Extracting prog: 6m37.313017106s
Minimizing prog: 13m50.497801631s
Simplifying prog options: 4m5.095071858s
Extracting C: 1m15.053750632s
Simplifying C: 0s


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:5 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: general protection fault in uea_upload_pre_firmware
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x0, 0x0, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): syz_usb_connect
program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
a never seen crash title: KASAN: slab-use-after-free Read in uea_upload_pre_firmware, ignore
simplifying guilty program options
testing program (duration=6m47.946122695s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
a never seen crash title: KASAN: slab-use-after-free Read in uea_upload_pre_firmware, ignore
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: general protection fault in uea_upload_pre_firmware
extracting C reproducer
testing compiled C program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
a never seen crash title: KASAN: slab-use-after-free Read in uea_upload_pre_firmware, ignore
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
validation run: crashed=true
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
validation run: crashed=true
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
validation run: crashed=false
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
validation run: crashed=false
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
validation run: crashed=false
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
validation run: crashed=false
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program did not crash
validation run: crashed=false
testing program (duration=6m47.946122695s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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: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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0})

program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware
validation run: crashed=true
reproducing took 1h4m20.554062478s
repro crashed as (corrupted=false):
usb 4-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
==================================================================
BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline]
BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598
Read of size 8 at addr ffff88811dc4c0b8 by task kworker/0:0/3011

CPU: 0 UID: 0 PID: 3011 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 __intf_to_usbdev include/linux/usb.h:752 [inline]
 uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598
 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 3497:
 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:398 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x35e/0x670 mm/slub.c:5515
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 usb_set_configuration+0x10cb/0x1c60 drivers/usb/core/message.c:2096
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2700
 hub_port_connect drivers/usb/core/hub.c:5572 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5712 [inline]
 port_event drivers/usb/core/hub.c:5876 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5958
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 3497:
 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:253 [inline]
 __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2705 [inline]
 slab_free mm/slub.c:6405 [inline]
 kfree+0x20c/0x650 mm/slub.c:6720
 device_release+0xd2/0x270 drivers/base/core.c:2636
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3880
 usb_disable_device+0x44a/0x810 drivers/usb/core/message.c:1485
 usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2350
 hub_port_connect drivers/usb/core/hub.c:5412 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5712 [inline]
 port_event drivers/usb/core/hub.c:5876 [inline]
 hub_event+0x1d0c/0x4af0 drivers/usb/core/hub.c:5958
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88811dc4c000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 184 bytes inside of
 freed 2048-byte region [ffff88811dc4c000, ffff88811dc4c800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dc48
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
head: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122
head: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
head: 0200000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2860, tgid 2860 (udevd), ts 18174072497, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859
 prep_new_page mm/page_alloc.c:1867 [inline]
 get_page_from_freelist+0xf25/0x3400 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x28f/0x2b90 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab mm/slub.c:3408 [inline]
 new_slab+0xa2/0x670 mm/slub.c:3454
 refill_objects+0xe3/0x410 mm/slub.c:7338
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703
 alloc_from_pcs mm/slub.c:4801 [inline]
 slab_alloc_node mm/slub.c:4933 [inline]
 __do_kmalloc_node mm/slub.c:5361 [inline]
 __kmalloc_node_track_caller_noprof+0x619/0x7d0 mm/slub.c:5497
 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637
 __alloc_skb+0x185/0x710 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1384 [inline]
 netlink_alloc_large_skb+0x69/0x150 net/netlink/af_netlink.c:1185
 netlink_sendmsg+0x680/0xda0 net/netlink/af_netlink.c:1875
 sock_sendmsg_nosec net/socket.c:775 [inline]
 __sock_sendmsg net/socket.c:790 [inline]
 ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738
 __sys_sendmsg+0x160/0x210 net/socket.c:2770
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88811dc4bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811dc4c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811dc4c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88811dc4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811dc4c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
usb 4-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
==================================================================
BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline]
BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598
Read of size 8 at addr ffff88811dc4c0b8 by task kworker/0:0/3011

CPU: 0 UID: 0 PID: 3011 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 __intf_to_usbdev include/linux/usb.h:752 [inline]
 uea_upload_pre_firmware+0x3bd/0x3d0 drivers/usb/atm/ueagle-atm.c:598
 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 3497:
 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:398 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x35e/0x670 mm/slub.c:5515
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 usb_set_configuration+0x10cb/0x1c60 drivers/usb/core/message.c:2096
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2700
 hub_port_connect drivers/usb/core/hub.c:5572 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5712 [inline]
 port_event drivers/usb/core/hub.c:5876 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5958
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 3497:
 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:253 [inline]
 __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2705 [inline]
 slab_free mm/slub.c:6405 [inline]
 kfree+0x20c/0x650 mm/slub.c:6720
 device_release+0xd2/0x270 drivers/base/core.c:2636
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3880
 usb_disable_device+0x44a/0x810 drivers/usb/core/message.c:1485
 usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2350
 hub_port_connect drivers/usb/core/hub.c:5412 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5712 [inline]
 port_event drivers/usb/core/hub.c:5876 [inline]
 hub_event+0x1d0c/0x4af0 drivers/usb/core/hub.c:5958
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88811dc4c000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 184 bytes inside of
 freed 2048-byte region [ffff88811dc4c000, ffff88811dc4c800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dc48
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
head: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122
head: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
head: 0200000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2860, tgid 2860 (udevd), ts 18174072497, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859
 prep_new_page mm/page_alloc.c:1867 [inline]
 get_page_from_freelist+0xf25/0x3400 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x28f/0x2b90 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab mm/slub.c:3408 [inline]
 new_slab+0xa2/0x670 mm/slub.c:3454
 refill_objects+0xe3/0x410 mm/slub.c:7338
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703
 alloc_from_pcs mm/slub.c:4801 [inline]
 slab_alloc_node mm/slub.c:4933 [inline]
 __do_kmalloc_node mm/slub.c:5361 [inline]
 __kmalloc_node_track_caller_noprof+0x619/0x7d0 mm/slub.c:5497
 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637
 __alloc_skb+0x185/0x710 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1384 [inline]
 netlink_alloc_large_skb+0x69/0x150 net/netlink/af_netlink.c:1185
 netlink_sendmsg+0x680/0xda0 net/netlink/af_netlink.c:1875
 sock_sendmsg_nosec net/socket.c:775 [inline]
 __sock_sendmsg net/socket.c:790 [inline]
 ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738
 __sys_sendmsg+0x160/0x210 net/socket.c:2770
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88811dc4bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811dc4c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811dc4c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88811dc4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811dc4c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================