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Wed, 18 Mar 2026 08:43:45 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293893] panic: _free(NUM): address ADDR(ADDR) has not been allocated Date: Wed, 18 Mar 2026 08:43:45 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 15.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: r772577952@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D293893 Bug ID: 293893 Summary: panic: _free(NUM): address ADDR(ADDR) has not been allocated Product: Base System Version: 15.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: r772577952@gmail.com Hi FreeBSD maintainers, When fuzzing freebsd kernel with syzkaller using our generated syscall descriptions, an issue is discovered in the CAM subsystem, specifically in = the XPT layer. This issue is reproducible on the latest release (release/15.0.0= -p4, commit 8ef0ed690df2dca0cc22b827819d112f868470bb). The kernel console output, kernel config, and C/syz reproducers can be foun= d at https://drive.google.com/drive/folders/1zq43OFQT1r362mQuESyvoXpLxBOztdt0?us= p=3Dsharing. The issue report is also listed below (symbolized by our modified syz-symbolize) to assist with the analysis: ``` TITLE: panic: _free(NUM): address ADDR(ADDR) has not been allocated CORRUPTED: false () SUPPRESSED: false MAINTAINERS (TO): [] MAINTAINERS (CC): [] panic: _free(0): address 0xfffffe012e9707b8(0xfffffe012e970000) has not been allocated cpuid =3D 3 time =3D 1773822689 KDB: stack backtrace: #0 0xffffffff81608a59 at kdb_backtrace+0x119 /usr/obj/usr/src/kern/subr_kdb.c:452 #1 0xffffffff81537d67 at vpanic+0x257 /usr/obj/usr/src/kern/kern_shutdown.c= :960 #2 0xffffffff81537b05 at panic+0xb5 /usr/obj/usr/src/kern/kern_shutdown.c:8= 87 #3 0xffffffff814d706e at free+0x26e /usr/obj/usr/src/kern/kern_malloc.c:975 #4 0xffffffff80398e34 at xpt_release_ccb+0xa4 /usr/obj/usr/src/cam/cam_xpt.= c:0 #5 0xffffffff8039bb5f at xpt_done_process+0x84f /usr/obj/usr/src/cam/cam_xpt.c:5379 #6 0xffffffff803a008c at xpt_done_td+0x2bc /usr/obj/usr/src/cam/cam_xpt.c:5= 431 #7 0xffffffff8149139c at fork_exit+0xcc /usr/obj/usr/src/kern/kern_fork.c:1= 159 #8 0xffffffff820a06de at fork_trampoline+0xe /usr/obj/usr/src/amd64/amd64/exception.S:1066 Uptime: 56s Automatic reboot in 15 seconds - press a key on the console to abort ``` --=20 You are receiving this mail because: You are the assignee for the bug.=