Extracting prog: 3m18.605349s Minimizing prog: 1h29m59.428044223s Simplifying prog options: 12m33.367655106s Extracting C: 4m35.775300437s Simplifying C: 0s 1 programs, timeouts [30s 6m0s] 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:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f0000000000)={0x2, 'macvlan0\x00'}, 0x18) r2 = socket$nl_route(0x10, 0x3, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r3, @ANYBLOB, @ANYRES64=r3], 0x60}}, 0x0) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f0000000000)={0x2, 'macvlan0\x00'}, 0x18) r2 = socket$nl_route(0x10, 0x3, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r3, @ANYBLOB, @ANYRES64=r3], 0x60}}, 0x0) program crashed: possible deadlock in gtp_encap_enable_socket single: successfully extracted reproducer found reproducer with 7 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$nl_route-socket$inet_udp detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f0000000000)={0x2, 'macvlan0\x00'}, 0x18) socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$nl_route-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f0000000000)={0x2, 'macvlan0\x00'}, 0x18) r2 = socket$nl_route(0x10, 0x3, 0x0) sendmsg$nl_route(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32, @ANYBLOB, @ANYRES64], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f0000000000)={0x2, 'macvlan0\x00'}, 0x18) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$inet_smc-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) socket$inet_smc(0x2b, 0x1, 0x0) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program crashed: BUG: corrupted list in add_to_unbuddied testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program crashed: INFO: task hung in do_arpt_get_ctl testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: socket(0x840000000002, 0x1, 0x100) r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r1, @ANYBLOB, @ANYRES64=r1], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: sendmsg$ETHTOOL_MSG_COALESCE_SET(0xffffffffffffffff, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r1, @ANYBLOB, @ANYRES64=r1], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, 0x0, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, 0x0, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, 0x0}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={0x0, 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB, @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB, @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route program did not crash simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-sendmsg$ETHTOOL_MSG_COALESCE_SET-socket$nl_route-socket$inet_udp-sendmsg$nl_route detailed listing: executing program 0: r0 = socket(0x840000000002, 0x1, 0x100) sendmsg$ETHTOOL_MSG_COALESCE_SET(r0, &(0x7f00000005c0)={0x0, 0x0, &(0x7f0000000580)={0x0}, 0x1, 0x0, 0x0, 0x4000}, 0x20000000) r1 = socket$nl_route(0x10, 0x3, 0x0) r2 = socket$inet_udp(0x2, 0x2, 0x0) sendmsg$nl_route(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="6000000010000304000000000000000000000300", @ANYRES32=0x0, @ANYBLOB="00000000000000003800128008000100677470002c00028008000100", @ANYRES32=r2, @ANYBLOB, @ANYRES64=r2], 0x60}}, 0x0) program did not crash reproducing took 1h50m27.176370254s repro crashed as (corrupted=false): INFO: task syz-executor:5236 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-00044-g2f87d0916ce0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20608 pid:5236 tgid:5236 ppid:5230 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 xt_request_find_table_lock+0x26/0x100 net/netfilter/x_tables.c:1285 get_info net/ipv4/netfilter/arp_tables.c:808 [inline] do_arpt_get_ctl+0x904/0x16b0 net/ipv4/netfilter/arp_tables.c:1452 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4670 do_sock_getsockopt+0x3c4/0x7e0 net/socket.c:2396 __sys_getsockopt+0x267/0x330 net/socket.c:2425 __do_sys_getsockopt net/socket.c:2435 [inline] __se_sys_getsockopt net/socket.c:2432 [inline] __x64_sys_getsockopt+0xb5/0xd0 net/socket.c:2432 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f766ed7fd3a RSP: 002b:00007ffc9412c6b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f766ed7fd3a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffc9412c6d0 R08: 00007ffc9412c6cc R09: 00007ffc9412cab7 R10: 00007ffc9412c6d0 R11: 0000000000000246 R12: 00007ffc9412c6cc R13: 00000000000481ce R14: 00000000000481a7 R15: 00007ffc9412cdf0 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 1 lock held by kswapd0/79: 1 lock held by klogd/4585: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by dhcpcd/4810: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by getty/4897: #0: ffff88801ebb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000039b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-execprog/5134: #0: ffff88803e1ae8a8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline] #0: ffff88803e1ae8a8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0xd54/0x1950 mm/filemap.c:3350 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5126: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5231: #0: ffff8880006f29b8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff8880006f29b8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5232: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 2 locks held by syz-executor/5233: #0: ffff88801198f220 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff88801198f220 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5234: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5235: #0: ffff88803c3ac808 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff88803c3ac808 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5236: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 25 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00044-g2f87d0916ce0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 final repro crashed as (corrupted=false): INFO: task syz-executor:5236 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-00044-g2f87d0916ce0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20608 pid:5236 tgid:5236 ppid:5230 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 xt_request_find_table_lock+0x26/0x100 net/netfilter/x_tables.c:1285 get_info net/ipv4/netfilter/arp_tables.c:808 [inline] do_arpt_get_ctl+0x904/0x16b0 net/ipv4/netfilter/arp_tables.c:1452 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4670 do_sock_getsockopt+0x3c4/0x7e0 net/socket.c:2396 __sys_getsockopt+0x267/0x330 net/socket.c:2425 __do_sys_getsockopt net/socket.c:2435 [inline] __se_sys_getsockopt net/socket.c:2432 [inline] __x64_sys_getsockopt+0xb5/0xd0 net/socket.c:2432 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f766ed7fd3a RSP: 002b:00007ffc9412c6b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f766ed7fd3a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffc9412c6d0 R08: 00007ffc9412c6cc R09: 00007ffc9412cab7 R10: 00007ffc9412c6d0 R11: 0000000000000246 R12: 00007ffc9412c6cc R13: 00000000000481ce R14: 00000000000481a7 R15: 00007ffc9412cdf0 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 1 lock held by kswapd0/79: 1 lock held by klogd/4585: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by dhcpcd/4810: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by getty/4897: #0: ffff88801ebb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000039b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-execprog/5134: #0: ffff88803e1ae8a8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline] #0: ffff88803e1ae8a8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0xd54/0x1950 mm/filemap.c:3350 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5126: #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #0: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5231: #0: ffff8880006f29b8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff8880006f29b8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5232: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 2 locks held by syz-executor/5233: #0: ffff88801198f220 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff88801198f220 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5234: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 2 locks held by syz-executor/5235: #0: ffff88803c3ac808 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff88803c3ac808 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6228 #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:3907 [inline] #1: ffffffff8ea37160 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xd4/0x3c0 mm/page_alloc.c:3932 1 lock held by syz-executor/5236: #0: ffff88801bba2458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x4c/0x3b0 net/netfilter/x_tables.c:1243 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 25 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00044-g2f87d0916ce0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244