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AKwUvBzfYXiiGlTs4HzysYSSWQ8ERIa/islADBRJO5Jvllnyxg6gIUxqocr6Ig7JDJJukeFdJHazMWhoGD3HsPM=@vger.kernel.org X-Gm-Message-State: AFq9FYJ8laTYM+rSxt+ebTHiFzmZE/LF7a/TlI1yuS342RgNC3aAG+1S 0VvMCyu4mnZpsfF5iAOm5kIKTRcf7+knbT9Ay3SfUuAO+TV7zD4o5pTRaboo5rcnpPbb/+r79MR 5EPXHMK6RBf7ZkORBRjhOArCN/UzqsqxNg6B/m56lo0mbz//O9nVYqewNebY= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:238f:b0:4af:aaca:7be3 with SMTP id 5614622812f47-50b5c9bb14emr6337520b6e.12.1791802862051; Mon, 12 Oct 2026 04:01:02 -0700 (PDT) Date: Mon, 12 Oct 2026 04:01:02 -0700 In-Reply-To: <20261012103322.472-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6accbdee.8cdf6287.1eb53.0125.GAE@google.com> Subject: Re: [syzbot] [nvme?] BUG: corrupted list in nvmet_fc_remove_port From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: user-memory-access Read in nvmet_fc_tgt_a_get ========= ================================================================== BUG: KASAN: user-memory-access in instrument_atomic_read include/linux/instrumented.h:82 [inline] BUG: KASAN: user-memory-access in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] BUG: KASAN: user-memory-access in refcount_read include/linux/refcount.h:170 [inline] BUG: KASAN: user-memory-access in __refcount_add_not_zero include/linux/refcount.h:176 [inline] BUG: KASAN: user-memory-access in __refcount_inc_not_zero include/linux/refcount.h:317 [inline] BUG: KASAN: user-memory-access in refcount_inc_not_zero include/linux/refcount.h:335 [inline] BUG: KASAN: user-memory-access in kref_get_unless_zero include/linux/kref.h:133 [inline] BUG: KASAN: user-memory-access in nvmet_fc_tgt_a_get+0x82/0x1d0 drivers/nvme/target/fc.c:1201 Read of size 4 at addr 000000000008c617 by task syz.1.88/6756 CPU: 0 UID: 0 PID: 6756 Comm: syz.1.88 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 instrument_atomic_read include/linux/instrumented.h:82 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] refcount_read include/linux/refcount.h:170 [inline] __refcount_add_not_zero include/linux/refcount.h:176 [inline] __refcount_inc_not_zero include/linux/refcount.h:317 [inline] refcount_inc_not_zero include/linux/refcount.h:335 [inline] kref_get_unless_zero include/linux/kref.h:133 [inline] nvmet_fc_tgt_a_get+0x82/0x1d0 drivers/nvme/target/fc.c:1201 __nvmet_fc_free_assocs+0x10c/0x380 drivers/nvme/target/fc.c:1480 nvmet_fc_remove_port+0xc5/0x350 drivers/nvme/target/fc.c:2931 nvmet_disable_port+0x13e/0x1f0 drivers/nvme/target/core.c:400 nvmet_port_subsys_drop_link+0x1e8/0x210 drivers/nvme/target/configfs.c:1123 configfs_unlink+0x44f/0x6b0 fs/configfs/symlink.c:258 vfs_unlink+0x27b/0x6e0 fs/namei.c:5678 filename_unlinkat+0x3d3/0x610 fs/namei.c:5748 __do_sys_unlinkat fs/namei.c:5777 [inline] __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5769 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd82566e1d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd824cad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 00007fd8258f6090 RCX: 00007fd82566e1d9 RDX: 0000000000000000 RSI: 0000200000000780 RDI: ffffffffffffff9c RBP: 00007fd825705888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd8258f6128 R14: 00007fd8258f6090 R15: 00007ffe18669a38 ================================================================== Tested on: commit: 24a19b95 Linux 7.3-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1710023e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=df4bbab1c2172b9f dashboard link: https://syzkaller.appspot.com/bug?extid=c98b21427617af7f547a compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=1432149c580000