Extracting prog: 1m9.072036715s
Minimizing prog: 4m23.044019642s
Simplifying prog options: 0s
Extracting C: 1m6.173136018s
Simplifying C: 6m20.329813649s


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: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_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program crashed: kernel BUG in may_delete
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): mount$incfs
detailed listing:
executing program 0:
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$eJzs289vFFUcAPDvTH8gP1sRf4CoVWJs/NHSgsrBi0YTDxhN9IDHui2EUKihNRFCpBqDFxNDomfj0cS/wJsXo55MvOrdkBDtBfRUM7MzZTvuthS23cJ+Psm27+28nfe+O/Nm3sybDaBrDWV/kogdEfF7RAzUs8sLDNX/XV+4UPtn4UIticXFt/9K8nLXFi7UyqLl57YXmeE0Iv00KSpZbvbc+VMT09NTZ4v86Nzp90dnz51/7uTpiRNTJ6bOjB85cvjQ2IsvjD/fljizuK7t+2hm/97X3738Ru3Y5fd+/i5r745i+bWFvlpbKmowlAX+92KuuuzJdlfWYTsb0klvBxvCmvRERLa5+vL+PxA9cWPjDcRrn3S0ccC6ys5NW1ovnl8E7mJJdLoFQGeUJ/rsOr58bdDQY1O4+nL9AiiL+3rxqi/pjbQo01e5vm2noYg4Nv/v19krKvdTAADWw+e1r47Gs83Gf2k80FBuVzGHMhgR90bE7oi4LyL2RMT9EXnZByPioTXWX50a+v/4J71yS4HdpGz891Ixt7V8/FeO/mKwp8jtzOPvS46fnJ46WHwnw9G3JcuPrVDHD6/+9kWrZY3jv+yV1V+OBYt2XOmt3KCbnJibyAelbXD144h9vc3iT5ZmApKI2BsR+9a26l1l4uTT3+5vVWj1+FfQhnmmxW8inqpv//moxF9KVp6fHL0npqcOjpZ7RYPB+r9ffr30Vqv6byv+Nsi2/7bl+3+1yGDSOF87u/o600r+0h+ftbymudX9vz95Jz8e9RfvfTgxN3d2LKI/OZrnl70/fuOzZb4sn8U/fKB5/99dfCaL/+GIyHbiRyLi0Yh4rGj74xHxREQcWOH7+OmV1ss2w/afbHr8W9r/K9t/7YmeUz9+36r+pfh7Y4XtfzhPDRfv5Me/VdxsA2/nuwMAAIA7RZo/A5+kI0vpNB0ZqT/Dvye2pdMzs3PPHJ/54Mxk/Vn5wehLyztdAw33Q8eS+WKN9fx4cfurXH6ouG/8Zc/WPD9Sm5me7HDs0O22t+j/mT97Ot06YN01m0cb7+9AQ4ANV+3/lQnci29uZGOADeX32tC9Vun/1ee5gLuI8z90r2b9/2Ilby4A7k7O/9C99H/oXvo/dC/9H7rS7fyu/45MlMe6zdKeOzYR6aZoRtcntsb6rLnDByYAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIA2+S8AAP//SMHotQ==")
mount$incfs(0x0, &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', 0x0, &(0x7f0000000280), 0x404, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', 0x0, 0x404, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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_mount_image$ext4-mount$incfs
program did not crash
testing compiled C program (duration=30s, {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: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_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
program did not crash
testing compiled C program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
testing compiled C program (duration=30s, {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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
program crashed: kernel BUG in may_delete
testing program (duration=30s, {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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program crashed: kernel BUG in may_delete
validation run: crashed=true
testing program (duration=30s, {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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program crashed: kernel BUG in may_delete
validation run: crashed=true
testing program (duration=30s, {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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000300)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x2800700, &(0x7f0000000d40)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@grpjquota}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x8000000}}, {@resuid={'resuid', 0x3d, 0xee01}}, {@data_err_ignore}, {@jqfmt_vfsold}, {@acl}, {@barrier_val={'barrier', 0x3d, 0x7}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)

