ci2 starts bisection 2026-05-05 11:55:37.703882843 +0000 UTC m=+9904.464665672 bisecting fixing commit since e253c52bbdfce1f214777784549a350a8f9ba3b8 building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4 ensuring issue is reproducible on original commit e253c52bbdfce1f214777784549a350a8f9ba3b8 testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 144ada128afab0aa0fc11002db591dcd05eb021e83d4dbdbc48c3b3fb6bf5f7b 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: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9792df1916ab56395988190cbdda3bd4a0106b7284d3b2ccfd5f932fba09c45f run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=4788 full=6026 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 [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: db9998e6f6f93ed9d9d2e5c5071965f842343c50914e2d8230d614276c0187f9 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 57ce3dc46955894cd555965e746a6beaba7e22428d341f7dd2cdbedaeecf880a all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] 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 e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 6f842c1fa5cbc2e4439e193b8069b731cac347c99420c35406ff7f11f16cc87f run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: e1c362956ffb85ccbbcf4ff24b1270e62ecf8f7146a43301b3945a6ab3055966 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: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] 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 e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building e253c52bbdfce1f214777784549a350a8f9ba3b8: 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 [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 7ae299a5827ae907825706c33e93f124c678e853 testing commit 7ae299a5827ae907825706c33e93f124c678e853 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 768912cdc6cf07ed9eb32393d71e3b9f94f6872051b1cde13ece0545e3279ba3 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress representative crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 2h31m13.872229118s (build: 1h13m50.462413572s, test: 53m40.833636699s) crash still not fixed or there were kernel test errors commit msg: Revert "wifi: libertas: fix use-after-free in lbs_free_adapter()" crash: BUG: unable to handle kernel NULL pointer dereference in z_erofs_decompress erofs: (device loop2): mounted with root inode @ nid 36. erofs: (device loop2): z_erofs_extent_lookback: bogus lookback distance @ nid 36 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1178a2067 P4D 1178a2067 PUD 0 Oops: 0010 [#1] PREEMPT SMP CPU: 0 PID: 485 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc90000733430 EFLAGS: 00010202 RAX: 0000000000000010 RBX: ffff88810ee2e4a8 RCX: 0000000000001000 RDX: 0000000000000001 RSI: ffffc900007339c0 RDI: ffffc900007334b0 RBP: ffffc90000733438 R08: 0000000000000000 R09: 00000000000008c5 R10: ffffc900007334e0 R11: 0000000000001000 R12: ffffea00045b2500 R13: ffff88810ee2e438 R14: 0000000000000000 R15: ffff88811386b200 FS: 00007fbc70e7c6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000117893000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: z_erofs_decompress+0x11/0x20 fs/erofs/decompressor.c:360 z_erofs_decompress_pcluster.isra.0+0x470/0x9c0 fs/erofs/zdata.c:1110 z_erofs_decompress_queue fs/erofs/zdata.c:1188 [inline] z_erofs_runqueue+0x61a/0x7d0 fs/erofs/zdata.c:1515 z_erofs_readpage+0xc0/0x1e0 fs/erofs/zdata.c:1533 do_read_cache_page+0x263/0x400 mm/filemap.c:3197 read_cache_page+0xd/0x10 mm/filemap.c:3296 read_mapping_page include/linux/pagemap.h:498 [inline] find_target_block_classic fs/erofs/namei.c:104 [inline] erofs_namei+0xb6/0x620 fs/erofs/namei.c:184 erofs_lookup fs/erofs/namei.c:228 [inline] erofs_lookup+0xaf/0xf0 fs/erofs/namei.c:208 __lookup_slow+0x79/0x150 fs/namei.c:1648 lookup_slow fs/namei.c:1665 [inline] walk_component+0x139/0x1b0 fs/namei.c:1960 link_path_walk.part.0+0x219/0x340 fs/namei.c:2283 link_path_walk fs/namei.c:2212 [inline] path_openat+0xb3/0x10d0 fs/namei.c:3513 do_filp_open+0x9d/0x140 fs/namei.c:3544 do_sys_openat2+0x9c/0x210 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_open fs/open.c:1243 [inline] __se_sys_open fs/open.c:1239 [inline] __x64_sys_open+0x52/0x90 fs/open.c:1239 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbc71017ef9 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:00007fbc70e7c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fbc71282fa0 RCX: 00007fbc71017ef9 RDX: 0000000000000000 RSI: 00000000001a1342 RDI: 0000200000000000 RBP: 00007fbc710acee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbc71283038 R14: 00007fbc71282fa0 R15: 00007ffd38aff008 Modules linked in: CR2: 0000000000000000 ---[ end trace 8595ad8b66d192ed ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc90000733430 EFLAGS: 00010202 RAX: 0000000000000010 RBX: ffff88810ee2e4a8 RCX: 0000000000001000 RDX: 0000000000000001 RSI: ffffc900007339c0 RDI: ffffc900007334b0 RBP: ffffc90000733438 R08: 0000000000000000 R09: 00000000000008c5 R10: ffffc900007334e0 R11: 0000000000001000 R12: ffffea00045b2500 R13: ffff88810ee2e438 R14: 0000000000000000 R15: ffff88811386b200 FS: 00007fbc70e7c6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000117893000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400