Extracting prog: 2m8.492571517s
Minimizing prog: 8m33.146414039s
Simplifying prog options: 0s
Extracting C: 34.400505574s
Simplifying C: 9m28.629997744s


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: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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40186f40, 0x20000502)
r1 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r1, 0x40046f41, 0x20000502)

program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=58.652825958s, {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}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl
detailed listing:
executing program 0:
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40186f40, 0x20000502)
openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)

program did not crash
testing program (duration=58.652825958s, {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}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40186f40, 0x20000502)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(0xffffffffffffffff, 0x40046f41, 0x20000502)

program did not crash
testing program (duration=58.652825958s, {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}}): openat$ubi_ctrl-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40046f41, 0x20000502)

program did not crash
testing program (duration=58.652825958s, {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}}): ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
ioctl$F2FS_IOC_START_VOLATILE_WRITE(0xffffffffffffffff, 0x40186f40, 0x20000502)
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40046f41, 0x20000502)

program did not crash
testing program (duration=58.652825958s, {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}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
r0 = openat$ubi_ctrl(0xffffffffffffff9c, 0x0, 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40186f40, 0x20000502)
r1 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r1, 0x40046f41, 0x20000502)

program did not crash
testing program (duration=58.652825958s, {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}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
detailed listing:
executing program 0:
r0 = openat$ubi_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r0, 0x40186f40, 0x20000502)
r1 = openat$ubi_ctrl(0xffffffffffffff9c, 0x0, 0x0, 0x0)
ioctl$F2FS_IOC_START_VOLATILE_WRITE(r1, 0x40046f41, 0x20000502)

program did not crash
extracting C reproducer
testing compiled C program (duration=58.652825958s, {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}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
simplifying C reproducer
testing compiled C program (duration=58.652825958s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program did not crash
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true 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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true 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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true 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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true 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$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
testing compiled C program (duration=58.652825958s, {Threaded:false Repeat:true 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE-openat$ubi_ctrl-ioctl$F2FS_IOC_START_VOLATILE_WRITE
program crashed: KASAN: slab-use-after-free Read in notifier_chain_register
reproducing took 20m44.669520564s
repro crashed as (corrupted=false):
ubi0: attaching mtd0
ubi0: scanning is finished
==================================================================
BUG: KASAN: slab-use-after-free in notifier_chain_register+0x141/0x3f0 kernel/notifier.c:27
Read of size 4 at addr ffff888032fdd8d8 by task syz-executor205/5816

CPU: 1 UID: 0 PID: 5816 Comm: syz-executor205 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 notifier_chain_register+0x141/0x3f0 kernel/notifier.c:27
 __blocking_notifier_chain_register kernel/notifier.c:264 [inline]
 blocking_notifier_chain_register+0x61/0xc0 kernel/notifier.c:282
 ubi_wl_init+0x3396/0x3720 drivers/mtd/ubi/wl.c:1960
 ubi_attach+0x3e01/0x5b80 drivers/mtd/ubi/attach.c:1605
 ubi_attach_mtd_dev+0x1a3a/0x3540 drivers/mtd/ubi/build.c:1004
 ctrl_cdev_ioctl+0x346/0x570 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb73d274a79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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:00007fffe4059368 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb73d274a79
RDX: 0000000020000502 RSI: 0000000040186f40 RDI: 0000000000000003
RBP: 000000000000e16b R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe405937c
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 5813:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4314
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 ubi_attach_mtd_dev+0x552/0x3540 drivers/mtd/ubi/build.c:933
 ctrl_cdev_ioctl+0x346/0x570 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5813:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2338 [inline]
 slab_free mm/slub.c:4598 [inline]
 kfree+0x196/0x430 mm/slub.c:4746
 device_release+0x99/0x1c0
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 ubi_detach_mtd_dev+0x347/0x480 drivers/mtd/ubi/build.c:1156
 ctrl_cdev_ioctl+0x231/0x570 drivers/mtd/ubi/cdev.c:1069
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888032fdc000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 6360 bytes inside of
 freed 8192-byte region [ffff888032fdc000, ffff888032fde000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32fd8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000
head: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000cbf601 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5700, tgid 5700 (sshd), ts 48839868835, free_ts 48800569692
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 alloc_slab_page+0x6a/0x110 mm/slub.c:2408
 allocate_slab+0x5a/0x2b0 mm/slub.c:2574
 new_slab mm/slub.c:2627 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815
 __slab_alloc+0x58/0xa0 mm/slub.c:3905
 __slab_alloc_node mm/slub.c:3980 [inline]
 slab_alloc_node mm/slub.c:4141 [inline]
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_node_track_caller_noprof+0x2e9/0x4c0 mm/slub.c:4302
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609
 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
 alloc_skb include/linux/skbuff.h:1323 [inline]
 netlink_dump+0x1ee/0xe10 net/netlink/af_netlink.c:2283
 netlink_recvmsg+0x6bb/0x11d0 net/netlink/af_netlink.c:1973
 sock_recvmsg_nosec net/socket.c:1033 [inline]
 sock_recvmsg+0x22f/0x280 net/socket.c:1055
 ____sys_recvmsg+0x1c6/0x480 net/socket.c:2803
 ___sys_recvmsg net/socket.c:2845 [inline]
 __sys_recvmsg+0x291/0x390 net/socket.c:2878
page last free pid 5669 tgid 5669 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xd2c/0x1000 mm/page_alloc.c:2657
 discard_slab mm/slub.c:2673 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3142
 put_cpu_partial+0x17c/0x250 mm/slub.c:3217
 __slab_free+0x290/0x380 mm/slub.c:4468
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4104 [inline]
 slab_alloc_node mm/slub.c:4153 [inline]
 kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4205
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
 alloc_skb_fclone include/linux/skbuff.h:1373 [inline]
 tcp_stream_alloc_skb+0x3d/0x310 net/ipv4/tcp.c:886
 tcp_sendmsg_locked+0xd96/0x4f30 net/ipv4/tcp.c:1168
 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1358
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:726
 sock_write_iter+0x2d7/0x3f0 net/socket.c:1147
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaeb/0xd30 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731

