ci2 starts bisection 2026-05-06 18:46:59.315293878 +0000 UTC m=+27497.346129700
bisecting fixing commit since dad37bbb13a8cb34a50620b396e22db5eff2dfdd
building syzkaller on 4180d91913899c7394d15307c52f8ec0b228f6cc
ensuring issue is reproducible on original commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd

testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1c1007d721be175aee7deaed1991a79099362fcdafabc664d91bfe8ea3c1b37f
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_mb_normalize_request
run #4: crashed: kernel BUG in ext4_mb_normalize_request
run #5: crashed: kernel BUG in ext4_split_extent_at
run #6: crashed: kernel BUG in ext4_ext_map_blocks
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_es_cache_extent
run #11: crashed: kernel BUG in ext4_mb_normalize_request
run #12: crashed: kernel BUG in ext4_split_extent_at
run #13: crashed: kernel BUG in ext4_ext_map_blocks
run #14: crashed: kernel BUG in ext4_split_extent_at
run #15: crashed: kernel BUG in ext4_split_extent_at
run #16: crashed: kernel BUG in ext4_split_extent_at
run #17: crashed: kernel BUG in ext4_mb_normalize_request
run #18: crashed: kernel BUG in ext4_ext_map_blocks
run #19: 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 [atomic_sleep hang memleak ubsan kasan locking], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: c73e41f5494c37219acca5e93f233002aafb5c7e9a66aed0035308d25df8ad5e
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_mb_normalize_request
run #2: crashed: kernel BUG in ext4_mb_normalize_request
run #3: crashed: kernel BUG in ext4_split_extent_at
run #4: crashed: kernel BUG in ext4_es_cache_extent
run #5: crashed: kernel BUG in ext4_mb_normalize_request
run #6: crashed: kernel BUG in ext4_mb_normalize_request
run #7: crashed: kernel BUG in ext4_mb_normalize_request
run #8: crashed: kernel BUG in ext4_split_extent_at
run #9: 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 [atomic_sleep hang memleak ubsan kasan locking], they are not needed
kconfig minimization: base=4788 full=6025 leaves diff=248
split chunks (needed=false): <248>
split chunk #0 of len 248 into 5 parts
testing without sub-chunk 1/5
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 36a2ca4b4c6d2f8f17bbd635828ac3b5d136625e785e82d4b20bc6a23e650bb6
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_mb_normalize_request
run #2: crashed: kernel BUG in ext4_split_extent_at
run #3: crashed: kernel BUG in ext4_mb_normalize_request
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_ext_map_blocks
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 [locking atomic_sleep hang memleak ubsan kasan], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: ebfad330b2939977f0cede5f4360f692ca1769eede5a567d359684e22287ad6b
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_mb_normalize_request
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: crashed: kernel BUG in ext4_split_extent_at
run #9: 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 3/5
disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 21d25862da51bea7a5b4f7fe94fa5e1922a05f1d606d425abb1b1173242673da
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_mb_use_inode_pa
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: crashed: kernel BUG in ext4_split_extent_at
run #9: crashed: kernel BUG in ext4_mb_normalize_request
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 memleak ubsan kasan locking atomic_sleep], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: ee5713b91bf398d8fe977c258fadfe3e1773d237274071b0920cfeed47ef01a0
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_mb_normalize_request
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 [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing commit dad37bbb13a8cb34a50620b396e22db5eff2dfdd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
failed building dad37bbb13a8cb34a50620b396e22db5eff2dfdd: net/socket.c:1128:(.text+0x837): undefined reference to `wext_handle_ioctl'
net/socket.c:3397:(.text+0xa28): undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:346:(.text+0x109): undefined reference to `wext_proc_exit'
net/core/net-procfs.c:330:(.text+0x1e4): 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 USB_XHCI_PCI_RENESAS 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 ZEROPLUS_FF]
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing current HEAD 95a92a883bae64d25d569e40548091b7f706121b
testing commit 95a92a883bae64d25d569e40548091b7f706121b gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: e94c14a1f72272e231a6bfb61633995c321ccebe3a29630440e2423102e5b316