program crashed: kernel BUG in may_delete
validation run: crashed=true
reproducing took 15m49.450513226s
repro crashed as (corrupted=false):
EXT4-fs error (device loop2): htree_dirblock_to_tree:1112: inode #2: block 13: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=76, inode=0, rec_len=0, size=1024 fake=0
------------[ cut here ]------------
kernel BUG at fs/namei.c:2941!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 366 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:may_delete+0x727/0x730 fs/namei.c:2941
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 82 fe ff ff 48 89 df e8 4a 28 f5 ff e9 75 fe ff ff e8 c0 a7 b5 ff 0f 0b e8 b9 a7 b5 ff <0f> 0b 0f 1f 80 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 a1 a7
RSP: 0018:ffffc90000a47cc8 EFLAGS: 00010293
RAX: ffffffff81b433a7 RBX: ffff88810d035ee0 RCX: ffff88810cbebc00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000a47d20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000148f78 R12: 1ffff11021a06bdc
R13: 0000000000000001 R14: ffff88810d035690 R15: dffffc0000000000
FS:  000055558cee0500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558cf03948 CR3: 000000010dc66000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_rmdir+0x2f/0x450 fs/namei.c:4138
 incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1991
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x44f/0x500 fs/namespace.c:1149
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1156
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:184
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbc776ed417
Code: a2 c7 05 dc 62 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcf5d01f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fbc776ed417
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf5d02040
RBP: 00007ffcf5d02040 R08: 00007ffcf5d03040 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf5d03130
R13: 00007fbc77782ccb R14: 00000000000089e8 R15: 00007ffcf5d04200
 </TASK>
Modules linked in:
---[ end trace 598468bc8df1ff0a ]---
RIP: 0010:may_delete+0x727/0x730 fs/namei.c:2941
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 82 fe ff ff 48 89 df e8 4a 28 f5 ff e9 75 fe ff ff e8 c0 a7 b5 ff 0f 0b e8 b9 a7 b5 ff <0f> 0b 0f 1f 80 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 a1 a7
RSP: 0018:ffffc90000a47cc8 EFLAGS: 00010293
RAX: ffffffff81b433a7 RBX: ffff88810d035ee0 RCX: ffff88810cbebc00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000a47d20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000148f78 R12: 1ffff11021a06bdc
R13: 0000000000000001 R14: ffff88810d035690 R15: dffffc0000000000
FS:  000055558cee0500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558cf03948 CR3: 000000010dc66000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

final repro crashed as (corrupted=false):
EXT4-fs error (device loop2): htree_dirblock_to_tree:1112: inode #2: block 13: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=76, inode=0, rec_len=0, size=1024 fake=0
------------[ cut here ]------------
kernel BUG at fs/namei.c:2941!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 366 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:may_delete+0x727/0x730 fs/namei.c:2941
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 82 fe ff ff 48 89 df e8 4a 28 f5 ff e9 75 fe ff ff e8 c0 a7 b5 ff 0f 0b e8 b9 a7 b5 ff <0f> 0b 0f 1f 80 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 a1 a7
RSP: 0018:ffffc90000a47cc8 EFLAGS: 00010293
RAX: ffffffff81b433a7 RBX: ffff88810d035ee0 RCX: ffff88810cbebc00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000a47d20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000148f78 R12: 1ffff11021a06bdc
R13: 0000000000000001 R14: ffff88810d035690 R15: dffffc0000000000
FS:  000055558cee0500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558cf03948 CR3: 000000010dc66000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_rmdir+0x2f/0x450 fs/namei.c:4138
 incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1991
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x44f/0x500 fs/namespace.c:1149
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1156
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:184
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbc776ed417
Code: a2 c7 05 dc 62 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcf5d01f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fbc776ed417
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf5d02040
RBP: 00007ffcf5d02040 R08: 00007ffcf5d03040 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf5d03130
R13: 00007fbc77782ccb R14: 00000000000089e8 R15: 00007ffcf5d04200
 </TASK>
Modules linked in:
---[ end trace 598468bc8df1ff0a ]---
RIP: 0010:may_delete+0x727/0x730 fs/namei.c:2941
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 82 fe ff ff 48 89 df e8 4a 28 f5 ff e9 75 fe ff ff e8 c0 a7 b5 ff 0f 0b e8 b9 a7 b5 ff <0f> 0b 0f 1f 80 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 a1 a7
RSP: 0018:ffffc90000a47cc8 EFLAGS: 00010293
RAX: ffffffff81b433a7 RBX: ffff88810d035ee0 RCX: ffff88810cbebc00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000a47d20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000148f78 R12: 1ffff11021a06bdc
R13: 0000000000000001 R14: ffff88810d035690 R15: dffffc0000000000
FS:  000055558cee0500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558cf03948 CR3: 000000010dc66000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400