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AHgh+RrROLQ1NOjeOxejiQfrR9mTdOci2vrmqwXSBBbvlkyX3U175OrisLc1opxvLajSI0KtkbVXY7Bz3eMYZQA=@vger.kernel.org X-Gm-Message-State: AFuF++kioHDu4Ye4J6cgEb9lI7mmWjPihsqvXZECbeBOk3t1GYcqkcza 6IYdNK7xIQIIg14ULHe0Gq1LWXAw4ks4fS9bZcrEIY1epf7Jyv8q58nUdx/5XGaOxeDb+TPc+m4 EePKhUF58cpmi6SK5hsFz/aAHBHOGyudU5/TAf2TljG7y+anC8227UmyB0S4= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:10d6:b0:487:530f:5754 with SMTP id 5614622812f47-4b2ef571690mr16781390b6e.20.1787439391964; Sat, 22 Aug 2026 15:56:31 -0700 (PDT) Date: Sat, 22 Aug 2026 15:56:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8a291f.dbb3a75c.13dd47.0037.GAE@google.com> Subject: [syzbot] [rdma?] KASAN: null-ptr-deref Read in trace_event_raw_event_rtrs_clt_conn_class From: syzbot To: haris.iqbal@ionos.com, jgg@ziepe.ca, jinpu.wang@ionos.com, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 21d6ac051080 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=13e45549580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=1695193198994f4e7fed compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=146f8625580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f7c415580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/88380e2ddcb9/disk-21d6ac05.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5dba5c2896b7/vmlinux-21d6ac05.xz kernel image: https://storage.googleapis.com/syzbot-assets/52ac739e37e0/Image-21d6ac05.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1695193198994f4e7fed@syzkaller.appspotmail.com rtrs_client L2098: : Failed to resolve address, err: -ENODEV rtrs_client L2641: : init_conns() failed: err=-ENODEV path=@ip:127.0.0.1 [:0] ================================================================== BUG: KASAN: null-ptr-deref in do_trace_event_raw_event_rtrs_clt_conn_class drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:58 [inline] BUG: KASAN: null-ptr-deref in trace_event_raw_event_rtrs_clt_conn_class+0x220/0x480 drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:36 Read of size 255 at addr 0000000000000000 by task syz.0.17/4921 CPU: 0 UID: 0 PID: 4921 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_report+0x58/0x84 mm/kasan/report.c:485 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x17c/0x1ac mm/kasan/generic.c:200 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105 do_trace_event_raw_event_rtrs_clt_conn_class drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:58 [inline] trace_event_raw_event_rtrs_clt_conn_class+0x220/0x480 drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:36 __traceiter_rtrs_clt_close_conns+0x74/0xc8 drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:77 __do_trace_rtrs_clt_close_conns drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:77 [inline] trace_rtrs_clt_close_conns drivers/infiniband/ulp/rtrs/rtrs-clt-trace.h:77 [inline] rtrs_clt_close_conns+0x2f0/0x40c drivers/infiniband/ulp/rtrs/rtrs-clt.c:1949 rtrs_clt_open+0xa6c/0xd54 drivers/infiniband/ulp/rtrs/rtrs-clt.c:2858 find_and_get_or_create_sess drivers/block/rnbd/rnbd-clt.c:1268 [inline] rnbd_clt_map_device+0xcb8/0x1f64 drivers/block/rnbd/rnbd-clt.c:1551 rnbd_clt_map_device_store+0x900/0xad8 drivers/block/rnbd/rnbd-clt-sysfs.c:612 dev_attr_store+0x6c/0x90 drivers/base/core.c:2505 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x19c/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 ================================================================== --- This report 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@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup