Extracting prog: 1m19.808409726s Minimizing prog: 6m3.089489236s Simplifying prog options: 0s Extracting C: 26.379879955s Simplifying C: 9m31.398779306s 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:4 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$nl_generic-socket$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: socket$nl_generic(0x10, 0x3, 0x10) r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple single: successfully extracted reproducer found reproducer with 3 syscalls minimizing guilty program testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_generic-socket$nl_netfilter detailed listing: executing program 0: socket$nl_generic(0x10, 0x3, 0x10) socket$nl_netfilter(0x10, 0x3, 0xc) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_generic-sendmsg$NFT_BATCH detailed listing: executing program 0: socket$nl_generic(0x10, 0x3, 0x10) sendmsg$NFT_BATCH(0xffffffffffffffff, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, 0x0, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, 0x0}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={0x0}}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x28}}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x14, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0xb8}}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x14, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0xbc}}, 0x0) program did not crash testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x38, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x4}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0xe0}}, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple simplifying C reproducer testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple 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}}): socket$nl_netfilter-sendmsg$NFT_BATCH program did not crash testing compiled C program (duration=30s, {Threaded:false 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}}): socket$nl_netfilter-sendmsg$NFT_BATCH program did not crash testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_netfilter-sendmsg$NFT_BATCH program did not crash testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$nl_netfilter-sendmsg$NFT_BATCH program did not crash testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program did not crash testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH program crashed: BUG: corrupted list in flow_block_cb_setup_simple testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program crashed: BUG: corrupted list in flow_block_cb_setup_simple validation run: crashed=true testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program crashed: BUG: corrupted list in flow_block_cb_setup_simple validation run: crashed=true testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x1400, &(0x7f0000000040)={&(0x7f0000000200)={{0x14, 0x10, 0x1, 0x0, 0x0, {0x5}}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}, @NFT_MSG_NEWCHAIN={0x5c, 0x3, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_CHAIN_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_CHAIN_NAME={0x9, 0x3, 'syz0\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_HOOKNUM={0x8}, @NFTA_HOOK_PRIORITY={0x8, 0x2, 0x1, 0x0, 0x1}, @NFTA_HOOK_DEV={0x14, 0x3, 'netdevsim0\x00'}]}, @NFTA_CHAIN_FLAGS={0x8, 0xa, 0x1, 0x0, 0x2}]}, @NFT_MSG_NEWRULE={0x60, 0x6, 0xa, 0x401, 0x0, 0x0, {0x5, 0x0, 0xa}, [@NFTA_RULE_TABLE={0x9, 0x1, 'syz0\x00'}, @NFTA_RULE_CHAIN={0x9, 0x2, 'syz0\x00'}, @NFTA_RULE_EXPRESSIONS={0x34, 0x4, 0x0, 0x1, [{0x30, 0x1, 0x0, 0x1, @immediate={{0xe}, @val={0x1c, 0x2, 0x0, 0x1, [@NFTA_IMMEDIATE_DREG={0x8}, @NFTA_IMMEDIATE_DATA={0x10, 0x2, 0x0, 0x1, [@NFTA_DATA_VERDICT={0xc, 0x2, 0x0, 0x1, [@NFTA_VERDICT_CODE={0x8, 0x1, 0x0, 0x1, 0x1}]}]}]}}}]}]}], {0x14, 0x11, 0x1, 0x0, 0x0, {0x5}}}, 0x104}}, 0x0) program crashed: KASAN: slab-use-after-free Read in flow_block_cb_setup_simple validation run: crashed=true reproducing took 19m18.714259535s repro crashed as (corrupted=false): =============================================================== ================================================================== BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x112/0x130 lib/list_debug.c:32 Read of size 8 at addr ffff888059307200 by task syz.0.59/6070 CPU: 0 UID: 0 PID: 6070 Comm: syz.0.59 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 __list_add_valid_or_report+0x112/0x130 lib/list_debug.c:32 __list_add_valid include/linux/list.h:104 [inline] __list_add include/linux/list.h:169 [inline] list_add_tail include/linux/list.h:206 [inline] flow_block_cb_setup_simple+0x75c/0xa20 net/core/flow_offload.c:359 nsim_setup_tc+0x1af/0x200 drivers/net/netdevsim/tc.c:87 nft_block_offload_cmd+0x144/0x2f0 net/netfilter/nf_tables_offload.c:397 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_commit+0x535/0x6a0 net/netfilter/nf_tables_offload.c:584 