Extracting prog: 2m48.10028723s
Minimizing prog: 5m51.386773738s
Simplifying prog options: 0s
Extracting C: 29.59432332s
Simplifying C: 8m40.621353611s
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
detailed listing:
executing program 0:
r0 = openat$auto_split_huge_pages_fops_huge_memory(0xffffffffffffff9c, &(0x7f00000000c0), 0x642, 0x0)
write$auto(r0, &(0x7f0000000000)='/sys/kernel/debug/split_huge_pages\x00', 0x800)
program crashed: general protection fault in vsscanf
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory
detailed listing:
executing program 0:
openat$auto_split_huge_pages_fops_huge_memory(0xffffffffffffff9c, &(0x7f00000000c0), 0x642, 0x0)
program did not crash
testing program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$auto
detailed listing:
executing program 0:
write$auto(0xffffffffffffffff, &(0x7f0000000000)='/sys/kernel/debug/split_huge_pages\x00', 0x800)
program did not crash
testing program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
detailed listing:
executing program 0:
r0 = openat$auto_split_huge_pages_fops_huge_memory(0xffffffffffffff9c, 0x0, 0x642, 0x0)
write$auto(r0, &(0x7f0000000000)='/sys/kernel/debug/split_huge_pages\x00', 0x800)
program did not crash
testing program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
detailed listing:
executing program 0:
r0 = openat$auto_split_huge_pages_fops_huge_memory(0xffffffffffffff9c, &(0x7f00000000c0), 0x642, 0x0)
write$auto(r0, 0x0, 0x800)
program did not crash
extracting C reproducer
testing compiled C program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
simplifying C reproducer
testing compiled C program (duration=57.450881505s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
testing compiled C program (duration=57.450881505s, {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}}): openat$auto_split_huge_pages_fops_huge_memory-write$auto
program crashed: general protection fault in vsscanf
reproducing took 17m49.702755049s
repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5824 Comm: syz-executor367 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466
Code: db 74 5e e8 1e ab 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00
RSP: 0018:ffffc90003ab7668 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffffffff8b5c8cc1 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8b16a3d2 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000030 R11: 0000000000000000 R12: ffffffff8b5c8cc1
R13: ffffffff8b5c8cc0 R14: dffffc0000000000 R15: ffffc90003ab7eb0
FS: 000055555d47e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000079692000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sscanf+0xc8/0x100 lib/vsprintf.c:3722
split_huge_pages_write+0xa16/0x1f60 mm/huge_memory.c:4178
full_proxy_write+0xfb/0x1b0 fs/debugfs/file.c:356
vfs_write+0x24c/0x1150 fs/read_write.c:677
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ad967c2e9
Code: 48 83 c4 28 c3 e8 37 17 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:00007ffc718c3608 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffc718c37d8 RCX: 00007f8ad967c2e9
RDX: 0000000000000800 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f8ad96ef610 R08: 0000000000000000 R09: 00007ffc718c37d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc718c37c8 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466
Code: db 74 5e e8 1e ab 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00
RSP: 0018:ffffc90003ab7668 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffffffff8b5c8cc1 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8b16a3d2 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000030 R11: 0000000000000000 R12: ffffffff8b5c8cc1
R13: ffffffff8b5c8cc0 R14: dffffc0000000000 R15: ffffc90003ab7eb0
FS: 000055555d47e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000079692000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 74 5e je 0x60
2: e8 1e ab 82 f6 call 0xf682ab25
7: 49 8d 5d 01 lea 0x1(%r13),%rbx
b: 48 89 e9 mov %rbp,%rcx
e: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
15: fc ff df
18: 48 c1 e9 03 shr $0x3,%rcx
1c: 48 89 5c 24 70 mov %rbx,0x70(%rsp)
21: 49 89 dc mov %rbx,%r12
24: 41 0f b6 45 00 movzbl 0x0(%r13),%eax
* 29: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx <-- trapping instruction
2d: 48 89 e9 mov %rbp,%rcx
30: 83 e1 07 and $0x7,%ecx
33: 38 ca cmp %cl,%dl
35: 7f 08 jg 0x3f
37: 84 d2 test %dl,%dl
39: 0f 85 1e 19 00 00 jne 0x195d
final repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5824 Comm: syz-executor367 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466
Code: db 74 5e e8 1e ab 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00
RSP: 0018:ffffc90003ab7668 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffffffff8b5c8cc1 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8b16a3d2 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000030 R11: 0000000000000000 R12: ffffffff8b5c8cc1
R13: ffffffff8b5c8cc0 R14: dffffc0000000000 R15: ffffc90003ab7eb0
FS: 000055555d47e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000079692000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sscanf+0xc8/0x100 lib/vsprintf.c:3722
split_huge_pages_write+0xa16/0x1f60 mm/huge_memory.c:4178
full_proxy_write+0xfb/0x1b0 fs/debugfs/file.c:356
vfs_write+0x24c/0x1150 fs/read_write.c:677
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ad967c2e9
Code: 48 83 c4 28 c3 e8 37 17 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:00007ffc718c3608 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffc718c37d8 RCX: 00007f8ad967c2e9
RDX: 0000000000000800 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f8ad96ef610 R08: 0000000000000000 R09: 00007ffc718c37d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc718c37c8 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466
Code: db 74 5e e8 1e ab 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00
RSP: 0018:ffffc90003ab7668 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffffffff8b5c8cc1 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8b16a3d2 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000030 R11: 0000000000000000 R12: ffffffff8b5c8cc1
R13: ffffffff8b5c8cc0 R14: dffffc0000000000 R15: ffffc90003ab7eb0
FS: 000055555d47e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000079692000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 74 5e je 0x60
2: e8 1e ab 82 f6 call 0xf682ab25
7: 49 8d 5d 01 lea 0x1(%r13),%rbx
b: 48 89 e9 mov %rbp,%rcx
e: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
15: fc ff df
18: 48 c1 e9 03 shr $0x3,%rcx
1c: 48 89 5c 24 70 mov %rbx,0x70(%rsp)
21: 49 89 dc mov %rbx,%r12
24: 41 0f b6 45 00 movzbl 0x0(%r13),%eax
* 29: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx <-- trapping instruction
2d: 48 89 e9 mov %rbp,%rcx
30: 83 e1 07 and $0x7,%ecx
33: 38 ca cmp %cl,%dl
35: 7f 08 jg 0x3f
37: 84 d2 test %dl,%dl
39: 0f 85 1e 19 00 00 jne 0x195d