Memory state around the buggy address:
 ffff888032fdd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032fdd800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888032fdd880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff888032fdd900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032fdd980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
ubi0: attaching mtd0
ubi0: scanning is finished
==================================================================
BUG: KASAN: slab-use-after-free in notifier_chain_register+0x141/0x3f0 kernel/notifier.c:27
Read of size 4 at addr ffff888032fdd8d8 by task syz-executor205/5816

CPU: 1 UID: 0 PID: 5816 Comm: syz-executor205 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 notifier_chain_register+0x141/0x3f0 kernel/notifier.c:27
 __blocking_notifier_chain_register kernel/notifier.c:264 [inline]
 blocking_notifier_chain_register+0x61/0xc0 kernel/notifier.c:282
 ubi_wl_init+0x3396/0x3720 drivers/mtd/ubi/wl.c:1960
 ubi_attach+0x3e01/0x5b80 drivers/mtd/ubi/attach.c:1605
 ubi_attach_mtd_dev+0x1a3a/0x3540 drivers/mtd/ubi/build.c:1004
 ctrl_cdev_ioctl+0x346/0x570 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb73d274a79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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:00007fffe4059368 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb73d274a79
RDX: 0000000020000502 RSI: 0000000040186f40 RDI: 0000000000000003
RBP: 000000000000e16b R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe405937c
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 5813:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4314
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 ubi_attach_mtd_dev+0x552/0x3540 drivers/mtd/ubi/build.c:933
 ctrl_cdev_ioctl+0x346/0x570 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5813:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2338 [inline]
 slab_free mm/slub.c:4598 [inline]
 kfree+0x196/0x430 mm/slub.c:4746
 device_release+0x99/0x1c0
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 ubi_detach_mtd_dev+0x347/0x480 drivers/mtd/ubi/build.c:1156
 ctrl_cdev_ioctl+0x231/0x570 drivers/mtd/ubi/cdev.c:1069
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888032fdc000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 6360 bytes inside of
 freed 8192-byte region [ffff888032fdc000, ffff888032fde000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32fd8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000
head: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000cbf601 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5700, tgid 5700 (sshd), ts 48839868835, free_ts 48800569692
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 alloc_slab_page+0x6a/0x110 mm/slub.c:2408
 allocate_slab+0x5a/0x2b0 mm/slub.c:2574
 new_slab mm/slub.c:2627 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815
 __slab_alloc+0x58/0xa0 mm/slub.c:3905
 __slab_alloc_node mm/slub.c:3980 [inline]
 slab_alloc_node mm/slub.c:4141 [inline]
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_node_track_caller_noprof+0x2e9/0x4c0 mm/slub.c:4302
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609
 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
 alloc_skb include/linux/skbuff.h:1323 [inline]
 netlink_dump+0x1ee/0xe10 net/netlink/af_netlink.c:2283
 netlink_recvmsg+0x6bb/0x11d0 net/netlink/af_netlink.c:1973
 sock_recvmsg_nosec net/socket.c:1033 [inline]
 sock_recvmsg+0x22f/0x280 net/socket.c:1055
 ____sys_recvmsg+0x1c6/0x480 net/socket.c:2803
 ___sys_recvmsg net/socket.c:2845 [inline]
 __sys_recvmsg+0x291/0x390 net/socket.c:2878
page last free pid 5669 tgid 5669 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xd2c/0x1000 mm/page_alloc.c:2657
 discard_slab mm/slub.c:2673 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3142
 put_cpu_partial+0x17c/0x250 mm/slub.c:3217
 __slab_free+0x290/0x380 mm/slub.c:4468
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4104 [inline]
 slab_alloc_node mm/slub.c:4153 [inline]
 kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4205
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
 alloc_skb_fclone include/linux/skbuff.h:1373 [inline]
 tcp_stream_alloc_skb+0x3d/0x310 net/ipv4/tcp.c:886
 tcp_sendmsg_locked+0xd96/0x4f30 net/ipv4/tcp.c:1168
 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1358
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:726
 sock_write_iter+0x2d7/0x3f0 net/socket.c:1147
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaeb/0xd30 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731

Memory state around the buggy address:
 ffff888032fdd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032fdd800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888032fdd880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff888032fdd900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032fdd980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================