Extracting prog: 47.058113986s
Minimizing prog: 7m13.251065864s
Simplifying prog options: 5m7.480228502s
Extracting C: 35.131953159s
Simplifying C: 0s


extracting reproducer from 71 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=45.430219467s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf
detailed listing:
executing program 0:
openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)

program did not crash
testing program (duration=45.430219467s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
ioctl$UDMABUF_CREATE(0xffffffffffffffff, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program did not crash
testing program (duration=45.430219467s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, 0x0, 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program did not crash
testing program (duration=45.430219467s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.430219467s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
program did not crash
simplifying guilty program options
testing program (duration=45.430219467s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
extracting C reproducer
testing compiled C program (duration=45.430219467s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$udambuf-ioctl$UDMABUF_CREATE
program did not crash
testing program (duration=45.430219467s, {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}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
extracting C reproducer
testing compiled C program (duration=45.430219467s, {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}}): openat$udambuf-ioctl$UDMABUF_CREATE
program did not crash
testing program (duration=45.430219467s, {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}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
validation run: crashed=true
testing program (duration=45.430219467s, {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}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
validation run: crashed=true
testing program (duration=45.430219467s, {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}}): openat$udambuf-ioctl$UDMABUF_CREATE
detailed listing:
executing program 0:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={0xffffffffffffffff, 0x0, 0x100000000, 0x1000000000000})

program crashed: WARNING in udmabuf_create
validation run: crashed=true
reproducing took 21m25.392285052s
repro crashed as (corrupted=false):
------------[ cut here ]------------
!(flags & __GFP_NOWARN)
WARNING: mm/slub.c:7013 at __kvmalloc_node_noprof+0x792/0x820 mm/slub.c:7013, CPU#1: syz.0.17/5853
Modules linked in:
CPU: 1 UID: 0 PID: 5853 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__kvmalloc_node_noprof+0x792/0x820 mm/slub.c:7013
Code: ff 48 c7 c7 70 f7 c8 8e 48 89 de e8 a8 3d eb 02 e9 1f fc ff ff 48 c7 c7 b0 f7 c8 8e 48 89 de e8 94 3d eb 02 e9 50 fc ff ff 90 <0f> 0b 90 31 db e9 08 fe ff ff 90 0f 0b 90 e9 57 ff ff ff 49 83 7f
RSP: 0018:ffffc9000361fae0 EFLAGS: 00010246
RAX: 0000000000000100 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000008000000000 RSI: ffffffff8c4c7660 RDI: ffffffff8c4c7620
RBP: 00000000ffffffff R08: 00000000000028c0 R09: 00000000ffffffff
R10: 0000000000000006 R11: 0000000000000000 R12: 0000008000000000
R13: 00000000000028c0 R14: 0000001000000000 R15: ffffffff865110fc
FS:  0000555584f3a500(0000) GS:ffff88812500c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb165070000 CR3: 000000007b40a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline]
 udmabuf_create+0x2dc/0xf50 drivers/dma-buf/udmabuf.c:386
 udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:465 [inline]
 udmabuf_ioctl+0x1f3/0x300 drivers/dma-buf/udmabuf.c:496
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb16519e0d9
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:00007ffe5ef70e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb165425fa0 RCX: 00007fb16519e0d9
RDX: 0000200000000000 RSI: 0000000040187542 RDI: 0000000000000003
RBP: 00007fb165235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb165425fac R14: 00007fb165425fa0 R15: 00007fb165425fa0
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
!(flags & __GFP_NOWARN)
WARNING: mm/slub.c:7013 at __kvmalloc_node_noprof+0x792/0x820 mm/slub.c:7013, CPU#1: syz.0.17/5853
Modules linked in:
CPU: 1 UID: 0 PID: 5853 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__kvmalloc_node_noprof+0x792/0x820 mm/slub.c:7013
Code: ff 48 c7 c7 70 f7 c8 8e 48 89 de e8 a8 3d eb 02 e9 1f fc ff ff 48 c7 c7 b0 f7 c8 8e 48 89 de e8 94 3d eb 02 e9 50 fc ff ff 90 <0f> 0b 90 31 db e9 08 fe ff ff 90 0f 0b 90 e9 57 ff ff ff 49 83 7f
RSP: 0018:ffffc9000361fae0 EFLAGS: 00010246
RAX: 0000000000000100 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000008000000000 RSI: ffffffff8c4c7660 RDI: ffffffff8c4c7620
RBP: 00000000ffffffff R08: 00000000000028c0 R09: 00000000ffffffff
R10: 0000000000000006 R11: 0000000000000000 R12: 0000008000000000
R13: 00000000000028c0 R14: 0000001000000000 R15: ffffffff865110fc
FS:  0000555584f3a500(0000) GS:ffff88812500c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb165070000 CR3: 000000007b40a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline]
 udmabuf_create+0x2dc/0xf50 drivers/dma-buf/udmabuf.c:386
 udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:465 [inline]
 udmabuf_ioctl+0x1f3/0x300 drivers/dma-buf/udmabuf.c:496
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb16519e0d9
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:00007ffe5ef70e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb165425fa0 RCX: 00007fb16519e0d9
RDX: 0000200000000000 RSI: 0000000040187542 RDI: 0000000000000003
RBP: 00007fb165235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb165425fac R14: 00007fb165425fa0 R15: 00007fb165425fa0
 </TASK>