syzbot


WARNING in kunmap_local_indexed

Status: upstream: reported C repro on 2024/02/26 13:19
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+691cb37358791bebebe6@syzkaller.appspotmail.com
First crash: 531d, last: 6d17h
Discussions (9)
Title Replies (including bot) Last reply
[syzbot] Monthly mm report (Jul 2025) 0 (1) 2025/07/14 07:23
[syzbot] Monthly mm report (Jun 2025) 0 (1) 2025/06/13 12:25
[syzbot] Monthly mm report (May 2025) 0 (1) 2025/05/12 13:34
[syzbot] Monthly mm report (Aug 2024) 0 (1) 2024/08/02 16:15
[syzbot] Monthly mm report (Jul 2024) 0 (1) 2024/07/01 10:28
[syzbot] Monthly mm report (May 2024) 0 (1) 2024/05/31 06:48
[syzbot] Monthly mm report (Apr 2024) 0 (1) 2024/04/29 12:35
[syzbot] Monthly mm report (Mar 2024) 0 (1) 2024/03/19 21:40
[syzbot] [mm?] WARNING in kunmap_local_indexed 0 (1) 2024/02/26 13:19
Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/03/03 11:01 34m retest repro upstream error
2025/03/03 09:17 34m retest repro upstream error
2024/12/23 09:41 1h15m retest repro upstream error
2024/12/23 08:42 34m retest repro upstream error
2024/10/14 09:30 10m retest repro upstream report log
2024/10/14 08:32 9m retest repro upstream report log
2024/08/05 08:15 49m retest repro upstream report log
2024/08/05 08:15 16m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3105 at mm/highmem.c:622 kunmap_local_indexed+0x210/0x228 mm/highmem.c:622
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 3105 Comm: syz-executor699 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Call trace: 
[<802019e4>] (dump_backtrace) from [<80201ae0>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:828227fc r5:00000000 r4:82257c34
[<80201ac8>] (show_stack) from [<80220020>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201ac8>] (show_stack) from [<80220020>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<8021ffcc>] (dump_stack_lvl) from [<80220060>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82a70d4c
[<80220048>] (dump_stack) from [<802025f8>] (panic+0x120/0x374 kernel/panic.c:354)
[<802024d8>] (panic) from [<802619e8>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<802024d8>] (panic) from [<802619e8>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8280c604 r2:00000001 r1:8223e7fc r0:822462fc
 r7:804c6318
[<80261974>] (check_panic_on_warn) from [<80261b4c>] (__warn+0x80/0x188 kernel/panic.c:749)
[<80261acc>] (__warn) from [<80261dcc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:776)
 r8:00000009 r7:82271710 r6:df9add1c r5:84220c00 r4:00000000
[<80261c58>] (warn_slowpath_fmt) from [<804c6318>] (kunmap_local_indexed+0x210/0x228 mm/highmem.c:622)
 r10:00000000 r9:debcbe60 r8:deb6ca80 r7:00a00000 r6:00000003 r5:84220c00
 r4:ffefd000
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (__kunmap_local include/linux/highmem-internal.h:94 [inline])
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (move_pages_pte mm/userfaultfd.c:1420 [inline])
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (move_pages+0xb60/0x18d4 mm/userfaultfd.c:1831)
 r7:00a00000 r6:00000000 r5:84952c94 r4:8460d200
[<8053f44c>] (move_pages) from [<805c1830>] (userfaultfd_move fs/userfaultfd.c:1898 [inline])
[<8053f44c>] (move_pages) from [<805c1830>] (userfaultfd_ioctl+0xf6c/0x20c0 fs/userfaultfd.c:2021)
 r10:8460d200 r9:df9ade98 r8:21000000 r7:00000001 r6:00000000 r5:20000040
 r4:84920000
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (do_vfs_ioctl fs/ioctl.c:860 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (__do_sys_ioctl fs/ioctl.c:904 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (sys_ioctl+0x138/0xd84 fs/ioctl.c:892)
 r10:84220c00 r9:00000003 r8:84499480 r7:20000040 r6:84499480 r5:00000000
 r4:c028aa05
[<8056b3f8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf9adfa8 to 0xdf9adff0)
dfa0:                   ffffffff 00000000 00000003 c028aa05 20000040 00000000
dfc0: ffffffff 00000000 0008e050 00000036 20ffd000 00000000 20000000 0008a270
dfe0: 7ea54c70 7ea54c60 00010694 0002e7e0
 r10:00000036 r9:84220c00 r8:8020029c r7:00000036 r6:0008e050 r5:00000000
 r4:ffffffff
Rebooting in 86400 seconds..

Crashes (2431):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/08 00:42 upstream 707df3375124 dbf35fa1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/06/05 08:20 upstream 32f88d65f01b e1e2c66e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/02/26 07:15 upstream 70ff1fe626a1 8d446f15 .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/31 02:37 upstream 4b290aae788e f8f2b4da .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/31 02:10 upstream 4b290aae788e f8f2b4da .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/31 00:06 upstream 4b290aae788e f8f2b4da .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/30 12:31 upstream 14bed9bc81ba f8f2b4da .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/29 21:49 upstream 86aa72182095 ba28e0a8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/29 20:21 upstream 86aa72182095 ba28e0a8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/29 09:33 upstream 283564a43383 c4a95487 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/28 21:50 upstream 038d61fd6422 6654ea9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/28 20:43 upstream 038d61fd6422 6654ea9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/28 07:41 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/28 05:41 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 19:48 upstream ec2df4364666 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 17:57 upstream ec2df4364666 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 15:24 upstream ec2df4364666 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 03:55 upstream 302f88ff3584 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 02:27 upstream 302f88ff3584 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/27 01:47 upstream 302f88ff3584 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/26 13:35 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/26 12:09 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/26 12:09 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/26 09:57 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/25 23:11 upstream 2942242dde89 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/25 13:07 upstream 94ce1ac2c9b4 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/25 12:06 upstream 94ce1ac2c9b4 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/24 21:32 upstream 25fae0b93d1d 65d60d73 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/24 21:29 upstream 25fae0b93d1d 65d60d73 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/24 11:51 upstream f9af7b5d9349 0c1d6ded .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/24 10:26 upstream f9af7b5d9349 0c1d6ded .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/23 09:16 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/23 08:36 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/23 07:26 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 20:54 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 19:54 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 19:51 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 18:50 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 08:49 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/22 06:40 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/21 17:25 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/21 17:11 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/21 16:03 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/21 05:39 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/07/21 03:42 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/02/22 13:12 upstream 39133352cbed 345111b5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
* Struck through repros no longer work on HEAD.