ci2 starts bisection 2026-01-16 10:27:30.807972562 +0000 UTC m=+4395462.985095609 bisecting fixing commit since 057fdbf6d3c79123ad58eb55aa2428b2d951b04d building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4 ensuring issue is reproducible on original commit 057fdbf6d3c79123ad58eb55aa2428b2d951b04d testing commit 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 42965028e41eb8c0c1abd842b5b8df63f874ab2f4fb6e446347bf31d37ab4835 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent run #10: crashed: kernel BUG in ext4_ext_insert_extent run #11: crashed: kernel BUG in ext4_ext_insert_extent run #12: crashed: kernel BUG in ext4_ext_insert_extent run #13: crashed: kernel BUG in ext4_ext_insert_extent run #14: crashed: kernel BUG in ext4_ext_insert_extent run #15: crashed: kernel BUG in ext4_ext_insert_extent run #16: crashed: kernel BUG in ext4_ext_insert_extent run #17: crashed: kernel BUG in ext4_ext_insert_extent run #18: crashed: kernel BUG in ext4_ext_insert_extent run #19: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, 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 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c425b50dbb3d3ea98195e252c3772b60bdbea3fff218461a0b2346291b056422 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, types: [BUG] the bug reproduces without the instrumentation disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed kconfig minimization: base=4921 full=6220 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 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 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5603b3411c149baaee56705bb8944a85bc2d7a3ba71dd90bf44020259ee8a263 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 693d3ef97c5b209797e18f376898601e70f32c0a6b26c67aa03b001d9cd26ad2 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, 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 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d17fa3597f93e1908ab75da660e3096f13b19d2cad3053ec819d3949ea666c0d all runs: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0ccc1bb529abb6c8d82893a36a40a8dc2d6e5512167b9b1efd78ef7b99e1b178 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: kernel BUG in ext4_ext_insert_extent run #3: crashed: kernel BUG in ext4_ext_insert_extent run #4: crashed: kernel BUG in ext4_ext_insert_extent run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 057fdbf6d3c79123ad58eb55aa2428b2d951b04d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 057fdbf6d3c79123ad58eb55aa2428b2d951b04d: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3390: 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 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 [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing current HEAD 050dc55b0457aa6986b7618175ec7ccae95b842a testing commit 050dc55b0457aa6986b7618175ec7ccae95b842a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 485b64579684137da990d63a24f20708b81e1219442e8d340867cce843833377 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: kernel BUG in ext4_ext_insert_extent run #6: crashed: kernel BUG in ext4_ext_insert_extent run #7: crashed: kernel BUG in ext4_ext_insert_extent run #8: crashed: kernel BUG in ext4_ext_insert_extent run #9: crashed: kernel BUG in ext4_ext_insert_extent representative crash: kernel BUG in ext4_ext_insert_extent, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h28m47.316333732s (build: 21m1.324187807s, test: 1h5m41.175395599s) crash still not fixed or there were kernel test errors commit msg: Revert "net/sched: act_connmark: handle errno on tcf_idr_check_alloc" crash: kernel BUG in ext4_ext_insert_extent ------------[ cut here ]------------ kernel BUG at fs/ext4/extents.c:1015! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 763 Comm: syz.1.75 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:ext4_ext_insert_index fs/ext4/extents.c:1015 [inline] RIP: 0010:ext4_ext_split fs/ext4/extents.c:1275 [inline] RIP: 0010:ext4_ext_create_new_leaf fs/ext4/extents.c:1419 [inline] RIP: 0010:ext4_ext_insert_extent+0x1324/0x13a0 fs/ext4/extents.c:2103 Code: 32 48 05 00 c7 45 cc 8b ff ff ff 5b e9 7d f7 ff ff 44 8b 65 80 4c 89 7d 88 e9 49 fd ff ff c7 45 b0 ff ff ff ff e9 c6 f7 ff ff <0f> 0b 49 c7 c1 1f ff c7 82 45 31 c0 31 c9 ba f2 03 00 00 48 c7 c6 RSP: 0018:ffffc90000fb3680 EFLAGS: 00010282 RAX: 00000000fffffffe RBX: ffff88811e327b70 RCX: ffff88811e6f0400 RDX: fffffffffffffffe RSI: ffff88811e6f07f0 RDI: ffff888108e8c7e8 RBP: ffffc90000fb3730 R08: ffff88811b11cd00 R09: 0000000000000001 R10: ffff888114b1a000 R11: 0000000000000000 R12: 0000000000000002 R13: ffff88811b144c98 R14: 0000000000000001 R15: ffff88811e6f0424 FS: 00007f60d295a6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60d2959f98 CR3: 000000011e202000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_ext_map_blocks+0x5d5/0x19a0 fs/ext4/extents.c:4362 ext4_map_blocks+0x194/0x5a0 fs/ext4/inode.c:674 _ext4_get_block+0x8e/0x110 fs/ext4/inode.c:817 ext4_get_block_unwritten+0xe/0x10 fs/ext4/inode.c:848 ext4_block_write_begin+0x178/0x570 fs/ext4/inode.c:1102 ext4_write_begin+0x1fa/0x680 fs/ext4/inode.c:1243 ext4_da_write_begin+0x1f2/0x400 fs/ext4/inode.c:2988 generic_perform_write+0xbb/0x250 mm/filemap.c:3870 ext4_buffered_write_iter+0x9f/0x160 fs/ext4/file.c:270 ext4_file_write_iter+0x5b/0x670 fs/ext4/file.c:664 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write+0x105/0x190 fs/read_write.c:507 vfs_write+0x23c/0x2e0 fs/read_write.c:594 ksys_pwrite64 fs/read_write.c:701 [inline] __do_sys_pwrite64 fs/read_write.c:711 [inline] __se_sys_pwrite64 fs/read_write.c:708 [inline] __x64_sys_pwrite64+0x87/0xc0 fs/read_write.c:708 x64_sys_call+0x904/0x990 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f60d2b0b749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f60d295a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f60d2d62090 RCX: 00007f60d2b0b749 RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007f60d2b8ff91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f60d2d62128 R14: 00007f60d2d62090 R15: 00007ffd48b53078 Modules linked in: ---[ end trace f6dc5c04d0daa612 ]--- RIP: 0010:ext4_ext_insert_index fs/ext4/extents.c:1015 [inline] RIP: 0010:ext4_ext_split fs/ext4/extents.c:1275 [inline] RIP: 0010:ext4_ext_create_new_leaf fs/ext4/extents.c:1419 [inline] RIP: 0010:ext4_ext_insert_extent+0x1324/0x13a0 fs/ext4/extents.c:2103 Code: 32 48 05 00 c7 45 cc 8b ff ff ff 5b e9 7d f7 ff ff 44 8b 65 80 4c 89 7d 88 e9 49 fd ff ff c7 45 b0 ff ff ff ff e9 c6 f7 ff ff <0f> 0b 49 c7 c1 1f ff c7 82 45 31 c0 31 c9 ba f2 03 00 00 48 c7 c6 RSP: 0018:ffffc90000fb3680 EFLAGS: 00010282 RAX: 00000000fffffffe RBX: ffff88811e327b70 RCX: ffff88811e6f0400 RDX: fffffffffffffffe RSI: ffff88811e6f07f0 RDI: ffff888108e8c7e8 RBP: ffffc90000fb3730 R08: ffff88811b11cd00 R09: 0000000000000001 R10: ffff888114b1a000 R11: 0000000000000000 R12: 0000000000000002 R13: ffff88811b144c98 R14: 0000000000000001 R15: ffff88811e6f0424 FS: 00007f60d295a6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7142192000 CR3: 000000011e202000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400