Hi, Thank you for the feedback! On Mon, Sep 26, 2022 at 4:09 AM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > > On Sun, Sep 25, 2022 at 06:40:36PM -0700, syzbot wrote: > > YANTFSBUG; please Cc ntfs maintainers to that. Folks, seriously - > you are fuzzing a specific filesystem, you bloody well ought to Cc > its maintainers. Especially since your subject lines are completely > useless for triage - "[syzbot] WARNING: Nested lock was not taken" > says nothing whatsoever about the report in question. We currently determine the mailing lists / people to Cc depending on the report parsing results, in this case the bug was attributed to the generic fs code, so it was only fs-devel that was included. I filed an issue with a fallback mechanism in case when the reproducer is present: https://github.com/google/syzkaller/issues/3393 > > Ideally - fix the subject lines as well. You want to convince > recepients to open the mail rather than do the default "delete > unopened", after all... I've adjusted the report parsing rules for the "Nested lock was not taken" case (https://github.com/google/syzkaller/pull/3394), which should come into effect in the coming days. > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: c194837ebb57 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=16bb8574880000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=15a770deac0c935a > > dashboard link: https://syzkaller.appspot.com/bug?extid=7475732e7177a19317a1 > > compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 > > userspace arch: arm64 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a45edf080000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e66470880000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/8d8ae425e7fa/disk-c194837e.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/c540d501ebe7/vmlinux-c194837e.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+7475732e7177a19317a1@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > loop4: detected capacity change from 0 to 264192 > > ================================== > > WARNING: Nested lock was not taken > > 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0 Not tainted > > ---------------------------------- > > syz-executor253/3315 is trying to lock: > > ffff0000c495a9d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] > > ffff0000c495a9d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: inode_sb_list_del fs/inode.c:503 [inline] > > ffff0000c495a9d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: evict+0x90/0x334 fs/inode.c:654 > > > > but this task is not holding: > > Unable to handle kernel paging request at virtual address 0000000100000017 > > Mem abort info: > > ESR = 0x0000000096000005 > > EC = 0x25: DABT (current EL), IL = 32 bits > > SET = 0, FnV = 0 > > EA = 0, S1PTW = 0 > > FSC = 0x05: level 1 translation fault > > Data abort info: > > ISV = 0, ISS = 0x00000005 > > CM = 0, WnR = 0 > > user pgtable: 4k pages, 48-bit VAs, pgdp=000000010a8da000 > > [0000000100000017] pgd=0800000107ed2003, p4d=0800000107ed2003, pud=0000000000000000 > > Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP > > Modules linked in: > > CPU: 0 PID: 3315 Comm: syz-executor253 Not tainted 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 > > pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > > pc : print_lock_nested_lock_not_held kernel/locking/lockdep.c:4885 [inline] > > pc : __lock_acquire+0x7cc/0x30a4 kernel/locking/lockdep.c:5044 > > lr : print_lock_nested_lock_not_held kernel/locking/lockdep.c:4884 [inline] > > lr : __lock_acquire+0x7c0/0x30a4 kernel/locking/lockdep.c:5044 > > sp : ffff80001289b8b0 > > x29: ffff80001289b990 x28: 0000000000000001 x27: ffff80000d30c000 > > x26: ffff0000c68d24b8 x25: ffff0000c68d24d8 x24: 0000000000000002 > > x23: ffff0000c68d24d0 x22: ffff80000d32a753 x21: ffff80000d32a712 > > x20: 0000000000040067 x19: ffff0000c68d1a80 x18: 0000000000000156 > > x17: 2b7463697665203a x16: 0000000000000002 x15: 0000000000000000 > > x14: 0000000000000000 x13: 205d353133335420 x12: 5b5d303434313530 > > x11: ff808000081c1630 x10: 0000000000000000 x9 : 30785d1575e13b00 > > x8 : 00000000ffffffff x7 : 205b5d3034343135 x6 : ffff800008195d30 > > x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 > > x2 : 0000000000000000 x1 : 0000000100000001 x0 : ffff80000cb555a1 > > Call trace: > > print_lock_nested_lock_not_held kernel/locking/lockdep.c:4885 [inline] > > __lock_acquire+0x7cc/0x30a4 kernel/locking/lockdep.c:5044 > > lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 > > __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] > > _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154 > > spin_lock include/linux/spinlock.h:349 [inline] > > inode_sb_list_del fs/inode.c:503 [inline] > > evict+0x90/0x334 fs/inode.c:654 > > iput_final fs/inode.c:1748 [inline] > > iput+0x2c4/0x324 fs/inode.c:1774 > > ntfs_fill_super+0x1254/0x14a4 fs/ntfs/super.c:188 > > get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 > > ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 > > vfs_get_tree+0x40/0x140 fs/super.c:1530 > > do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 > > path_mount+0x358/0x914 fs/namespace.c:3370 > > do_mount fs/namespace.c:3383 [inline] > > __do_sys_mount fs/namespace.c:3591 [inline] > > __se_sys_mount fs/namespace.c:3568 [inline] > > __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 > > __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] > > invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] > > el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 > > do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 > > el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 > > el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 > > el0t_64_sync+0x18c/0x190 > > Code: 94f84769 f94002e8 d0024dc0 91168400 (f9400d01) > > ---[ end trace 0000000000000000 ]--- > > ---------------- > > Code disassembly (best guess): > > 0: 94f84769 bl 0x3e11da4 > > 4: f94002e8 ldr x8, [x23] > > 8: d0024dc0 adrp x0, 0x49ba000 > > c: 91168400 add x0, x0, #0x5a1 > > * 10: f9400d01 ldr x1, [x8, #24] <-- trapping instruction > > > > > > --- > > 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. > > syzbot can test patches for this issue, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/YzEJ2D8kga%2BZRDZx%40ZenIV.
