Extracting prog: 1m19.368964637s
Minimizing prog: 15m18.138133086s
Simplifying prog options: 0s
Extracting C: 34.554247297s
Simplifying C: 6m51.804693221s


extracting reproducer from 68 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: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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program crashed: possible deadlock in __configfs_open_file
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(0xffffffffffffffff, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, 0x0, 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, 0x0, 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000)="8e79ead6525bbb6605dfe52d1043dc724a8c", 0xfdef)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, 0x0, 0x0)

program did not crash
testing program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
detailed listing:
executing program 0:
openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/config/nullb/features\x00', 0x40283, 0x0)
r0 = openat$auto_configfs_file_operations_configfs_internal(0xffffffffffffff9c, &(0x7f0000006900)='/sys/kernel/config/target/dbroot\x00', 0x189002, 0x0)
mprotect$auto(0x1ffff000, 0x8000000000000001, 0xd)
write$auto_configfs_file_operations_configfs_internal(r0, &(0x7f0000000000), 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
simplifying C reproducer
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
testing compiled C program (duration=49.604571592s, {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$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program did not crash
testing compiled C program (duration=49.604571592s, {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:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_configfs_file_operations_configfs_internal-openat$auto_configfs_file_operations_configfs_internal-mprotect$auto-write$auto_configfs_file_operations_configfs_internal
program crashed: possible deadlock in __configfs_open_file
reproducing took 24m3.866053941s
repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0 Not tainted
--------------------------------------------
syz-executor134/5824 is trying to acquire lock:
ffff888025bfa478 (&p->frag_sem){.+.+}-{4:4}, at: __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304

but task is already holding lock:
ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&p->frag_sem);
  lock(&p->frag_sem);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor134/5824:
 #0: ffff88801cf64420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888027e77688 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x75/0x4b0 fs/configfs/file.c:226
 #2: ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
 #2: ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229
 #3: ffffffff8ee08648 (target_devices_lock){+.+.}-{4:4}, at: target_core_item_dbroot_store+0x23/0x2e0 drivers/target/target_core_configfs.c:114

stack backtrace:
CPU: 1 UID: 0 PID: 5824 Comm: syz-executor134 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain kernel/locking/lockdep.c:3891 [inline]
 __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524
 __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304
 do_dentry_open+0xf59/0x1ea0 fs/open.c:945
 vfs_open+0x82/0x3f0 fs/open.c:1075
 do_open fs/namei.c:3828 [inline]
 path_openat+0x1e6a/0x2d60 fs/namei.c:3987
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 file_open_name+0x2a4/0x450 fs/open.c:1347
 filp_open+0x4b/0x80 fs/open.c:1367
 target_core_item_dbroot_store+0x10d/0x2e0 drivers/target/target_core_configfs.c:134
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x2f6/0x4b0 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 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: 0033:0x7f187f84a9e9
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:00007fffa4549828 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fffa4549830 RCX: 00007f187f84a9e9
RDX: 000000000000fdef RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007ff

final repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0 Not tainted
--------------------------------------------
syz-executor134/5824 is trying to acquire lock:
ffff888025bfa478 (&p->frag_sem){.+.+}-{4:4}, at: __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304

but task is already holding lock:
ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&p->frag_sem);
  lock(&p->frag_sem);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor134/5824:
 #0: ffff88801cf64420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888027e77688 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x75/0x4b0 fs/configfs/file.c:226
 #2: ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
 #2: ffff888141f09178 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229
 #3: ffffffff8ee08648 (target_devices_lock){+.+.}-{4:4}, at: target_core_item_dbroot_store+0x23/0x2e0 drivers/target/target_core_configfs.c:114

stack backtrace:
CPU: 1 UID: 0 PID: 5824 Comm: syz-executor134 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain kernel/locking/lockdep.c:3891 [inline]
 __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524
 __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304
 do_dentry_open+0xf59/0x1ea0 fs/open.c:945
 vfs_open+0x82/0x3f0 fs/open.c:1075
 do_open fs/namei.c:3828 [inline]
 path_openat+0x1e6a/0x2d60 fs/namei.c:3987
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 file_open_name+0x2a4/0x450 fs/open.c:1347
 filp_open+0x4b/0x80 fs/open.c:1367
 target_core_item_dbroot_store+0x10d/0x2e0 drivers/target/target_core_configfs.c:134
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x2f6/0x4b0 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 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: 0033:0x7f187f84a9e9
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:00007fffa4549828 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fffa4549830 RCX: 00007f187f84a9e9
RDX: 000000000000fdef RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007ff