run #0: crashed: kernel BUG in ext4_split_extent_at
run #1: crashed: kernel BUG in ext4_mb_normalize_request
run #2: crashed: kernel BUG in ext4_mb_use_inode_pa
run #3: crashed: kernel BUG in ext4_mb_normalize_request
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
representative crash: kernel BUG in ext4_split_extent_at, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 2h34m29.839311046s (build: 25m25.099133025s, test: 1h24m59.291595474s)
crash still not fixed or there were kernel test errors
commit msg: Merge aca3ad0c262f ("esp: fix skb leak with espintcp and async crypto") into android13-5.10-lts
crash: kernel BUG in ext4_split_extent_at
EXT4-fs (loop2): mounted filesystem without journal. Opts: delalloc,data_err=abort,barrier=0x0000000000000003,bsddf,bh,oldalloc,data_err=ignore,nouid32,nobh,user_xattr,nouid32,dioread_nolock,,errors=continue
EXT4-fs error (device loop2): ext4_mb_mark_diskspace_used:3356: comm syz.2.27: Allocating blocks 497-513 which overlap fs metadata
EXT4-fs (loop2): pa ffff88810e1870d0: logic 128, phys. 385, len 8
EXT4-fs error (device loop2): ext4_mb_release_inode_pa:4366: group 0, free 0, pa_free 1
------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:3184!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 542 Comm: syz.2.27 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:ext4_split_extent_at+0x2ef/0x5f0 fs/ext4/extents.c:3184
Code: 0c 00 00 48 c7 c7 40 53 5e 82 66 41 89 44 24 04 41 0f b7 47 08 4c 8d 04 40 49 c1 e0 04 4d 01 f8 e8 96 cb ff ff e9 08 fe ff ff <0f> 0b f6 45 b4 04 41 0f b7 44 24 04 0f 85 89 00 00 00 8d 90 00 80
RSP: 0018:ffffc9000059b748 EFLAGS: 00010293
RAX: 0000000000000007 RBX: 00000000000000ad RCX: 00000000000000ad
RDX: 0000000000000018 RSI: ffff88810e26b288 RDI: 0000000000000007
RBP: ffffc9000059b7d8 R08: ffff888117f3d030 R09: 0000000000000007
R10: 0000000000000011 R11: ffffc9000059b900 R12: ffff88810ac3d430
R13: ffff88810e26b288 R14: 0000000000000001 R15: ffff888117f3d000
FS:  00007fbd46ec96c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd46ea7ff8 CR3: 00000001174c9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_split_extent+0xd4/0x1a0 fs/ext4/extents.c:3392
 ext4_split_convert_extents+0xb2/0xc0 fs/ext4/extents.c:3725
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3886 [inline]
 ext4_ext_map_blocks+0xd38/0x1a30 fs/ext4/extents.c:4241
 ext4_map_blocks+0x194/0x5a0 fs/ext4/inode.c:674
 mpage_map_one_extent fs/ext4/inode.c:2452 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2505 [inline]
 ext4_writepages+0x829/0x1180 fs/ext4/inode.c:2873
 do_writepages+0x30/0xb0 mm/page-writeback.c:2380
 __filemap_fdatawrite_range+0xc7/0x100 mm/filemap.c:427
 file_write_and_wait_range+0x4e/0x80 mm/filemap.c:766
 ext4_sync_file+0x76/0x380 fs/ext4/fsync.c:151
 vfs_fsync_range+0x41/0x80 fs/sync.c:202
 generic_write_sync include/linux/fs.h:2920 [inline]
 ext4_buffered_write_iter+0x10d/0x150 fs/ext4/file.c:278
 ext4_file_write_iter+0x5b/0x840 fs/ext4/file.c:685
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write+0x105/0x190 fs/read_write.c:518
 vfs_write+0x1fb/0x290 fs/read_write.c:605
 ksys_pwrite64 fs/read_write.c:712 [inline]
 __do_sys_pwrite64 fs/read_write.c:722 [inline]
 __se_sys_pwrite64 fs/read_write.c:719 [inline]
 __x64_sys_pwrite64+0x87/0xc0 fs/read_write.c:719
 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fbd47066799
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:00007fbd46ec9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007fbd472dffa0 RCX: 00007fbd47066799
RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007fbd470fcbd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbd472e0038 R14: 00007fbd472dffa0 R15: 00007ffdafaeec28
Modules linked in:
---[ end trace ca4b12bd1746468d ]---
RIP: 0010:ext4_split_extent_at+0x2ef/0x5f0 fs/ext4/extents.c:3184
Code: 0c 00 00 48 c7 c7 40 53 5e 82 66 41 89 44 24 04 41 0f b7 47 08 4c 8d 04 40 49 c1 e0 04 4d 01 f8 e8 96 cb ff ff e9 08 fe ff ff <0f> 0b f6 45 b4 04 41 0f b7 44 24 04 0f 85 89 00 00 00 8d 90 00 80
RSP: 0018:ffffc9000059b748 EFLAGS: 00010293
RAX: 0000000000000007 RBX: 00000000000000ad RCX: 00000000000000ad
RDX: 0000000000000018 RSI: ffff88810e26b288 RDI: 0000000000000007
RBP: ffffc9000059b7d8 R08: ffff888117f3d030 R09: 0000000000000007
R10: 0000000000000011 R11: ffffc9000059b900 R12: ffff88810ac3d430
R13: ffff88810e26b288 R14: 0000000000000001 R15: ffff888117f3d000
FS:  00007fbd46ec96c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd46ea7ff8 CR3: 00000001174c9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400