ci2 starts bisection 2026-01-05 14:37:28.332540216 +0000 UTC m=+3460060.509663273 bisecting fixing commit since b328aff1d7b88b3ea6800d531733b1fa07d3a7ac building syzkaller on 91305dbed501aca571ad5dbf0f1f1d7847966052 ensuring issue is reproducible on original commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fa5b80ff3c752f2e3bb4aca04d0c70549b9aa61fb462f3803dfff2513e4e9f9e run #0: crashed: general protection fault in __ext4_journal_get_write_access run #1: crashed: general protection fault in __ext4_journal_get_write_access run #2: crashed: general protection fault in __ext4_journal_get_write_access run #3: crashed: general protection fault in __ext4_journal_get_write_access run #4: crashed: general protection fault in __ext4_journal_get_write_access run #5: crashed: general protection fault in __ext4_journal_get_write_access run #6: crashed: general protection fault in __ext4_journal_get_write_access run #7: crashed: general protection fault in __ext4_journal_get_write_access run #8: crashed: general protection fault in __ext4_journal_get_write_access run #9: crashed: general protection fault in __ext4_journal_get_write_access run #10: crashed: general protection fault in __ext4_journal_get_write_access run #11: crashed: general protection fault in __ext4_journal_get_write_access run #12: crashed: general protection fault in __ext4_journal_get_write_access run #13: crashed: general protection fault in __ext4_journal_get_write_access run #14: crashed: general protection fault in __ext4_journal_get_write_access run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: general protection fault in __ext4_journal_get_write_access, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8d2589f568ec1f76375d2d8ba7edc971faac0dcd4bf7cb0b651e808cbf75f46f run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #8: OK run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed kconfig minimization: base=5186 full=6556 leaves diff=265 split chunks (needed=false): <265> split chunk #0 of len 265 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c28875d5fcf18a6d439e7c7b9bb86f816e817fd3318e8dde5d4b497d7e97554d run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1fed720d66109778aa6374da9ab2eaf6cb6c961ad6b09df8197975e23cd6572d run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f3beee2708fa45a001fe5950066050ca86a517c09bf480c128e417c8b6979f90 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #16: OK run #17: OK run #18: OK run #19: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: de9eefa1b1b8acb33e8c0edd3ae09f3c1d74bd5af12e4a0ab15b897ffa5ee634 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit b328aff1d7b88b3ea6800d531733b1fa07d3a7ac gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building b328aff1d7b88b3ea6800d531733b1fa07d3a7ac: ld.lld: error: undefined symbol: wext_proc_init ld.lld: error: undefined symbol: wext_proc_exit ld.lld: error: undefined symbol: wext_handle_ioctl ld.lld: error: undefined symbol: compat_wext_handle_ioctl minimized to 53 configs; suspects: [HID_ZEROPLUS USB_MON USB_NET_CDC_MBIM 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_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 V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 5e6db704570401cf7c881129fa38842ddce8f945 testing commit 5e6db704570401cf7c881129fa38842ddce8f945 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5d3f65e656a6df9df9e77ab0440849385b2ff86dcdd68ffff7f78134d53989c0 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release reproducer is flaky (0.55 repro chance estimate) revisions tested: 7, total time: 2h31m5.862532665s (build: 45m11.047067607s, test: 1h42m50.80368722s) crash still not fixed or there were kernel test errors commit msg: ANDROID: oplus add symbols to