Extracting prog: 1m22.836904032s Minimizing prog: 14m51.873908457s Simplifying prog options: 0s Extracting C: 40.545710134s Simplifying C: 5m26.230671048s extracting reproducer from 32 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp-ioctl$TUNSETIFF-getsockopt$IPT_SO_GET_REVISION_MATCH-openat$sysfs-ioctl$KVM_TDX_INIT_VM-ioctl$DM_TABLE_LOAD detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'vlan1\x00', 0x1000}) getsockopt$IPT_SO_GET_REVISION_MATCH(r3, 0x0, 0x42, &(0x7f0000000100)={'icmp\x00'}, &(0x7f0000000680)=0x1e) r4 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/power/wake_lock', 0x202000, 0x91) ioctl$KVM_TDX_INIT_VM(r4, 0xc008aeba, &(0x7f0000000640)={0x1, 0x0, &(0x7f0000000340)={0x20000000, 0x4000, [0x3, 0x1, 0xffff, 0x9, 0x5, 0xfffffffffffffff9], [0xb07, 0xfffffffffffffffa, 0x1, 0xa94, 0x9, 0x9], [0x8, 0x74af, 0x1, 0x2, 0x0, 0x40], '\x00', {0x4, 0x0, [{0x80000001, 0xf2, 0x1, 0x0, 0x7f, 0x6, 0x6}, {0x80000000, 0x2, 0x0, 0x401, 0x9, 0x9, 0x8a}, {0x80000008, 0x4, 0x6, 0x800, 0x1, 0x8, 0x3a}, {0xc0000000, 0xe, 0x2, 0x799, 0x1, 0x7, 0x4}]}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000001980)={0x4, 0x0, 0x0, 0x168, 0x138, 0x1, 0x0, 0xda01, 0x0, 0x0, @by_name={0x0, {'syz', 0x0, '0\x00'}}, [@error={0x0, 0x2890, 0x0, 0x30}]}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks single: successfully extracted reproducer found reproducer with 14 syscalls minimizing guilty program 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp-ioctl$TUNSETIFF-getsockopt$IPT_SO_GET_REVISION_MATCH-openat$sysfs-ioctl$KVM_TDX_INIT_VM detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'vlan1\x00', 0x1000}) getsockopt$IPT_SO_GET_REVISION_MATCH(r3, 0x0, 0x42, &(0x7f0000000100)={'icmp\x00'}, &(0x7f0000000680)=0x1e) r4 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/power/wake_lock', 0x202000, 0x91) ioctl$KVM_TDX_INIT_VM(r4, 0xc008aeba, &(0x7f0000000640)={0x1, 0x0, &(0x7f0000000340)={0x20000000, 0x4000, [0x3, 0x1, 0xffff, 0x9, 0x5, 0xfffffffffffffff9], [0xb07, 0xfffffffffffffffa, 0x1, 0xa94, 0x9, 0x9], [0x8, 0x74af, 0x1, 0x2, 0x0, 0x40], '\x00', {0x4, 0x0, [{0x80000001, 0xf2, 0x1, 0x0, 0x7f, 0x6, 0x6}, {0x80000000, 0x2, 0x0, 0x401, 0x9, 0x9, 0x8a}, {0x80000008, 0x4, 0x6, 0x800, 0x1, 0x8, 0x3a}, {0xc0000000, 0xe, 0x2, 0x799, 0x1, 0x7, 0x4}]}}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp-ioctl$TUNSETIFF-getsockopt$IPT_SO_GET_REVISION_MATCH-openat$sysfs detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'vlan1\x00', 0x1000}) getsockopt$IPT_SO_GET_REVISION_MATCH(r3, 0x0, 0x42, &(0x7f0000000100)={'icmp\x00'}, &(0x7f0000000680)=0x1e) openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/power/wake_lock', 0x202000, 0x91) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp-ioctl$TUNSETIFF-getsockopt$IPT_SO_GET_REVISION_MATCH detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r3 = socket$inet_udp(0x2, 0x2, 0x0) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'vlan1\x00', 0x1000}) getsockopt$IPT_SO_GET_REVISION_MATCH(r3, 0x0, 0x42, &(0x7f0000000100)={'icmp\x00'}, &(0x7f0000000680)=0x1e) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp-ioctl$TUNSETIFF detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) socket$inet_udp(0x2, 0x2, 0x0) ioctl$TUNSETIFF(0xffffffffffffffff, 0x400454ca, &(0x7f0000000080)={'vlan1\x00', 0x1000}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING-socket$inet_udp detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime-mmap$IORING_OFF_SQ_RING detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND-timer_settime detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)=0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) timer_settime(r2, 0x0, &(0x7f00000000c0)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-timer_create detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @thr={&(0x7f0000000880)="4138e8bc86cdd6d104efb80167365b67299ea043effbe52eacda357038591a223821f77d63f9a60549d806b10f4ae7cf05ebdd8ff89ce10ffa5fcdaacfba1bf7d8bbb7b99465cd2ca28e09f5baa2ad355e5c145bfa1480c811b4d419c9c01764da164826383025af549ecdbb4a9912c4801d1a3177463cdebf7ed748a5d563e0ed68053f0637b93fc8f8eaf7394fd60d8f487fd1c74ce3eaea810c2cebe0a6d91b8dbd9b90a97adf085abdc4fc81bfd4a5b7ec0bb34a56cefb7986adb487bf0c69936645b7a49d11a6bab0dcd0ed88b25ecf3ab51518e23396ccf78015cdca78901fa002bb279d9de91f29f610ce63551c7488dfe64ffce326", &(0x7f00000007c0)="8685ced2a8569137929290605abf62ca9e6f3751e6143d8a8b756cc02cb6d06194fbb426dad38cfdbcc250b7558acb40a4ac62404f65e77e29a4faaf9950e3de27fa67f812880eb64dd1f982922aa057785c72745dd2b5ae31a7bad100"/108}}, &(0x7f0000000840)) program did not crash 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-gettid-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) gettid() ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program did not crash 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: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}}): openat$dm_control-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev}) program did not crash 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: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}}): ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: ioctl$DM_DEV_CREATE(0xffffffffffffffff, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(0xffffffffffffffff, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r0}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(0xffffffffffffffff, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r0}}) program did not crash 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, 0x0, 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program did not crash 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, 0x0) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev}) program did not crash 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, 0x0) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program did not crash 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, 0x0) program did not crash extracting C reproducer testing compiled C 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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks simplifying C reproducer testing compiled C program (duration=30s, {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: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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks 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}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks testing compiled C program (duration=30s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks testing compiled C program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks testing program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks validation run: crashed=true testing program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks validation run: crashed=true testing program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$dm_control-ioctl$DM_DEV_CREATE-ioctl$DM_TABLE_LOAD-ioctl$DM_DEV_SUSPEND detailed listing: executing program 0: r0 = openat$dm_control(0xffffffffffffff9c, &(0x7f0000000140), 0x40002, 0x0) ioctl$DM_DEV_CREATE(r0, 0xc138fd03, &(0x7f0000000500)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x88001, 0x0, 0x0, {0x0, {'syz', 0x0, '0\x00'}}}) ioctl$DM_TABLE_LOAD(r0, 0xc138fd09, &(0x7f0000000180)={0x4, 0x0, 0x0, 0x188, 0x138, 0x1, 0x0, 0x0, 0x0, 