ci2 starts bisection 2024-03-20 16:02:36.632015465 +0000 UTC m=+4328.895741145
bisecting fixing commit since 19c0ed55a470d1cd766484abab04871b648560fb
building syzkaller on 058b3a5a6a945a55767811552eb7b9f4a20307f8
ensuring issue is reproducible on original commit 19c0ed55a470d1cd766484abab04871b648560fb

testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 1746f4ecc22d9aa2f2cdb24e1a444e6855513c51c6e7d03acf5f4b047da19446
all runs: crashed: kernel BUG in ext4_split_extent_at
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d1a07a120a3e76d1fd8691f45fe8c0ee127a0ad554bc16ef2cb031dfd00cdc85
all runs: crashed: kernel BUG in ext4_split_extent_at
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
the bug reproduces without the instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
kconfig minimization: base=4920 full=6166 leaves diff=244
split chunks (needed=false): <244>
split chunk #0 of len 244 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b46552f85e6cd08b4bddd2eca6e2797014c972398038f650aea5395a2f445c8f
all runs: crashed: kernel BUG in ext4_split_extent_at
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0c05bcb545a1de89d9cf697fdf7527e06e7677184f586dd667bfde85b07c345b
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_split_extent_at
run #2: crashed: kernel BUG in ext4_split_extent_at
run #3: crashed: kernel BUG in ext4_split_extent_at
run #4: crashed: kernel BUG in ext4_split_extent_at
run #5: crashed: kernel BUG in ext4_split_extent_at
run #6: crashed: kernel BUG in ext4_split_extent_at
run #7: crashed: kernel BUG in ext4_split_extent_at
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0af533633c23e51bb44b04d837ce2a28cd09b0be9893bad56b44360286328f74
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_split_extent_at
run #2: crashed: kernel BUG in ext4_split_extent_at
run #3: crashed: kernel BUG in ext4_split_extent_at
run #4: crashed: kernel BUG in ext4_split_extent_at
run #5: crashed: kernel BUG in ext4_split_extent_at
run #6: crashed: kernel BUG in ext4_split_extent_at
run #7: crashed: kernel BUG in ext4_split_extent_at
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 26bf6f58aca4796abe251d431cad620ce2a40e42432ab234811a527913d02edf
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_split_extent_at
run #2: crashed: kernel BUG in ext4_split_extent_at
run #3: crashed: kernel BUG in ext4_split_extent_at
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
failed building 19c0ed55a470d1cd766484abab04871b648560fb: net/socket.c:1172: undefined reference to `wext_handle_ioctl'
net/socket.c:3366: undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:343: undefined reference to `wext_proc_exit'
net/core/net-procfs.c:327: undefined reference to `wext_proc_init'
minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS X86_X32 ZEROPLUS_FF]
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing current HEAD 993bed180178156a70afdafe8aaf23a117107352
testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5d9e18bc2e8aeb51ff553b46a225bd00ce30274832c936bd6951c1d30941c286
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_split_extent_at
run #2: crashed: kernel BUG in ext4_split_extent_at
run #3: crashed: kernel BUG in ext4_split_extent_at
run #4: crashed: kernel BUG in ext4_split_extent_at
run #5: crashed: kernel BUG in ext4_split_extent_at
run #6: crashed: kernel BUG in ext4_split_extent_at
run #7: crashed: kernel BUG in ext4_split_extent_at
run #8: crashed: kernel BUG in ext4_split_extent_at
run #9: crashed: kernel BUG in ext4_split_extent_at
run #10: crashed: kernel BUG in ext4_split_extent_at
run #11: OK
run #12: OK
run #13: OK
run #14: crashed: kernel BUG in ext4_split_extent_at
