Date: Wed, 18 Mar 2026 04:33:34 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293888] Fatal trap NUM: general protection fault while in kernel mode in cam_periph_runccb Message-ID: <bug-293888-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293888 Bug ID: 293888 Summary: Fatal trap NUM: general protection fault while in kernel mode in cam_periph_runccb 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 Created attachment 268892 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268892&action=edit kernel config file Hi FreeBSD maintainers, When fuzzing freebsd kernel with syzkaller and our generated syscall descriptions, an issue is discovered in the cam subsystem. This issue is reproducible on the latest release (release/15.0.0-p4, commit 8ef0ed690df2dca0cc22b827819d112f868470bb). We have attached the kernel console output, kernel config, and reproducers to assist with the analysis. The issue report is also listed below (symbolized by our modified syz-symbolize): ``` TITLE: Fatal trap NUM: general protection fault while in kernel mode in cam_periph_runccb CORRUPTED: false () SUPPRESSED: false MAINTAINERS (TO): [] MAINTAINERS (CC): [] Fatal trap 9: general protection fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff80392a6f stack pointer = 0x28:0xfffffe00ec0cc2b0 frame pointer = 0x28:0xfffffe00ec0cc310 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 1604 (syz-executor) rdi: 6e3642f32a3ae742 rsi: ffffffff82e093d0 rdx: 0000000000000000 rcx: fffffe00175ef388 r8: 0000000000000000 r9: 0000000000000001 rax: fffffe0000000000 rbx: 0000000000000900 rbp: fffffe00ec0cc310 r10: fffffe01330db0c8 r11: 000000000000009b r12: 6e3642f32a3ae742 r13: fffffe01330db000 r14: fffffe00ecfcb2e0 r15: 6e3642f32a3ae6f2 trap number = 9 panic: general protection fault cpuid = 0 time = 1773643780 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:887 #3 0xffffffff820f71d5 at trap_fatal+0x105 /usr/obj/usr/src/amd64/amd64/trap.c:969 #4 0xffffffff820f6898 at trap+0xe48 /usr/obj/usr/src/amd64/amd64/trap.c:0 #5 0xffffffff8209f6b8 at calltrap+0x8 /usr/obj/usr/src/amd64/amd64/exception.S:287 #6 0xffffffff80389f28 at cam_periph_runccb+0x2b8 /usr/obj/usr/src/cam/cam_periph.c:0 #7 0xffffffff8040f159 at passsendccb+0x339 /usr/obj/usr/src/cam/scsi/scsi_pass.c:0 #8 0xffffffff8040dfa5 at passdoioctl+0x615 /usr/obj/usr/src/cam/scsi/scsi_pass.c:1830 #9 0xffffffff8040d243 at passioctl+0x33 /usr/obj/usr/src/cam/scsi/scsi_pass.c:1750 #10 0xffffffff811cb236 at devfs_ioctl+0x266 /usr/obj/usr/src/fs/devfs/devfs_vnops.c:0 #11 0xffffffff822b9ad7 at VOP_IOCTL_APV+0x87 /usr/obj/usr/src/amd64.amd64/sys/CLOUD/vnode_if.c:1154 #12 0xffffffff817bd187 at vn_ioctl+0x3c7 /usr/obj/usr/src/amd64.amd64/sys/CLOUD/vnode_if.h:639 #13 0xffffffff811cc0f9 at devfs_ioctl_f+0x69 /usr/obj/usr/src/fs/devfs/devfs_vnops.c:881 #14 0xffffffff81666cfa at kern_ioctl+0x4ca /usr/obj/usr/src/sys/file.h:378 #15 0xffffffff8166673e at sys_ioctl+0x36e /usr/obj/usr/src/kern/sys_generic.c:716 #16 0xffffffff820f9372 at amd64_syscall+0x4e2 /usr/obj/usr/src/kern/subr_syscall.c:193 #17 0xffffffff8209ffab at fast_syscall_common+0xf8 /usr/obj/usr/src/amd64/amd64/exception.S:571 Uptime: 59s Automatic reboot in 15 seconds - press a key on the console to abort TITLE: panic: general protection fault CORRUPTED: false () SUPPRESSED: false MAINTAINERS (TO): [] MAINTAINERS (CC): [] panic: general protection fault cpuid = 0 time = 1773643780 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:887 #3 0xffffffff820f71d5 at trap_fatal+0x105 /usr/obj/usr/src/amd64/amd64/trap.c:969 #4 0xffffffff820f6898 at trap+0xe48 /usr/obj/usr/src/amd64/amd64/trap.c:0 #5 0xffffffff8209f6b8 at calltrap+0x8 /usr/obj/usr/src/amd64/amd64/exception.S:287 #6 0xffffffff80389f28 at cam_periph_runccb+0x2b8 /usr/obj/usr/src/cam/cam_periph.c:0 #7 0xffffffff8040f159 at passsendccb+0x339 /usr/obj/usr/src/cam/scsi/scsi_pass.c:0 #8 0xffffffff8040dfa5 at passdoioctl+0x615 /usr/obj/usr/src/cam/scsi/scsi_pass.c:1830 #9 0xffffffff8040d243 at passioctl+0x33 /usr/obj/usr/src/cam/scsi/scsi_pass.c:1750 #10 0xffffffff811cb236 at devfs_ioctl+0x266 /usr/obj/usr/src/fs/devfs/devfs_vnops.c:0 #11 0xffffffff822b9ad7 at VOP_IOCTL_APV+0x87 /usr/obj/usr/src/amd64.amd64/sys/CLOUD/vnode_if.c:1154 #12 0xffffffff817bd187 at vn_ioctl+0x3c7 /usr/obj/usr/src/amd64.amd64/sys/CLOUD/vnode_if.h:639 #13 0xffffffff811cc0f9 at devfs_ioctl_f+0x69 /usr/obj/usr/src/fs/devfs/devfs_vnops.c:881 #14 0xffffffff81666cfa at kern_ioctl+0x4ca /usr/obj/usr/src/sys/file.h:378 #15 0xffffffff8166673e at sys_ioctl+0x36e /usr/obj/usr/src/kern/sys_generic.c:716 #16 0xffffffff820f9372 at amd64_syscall+0x4e2 /usr/obj/usr/src/kern/subr_syscall.c:193 #17 0xffffffff8209ffab at fast_syscall_common+0xf8 /usr/obj/usr/src/amd64/amd64/exception.S:571 Uptime: 59s Automatic reboot in 15 seconds - press a key on the console to abort ``` -- You are receiving this mail because: You are the assignee for the bug.home | help
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