Extracting prog: 1m26.865376982s
Minimizing prog: 12m4.574351337s
Simplifying prog options: 0s
Extracting C: 31.541083406s
Simplifying C: 7m58.24098331s


extracting reproducer from 30 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-bpf$BPF_LINK_CREATE_XDP-open$dir-mmap$xdp-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f00000012c0)={r0, 0x0, 0x30, 0xe1515f8735398fb, @val=@uprobe_multi={&(0x7f0000000140)='./file0\x00', &(0x7f00000001c0)=[0x5], 0x0, 0x0, 0x1, 0x1}}, 0x40)
r1 = open$dir(&(0x7f0000000000)='./file0\x00', 0xc802, 0x16b)
mmap$xdp(&(0x7f0000ffc000/0x4000)=nil, 0x4000, 0x0, 0x12, r1, 0x0)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-bpf$BPF_LINK_CREATE_XDP-open$dir-mmap$xdp-munmap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f00000012c0)={r0, 0x0, 0x30, 0xe1515f8735398fb, @val=@uprobe_multi={&(0x7f0000000140)='./file0\x00', &(0x7f00000001c0)=[0x5], 0x0, 0x0, 0x1, 0x1}}, 0x40)
r1 = open$dir(&(0x7f0000000000)='./file0\x00', 0xc802, 0x16b)
mmap$xdp(&(0x7f0000ffc000/0x4000)=nil, 0x4000, 0x0, 0x12, r1, 0x0)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)

program did not crash
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-bpf$BPF_LINK_CREATE_XDP-open$dir-mmap$xdp-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f00000012c0)={r0, 0x0, 0x30, 0xe1515f8735398fb, @val=@uprobe_multi={&(0x7f0000000140)='./file0\x00', &(0x7f00000001c0)=[0x5], 0x0, 0x0, 0x1, 0x1}}, 0x40)
r1 = open$dir(&(0x7f0000000000)='./file0\x00', 0xc802, 0x16b)
mmap$xdp(&(0x7f0000ffc000/0x4000)=nil, 0x4000, 0x0, 0x12, r1, 0x0)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program did not crash
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-bpf$BPF_LINK_CREATE_XDP-open$dir-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f00000012c0)={r0, 0x0, 0x30, 0xe1515f8735398fb, @val=@uprobe_multi={&(0x7f0000000140)='./file0\x00', &(0x7f00000001c0)=[0x5], 0x0, 0x0, 0x1, 0x1}}, 0x40)
open$dir(&(0x7f0000000000)='./file0\x00', 0xc802, 0x16b)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-bpf$BPF_LINK_CREATE_XDP-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f00000012c0)={r0, 0x0, 0x30, 0xe1515f8735398fb, @val=@uprobe_multi={&(0x7f0000000140)='./file0\x00', &(0x7f00000001c0)=[0x5], 0x0, 0x0, 0x1, 0x1}}, 0x40)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-truncate-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
truncate(&(0x7f0000000180)='./file0\x00', 0x8fff5)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-bpf$PROG_LOAD-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
bpf$PROG_LOAD(0x5, &(0x7f0000000040)={0x2, 0x4, &(0x7f0000000200)=ANY=[@ANYBLOB="180000000300000000000000feffff10850000000700000095"], &(0x7f0000000100)='syzkaller\x00', 0x0, 0x0, 0x0, 0x100, 0x70, '\x00', 0x0, @fallback=0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @void, @value}, 0x94)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): creat-munmap-mremap
detailed listing:
executing program 0:
creat(&(0x7f00000002c0)='./file0\x00', 0x109)
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
detailed listing:
executing program 0:
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil) (fail_nth: 1)

program crashed: general protection fault in mremap
testing program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
detailed listing:
executing program 0:
munmap(&(0x7f0000ffd000/0x2000)=nil, 0x2000)
mremap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x3000, 0x0, &(0x7f0000ffa000/0x3000)=nil)

