On Thu, Apr 19, 2018 at 5:57 PM, syzbot <syzbot+37035ccfa9a0a017ffcf@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot hit the following crash on upstream commit > 48023102b7078a6674516b1fe0d639669336049d (Fri Apr 13 23:55:41 2018 +0000) > Merge branch 'overlayfs-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=37035ccfa9a0a017ffcf > > So far this crash happened 141 times on net-next, upstream. > C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5871698234572800 > syzkaller reproducer: > https://syzkaller.appspot.com/x/repro.syz?id=5086177975599104 > Raw console output: > https://syzkaller.appspot.com/x/log.txt?id=5110926181138432 > Kernel config: > https://syzkaller.appspot.com/x/.config?id=-8852471259444315113 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) This seems to be related to keccakf_rndc, please see the "Raw console output" link. +crypto maintainers > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+37035ccfa9a0a017ffcf@xxxxxxxxxxxxxxxxxxxxxxxxx > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > 00000000ed8ccbe7: 0000000000440169 (0x440169) > 00000000469f2a79: 0000000000000033 (0x33) > 000000004636639d: 0000000000000246 (0x246) > 00000000aa65aef8: 00007ffead676158 (0x7ffead676158) > 00000000e3ef297c: 000000000000002b (0x2b) > WARNING: kernel stack frame pointer at 000000004832711f in > syzkaller561281:4479 has bad value 000000006b4f8502 > WARNING: kernel stack regs at 0000000089e11b3b in syzkaller561281:4479 has > bad 'bp' value 00000000f19a2a3b > random: crng init done > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title > If you want to test a patch for this bug, please reply with: > #syz test: git://repo/address.git branch > and provide the patch inline or as an attachment. > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body.
