Extracting prog: 2m4.745906886s
Minimizing prog: 7m55.829323143s
Simplifying prog options: 0s
Extracting C: 43.262859135s
Simplifying C: 10m15.203544186s


extracting reproducer from 29 programs
first checking the prog from the crash report
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}}): socket$nl_generic-sendmsg$ETHTOOL_MSG_COALESCE_GET-prctl$PR_GET_PDEATHSIG-socket$nl_netfilter-sendmsg$IPSET_CMD_FLUSH
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$ETHTOOL_MSG_COALESCE_GET(r0, &(0x7f0000000bc0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4000}, 0x814)
prctl$PR_GET_PDEATHSIG(0x2, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$IPSET_CMD_FLUSH(r1, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000280)=ANY=[@ANYBLOB="2800000004060102000000004c7f00000500000305000100070000000900020073797a31"], 0x28}}, 0x880)

program crashed: Internal error in sys_prctl
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=42.564566292s, {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}}): socket$nl_generic-sendmsg$ETHTOOL_MSG_COALESCE_GET-prctl$PR_GET_PDEATHSIG-socket$nl_netfilter
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$ETHTOOL_MSG_COALESCE_GET(r0, &(0x7f0000000bc0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4000}, 0x814)
prctl$PR_GET_PDEATHSIG(0x2, 0x0)
socket$nl_netfilter(0x10, 0x3, 0xc)

program crashed: Internal error in sys_prctl
testing program (duration=42.564566292s, {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}}): socket$nl_generic-sendmsg$ETHTOOL_MSG_COALESCE_GET-prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$ETHTOOL_MSG_COALESCE_GET(r0, &(0x7f0000000bc0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4000}, 0x814)
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_prctl
testing program (duration=42.564566292s, {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}}): socket$nl_generic-sendmsg$ETHTOOL_MSG_COALESCE_GET
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$ETHTOOL_MSG_COALESCE_GET(r0, &(0x7f0000000bc0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4000}, 0x814)

program did not crash
testing program (duration=42.564566292s, {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}}): socket$nl_generic-prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_prctl
testing program (duration=42.564566292s, {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}}): prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_prctl
extracting C reproducer
testing compiled C program (duration=42.564566292s, {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}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
simplifying C reproducer
testing compiled C program (duration=42.564566292s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_mount
a never seen crash title: Internal error in sys_mount, ignore
testing compiled C program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing compiled C program (duration=42.564566292s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing compiled C program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing compiled C program (duration=42.564566292s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing compiled C program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing compiled C program (duration=42.564566292s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_GET_PDEATHSIG
program crashed: Internal error in sys_prctl
testing program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_mount
validation run: crashed=true
testing program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_prctl
validation run: crashed=true
testing program (duration=42.564566292s, {Threaded:true 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}}): prctl$PR_GET_PDEATHSIG
detailed listing:
executing program 0:
prctl$PR_GET_PDEATHSIG(0x2, 0x0)

program crashed: Internal error in sys_prctl
validation run: crashed=true
reproducing took 25m18.380744832s
repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4250 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : __do_sys_prctl kernel/sys.c:2319 [inline]
pc : __se_sys_prctl kernel/sys.c:2298 [inline]
pc : __arm64_sys_prctl+0xbe0/0xf14 kernel/sys.c:2298
lr : sign_extend64 include/linux/bitops.h:183 [inline]
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : __do_sys_prctl kernel/sys.c:2319 [inline]
lr : __se_sys_prctl kernel/sys.c:2298 [inline]
lr : __arm64_sys_prctl+0xbac/0xf14 kernel/sys.c:2298
sp : ffff800020be7cc0
x29: ffff800020be7d20 x28: ffff0000d7edb680 x27: ffff800020be7cc0
x26: 1ffff0000417cf98 x25: dfff800000000000 x24: 00000000ffffffda
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: ffff0000d7edbba0 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000081dfaa0 x15: 000000000000003d
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 1fffe0001afdb774 x9 : 00000000fffffff2
x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 __do_sys_prctl kernel/sys.c:2319 [inline]
 __se_sys_prctl kernel/sys.c:2298 [inline]
 __arm64_sys_prctl+0xbe0/0xf14 kernel/sys.c:2298
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 35001248 2a1f03e9 b9400288 b8000aa8 (93407d20) 
---[ end trace 23b74ef4d7a18028 ]---
----------------
Code disassembly (best guess):
   0:	35001248 	cbnz	w8, 0x248
   4:	2a1f03e9 	mov	w9, wzr
   8:	b9400288 	ldr	w8, [x20]
   c:	b8000aa8 	sttr	w8, [x21]
* 10:	93407d20 	sxtw	x0, w9 <-- trapping instruction

final repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4250 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : __do_sys_prctl kernel/sys.c:2319 [inline]
pc : __se_sys_prctl kernel/sys.c:2298 [inline]
pc : __arm64_sys_prctl+0xbe0/0xf14 kernel/sys.c:2298
lr : sign_extend64 include/linux/bitops.h:183 [inline]
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : __do_sys_prctl kernel/sys.c:2319 [inline]
lr : __se_sys_prctl kernel/sys.c:2298 [inline]
lr : __arm64_sys_prctl+0xbac/0xf14 kernel/sys.c:2298
sp : ffff800020be7cc0
x29: ffff800020be7d20 x28: ffff0000d7edb680 x27: ffff800020be7cc0
x26: 1ffff0000417cf98 x25: dfff800000000000 x24: 00000000ffffffda
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: ffff0000d7edbba0 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000081dfaa0 x15: 000000000000003d
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 1fffe0001afdb774 x9 : 00000000fffffff2
x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 __do_sys_prctl kernel/sys.c:2319 [inline]
 __se_sys_prctl kernel/sys.c:2298 [inline]
 __arm64_sys_prctl+0xbe0/0xf14 kernel/sys.c:2298
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 35001248 2a1f03e9 b9400288 b8000aa8 (93407d20) 
---[ end trace 23b74ef4d7a18028 ]---
----------------
Code disassembly (best guess):
   0:	35001248 	cbnz	w8, 0x248
   4:	2a1f03e9 	mov	w9, wzr
   8:	b9400288 	ldr	w8, [x20]
   c:	b8000aa8 	sttr	w8, [x21]
* 10:	93407d20 	sxtw	x0, w9 <-- trapping instruction