symbol list crash: BUG: unable to handle kernel NULL pointer dereference in __ext4_journal_get_write_access EXT4-fs error (device loop0): ext4_evict_inode:279: inode #11: comm syz.0.25: mark_inode_dirty error EXT4-fs warning (device loop0): ext4_evict_inode:282: couldn't mark inode dirty (err -117) EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. BUG: kernel NULL pointer dereference, address: 0000000000000038 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 11d5ba067 P4D 11d5ba067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 522 Comm: syz.0.25 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__ext4_journal_get_write_access+0x41/0x1d0 fs/ext4/ext4_jbd2.c:231 Code: 4c 24 04 48 89 4c 24 18 48 89 d3 41 89 f4 48 89 7c 24 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 30 4c 89 44 24 08 49 8b 40 30 <4c> 8b 70 38 4d 85 f6 0f 84 90 00 00 00 49 8b 86 08 01 00 00 48 8b RSP: 0018:ffffc90000b6fb50 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88810b2e6000 RDX: 0000000000000001 RSI: 0000000000000045 RDI: ffffffff83053425 RBP: ffffc90000b6fbc0 R08: ffff88810da3ba28 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff818d7ec0 R12: 0000000000000045 R13: ffff8881147b7000 R14: ffff8881147b7000 R15: ffff88810da3ba28 FS: 00007f33f9f426c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 0000000111776000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_update_primary_sb fs/ext4/ioctl.c:67 [inline] ext4_update_superblocks_fn+0xeb/0x5a0 fs/ext4/ioctl.c:221 ext4_update_overhead+0x40/0x50 fs/ext4/ioctl.c:1709 ext4_fill_super+0x20a1/0x20d0 fs/ext4/super.c:5667 get_tree_bdev+0x1c3/0x240 fs/super.c:1368 ext4_get_tree+0x10/0x20 fs/ext4/super.c:5678 vfs_get_tree+0x2f/0x90 fs/super.c:1575 do_new_mount+0x14a/0x360 fs/namespace.c:3078 path_mount+0x36b/0x520 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x141/0x1a0 fs/namespace.c:3606 __x64_sys_mount+0x20/0x30 fs/namespace.c:3606 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f33f919066a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f33f9f41e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f33f9f41ef0 RCX: 00007f33f919066a RDX: 0000200000000140 RSI: 0000200000000040 RDI: 00007f33f9f41eb0 RBP: 0000200000000140 R08: 00007f33f9f41ef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f33f9f41eb0 R14: 00000000000005fc R15: 0000200000000080 Modules linked in: CR2: 0000000000000038 ---[ end trace 0000000000000000 ]--- RIP: 0010:__ext4_journal_get_write_access+0x41/0x1d0 fs/ext4/ext4_jbd2.c:231 Code: 4c 24 04 48 89 4c 24 18 48 89 d3 41 89 f4 48 89 7c 24 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 30 4c 89 44 24 08 49 8b 40 30 <4c> 8b 70 38 4d 85 f6 0f 84 90 00 00 00 49 8b 86 08 01 00 00 48 8b RSP: 0018:ffffc90000b6fb50 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88810b2e6000 RDX: 0000000000000001 RSI: 0000000000000045 RDI: ffffffff83053425 RBP: ffffc90000b6fbc0 R08: ffff88810da3ba28 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff818d7ec0 R12: 0000000000000045 R13: ffff8881147b7000 R14: ffff8881147b7000 R15: ffff88810da3ba28 FS: 00007f33f9f426c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 0000000111776000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 24 04 rex.WR and $0x4,%al 3: 48 89 4c 24 18 mov %rcx,0x18(%rsp) 8: 48 89 d3 mov %rdx,%rbx b: 41 89 f4 mov %esi,%r12d e: 48 89 7c 24 10 mov %rdi,0x10(%rsp) 13: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax 1a: 00 00 1c: 48 89 44 24 30 mov %rax,0x30(%rsp) 21: 4c 89 44 24 08 mov %r8,0x8(%rsp) 26: 49 8b 40 30 mov 0x30(%r8),%rax * 2a: 4c 8b 70 38 mov 0x38(%rax),%r14 <-- trapping instruction 2e: 4d 85 f6 test %r14,%r14 31: 0f 84 90 00 00 00 je 0xc7 37: 49 8b 86 08 01 00 00 mov 0x108(%r14),%rax 3e: 48 rex.W 3f: 8b .byte 0x8b