 13, 2024 at 12:23 PM syzbot <syzbot+3abd99031b42acf367ef@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 707081b61156 Merge branch 'for-next/core', remote-tracking.. > 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=1785a859180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=caeac3f3565b057a > dashboard link: https://syzkaller.appspot.com/bug?extid=3abd99031b42acf367ef > 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=1115ada6180000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1626870a180000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/6cad68bf7532/disk-707081b6.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/1a27e5400778/vmlinux-707081b6.xz > kernel image: https://storage.googleapis.com/syzbot-assets/67dfc53755d0/Image-707081b6.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+3abd99031b42acf367ef@xxxxxxxxxxxxxxxxxxxxxxxxx > #syz test: https://github.com/amir73il/linux ovl-fixes Thanks, Amir. > evm: overlay not supported > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 6187 at fs/overlayfs/copy_up.c:239 ovl_copy_up_file+0x624/0x674 fs/overlayfs/copy_up.c:330 > Modules linked in: > CPU: 0 PID: 6187 Comm: syz-executor136 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : ovl_copy_up_file+0x624/0x674 fs/overlayfs/copy_up.c:330 > lr : ovl_verify_area fs/overlayfs/copy_up.c:239 [inline] > lr : ovl_copy_up_file+0x620/0x674 fs/overlayfs/copy_up.c:330 > sp : ffff800097997180 > x29: ffff800097997280 x28: 00000000fffffffb x27: ffff700012f32e3c > x26: 0000000000800000 x25: 0000000000800000 x24: ffff800097997240 > x23: ffff800097997220 x22: ffffffffffa64000 x21: ffffffffffa64000 > x20: ffff0000d9fc1900 x19: dfff800000000000 x18: 1ffff00012f32dee > x17: ffff80008ec9d000 x16: ffff80008ad6b1c0 x15: 0000000000000001 > x14: 1fffe0001b9177f2 x13: 0000000000000000 x12: 0000000000000000 > x11: 0000000000000001 x10: 0000000000ff0100 x9 : 0000000000000000 > x8 : ffff0000d7568000 x7 : ffff80008108d924 x6 : 0000000000000000 > x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008031a200 > x2 : 00000ffffffff000 x1 : ffffffffffa64000 x0 : ffffffffffffffff > Call trace: > ovl_copy_up_file+0x624/0x674 fs/overlayfs/copy_up.c:330 > ovl_copy_up_tmpfile fs/overlayfs/copy_up.c:863 [inline] > ovl_do_copy_up fs/overlayfs/copy_up.c:976 [inline] > ovl_copy_up_one fs/overlayfs/copy_up.c:1168 [inline] > ovl_copy_up_flags+0x16d0/0x3694 fs/overlayfs/copy_up.c:1223 > ovl_copy_up+0x24/0x34 fs/overlayfs/copy_up.c:1263 > ovl_setattr+0xfc/0x4e4 fs/overlayfs/inode.c:41 > notify_change+0x9d4/0xc8c fs/attr.c:499 > chmod_common+0x23c/0x418 fs/open.c:648 > do_fchmodat fs/open.c:696 [inline] > __do_sys_fchmodat fs/open.c:715 [inline] > __se_sys_fchmodat fs/open.c:712 [inline] > __arm64_sys_fchmodat+0x118/0x1dc fs/open.c:712 > __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 > irq event stamp: 862 > hardirqs last enabled at (861): [<ffff8000831abcb4>] percpu_counter_add_batch+0x210/0x30c lib/percpu_counter.c:102 > hardirqs last disabled at (862): [<ffff80008ad66988>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 > softirqs last enabled at (62): [<ffff80008002189c>] softirq_handle_end kernel/softirq.c:399 [inline] > softirqs last enabled at (62): [<ffff80008002189c>] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 > softirqs last disabled at (53): [<ffff80008002ab48>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 > ---[ 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
