Extracting prog: 4m2.784691203s
Minimizing prog: 25m45.755492065s
Simplifying prog options: 0s
Extracting C: 1m6.122041286s
Simplifying C: 12m21.345351922s


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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, 0x0, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, 0x0, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), 0xffffffffffffffff)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(0xffffffffffffffff, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r0, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r0, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(0x0, r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, 0x0, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014), 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, 0x0, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, 0x0}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={0x0}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, 0x0}, 0x0)

program did not crash
testing program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={0x0}}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
simplifying C reproducer
testing compiled C program (duration=1m40s, {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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program did not crash
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
validation run: crashed=true
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program crashed: BUG: using smp_processor_id() in preemptible code in sk_skb_reason_drop
validation run: crashed=true
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$net_dm-write-sendmsg$NET_DM_CMD_START-sendmsg$NET_DM_CMD_START
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$net_dm(&(0x7f0000000080), r0)
write(0xffffffffffffffff, &(0x7f0000000014)="0500010001000000", 0x8)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000300)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x1c, r1, 0x1, 0x0, 0x0, {0x2}}, 0x1c}}, 0x0)
sendmsg$NET_DM_CMD_START(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000040)={0x14, r1, 0x1}, 0x14}}, 0x0)

program did not crash
validation run: crashed=false
reproducing took 1h2m3.074324554s
repro crashed as (corrupted=false):
BUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/6925
caller is net_dm_packet_trace_kfree_skb_hit+0xdf/0x360 net/core/drop_monitor.c:519
CPU: 1 UID: 0 PID: 6925 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 check_preemption_disabled+0xcd/0xd0 lib/smp_processor_id.c:47
 net_dm_packet_trace_kfree_skb_hit+0xdf/0x360 net/core/drop_monitor.c:519
 __do_trace_kfree_skb include/trace/events/skb.h:24 [inline]
 trace_kfree_skb+0x1d1/0x210 include/trace/events/skb.h:24
 __sk_skb_reason_drop net/core/skbuff.c:1231 [inline]
 sk_skb_reason_drop+0xdd/0x110 net/core/skbuff.c:1249
 kfree_skb_reason include/linux/skbuff.h:1323 [inline]
 __skb_queue_purge_reason include/linux/skbuff.h:3470 [inline]
 skb_queue_purge_reason+0x2e5/0x3a0 net/core/skbuff.c:4040
 skb_queue_purge include/linux/skbuff.h:3483 [inline]
 packet_release+0xb81/0xd00 net/packet/af_packet.c:3213
 __sock_release+0xa0/0x1f0 net/socket.c:735
 sock_close+0x1c/0x30 net/socket.c:1526
 __fput+0x418/0xa50 fs/file_table.c:512
 fput_close_sync+0x11f/0x240 fs/file_table.c:617
 __do_sys_close fs/open.c:1560 [inline]
 __se_sys_close fs/open.c:1545 [inline]
 __x64_sys_close+0x7e/0x110 fs/open.c:1545
 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: 0033:0x7fee41846407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe87a658d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fee417bc780 RCX: 00007fee41846407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000055ca7e57b4b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 000055ca8ec5b580 R14: 0000000000000000 R15: 000055ca7e590ac0
 </TASK>

final repro crashed as (corrupted=false):
BUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/6925
caller is net_dm_packet_trace_kfree_skb_hit+0xdf/0x360 net/core/drop_monitor.c:519
CPU: 1 UID: 0 PID: 6925 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 check_preemption_disabled+0xcd/0xd0 lib/smp_processor_id.c:47
 net_dm_packet_trace_kfree_skb_hit+0xdf/0x360 net/core/drop_monitor.c:519
 __do_trace_kfree_skb include/trace/events/skb.h:24 [inline]
 trace_kfree_skb+0x1d1/0x210 include/trace/events/skb.h:24
 __sk_skb_reason_drop net/core/skbuff.c:1231 [inline]
 sk_skb_reason_drop+0xdd/0x110 net/core/skbuff.c:1249
 kfree_skb_reason include/linux/skbuff.h:1323 [inline]
 __skb_queue_purge_reason include/linux/skbuff.h:3470 [inline]
 skb_queue_purge_reason+0x2e5/0x3a0 net/core/skbuff.c:4040
 skb_queue_purge include/linux/skbuff.h:3483 [inline]
 packet_release+0xb81/0xd00 net/packet/af_packet.c:3213
 __sock_release+0xa0/0x1f0 net/socket.c:735
 sock_close+0x1c/0x30 net/socket.c:1526
 __fput+0x418/0xa50 fs/file_table.c:512
 fput_close_sync+0x11f/0x240 fs/file_table.c:617
 __do_sys_close fs/open.c:1560 [inline]
 __se_sys_close fs/open.c:1545 [inline]
 __x64_sys_close+0x7e/0x110 fs/open.c:1545
 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: 0033:0x7fee41846407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe87a658d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fee417bc780 RCX: 00007fee41846407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000055ca7e57b4b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 000055ca8ec5b580 R14: 0000000000000000 R15: 000055ca7e590ac0
 </TASK>