On Tue, Apr 02, 2019 at 04:39:12PM -0700, Bart Van Assche wrote: > On Mon, 2019-04-01 at 21:29 +0300, Leon Romanovsky wrote: > > On Mon, Apr 01, 2019 at 02:45:54PM -0300, Jason Gunthorpe wrote: > > > On Mon, Apr 01, 2019 at 10:36:05AM -0700, syzbot wrote: > > > > Hello, > > > > > > > > syzbot found the following crash on: > > > > > > > > HEAD commit: e3ecb83e Add linux-next specific files for 20190401 > > > > git tree: linux-next > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=13bc36cd200000 > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=db6c9f2bfeb91a99 > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=2e3e485d5697ea610460 > > > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > > > > > > > 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+2e3e485d5697ea610460@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > > > > > WARNING: CPU: 1 PID: 7 at drivers/infiniband/core/cma.c:4674 > > > > cma_exit_net+0x327/0x390 drivers/infiniband/core/cma.c:4674 > > > > Kernel panic - not syncing: panic_on_warn set ... > > > > > > Matt: This is why the WARN_ON(!xa_empty()) is so valuable. Magically > > > syzkaller can find something in this code is buggy. > > > > > > Mellanox is also showing a different testing failure over the weekend > > > (use after free or something) from your 'cma: Convert portspace IDRs > > > to XArray' > > > > This is what I see in my environment. Bart, This patch [1] will fix it. Thanks [1] https://patchwork.kernel.org/patch/10881501/
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