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f66b219e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd583f5068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f66b2425fa0 RCX: 00007f66b219e559 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f66b2235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66b2425fac R14: 00007f66b2425fa0 R15: 00007f66b2425fa0 Allocated by task 6068: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2f8/0x6d0 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] flow_block_cb_alloc net/core/flow_offload.c:265 [inline] flow_block_cb_setup_simple+0x57c/0xa20 net/core/flow_offload.c:354 nsim_setup_tc+0x1af/0x200 drivers/net/netdevsim/tc.c:87 nft_block_offload_cmd+0x144/0x2f0 net/netfilter/nf_tables_offload.c:397 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_commit+0x535/0x6a0 net/netfilter/nf_tables_offload.c:584 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6068: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6509 [inline] kfree+0x22b/0x6d0 mm/slub.c:6802 nft_flow_offload_unbind.isra.0+0x315/0x4c0 net/netfilter/nf_tables_offload.c:344 nft_block_setup net/netfilter/nf_tables_offload.c:361 [inline] nft_block_offload_cmd+0x295/0x2f0 net/netfilter/nf_tables_offload.c:401 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_abort+0x4c7/0x670 net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x5ac/0x6a0 net/netfilter/nf_tables_offload.c:620 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888059307200 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes inside of freed 192-byte region [ffff888059307200, ffff8880593072c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888059307400 pfn:0x59307 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801d0423c0 ffffea000090ff10 ffffea000098de90 raw: ffff888059307400 000000000010000f 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5867, tgid 5867 (syz-executor), ts 53911275403 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3462 [inline] new_slab+0xa9/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7418 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __kmalloc_cache_noprof+0x4f4/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:663 [inline] netdevice_event+0x308/0x9a0 drivers/infiniband/core/roce_gid_mgmt.c:822 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x110 net/core/dev.c:2275 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline] call_netdevice_notifiers net/core/dev.c:2327 [inline] register_netdevice+0x1998/0x25a0 net/core/dev.c:11587 geneve_configure drivers/net/geneve.c:2106 [inline] geneve_newlink+0x9a2/0x1250 drivers/net/geneve.c:2452 rtnl_newlink_create net/core/rtnetlink.c:3974 [inline] __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0x1697/0x2620 net/core/rtnetlink.c:4220 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7137 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2579 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 page last free pid 5867 tgid 5867 ts 53883347338 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] __kmalloc_cache_noprof+0x278/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4531 [inline] netdev_hold include/linux/netdevice.h:4560 [inline] netdev_hold include/linux/netdevice.h:4555 [inline] rx_queue_add_kobject net/core/net-sysfs.c:1236 [inline] net_rx_queue_update_kobjects+0x32e/0x760 net/core/net-sysfs.c:1301 register_queue_kobjects net/core/net-sysfs.c:2093 [inline] netdev_register_kobject+0x2c6/0x410 net/core/net-sysfs.c:2344 register_netdevice+0x15b6/0x25a0 net/core/dev.c:11549 veth_newlink+0x44a/0xce0 drivers/net/veth.c:1902 rtnl_newlink_create net/core/rtnetlink.c:3974 [inline] __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0x1697/0x2620 net/core/rtnetlink.c:4220 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7137 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2579 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x48b/0x4e0 net/socket.c:2281 Memory state around the buggy address: ffff888059307100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888059307180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888059307200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888059307280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888059307300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== final repro crashed as (corrupted=false): =============================================================== ================================================================== BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x112/0x130 lib/list_debug.c:32 Read of size 8 at addr ffff888059307200 by task syz.0.59/6070 CPU: 0 UID: 0 PID: 6070 Comm: syz.0.59 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 __list_add_valid_or_report+0x112/0x130 lib/list_debug.c:32 __list_add_valid include/linux/list.h:104 [inline] __list_add include/linux/list.h:169 [inline] list_add_tail include/linux/list.h:206 [inline] flow_block_cb_setup_simple+0x75c/0xa20 net/core/flow_offload.c:359 