Messages in this thread | | | Date | Mon, 26 Feb 2024 05:19:20 -0800 | Subject | [syzbot] [mm?] WARNING in kunmap_local_indexed | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 70ff1fe626a1 Merge tag 'docs-6.8-fixes3' of git://git.lwn... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17130f4a180000 kernel config: https://syzkaller.appspot.com/x/.config?x=4cf52b43f46d820d dashboard link: https://syzkaller.appspot.com/bug?extid=691cb37358791bebebe6 compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm syz repro: https://syzkaller.appspot.com/x/repro.syz?x=151e4e54180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115b934a180000
Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-70ff1fe6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bc398db9fd8c/vmlinux-70ff1fe6.xz kernel image: https://storage.googleapis.com/syzbot-assets/6d3f8b72a671/zImage-70ff1fe6.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+691cb37358791bebebe6@syzkaller.appspotmail.com
------------[ cut here ]------------ WARNING: CPU: 1 PID: 2978 at mm/highmem.c:611 kunmap_local_indexed+0x210/0x228 mm/highmem.c:611 Modules linked in: Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 1 PID: 2978 Comm: syz-executor914 Not tainted 6.8.0-rc5-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81837b0c>] (dump_backtrace) from [<81837c08>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:82622dc4 r5:60000093 r4:81fbd4bc [<81837bf0>] (show_stack) from [<81855124>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81837bf0>] (show_stack) from [<81855124>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<818550dc>] (dump_stack_lvl) from [<81855148>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:82850d18 [<81855130>] (dump_stack) from [<818386b0>] (panic+0x120/0x378 kernel/panic.c:344) [<81838590>] (panic) from [<802439cc>] (check_panic_on_warn kernel/panic.c:237 [inline]) [<81838590>] (panic) from [<802439cc>] (print_tainted+0x0/0xa0 kernel/panic.c:232) r3:8260c484 r2:00000001 r1:81fa5e94 r0:81fadb60 r7:8046cfa0 [<80243958>] (check_panic_on_warn) from [<80243bc0>] (__warn+0x7c/0x180 kernel/panic.c:677) [<80243b44>] (__warn) from [<80243e3c>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:702) r8:00000009 r7:81fd3b7c r6:df961b84 r5:83668c00 r4:00000000 [<80243cc8>] (warn_slowpath_fmt) from [<8046cfa0>] (kunmap_local_indexed+0x210/0x228 mm/highmem.c:611) r10:200fb000 r9:ffeda7d8 r8:836c9830 r7:84151500 r6:00000003 r5:83668c00 r4:ffedc000 [<8046cd90>] (kunmap_local_indexed) from [<804d9c84>] (__kunmap_local include/linux/highmem-internal.h:94 [inline]) [<8046cd90>] (kunmap_local_indexed) from [<804d9c84>] (move_pages_pte mm/userfaultfd.c:1162 [inline]) [<8046cd90>] (kunmap_local_indexed) from [<804d9c84>] (move_pages+0x5a4/0x1050 mm/userfaultfd.c:1452) r7:84151500 r6:00000000 r5:00000000 r4:fffffffe [<804d96e0>] (move_pages) from [<80551f30>] (userfaultfd_move fs/userfaultfd.c:2047 [inline]) [<804d96e0>] (move_pages) from [<80551f30>] (userfaultfd_ioctl+0x117c/0x211c fs/userfaultfd.c:2169) r10:8415157c r9:00000000 r8:00000000 r7:00000001 r6:20000080 r5:84151500 r4:84468000 [<80550db4>] (userfaultfd_ioctl) from [<80502158>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80550db4>] (userfaultfd_ioctl) from [<80502158>] (do_vfs_ioctl fs/ioctl.c:831 [inline]) [<80550db4>] (userfaultfd_ioctl) from [<80502158>] (__do_sys_ioctl fs/ioctl.c:869 [inline]) [<80550db4>] (userfaultfd_ioctl) from [<80502158>] (sys_ioctl+0x118/0xb58 fs/ioctl.c:857) r10:83668c00 r9:00000003 r8:842e2900 r7:20000080 r6:842e2900 r5:00000000 r4:c028aa05 [<80502040>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xdf961fa8 to 0xdf961ff0) 1fa0: ffffffff 00000000 00000003 c028aa05 20000080 00000000 1fc0: ffffffff 00000000 0008e050 00000036 000f4240 00000000 00000001 00003a97 1fe0: 7ebe5c70 7ebe5c60 00010694 0002e7e0 r10:00000036 r9:83668c00 r8:80200288 r7:00000036 r6:0008e050 r5:00000000 r4:ffffffff Rebooting in 86400 seconds..
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