Extracting prog: 1m38.91926061s Minimizing prog: 3m52.894856492s Simplifying prog options: 0s Extracting C: 24.07818652s Simplifying C: 5m53.352594721s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program crashed: WARNING in udmabuf_create single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf detailed listing: executing program 0: openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: ioctl$UDMABUF_CREATE_LIST(0xffffffffffffffff, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, 0x0, 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create simplifying C reproducer testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST program crashed: WARNING in udmabuf_create testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program crashed: WARNING in udmabuf_create validation run: crashed=true testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program crashed: WARNING in udmabuf_create validation run: crashed=true testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE_LIST detailed listing: executing program 0: r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000000), 0x2) ioctl$UDMABUF_CREATE_LIST(r0, 0x40087543, &(0x7f0000000080)={0x0, 0x2, [{0xffffffffffffffff, 0x0, 0x1000000, 0x1000000000000}, {0xffffffffffffffff, 0x0, 0x0, 0x1000000}]}) program crashed: WARNING in udmabuf_create validation run: crashed=true reproducing took 14m5.134682715s repro crashed as (corrupted=false): ------------[ cut here ]------------ WARNING: mm/slub.c:7013 at __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1, CPU#0: syz.0.17/4912 Modules linked in: CPU: 0 UID: 0 PID: 4912 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1 lr : __do_kmalloc_node mm/slub.c:-1 [inline] lr : __kvmalloc_node_noprof+0x400/0x7fc mm/slub.c:7005 sp : ffff800098177930 x29: ffff800098177980 x28: 00000000ffffffff x27: 0000001000000000 x26: 0000000001000000 x25: 0000000000000000 x24: 00000000000028c0 x23: ffff8000826af1f8 x22: ffff0000c5a92bc0 x21: 0000008000008000 x20: ffff70001302ef58 x19: 0000000000000000 x18: 0000000000000000 x17: ffff800080167690 x16: ffff800080d14b9c x15: ffff8000826aef70 x14: ffff8000826af0ac x13: 0000000000000005 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000003 x9 : ffff800088bb0aa0 x8 : 0000000000000cc0 x7 : 0000000000000000 x6 : ffff800080bb9c2c x5 : 00000000ffffffff x4 : 00000000000028c0 x3 : 0000010000000000 x2 : 0000008000008000 x1 : ffff0000d1bbd880 x0 : 0000000000000001 Call trace: __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1 (P) init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline] udmabuf_create+0x220/0xb34 drivers/dma-buf/udmabuf.c:386 udmabuf_ioctl_create_list drivers/dma-buf/udmabuf.c:484 [inline] udmabuf_ioctl+0x24c/0x2b4 drivers/dma-buf/udmabuf.c:499 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/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 irq event stamp: 712 hardirqs last enabled at (711): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline] hardirqs last enabled at (711): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:221 hardirqs last disabled at (712): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (222): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (222): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (222): [] do_sve_acc+0x32c/0x4b8 arch/arm64/kernel/fpsimd.c:1349 softirqs last disabled at (220): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (220): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (220): [] do_sve_acc+0x10c/0x4b8 arch/arm64/kernel/fpsimd.c:1325 ---[ end trace 0000000000000000 ]--- final repro crashed as (corrupted=false): ------------[ cut here ]------------ WARNING: mm/slub.c:7013 at __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1, CPU#0: syz.0.17/4912 Modules linked in: CPU: 0 UID: 0 PID: 4912 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1 lr : __do_kmalloc_node mm/slub.c:-1 [inline] lr : __kvmalloc_node_noprof+0x400/0x7fc mm/slub.c:7005 sp : ffff800098177930 x29: ffff800098177980 x28: 00000000ffffffff x27: 0000001000000000 x26: 0000000001000000 x25: 0000000000000000 x24: 00000000000028c0 x23: ffff8000826af1f8 x22: ffff0000c5a92bc0 x21: 0000008000008000 x20: ffff70001302ef58 x19: 0000000000000000 x18: 0000000000000000 x17: ffff800080167690 x16: ffff800080d14b9c x15: ffff8000826aef70 x14: ffff8000826af0ac x13: 0000000000000005 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000003 x9 : ffff800088bb0aa0 x8 : 0000000000000cc0 x7 : 0000000000000000 x6 : ffff800080bb9c2c x5 : 00000000ffffffff x4 : 00000000000028c0 x3 : 0000010000000000 x2 : 0000008000008000 x1 : ffff0000d1bbd880 x0 : 0000000000000001 Call trace: __kvmalloc_node_noprof+0x6e0/0x7fc mm/slub.c:-1 (P) init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline] udmabuf_create+0x220/0xb34 drivers/dma-buf/udmabuf.c:386 udmabuf_ioctl_create_list drivers/dma-buf/udmabuf.c:484 [inline] udmabuf_ioctl+0x24c/0x2b4 drivers/dma-buf/udmabuf.c:499 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/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 irq event stamp: 712 hardirqs last enabled at (711): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline] hardirqs last enabled at (711): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:221 hardirqs last disabled at (712): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (222): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (222): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (222): [] do_sve_acc+0x32c/0x4b8 arch/arm64/kernel/fpsimd.c:1349 softirqs last disabled at (220): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (220): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (220): [] do_sve_acc+0x10c/0x4b8 arch/arm64/kernel/fpsimd.c:1325 ---[ end trace 0000000000000000 ]---