Extracting prog: 1m14.807943314s
Minimizing prog: 14m53.635376966s
Simplifying prog options: 0s
Extracting C: 31.999042515s
Simplifying C: 8m52.730337491s


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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program crashed: WARNING in bitmap_parse_user
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
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}}): mkdirat-mount-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)

program did not crash
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}}): mkdirat-mount-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
write$P9_RLOCK(0xffffffffffffffff, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, 0x0, &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', 0x0, 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program did not crash
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}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
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}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
program crashed: WARNING in bitmap_parse_user
testing program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program crashed: WARNING in bitmap_parse_user
validation run: crashed=true
testing program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program crashed: WARNING in bitmap_parse_user
validation run: crashed=true
testing program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write$P9_RLOCK
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./proc_mnt\x00', 0x1ed)
mount(0x0, &(0x7f0000000240)='./proc_mnt\x00', &(0x7f0000000280)='proc\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./proc_mnt/irq/12/smp_affinity\x00', 0x1, 0x6)
write$P9_RLOCK(r0, &(0x7f0000000380)={0x8, 0x35, 0x3, 0x2}, 0xfffffce2)

program crashed: WARNING in bitmap_parse_user
validation run: crashed=true
reproducing took 29m45.265245702s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4405 at mm/page_alloc.c:5476 current_gfp_context include/linux/sched/mm.h:-1 [inline]
WARNING: CPU: 0 PID: 4405 at mm/page_alloc.c:5476 __alloc_pages+0x39f/0x480 mm/page_alloc.c:5488
Modules linked in:
CPU: 0 PID: 4405 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:__alloc_pages+0x39f/0x480 mm/page_alloc.c:5476
Code: 31 ff e9 b1 fe ff ff e8 bf e8 14 08 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 4f fd ff ff 4c 89 e7 e8 06 d3 09 00 e9 42 fd ff ff <0f> 0b 45 31 ff e9 ee fe ff ff 65 44 8b 2d 97 72 4d 7e 41 83 fd 08
RSP: 0018:ffffc900032dfa00 EFLAGS: 00010246
RAX: ffffc900032dfa40 RBX: 1ffff9200065bf44 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc900032dfa68
RBP: ffffc900032dfaf0 R08: ffffc900032dfa67 R09: ffffc900032dfa40
R10: dffffc0000000000 R11: fffff5200065bf4d R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000040cc0 R15: 0000000000000013
FS:  000055556f419500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb979a1f20 CR3: 0000000073f7e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kmalloc_order+0x40/0x150 mm/slab_common.c:986
 kmalloc_order_trace+0x14/0xf0 mm/slab_common.c:1002
 memdup_user_nul+0x23/0xf0 mm/util.c:260
 bitmap_parse_user+0x1f/0x60 lib/bitmap.c:453
 cpumask_parse_user include/linux/cpumask.h:623 [inline]
 write_irq_affinity kernel/irq/proc.c:153 [inline]
 irq_affinity_proc_write+0x107/0x1d0 kernel/irq/proc.c:182
 pde_write fs/proc/inode.c:335 [inline]
 proc_reg_write+0x1dd/0x2c0 fs/proc/inode.c:347
 vfs_write+0x304/0xd70 fs/read_write.c:592
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbb97ad94d9
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:00007ffc772474e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbb97d55fa0 RCX: 00007fbb97ad94d9
RDX: 00000000fffffce2 RSI: 0000200000000380 RDI: 0000000000000003
RBP: 00007fbb97b6804e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbb97d55fac R14: 00007fbb97d55fa0 R15: 00007fbb97d55fa0
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4405 at mm/page_alloc.c:5476 current_gfp_context include/linux/sched/mm.h:-1 [inline]
WARNING: CPU: 0 PID: 4405 at mm/page_alloc.c:5476 __alloc_pages+0x39f/0x480 mm/page_alloc.c:5488
Modules linked in:
CPU: 0 PID: 4405 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:__alloc_pages+0x39f/0x480 mm/page_alloc.c:5476
Code: 31 ff e9 b1 fe ff ff e8 bf e8 14 08 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 4f fd ff ff 4c 89 e7 e8 06 d3 09 00 e9 42 fd ff ff <0f> 0b 45 31 ff e9 ee fe ff ff 65 44 8b 2d 97 72 4d 7e 41 83 fd 08
RSP: 0018:ffffc900032dfa00 EFLAGS: 00010246
RAX: ffffc900032dfa40 RBX: 1ffff9200065bf44 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc900032dfa68
RBP: ffffc900032dfaf0 R08: ffffc900032dfa67 R09: ffffc900032dfa40
R10: dffffc0000000000 R11: fffff5200065bf4d R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000040cc0 R15: 0000000000000013
FS:  000055556f419500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb979a1f20 CR3: 0000000073f7e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kmalloc_order+0x40/0x150 mm/slab_common.c:986
 kmalloc_order_trace+0x14/0xf0 mm/slab_common.c:1002
 memdup_user_nul+0x23/0xf0 mm/util.c:260
 bitmap_parse_user+0x1f/0x60 lib/bitmap.c:453
 cpumask_parse_user include/linux/cpumask.h:623 [inline]
 write_irq_affinity kernel/irq/proc.c:153 [inline]
 irq_affinity_proc_write+0x107/0x1d0 kernel/irq/proc.c:182
 pde_write fs/proc/inode.c:335 [inline]
 proc_reg_write+0x1dd/0x2c0 fs/proc/inode.c:347
 vfs_write+0x304/0xd70 fs/read_write.c:592
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbb97ad94d9
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:00007ffc772474e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbb97d55fa0 RCX: 00007fbb97ad94d9
RDX: 00000000fffffce2 RSI: 0000200000000380 RDI: 0000000000000003
RBP: 00007fbb97b6804e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbb97d55fac R14: 00007fbb97d55fa0 R15: 00007fbb97d55fa0
 </TASK>