Hello, syzbot found the following issue on: HEAD commit: 680fb5b009e8 Merge tag 'arm64-upstream' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=126f0865080000 kernel config: https://syzkaller.appspot.com/x/.config?x=4557ad2600fc45f4 dashboard link: https://syzkaller.appspot.com/bug?extid=1902c359bfcaf39c46f2 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10039fc3080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f4ebc3080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1902c359bfcaf39c46f2@xxxxxxxxxxxxxxxxxxxxxxxxx list_del corruption. prev->next should be ffff0000c74fd828, but was ffff80000d5c37a0. (prev=ffff80000d5c37a0) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:53! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3019 Comm: syz-executor150 Not tainted 5.19.0-rc8-syzkaller-01618-g680fb5b009e8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_del_entry_valid+0x94/0xa8 lib/list_debug.c:51 lr : __list_del_entry_valid+0x94/0xa8 lib/list_debug.c:51 sp : ffff80001317bc40 x29: ffff80001317bc40 x28: ffff0000c65f0000 x27: 0000000000000000 x26: 00000000000000c0 x25: ffff0000cae01828 x24: ffff0000c74fd000 x23: ffff80000d309368 x22: ffff8000093f7a24 x21: ffff80000d5c37a0 x20: 0000000000000000 x19: ffff0000c74fd000 x18: 0000000000000265 x17: ffff80000bfed6bc x16: ffff80000db3b658 x15: ffff0000c65f0000 x14: 0000000000000021 x13: 00000000ffffffff x12: ffff0000c65f0000 x11: ff808000081bf324 x10: 0000000000000000 x9 : bdc8aea51905dc00 x8 : bdc8aea51905dc00 x7 : ffff800008160c98 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefbecd0 x1 : 0000000100000000 x0 : 000000000000006d Call trace: __list_del_entry_valid+0x94/0xa8 lib/list_debug.c:51 __list_del_entry include/linux/list.h:134 [inline] list_del include/linux/list.h:148 [inline] efivar_entry_remove+0x4c/0xa4 drivers/firmware/efi/vars.c:539 efivarfs_destroy+0x20/0x5c fs/efivarfs/super.c:185 __efivar_entry_iter+0x94/0x100 drivers/firmware/efi/vars.c:1089 efivarfs_kill_sb+0x3c/0x4c fs/efivarfs/super.c:249 deactivate_locked_super+0x70/0xd4 fs/super.c:332 deactivate_super+0xb8/0xbc fs/super.c:363 cleanup_mnt+0x1a4/0x1e0 fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0xc4/0x208 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1d0 arch/arm64/kernel/signal.c:1117 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x14c arch/arm64/kernel/entry-common.c:625 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: 9001b300 912e7000 aa0803e3 94a6ef81 (d4210000) ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
