Extracting prog: 3m50.099568591s
Minimizing prog: 1h7m28.554873215s
Simplifying prog options: 0s
Extracting C: 35.420614582s
Simplifying C: 26m23.004815226s


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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
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: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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program crashed: WARNING in bfs_get_block
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r0, &(0x7f0000000140)='2', 0xfdef, 0xe7c)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
pwrite64(0xffffffffffffffff, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r0, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(0xffffffffffffffff, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, 0x0, 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, 0x0, 0x0, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140), 0x0, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, 0x0, 0x0, 0x2)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0), 0x0, 0x2)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: WARNING in bfs_get_block
simplifying C reproducer
testing compiled C program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: WARNING in bfs_get_block
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: WARNING in bfs_get_block
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
program crashed: WARNING in bfs_get_block
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program crashed: WARNING in bfs_get_block
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program crashed: WARNING in bfs_get_block
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat$cgroup_ro-openat-pwrite64-pwrite64
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000040), &(0x7f0000000240)='./bus\x00', 0x98, &(0x7f00000004c0)=ANY=[], 0xff, 0xa4, &(0x7f0000000180)="$eJzs0b+pAkEQB+C5e/C4A9EC7OFq0CKswBKMBEEsyFYswdTIwNTkZHFFuGDBQFH4Ptg/P4ZdBuZw3U9jHNFvI/q/eOiT1XoXJf/FKr+gzmeThj655/M8YhYRVaqn7bJZHvMaPF80xd9Hb+sbAAB4XTXIdXTdM53afGk/2RMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAN7kFAAD//z7jFwY=")
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.current\x00', 0x275a, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x101041, 0x15)
pwrite64(r1, &(0x7f0000000140)='2', 0xfdef, 0xe7c)
pwrite64(r0, &(0x7f00000002c0)="fbcc", 0x2, 0x2)

program crashed: WARNING in bfs_get_block
validation run: crashed=true
reproducing took 1h43m0.121064453s
repro crashed as (corrupted=false):
loop2: detected capacity change from 0 to 64
BFS-fs: bfs_fill_super(): loop2 is unclean, continuing
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087, CPU#1: syz.2.23/6042
Modules linked in:
CPU: 1 UID: 0 PID: 6042 Comm: syz.2.23 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087
Code: 4c 89 f7 e8 89 0c df ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 04 63 fb ff e8 ff 02 78 ff eb 8c e8 f8 02 78 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 ea 02 78 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc900042b7608 EFLAGS: 00010293
RAX: ffffffff824c65c8 RBX: ffff888045081818 RCX: ffff88802f3f8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802b5ba001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008a10304 R12: ffff888054f91600
R13: ffff88806043a128 R14: ffff888045081818 R15: 000000000000000a
FS:  00007f35604b66c0(0000) GS:ffff88812627d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd93a3344e8 CR3: 0000000033c12000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x5e6/0xaf0 fs/bfs/file.c:126
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2042
 block_write_begin+0x8d/0x120 fs/buffer.c:2153
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:180
 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4325
 generic_file_write_iter+0x14b/0x690 mm/filemap.c:4468
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:800
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3560e5cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f35604b6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f35610d5fa0 RCX: 00007f3560e5cdd9
RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f3560ef2d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f35610d6038 R14: 00007f35610d5fa0 R15: 00007ffd73acbe08
 </TASK>

final repro crashed as (corrupted=false):
loop2: detected capacity change from 0 to 64
BFS-fs: bfs_fill_super(): loop2 is unclean, continuing
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087, CPU#1: syz.2.23/6042
Modules linked in:
CPU: 1 UID: 0 PID: 6042 Comm: syz.2.23 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087
Code: 4c 89 f7 e8 89 0c df ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 04 63 fb ff e8 ff 02 78 ff eb 8c e8 f8 02 78 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 ea 02 78 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc900042b7608 EFLAGS: 00010293
RAX: ffffffff824c65c8 RBX: ffff888045081818 RCX: ffff88802f3f8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802b5ba001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008a10304 R12: ffff888054f91600
R13: ffff88806043a128 R14: ffff888045081818 R15: 000000000000000a
FS:  00007f35604b66c0(0000) GS:ffff88812627d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd93a3344e8 CR3: 0000000033c12000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x5e6/0xaf0 fs/bfs/file.c:126
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2042
 block_write_begin+0x8d/0x120 fs/buffer.c:2153
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:180
 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4325
 generic_file_write_iter+0x14b/0x690 mm/filemap.c:4468
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:800
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3560e5cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f35604b6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f35610d5fa0 RCX: 00007f3560e5cdd9
RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f3560ef2d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f35610d6038 R14: 00007f35610d5fa0 R15: 00007ffd73acbe08
 </TASK>