Hello, syzbot found the following crash on: HEAD commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11704e29100000 kernel config: https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656 dashboard link: https://syzkaller.appspot.com/bug?extid=3886b8b076850872876e compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3886b8b076850872876e@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ ovl_d_real(/file0, sda1:15683): real dentry not found WARNING: CPU: 0 PID: 10016 at fs/overlayfs/super.c:112 ovl_d_real+0x1ec/0x300 fs/overlayfs/super.c:111 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10016 Comm: syz-executor.3 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1e9/0x30e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:221 __warn+0x209/0x210 kernel/panic.c:582 report_bug+0x1ac/0x2d0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:105 [inline] do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:197 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:ovl_d_real+0x1ec/0x300 fs/overlayfs/super.c:111 Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 1c b6 2b ff 49 8b 0c 24 48 c7 c7 56 03 ef 88 4c 89 f6 48 89 da 31 c0 e8 04 98 be fe <0f> 0b e9 c0 00 00 00 e8 c8 d1 ec fe e9 b3 00 00 00 e8 be d1 ec fe RSP: 0018:ffffc90009507840 EFLAGS: 00010246 RAX: 83d49f6fcdb20800 RBX: ffff888099184698 RCX: 0000000000040000 RDX: ffffc9000fce2000 RSI: 00000000000137b1 RDI: 00000000000137b2 RBP: ffffffff88759760 R08: ffffffff815dd879 R09: ffffed1015d066c8 R10: ffffed1015d066c8 R11: 0000000000000000 R12: ffff8880514d62f8 R13: dffffc0000000000 R14: ffff88808ab6d170 R15: ffff8880887e7e60 d_real include/linux/dcache.h:583 [inline] file_dentry include/linux/fs.h:1332 [inline] fscrypt_file_open+0x2a4/0x310 fs/crypto/hooks.c:41 ext4_file_open+0x193/0x5b0 fs/ext4/file.c:811 do_dentry_open+0x808/0x1020 fs/open.c:828 open_with_fake_path+0x53/0x90 fs/open.c:976 ovl_open_realfile fs/overlayfs/file.c:44 [inline] ovl_open+0x172/0x2b0 fs/overlayfs/file.c:139 do_dentry_open+0x808/0x1020 fs/open.c:828 do_open fs/namei.c:3229 [inline] path_openat+0x2790/0x38b0 fs/namei.c:3346 do_filp_open+0x191/0x3a0 fs/namei.c:3373 do_sys_openat2+0x463/0x770 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] ksys_open include/linux/syscalls.h:1388 [inline] __do_sys_open fs/open.c:1201 [inline] __se_sys_open fs/open.c:1199 [inline] __x64_sys_open+0x1af/0x1e0 fs/open.c:1199 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45cb09 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc620690c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000004f7be0 RCX: 000000000045cb09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000798 R14: 0000000000526dff R15: 00007fc6206916d4 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
