Extracting prog: 2m31.879634775s
Minimizing prog: 4m23.014090605s
Simplifying prog options: 5m10.835268214s
Extracting C: 1m15.504564372s
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:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB="9f01000083667d1040206502d14e0102030109021b000100000000090400000190f19c000905f3ede8e9384088477da5163aeacac5aef6b35899848f884763144ec6a2aeada635e54cdc8fb569daf4797849ac735823c41a718ab016b0c1ec7613250780", @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program crashed: BUG: corrupted list in em28xx_close_extension
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=54.40253341s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, 0x0, 0x0)

program did not crash
testing program (duration=54.40253341s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[], 0x0)

program did not crash
testing program (duration=54.40253341s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB, @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=54.40253341s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
program crashed: BUG: corrupted list in em28xx_init_extension
a never seen crash title: BUG: corrupted list in em28xx_init_extension, ignore
simplifying guilty program options
testing program (duration=54.40253341s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB="9f01000083667d1040206502d14e0102030109021b000100000000090400000190f19c000905f3ede8e9384088477da5163aeacac5aef6b35899848f884763144ec6a2aeada635e54cdc8fb569daf4797849ac735823c41a718ab016b0c1ec7613250780", @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program crashed: BUG: corrupted list in em28xx_init_extension
a never seen crash title: BUG: corrupted list in em28xx_init_extension, ignore
testing program (duration=54.40253341s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB="9f01000083667d1040206502d14e0102030109021b000100000000090400000190f19c000905f3ede8e9384088477da5163aeacac5aef6b35899848f884763144ec6a2aeada635e54cdc8fb569daf4797849ac735823c41a718ab016b0c1ec7613250780", @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program did not crash
testing program (duration=54.40253341s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB="9f01000083667d1040206502d14e0102030109021b000100000000090400000190f19c000905f3ede8e9384088477da5163aeacac5aef6b35899848f884763144ec6a2aeada635e54cdc8fb569daf4797849ac735823c41a718ab016b0c1ec7613250780", @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program crashed: BUG: corrupted list in em28xx_init_extension
a never seen crash title: BUG: corrupted list in em28xx_init_extension, ignore
testing program (duration=54.40253341s, {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}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x5, 0x2d, &(0x7f00000005c0)=ANY=[@ANYBLOB="9f01000083667d1040206502d14e0102030109021b000100000000090400000190f19c000905f3ede8e9384088477da5163aeacac5aef6b35899848f884763144ec6a2aeada635e54cdc8fb569daf4797849ac735823c41a718ab016b0c1ec7613250780", @ANYRESHEX=0x0, @ANYRESDEC=0x0, @ANYRESHEX, @ANYRES32, @ANYRES8=0x0], 0x0)

program crashed: BUG: corrupted list in em28xx_init_extension
a never seen crash title: BUG: corrupted list in em28xx_init_extension, ignore
reproducing took 13m21.23357886s
repro crashed as (corrupted=false):
em28xx 6-1:0.0: Disconnecting em28xx #4
em28xx 6-1:0.0: Disconnecting em28xx
 non-slab/vmalloc memory
list_del corruption. prev->next should be ffff88805e370250, but was 0000000000000000. (prev=ffff88805cb98250)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 dc 4a 63 fd 49 8b 17 48 c7 c7 40 d8 c1 8b 48 89 de 4c 89 f9 e8 07 18 69 fc 90 <0f> 0b 4c 89 f7 e8 6c 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ad
RSP: 0018:ffffc900000e7440 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88805e370250 RCX: c82cfcf1b00f7e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88805e370000 R08: ffffc900000e7127 R09: 1ffff9200001ce24
R10: dffffc0000000000 R11: fffff5200001ce25 R12: 1ffff1100b97304a
R13: dffffc0000000000 R14: ffff88805d504250 R15: ffff88805cb98250
FS:  0000000000000000(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557d9a8233e0 CR3: 000000007e6f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 em28xx_close_extension+0x130/0x220 drivers/media/usb/em28xx/em28xx-core.c:1137
 em28xx_usb_disconnect+0x16b/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4197
 usb_unbind_interface+0x26b/0x8f0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4d6/0x7c0 drivers/base/dd.c:1295
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3881
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x910 drivers/usb/core/hub.c:2316
 hub_port_connect drivers/usb/core/hub.c:5371 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x1cdb/0x4a00 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 dc 4a 63 fd 49 8b 17 48 c7 c7 40 d8 c1 8b 48 89 de 4c 89 f9 e8 07 18 69 fc 90 <0f> 0b 4c 89 f7 e8 6c 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ad
RSP: 0018:ffffc900000e7440 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88805e370250 RCX: c82cfcf1b00f7e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88805e370000 R08: ffffc900000e7127 R09: 1ffff9200001ce24
R10: dffffc0000000000 R11: fffff5200001ce25 R12: 1ffff1100b97304a
R13: dffffc0000000000 R14: ffff88805d504250 R15: ffff88805cb98250
FS:  0000000000000000(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557d9a8233e0 CR3: 0000000032d66000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

final repro crashed as (corrupted=false):
em28xx 6-1:0.0: Disconnecting em28xx #4
em28xx 6-1:0.0: Disconnecting em28xx
 non-slab/vmalloc memory
list_del corruption. prev->next should be ffff88805e370250, but was 0000000000000000. (prev=ffff88805cb98250)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 dc 4a 63 fd 49 8b 17 48 c7 c7 40 d8 c1 8b 48 89 de 4c 89 f9 e8 07 18 69 fc 90 <0f> 0b 4c 89 f7 e8 6c 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ad
RSP: 0018:ffffc900000e7440 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88805e370250 RCX: c82cfcf1b00f7e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88805e370000 R08: ffffc900000e7127 R09: 1ffff9200001ce24
R10: dffffc0000000000 R11: fffff5200001ce25 R12: 1ffff1100b97304a
R13: dffffc0000000000 R14: ffff88805d504250 R15: ffff88805cb98250
FS:  0000000000000000(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557d9a8233e0 CR3: 000000007e6f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 em28xx_close_extension+0x130/0x220 drivers/media/usb/em28xx/em28xx-core.c:1137
 em28xx_usb_disconnect+0x16b/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4197
 usb_unbind_interface+0x26b/0x8f0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4d6/0x7c0 drivers/base/dd.c:1295
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3881
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x910 drivers/usb/core/hub.c:2316
 hub_port_connect drivers/usb/core/hub.c:5371 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x1cdb/0x4a00 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 dc 4a 63 fd 49 8b 17 48 c7 c7 40 d8 c1 8b 48 89 de 4c 89 f9 e8 07 18 69 fc 90 <0f> 0b 4c 89 f7 e8 6c 7a 43 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ad
RSP: 0018:ffffc900000e7440 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88805e370250 RCX: c82cfcf1b00f7e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88805e370000 R08: ffffc900000e7127 R09: 1ffff9200001ce24
R10: dffffc0000000000 R11: fffff5200001ce25 R12: 1ffff1100b97304a
R13: dffffc0000000000 R14: ffff88805d504250 R15: ffff88805cb98250
FS:  0000000000000000(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557d9a8233e0 CR3: 0000000032d66000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400