ci2 starts bisection 2025-04-15 15:06:39.375906617 +0000 UTC m=+17741.249906972 bisecting fixing commit since 8d23314f588a573519ab88c332e94c927f870810 building syzkaller on c673ca06b23cea94091ab496ef62c3513e434585 ensuring issue is reproducible on original commit 8d23314f588a573519ab88c332e94c927f870810 testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 12203585705ef25c041914c0c0463c4d5fd2c30f986d5a964b6b33a6058eada8 all runs: crashed: general protection fault in current_umask representative crash: general protection fault in current_umask, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dd567ca9aaa05331c80d7d1eb0a3ddcfefc01974bcc60f74979020caad7d199e all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4789 full=6020 leaves diff=243 split chunks (needed=false): <243> split chunk #0 of len 243 into 5 parts testing without sub-chunk 1/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 166f648e3ab8f29b73ac9573bf91b01e74d3f51a594744d94b8b69addd2b4f95 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ea2882b67400bd36e74f766c18f1aa48fdd0ba616828510017817b622428ef64 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 566d96885d95319f9bf66f2cac385f2197c55f574df2c56413d32bc168456626 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 33122956ffae8ce824614dd8276f699e909b77fffc980089a61db0732f9a2622 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8d23314f588a573519ab88c332e94c927f870810 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 8d23314f588a573519ab88c332e94c927f870810: net/socket.c:1128: undefined reference to `wext_handle_ioctl' net/socket.c:3397: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:346: undefined reference to `wext_proc_exit' net/core/net-procfs.c:330: undefined reference to `wext_proc_init' minimized to 47 configs; suspects: [HID_ZEROPLUS 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 X86_X32 ZEROPLUS_FF] disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing current HEAD ba8b8b19339409d005e0b71075309daf1bbbcbb6 testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5817855c442e67614487a58433e6fd33593af8d89d6f8ac5a2ffa8e95024123c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in current_umask representative crash: BUG: unable to handle kernel NULL pointer dereference in current_umask, types: [UNKNOWN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h58m4.583390416s (build: 1h18m31.027693827s, test: 37m49.078016724s) crash still not fixed or there were kernel test errors commit msg: Revert "can: statistics: use atomic access in hot path" crash: BUG: unable to handle kernel NULL pointer dereference in current_umask EXT4-fs error (device loop0): ext4_lookup:1830: inode #15: comm syz-executor: iget: bad extra_isize 65531 (inode size 512) EXT4-fs error (device loop0): ext4_lookup:1830: inode #15: comm syz-executor: iget: bad extra_isize 65531 (inode size 512) BUG: kernel NULL pointer dereference, address: 000000000000000c #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 467 Comm: syz-executor Not tainted 5.10.236-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:current_umask+0x10/0x20 fs/fs_struct.c:158 Code: 00 00 00 88 87 8e 00 00 00 8b 46 0c 89 47 0c 8b 76 48 e8 a3 fa fd ff 5d c3 cc 65 48 8b 04 25 00 ae 01 00 48 8b 80 b0 07 00 00 <8b> 40 0c c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 55 RSP: 0018:ffffc90000517a58 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8881105373c8 RCX: ffffc90000517ac0 RDX: ffffc90000517ab8 RSI: 0000000000004000 RDI: ffff888116d3a500 RBP: ffffc90000517a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff888108da4b34 R12: 0000000000000000 R13: ffff888110531cc8 R14: ffffc90000517ac0 R15: ffffc90000517ab8 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000c CR3: 0000000002c0b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: posix_acl_create+0x35/0x40 fs/posix_acl.c:584 ext4_init_acl+0x31/0x160 fs/ext4/acl.c:279 __ext4_new_inode+0x140b/0x1590 fs/ext4/ialloc.c:1323 ext4_mknod+0x103/0x1b0 fs/ext4/namei.c:2858 vfs_mknod+0x1e0/0x2b0 fs/namei.c:3693 vfs_whiteout include/linux/fs.h:1872 [inline] ovl_do_whiteout fs/overlayfs/overlayfs.h:229 [inline] ovl_whiteout fs/overlayfs/dir.c:77 [inline] ovl_cleanup_and_whiteout+0x149/0x180 fs/overlayfs/dir.c:117 ovl_remove_and_whiteout fs/overlayfs/dir.c:795 [inline] ovl_do_remove+0x1cc/0x4f0 fs/overlayfs/dir.c:922 ovl_rmdir+0x11/0x20 fs/overlayfs/dir.c:956 vfs_rmdir.part.0+0x5a/0x170 fs/namei.c:3852 vfs_rmdir+0x33/0x40 fs/namei.c:3838 incfs_kill_sb+0x80/0x90 fs/incfs/vfs.c:1973 deactivate_locked_super+0x31/0xa0 fs/super.c:335 deactivate_super+0x3b/0x50 fs/super.c:366 cleanup_mnt+0x10e/0x160 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0x5c/0x90 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x31e/0xa70 kernel/exit.c:863 do_group_exit+0x36/0xa0 kernel/exit.c:985 __do_sys_exit_group kernel/exit.c:996 [inline] __se_sys_exit_group kernel/exit.c:994 [inline] __x64_sys_exit_group+0x13/0x20 kernel/exit.c:994 do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7efbff5d0ef9 Code: Unable to access opcode bytes at RIP 0x7efbff5d0ecf. RSP: 002b:00007ffc6c83a688 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007efbff643a39 RCX: 00007efbff5d0ef9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000075 R08: 00007ffc6c838425 R09: 00007ffc6c83b940 R10: 000000000000000b R11: 0000000000000246 R12: 00007ffc6c83b940 R13: 00007efbff643a14 R14: 000000000000d594 R15: 00007ffc6c83ca00 Modules linked in: CR2: 000000000000000c ---[ end trace 602bcc6c2c6b1cd8 ]--- RIP: 0010:current_umask+0x10/0x20 fs/fs_struct.c:158 Code: 00 00 00 88 87 8e 00 00 00 8b 46 0c 89 47 0c 8b 76 48 e8 a3 fa fd ff 5d c3 cc 65 48 8b 04 25 00 ae 01 00 48 8b 80 b0 07 00 00 <8b> 40 0c c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 55 RSP: 0018:ffffc90000517a58 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8881105373c8 RCX: ffffc90000517ac0 RDX: ffffc90000517ab8 RSI: 0000000000004000 RDI: ffff888116d3a500 RBP: ffffc90000517a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff888108da4b34 R12: 0000000000000000 R13: ffff888110531cc8 R14: ffffc90000517ac0 R15: ffffc90000517ab8 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000c CR3: 0000000002c0b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 88 87 8e 00 00 add %cl,0x8e87(%rax) 8: 00 8b 46 0c 89 47 add %cl,0x47890c46(%rbx) e: 0c 8b or $0x8b,%al 10: 76 48 jbe 0x5a 12: e8 a3 fa fd ff call 0xfffdfaba 17: 5d pop %rbp 18: c3 ret 19: cc int3 1a: 65 48 8b 04 25 00 ae mov %gs:0x1ae00,%rax 21: 01 00 23: 48 8b 80 b0 07 00 00 mov 0x7b0(%rax),%rax * 2a: 8b 40 0c mov 0xc(%rax),%eax <-- trapping instruction 2d: c3 ret 2e: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 35: 00 00 00 00 39: 90 nop 3a: 55 push %rbp 3b: 48 89 e5 mov %rsp,%rbp 3e: 41 55 push %r13