nsim_setup_tc+0x1af/0x200 drivers/net/netdevsim/tc.c:87 nft_block_offload_cmd+0x144/0x2f0 net/netfilter/nf_tables_offload.c:397 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_commit+0x535/0x6a0 net/netfilter/nf_tables_offload.c:584 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f66b219e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd583f5068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f66b2425fa0 RCX: 00007f66b219e559 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f66b2235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66b2425fac R14: 00007f66b2425fa0 R15: 00007f66b2425fa0 Allocated by task 6068: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2f8/0x6d0 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] flow_block_cb_alloc net/core/flow_offload.c:265 [inline] flow_block_cb_setup_simple+0x57c/0xa20 net/core/flow_offload.c:354 nsim_setup_tc+0x1af/0x200 drivers/net/netdevsim/tc.c:87 nft_block_offload_cmd+0x144/0x2f0 net/netfilter/nf_tables_offload.c:397 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_commit+0x535/0x6a0 net/netfilter/nf_tables_offload.c:584 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6068: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6509 [inline] kfree+0x22b/0x6d0 mm/slub.c:6802 nft_flow_offload_unbind.isra.0+0x315/0x4c0 net/netfilter/nf_tables_offload.c:344 nft_block_setup net/netfilter/nf_tables_offload.c:361 [inline] nft_block_offload_cmd+0x295/0x2f0 net/netfilter/nf_tables_offload.c:401 nft_chain_offload_cmd net/netfilter/nf_tables_offload.c:451 [inline] nft_flow_block_chain+0x175/0x4b0 net/netfilter/nf_tables_offload.c:471 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_abort+0x4c7/0x670 net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x5ac/0x6a0 net/netfilter/nf_tables_offload.c:620 nf_tables_commit+0xd7b/0x9300 net/netfilter/nf_tables_api.c:11006 nfnetlink_rcv_batch+0x1a4d/0x2880 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3bd/0x440 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888059307200 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes inside of freed 192-byte region [ffff888059307200, ffff8880593072c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888059307400 pfn:0x59307 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801d0423c0 ffffea000090ff10 ffffea000098de90 raw: ffff888059307400 000000000010000f 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5867, tgid 5867 (syz-executor), ts 53911275403 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3462 [inline] new_slab+0xa9/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7418 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __kmalloc_cache_noprof+0x4f4/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:663 [inline] netdevice_event+0x308/0x9a0 drivers/infiniband/core/roce_gid_mgmt.c:822 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x110 net/core/dev.c:2275 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline] call_netdevice_notifiers net/core/dev.c:2327 [inline] register_netdevice+0x1998/0x25a0 net/core/dev.c:11587 geneve_configure drivers/net/geneve.c:2106 [inline] geneve_newlink+0x9a2/0x1250 drivers/net/geneve.c:2452 rtnl_newlink_create net/core/rtnetlink.c:3974 [inline] __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0x1697/0x2620 net/core/rtnetlink.c:4220 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7137 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2579 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 page last free pid 5867 tgid 5867 ts 53883347338 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] __kmalloc_cache_noprof+0x278/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4531 [inline] netdev_hold include/linux/netdevice.h:4560 [inline] netdev_hold include/linux/netdevice.h:4555 [inline] rx_queue_add_kobject net/core/net-sysfs.c:1236 [inline] net_rx_queue_update_kobjects+0x32e/0x760 net/core/net-sysfs.c:1301 register_queue_kobjects net/core/net-sysfs.c:2093 [inline] netdev_register_kobject+0x2c6/0x410 net/core/net-sysfs.c:2344 register_netdevice+0x15b6/0x25a0 net/core/dev.c:11549 veth_newlink+0x44a/0xce0 drivers/net/veth.c:1902 rtnl_newlink_create net/core/rtnetlink.c:3974 [inline] __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0x1697/0x2620 net/core/rtnetlink.c:4220 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7137 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2579 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x65f/0x950 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x48b/0x4e0 net/socket.c:2281 Memory state around the buggy address: ffff888059307100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888059307180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888059307200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888059307280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888059307300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================