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
crash still not fixed/happens on the oldest tested release
reproducer is flaky (0.40 repro chance estimate)
revisions tested: 7, total time: 1h9m44.890333174s (build: 19m17.106750846s, test: 48m33.727405529s)
crash still not fixed or there were kernel test errors
commit msg: Merge "Merge branch 'android13-5.15' into branch 'android13-5.15-lts'" into android13-5.15-lts
crash: kernel BUG in ext4_split_extent_at
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_extents.h:200!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 911 Comm: syz-executor.2 Not tainted 5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:ext4_ext_mark_unwritten fs/ext4/ext4_extents.h:200 [inline]
RIP: 0010:ext4_split_extent_at+0x3fd/0x4e0 fs/ext4/extents.c:3221
Code: 4c 89 da 4c 89 e9 4c 89 f6 4c 89 5d b0 4c 89 ff e8 f8 d0 ff ff 4c 8b 5d b0 e9 27 fd ff ff f6 45 b0 07 0f 84 9c fc ff ff 0f 0b <0f> 0b 0f 0b 41 0f b7 45 04 4c 89 f7 41 0f b7 55 06 41 8b 75 00 8d
RSP: 0018:ffffc900014f78a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881130b6800
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888108e51528
RBP: ffffc900014f7928 R08: ffff888114284930 R09: 0000000000000000
R10: ffffc900014f7a50 R11: ffff888114284900 R12: 0000000000000000
R13: ffff888113cee00c R14: ffff88810af57798 R15: 0000000000000001
FS:  00007ff789cf86c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff789cf8d58 CR3: 000000011408e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_split_extent+0xce/0x190 fs/ext4/extents.c:3385
 ext4_split_convert_extents+0xa1/0xb0 fs/ext4/extents.c:3714
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3876 [inline]
 ext4_ext_map_blocks+0xdb9/0x1940 fs/ext4/extents.c:4168
 ext4_map_blocks+0x19a/0x5b0 fs/ext4/inode.c:646
 ext4_iomap_alloc fs/ext4/inode.c:3420 [inline]
 ext4_iomap_begin+0x131/0x2c0 fs/ext4/inode.c:3470
 iomap_iter+0x128/0x2d0 fs/iomap/iter.c:74
 __iomap_dio_rw+0x237/0x870 fs/iomap/direct-io.c:593
 iomap_dio_rw+0x9/0x30 fs/iomap/direct-io.c:680
 ext4_dio_write_iter fs/ext4/file.c:572 [inline]
 ext4_file_write_iter+0x352/0x830 fs/ext4/file.c:683
 call_write_iter include/linux/fs.h:2202 [inline]
 new_sync_write+0x105/0x190 fs/read_write.c:507
 vfs_write+0x239/0x2e0 fs/read_write.c:594
 ksys_write+0x62/0xe0 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x15/0x20 fs/read_write.c:656
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff792556959
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff789cf80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff792676050 RCX: 00007ff792556959
RDX: 0000000000000012 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007ff7925b2c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff792676050 R15: 00007fffee24ba88
 </TASK>
Modules linked in:
---[ end trace 54fbe605c1570289 ]---
RIP: 0010:ext4_ext_mark_unwritten fs/ext4/ext4_extents.h:200 [inline]
RIP: 0010:ext4_split_extent_at+0x3fd/0x4e0 fs/ext4/extents.c:3221
Code: 4c 89 da 4c 89 e9 4c 89 f6 4c 89 5d b0 4c 89 ff e8 f8 d0 ff ff 4c 8b 5d b0 e9 27 fd ff ff f6 45 b0 07 0f 84 9c fc ff ff 0f 0b <0f> 0b 0f 0b 41 0f b7 45 04 4c 89 f7 41 0f b7 55 06 41 8b 75 00 8d
RSP: 0018:ffffc900014f78a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881130b6800
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888108e51528
RBP: ffffc900014f7928 R08: ffff888114284930 R09: 0000000000000000
R10: ffffc900014f7a50 R11: ffff888114284900 R12: 0000000000000000
R13: ffff888113cee00c R14: ffff88810af57798 R15: 0000000000000001
FS:  00007ff789cf86c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec66f70000 CR3: 000000011408e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400