On Mon, Jan 20, 2025 at 8:54 AM Niklas Cassel <cassel@xxxxxxxxxx> wrote: > > On Fri, Jan 17, 2025 at 11:42:45AM -0500, reveliofuzzing wrote: > > > > > > However, the .config you provided does not match the bzImage. > > > E.g. the e1000/e1000e driver is not built-in in your .config, > > > so I get no networking, while it is enabled in your bzImage. > > > This makes me worried that you have other changes in your .config. > > > If you still have the exact config for this bzImage, could you please add > > > it as an attachment? > > Hi, we double-checked it but found the config shared above is the one we used. > > CONFIG_E1000XXX is enabled in this config. > > You are right. > > For some reason it got compiled as a module when I did "make olddefconfig", > with your config as base. Sorry about the confusion! > > > > > > > > > > I've been using the syz-executor binary that you attached, since the C code > > > pasted below does not compile, it seems like it has some unintended newlines. > > > Perhaps you could add it as an attachment instead? > > Here is the C program: > > https://drive.google.com/file/d/1Uvhqrn-ntEYQT2PBiQjp0xaor-32WYHO/view?usp=sharing > > Please let us know if you still can't compile it. We can take a look > > at how Syzkaller > > generates this C program and compiles it into the syz-executor binary. > > Still does not compile for me. > > It still appears to have some uninteded newlines. > > You probably copy pasted it from an editor instead of uploading it/sending > it directly. > > > One example is: > line380: if (write(1, "executing program\n", sizeof("executing > line381: program\n") - 1)) {} > > Strings in C are not allowed to span multiple lines without a backslash > immediately before the newline, or by using string concatenation. Hi, we have updated the c program here: https://drive.google.com/file/d/1Uvhqrn-ntEYQT2PBiQjp0xaor-32WYHO/view?usp=sharing This was the command used for compiling it: gcc -o /tmp/syz-executor -DGOOS_linux=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie < ./reproducer.c > > > > > > > > > > Also, you only talk about 6.12 kernel. Out of curiosity, have you managed to > > > reproduce this bug on v6.13-rc kernels? Have you tried? > > We haven't tried it yet, but we can do that in the next few days. Will keep you > > posted. > > I got an off-list email that mentioned that you could reproduce on 6.13-rc7, > thank you! > > Hopefully I will have some time to try to debug this sometime this week. > > > Kind regards, > Niklas
