syzbot


WARNING in __fortify_report

Status: upstream: reported C repro on 2024/05/23 06:29
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+50835f73143cc2905b9e@syzkaller.appspotmail.com
Fix commit: ext4: use memtostr_pad() for s_volume_name
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing on: [ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-net-next-test-gce ci2-upstream-usb]
First crash: 59d, last: 22d
Discussions (4)
Title Replies (including bot) Last reply
[PATCH v2] Fix WARNING in __ext4_ioctl 3 (3) 2024/07/11 02:42
[PATCH] ext4: Use memtostr_pad() for s_volume_name 2 (2) 2024/07/11 02:35
[syzbot] Monthly ext4 report (Jun 2024) 0 (1) 2024/06/14 08:14
[syzbot] [ext4?] WARNING in __fortify_report 3 (4) 2024/05/25 04:11
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/07/09 20:34 10m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3004 at lib/string_helpers.c:1029 __fortify_report+0x6c/0x74 lib/string_helpers.c:1029
strnlen: detected buffer overflow: 17 byte read of buffer size 16
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 3004 Comm: syz-executor296 Not tainted 6.9.0-syzkaller #0
Hardware name: ARM-Versatile Express
Call trace: 
[<818df678>] (dump_backtrace) from [<818df774>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622e04 r5:00000000 r4:81fe2534
[<818df75c>] (show_stack) from [<818fcdd8>] (__dump_stack lib/dump_stack.c:88 [inline])
[<818df75c>] (show_stack) from [<818fcdd8>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<818fcd84>] (dump_stack_lvl) from [<818fce18>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:82860d18
[<818fce00>] (dump_stack) from [<818e021c>] (panic+0x120/0x358 kernel/panic.c:347)
[<818e00fc>] (panic) from [<80243d54>] (check_panic_on_warn kernel/panic.c:240 [inline])
[<818e00fc>] (panic) from [<80243d54>] (print_tainted+0x0/0xa0 kernel/panic.c:235)
 r3:8260c5c4 r2:00000001 r1:81fcb130 r0:81fd2d44
 r7:8080fe7c
[<80243ce0>] (check_panic_on_warn) from [<80243f48>] (__warn+0x7c/0x180 kernel/panic.c:693)
[<80243ecc>] (__warn) from [<80244234>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:726)
 r8:00000009 r7:8202fe0c r6:df969db4 r5:836e6c00 r4:00000000
[<80244050>] (warn_slowpath_fmt) from [<8080fe7c>] (__fortify_report+0x6c/0x74 lib/string_helpers.c:1029)
 r10:8271c1c8 r9:00000005 r8:df969ec3 r7:8372e000 r6:00000000 r5:836be478
 r4:82e27000
[<8080fe10>] (__fortify_report) from [<818e9a40>] (__fortify_panic+0x10/0x14 lib/string_helpers.c:1036)
[<818e9a30>] (__fortify_panic) from [<8062a3b0>] (strnlen include/linux/fortify-string.h:221 [inline])
[<818e9a30>] (__fortify_panic) from [<8062a3b0>] (sized_strscpy include/linux/fortify-string.h:295 [inline])
[<818e9a30>] (__fortify_panic) from [<8062a3b0>] (ext4_ioctl_getlabel fs/ext4/ioctl.c:1154 [inline])
[<818e9a30>] (__fortify_panic) from [<8062a3b0>] (ext4_fileattr_get+0x0/0x78 fs/ext4/ioctl.c:1609)
[<8062829c>] (__ext4_ioctl) from [<8062aaac>] (ext4_ioctl+0x10/0x14 fs/ext4/ioctl.c:1626)
 r10:836e6c00 r9:00000005 r8:845e7900 r7:00000000 r6:845e7900 r5:00000000
 r4:81009431
[<8062aa9c>] (ext4_ioctl) from [<80518930>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<8062aa9c>] (ext4_ioctl) from [<80518930>] (do_vfs_ioctl fs/ioctl.c:861 [inline])
[<8062aa9c>] (ext4_ioctl) from [<80518930>] (__do_sys_ioctl fs/ioctl.c:905 [inline])
[<8062aa9c>] (ext4_ioctl) from [<80518930>] (sys_ioctl+0x134/0xda4 fs/ioctl.c:893)
[<805187fc>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf969fa8 to 0xdf969ff0)
9fa0:                   00000000 00000000 00000005 81009431 00000000 00000000
9fc0: 00000000 00000000 0008e060 00000036 000f4240 00000000 00000001 00003a97
9fe0: 7e98ac70 7e98ac60 00010764 0002e8c0
 r10:00000036 r9:836e6c00 r8:8020029c r7:00000036 r6:0008e060 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..

Crashes (251):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/19 10:54 upstream 0450d2083be6 c0f1611a .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/04 09:03 upstream f06ce441457d a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __fortify_report
2024/05/28 21:32 upstream e0cce98fe279 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in __fortify_report
2024/06/25 20:34 upstream 55027e689933 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __fortify_report
2024/06/23 06:40 upstream 563a50672d8a c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __fortify_report
2024/06/20 08:02 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __fortify_report
2024/06/04 05:03 upstream f06ce441457d c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __fortify_report
2024/06/14 07:14 upstream d20f6b3d747c a9616ff5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/13 16:50 upstream 2ccbdf43d5e7 2a27d56f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/13 16:31 upstream 2ccbdf43d5e7 2a27d56f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/12 22:24 upstream cea2a26553ac 2aa5052f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/12 15:18 upstream 2ef5971ff345 f815599d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/12 11:40 upstream 2ef5971ff345 f815599d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/12 04:23 upstream 2ef5971ff345 4d75f4f7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/11 20:17 upstream 83a7eefedc9b 4d75f4f7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/11 10:15 upstream 83a7eefedc9b b7d9eb04 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/11 05:07 upstream 83a7eefedc9b b7d9eb04 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/10 20:44 upstream 83a7eefedc9b 048c640a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/10 16:04 upstream 83a7eefedc9b 048c640a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/10 05:53 upstream 83a7eefedc9b 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/09 22:28 upstream 771ed66105de 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/09 20:21 upstream 771ed66105de 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/09 02:47 upstream 061d1af7b030 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/08 20:02 upstream dc772f8237f9 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/08 20:02 upstream dc772f8237f9 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/08 12:22 upstream dc772f8237f9 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/08 05:54 upstream 96e09b8f8166 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/08 00:33 upstream 96e09b8f8166 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/07 19:44 upstream 8a92980606e3 82c05ab8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/07 07:57 upstream 8a92980606e3 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/07 03:09 upstream 8a92980606e3 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/06 17:47 upstream 2df0193e62cf 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/06 14:23 upstream 2df0193e62cf 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/06 05:29 upstream 71d7b52cc33b 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/06 00:59 upstream 71d7b52cc33b 121701b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 21:32 upstream 71d7b52cc33b 32d786e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 18:47 upstream 71d7b52cc33b 32d786e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 11:57 upstream 32f88d65f01b 32d786e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 10:57 upstream 32f88d65f01b 32d786e7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 03:23 upstream 32f88d65f01b e1e2c66e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/05 03:18 upstream 32f88d65f01b e1e2c66e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/04 16:45 upstream 2ab795141095 485bfe09 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/04 03:21 upstream f06ce441457d a1feae05 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/03 16:05 upstream c3f38fa61af7 289d9bef .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/03 13:34 upstream c3f38fa61af7 289d9bef .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
2024/06/03 11:54 upstream c3f38fa61af7 289d9bef .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in __fortify_report
* Struck through repros no longer work on HEAD.