program did not crash
extracting C reproducer
testing compiled C program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
simplifying C reproducer
testing compiled C program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
testing compiled C program (duration=49.85565148s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): munmap-mremap
program crashed: general protection fault in mremap
reproducing took 22m1.221823286s
repro crashed as (corrupted=false):
RBP: 0000000000000001 R08: 0000200000ffa000 R09: 00007f9923060031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f992305c618
R13: 00007ffd62642758 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 5815 Comm: syz-executor344 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc900041afd20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff888025323200 RCX: ffffffff821183c6
RDX: ffff88807bd00000 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff8880317bedc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000001 R12: 0000000000002000
R13: 1ffff92000835faa R14: 0000200000ffc000 R15: ffff888025323370
FS:  000055555d59e380(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa158bc000 CR3: 0000000031a62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9922ff12e9
Code: 48 83 c4 28 c3 e8 17 1a 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd62642578 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007ffd62642580 RCX: 00007f9922ff12e9
RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000
RBP: 0000000000000001 R08: 0000200000ffa000 R09: 00007f9923060031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f992305c618
R13: 00007ffd62642758 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc900041afd20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff888025323200 RCX: ffffffff821183c6
RDX: ffff88807bd00000 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff8880317bedc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000001 R12: 0000000000002000
R13: 1ffff92000835faa R14: 0000200000ffc000 R15: ffff888025323370
FS:  000055555d59e380(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa158bc000 CR3: 0000000031a62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 85 45 02 00 00    	jne    0x24b
   6:	48 8b 04 24          	mov    (%rsp),%rax
   a:	c6 84 24 70 01 00 00 	movb   $0x1,0x170(%rsp)
  11:	01
  12:	48 01 85 68 02 00 00 	add    %rax,0x268(%rbp)
  19:	eb 9a                	jmp    0xffffffb5
  1b:	e8 18 34 af ff       	call   0xffaf3438
  20:	48 b8 04 00 00 00 00 	movabs $0xdffffc0000000004,%rax
  27:	fc ff df
* 2a:	80 38 00             	cmpb   $0x0,(%rax) <-- trapping instruction
  2d:	0f 85 a7 01 00 00    	jne    0x1da
  33:	48 8b 2c 25 20 00 00 	mov    0x20,%rbp
  3a:	00
  3b:	31 ff                	xor    %edi,%edi
  3d:	81                   	.byte 0x81
  3e:	e5 00                	in     $0x0,%eax

final repro crashed as (corrupted=false):
RBP: 0000000000000001 R08: 0000200000ffa000 R09: 00007f9923060031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f992305c618
R13: 00007ffd62642758 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 5815 Comm: syz-executor344 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc900041afd20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff888025323200 RCX: ffffffff821183c6
RDX: ffff88807bd00000 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff8880317bedc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000001 R12: 0000000000002000
R13: 1ffff92000835faa R14: 0000200000ffc000 R15: ffff888025323370
FS:  000055555d59e380(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa158bc000 CR3: 0000000031a62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9922ff12e9
Code: 48 83 c4 28 c3 e8 17 1a 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd62642578 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007ffd62642580 RCX: 00007f9922ff12e9
RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000
RBP: 0000000000000001 R08: 0000200000ffa000 R09: 00007f9923060031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f992305c618
R13: 00007ffd62642758 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc900041afd20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff888025323200 RCX: ffffffff821183c6
RDX: ffff88807bd00000 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff8880317bedc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000001 R12: 0000000000002000
R13: 1ffff92000835faa R14: 0000200000ffc000 R15: ffff888025323370
FS:  000055555d59e380(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa158bc000 CR3: 0000000031a62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 85 45 02 00 00    	jne    0x24b
   6:	48 8b 04 24          	mov    (%rsp),%rax
   a:	c6 84 24 70 01 00 00 	movb   $0x1,0x170(%rsp)
  11:	01
  12:	48 01 85 68 02 00 00 	add    %rax,0x268(%rbp)
  19:	eb 9a                	jmp    0xffffffb5
  1b:	e8 18 34 af ff       	call   0xffaf3438
  20:	48 b8 04 00 00 00 00 	movabs $0xdffffc0000000004,%rax
  27:	fc ff df
* 2a:	80 38 00             	cmpb   $0x0,(%rax) <-- trapping instruction
  2d:	0f 85 a7 01 00 00    	jne    0x1da
  33:	48 8b 2c 25 20 00 00 	mov    0x20,%rbp
  3a:	00
  3b:	31 ff                	xor    %edi,%edi
  3d:	81                   	.byte 0x81
  3e:	e5 00                	in     $0x0,%eax