0x0, @by_dev={r1}, [@snapshot={0x0, 0x1008, 0x0, 0x50, 'snapshot-merge\x00', {@ram={'/dev/ram', 0x1}, 0x20, @ram_num={'1:', 0x0}, 0x20, 'n', 0x20, '32'}}]}) ioctl$DM_DEV_SUSPEND(r0, 0xc138fd06, &(0x7f0000000980)={0x4, 0x0, 0x0, 0x138, 0x138, 0x0, 0x0, 0x9200, 0x0, 0x0, @by_dev={r1}}) program crashed: BUG: unable to handle kernel paging request in snapshot_merge_next_chunks validation run: crashed=true reproducing took 24m27.708430679s repro crashed as (corrupted=false): BUG: unable to handle page fault for address: fffffffffffffff1 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 7cae067 P4D 7cae067 PUD 7cb0067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 04b5f10b80d13b0533bf6aaa302b886c75cf6d37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057 Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 62 7d df fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba 5a 5f 88 2d <45> 03 53 f1 74 02 0f 0b 2e e8 82 e3 fd 1b 89 c3 bf 01 00 00 00 89 RSP: 0018:ffffc90000e9f8a0 EFLAGS: 00010246 RAX: 1ffffffff1062c8f RBX: ffffffff88316478 RCX: dffffc0000000000 RDX: ffffc90000e9f940 RSI: ffffc90000e9f920 RDI: ffff88810ab2fb80 RBP: ffffc90000e9fa90 R08: ffff8881152031bf R09: 1ffff11022a40637 R10: 000000002d885f5a R11: 0000000000000000 R12: ffffc90000e9f920 R13: ffffc90000e9f940 R14: ffff8881152031b8 R15: ffff88810ab2fb80 FS: 000055557d217500(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff1 CR3: 0000000110f2c000 CR4: 00000000003526b0 Call Trace: start_merge drivers/md/dm-snap.c:1167 [inline] snapshot_merge_resume+0x256/0x2b0 drivers/md/dm-snap.c:2307 dm_table_resume_targets+0x23c/0x380 drivers/md/dm-table.c:2041 __dm_resume+0x25/0x1b0 drivers/md/dm.c:3097 dm_resume+0x16a/0x1f0 drivers/md/dm.c:3143 do_resume drivers/md/dm-ioctl.c:1224 [inline] dev_suspend+0x3ff/0x700 drivers/md/dm-ioctl.c:1256 ctl_ioctl drivers/md/dm-ioctl.c:2107 [inline] dm_ctl_ioctl+0x8f3/0xde0 drivers/md/dm-ioctl.c:2129 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0x123/0x1b0 fs/ioctl.c:892 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:892 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f7980d9f559 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:00007ffdc0805338 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7981025fa0 RCX: 00007f7980d9f559 RDX: 0000200000000980 RSI: 00000000c138fd06 RDI: 0000000000000003 RBP: 00007f7980e36b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7981025fac R14: 00007f7981025fa0 R15: 00007f7981025fa0 Modules linked in: CR2: fffffffffffffff1 ---[ end trace 0000000000000000 ]--- RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057 Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 62 7d df fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba 5a 5f 88 2d <45> 03 53 f1 74 02 0f 0b 2e e8 82 e3 fd 1b 89 c3 bf 01 00 00 00 89 RSP: 0018:ffffc90000e9f8a0 EFLAGS: 00010246 RAX: 1ffffffff1062c8f RBX: ffffffff88316478 RCX: dffffc0000000000 RDX: ffffc90000e9f940 RSI: ffffc90000e9f920 RDI: ffff88810ab2fb80 RBP: ffffc90000e9fa90 R08: ffff8881152031bf R09: 1ffff11022a40637 R10: 000000002d885f5a R11: 0000000000000000 R12: ffffc90000e9f920 R13: ffffc90000e9f940 R14: ffff8881152031b8 R15: ffff88810ab2fb80 FS: 000055557d217500(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff1 CR3: 0000000110f2c000 CR4: 00000000003526b0 ---------------- Code disassembly (best guess): 0: 83 c3 38 add $0x38,%ebx 3: 48 89 d8 mov %rbx,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) e: 74 08 je 0x18 10: 48 89 df mov %rbx,%rdi 13: e8 62 7d df fd call 0xfddf7d7a 18: 4c 8b 1b mov (%rbx),%r11 1b: 4c 89 ff mov %r15,%rdi 1e: 4c 89 e6 mov %r12,%rsi 21: 4c 89 ea mov %r13,%rdx 24: 41 ba 5a 5f 88 2d mov $0x2d885f5a,%r10d * 2a: 45 03 53 f1 add -0xf(%r11),%r10d <-- trapping instruction 2e: 74 02 je 0x32 30: 0f 0b ud2 32: 2e e8 82 e3 fd 1b cs call 0x1bfde3ba 38: 89 c3 mov %eax,%ebx 3a: bf 01 00 00 00 mov $0x1,%edi 3f: 89 .byte 0x89 final repro crashed as (corrupted=false): BUG: unable to handle page fault for address: fffffffffffffff1 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 7cae067 P4D 7cae067 PUD 7cb0067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 04b5f10b80d13b0533bf6aaa302b886c75cf6d37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057 Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 62 7d df fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba 5a 5f 88 2d <45> 03 53 f1 74 02 0f 0b 2e e8 82 e3 fd 1b 89 c3 bf 01 00 00 00 89 RSP: 0018:ffffc90000e9f8a0 EFLAGS: 00010246 RAX: 1ffffffff1062c8f RBX: ffffffff88316478 RCX: dffffc0000000000 RDX: ffffc90000e9f940 RSI: ffffc90000e9f920 RDI: ffff88810ab2fb80 RBP: ffffc90000e9fa90 R08: ffff8881152031bf R09: 1ffff11022a40637 R10: 000000002d885f5a R11: 0000000000000000 R12: ffffc90000e9f920 R13: ffffc90000e9f940 R14: ffff8881152031b8 R15: ffff88810ab2fb80 FS: 000055557d217500(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff1 CR3: 0000000110f2c000 CR4: 00000000003526b0 Call Trace: start_merge drivers/md/dm-snap.c:1167 [inline] snapshot_merge_resume+0x256/0x2b0 drivers/md/dm-snap.c:2307 dm_table_resume_targets+0x23c/0x380 drivers/md/dm-table.c:2041 __dm_resume+0x25/0x1b0 drivers/md/dm.c:3097 dm_resume+0x16a/0x1f0 drivers/md/dm.c:3143 do_resume drivers/md/dm-ioctl.c:1224 [inline] dev_suspend+0x3ff/0x700 drivers/md/dm-ioctl.c:1256 ctl_ioctl drivers/md/dm-ioctl.c:2107 [inline] dm_ctl_ioctl+0x8f3/0xde0 drivers/md/dm-ioctl.c:2129 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0x123/0x1b0 fs/ioctl.c:892 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:892 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f7980d9f559 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:00007ffdc0805338 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7981025fa0 RCX: 00007f7980d9f559 RDX: 0000200000000980 RSI: 00000000c138fd06 RDI: 0000000000000003 RBP: 00007f7980e36b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7981025fac R14: 00007f7981025fa0 R15: 00007f7981025fa0 Modules linked in: CR2: fffffffffffffff1 ---[ end trace 0000000000000000 ]--- RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057 Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 62 7d df fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba 5a 5f 88 2d <45> 03 53 f1 74 02 0f 0b 2e e8 82 e3 fd 1b 89 c3 bf 01 00 00 00 89 RSP: 0018:ffffc90000e9f8a0 EFLAGS: 00010246 RAX: 1ffffffff1062c8f RBX: ffffffff88316478 RCX: dffffc0000000000 RDX: ffffc90000e9f940 RSI: ffffc90000e9f920 RDI: ffff88810ab2fb80 RBP: ffffc90000e9fa90 R08: ffff8881152031bf R09: 1ffff11022a40637 R10: 000000002d885f5a R11: 0000000000000000 R12: ffffc90000e9f920 R13: ffffc90000e9f940 R14: ffff8881152031b8 R15: ffff88810ab2fb80 FS: 000055557d217500(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff1 CR3: 0000000110f2c000 CR4: 00000000003526b0 ---------------- Code disassembly (best guess): 0: 83 c3 38 add $0x38,%ebx 3: 48 89 d8 mov %rbx,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) e: 74 08 je 0x18 10: 48 89 df mov %rbx,%rdi 13: e8 62 7d df fd call 0xfddf7d7a 18: 4c 8b 1b mov (%rbx),%r11 1b: 4c 89 ff mov %r15,%rdi 1e: 4c 89 e6 mov %r12,%rsi 21: 4c 89 ea mov %r13,%rdx 24: 41 ba 5a 5f 88 2d mov $0x2d885f5a,%r10d * 2a: 45 03 53 f1 add -0xf(%r11),%r10d <-- trapping instruction 2e: 74 02 je 0x32 30: 0f 0b ud2 32: 2e e8 82 e3 fd 1b cs call 0x1bfde3ba 38: 89 c3 mov %eax,%ebx 3a: bf 01 00 00 00 mov $0x1,%edi 3f: 89 .byte 0x89