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dmarc=pass (policy=none) header.from=oracle.com; spf=none (imf30.hostedemail.com: domain of liam.howlett@oracle.com has no SPF policy when checking 205.220.177.32) smtp.mailfrom=liam.howlett@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2021-07-09 header.b=Z4Jl6dyo; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=UFiBjaAl; dmarc=pass (policy=none) header.from=oracle.com; spf=none (imf30.hostedemail.com: domain of liam.howlett@oracle.com has no SPF policy when checking 205.220.177.32) smtp.mailfrom=liam.howlett@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 8E5E980080 X-Stat-Signature: 5n7rnqyo8yek4bwsjd37hjxkixf5c7ue X-HE-Tag: 1655319323-103264 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: * Yu Zhao [220615 14:08]: > On Wed, Jun 15, 2022 at 8:25 AM Liam Howlett wr= ote: > > > > * Yu Zhao [220611 17:50]: > > > On Sat, Jun 11, 2022 at 2:11 PM Yu Zhao wrote: > > > > > > > > On Mon, Jun 6, 2022 at 10:40 AM Qian Cai = wrote: > > > > > > > > > > On Mon, Jun 06, 2022 at 04:19:52PM +0000, Liam Howlett wrote: > > > > > > Does your syscall fuzzer create a reproducer? This looks like = arm64 > > > > > > and says 5.18.0-next-20220603 again. Was this bisected to the = patch > > > > > > above? > > > > > > > > > > This was triggered by running the fuzzer over the weekend. > > > > > > > > > > $ trinity -C 160 > > > > > > > > > > No bisection was done. It was only brought up here because the tr= ace > > > > > pointed to do_mas_munmap() which was introduced here. > > > > > > > > Liam, > > > > > > > > I'm getting a similar crash on arm64 -- the allocator is madvise(), > > > > not mprotect(). Please take a look. > > > > > > Another crash on x86_64, which seems different: > > > > Thanks for this. I was able to reproduce the other crashes that you an= d > > Qian reported. I've sent out a patch set to Andrew to apply to the > > branch which includes the fix for them and an unrelated issue discovere= d > > when I wrote the testcases to cover what was going on here. >=20 > Thanks. I'm restarting the test and will report the results in a few hour= s. >=20 > > > BUG: KASAN: slab-out-of-bounds in mab_mas_cp+0x2d9/0x6c0 > > > Write of size 136 at addr ffff88c5a2319c80 by task stress-ng/18461 > ^^^^^^^^^ >=20 > > As for this crash, I was unable to reproduce and the code I just sent > > out changes this code a lot. Was this running with "trinity -c madvise= " > > or another use case/fuzzer? >=20 > This is also stress-ng (same as the one on arm64). The test stopped > before it could try syzkaller (fuzzer). Thanks. What are the arguments to stress-ng you use? I've run "stress-ng --class vm -a 20 -t 600s --temp-path /tmp" until it OOMs on my vm, but it only has 8GB of ram. Regards, Liam