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Sat, 22 Jul 2023 07:12:17 -0700 (PDT) Date: Sat, 22 Jul 2023 07:12:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000043f64060113f871@google.com> Subject: [syzbot] [mm?] BUG: soft lockup in generic_file_write_iter (2) From: syzbot To: brauner@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 1A4E14001B X-Stat-Signature: 9myeer33kuywt9e5zrru416tz8aji3uu X-Rspam-User: X-HE-Tag: 1690035137-963245 X-HE-Meta: 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 HhTGlfFg 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 0c/idwxb IVzgYDQzWjUI5eSDUlQJKghlEcw5z/v/Vvn8hY/Yqfazu2iR5IByLH7zk9ZXWzGwSvH13XA6R8WTqZUpnFyzbxO7sZ/QemNaWH9cxwHdve0oIX40tcxhRZqFOTiZ58i3XvqUlfbpORh4vVSEcVkbtRwiRQUIylEX X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following issue on: HEAD commit: 1a0beef98b58 Merge tag 'tpmdd-v6.4-rc1' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1744b894280000 kernel config: https://syzkaller.appspot.com/x/.config?x=3aa4ca13c88f2286 dashboard link: https://syzkaller.appspot.com/bug?extid=3b5bce3e397a2c9dcac6 compiler: aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3b5bce3e397a2c9dcac6@syzkaller.appspotmail.com watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:3202] Modules linked in: irq event stamp: 50116 hardirqs last enabled at (50115): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (50115): [] exit_to_kernel_mode+0x38/0x120 arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (50116): [] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline] hardirqs last disabled at (50116): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486 softirqs last enabled at (50020): [] _stext+0x80c/0xd70 softirqs last disabled at (49871): [] ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:80 CPU: 1 PID: 3202 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-00113-g1a0beef98b58 #0 Hardware name: linux,dummy-virt (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __arch_copy_from_user+0x1b0/0x230 arch/arm64/lib/copy_template.S:164 lr : copyin lib/iov_iter.c:183 [inline] lr : copyin+0xb8/0x118 lib/iov_iter.c:175 sp : ffff8000192a7840 x29: ffff8000192a7840 x28: ffff8000192a7c30 x27: ffff80000dddb378 x26: 0000000000001000 x25: 0000000040000000 x24: ffff000006324000 x23: 0000ffff99400000 x22: 0000ffff99454000 x21: ffff000006324000 x20: 0000ffff99454000 x19: 0000000000001000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff99454000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : ffff000006324d80 x5 : ffff000006325000 x4 : 0000000000000000 x3 : ffff80000910e070 x2 : 0000000000000200 x1 : 0000ffff99454dc0 x0 : ffff000006324000 Call trace: __arch_copy_from_user+0x1b0/0x230 arch/arm64/lib/copy_template.S:158 copy_page_from_iter_atomic+0x33c/0xe5c lib/iov_iter.c:815 generic_perform_write+0x218/0x3ec mm/filemap.c:3934 __generic_file_write_iter+0x1e8/0x3a0 mm/filemap.c:4054 generic_file_write_iter+0xc0/0x294 mm/filemap.c:4086 call_write_iter include/linux/fs.h:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x4c8/0x740 fs/read_write.c:584 ksys_write+0xec/0x1d0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x6c/0x9c fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x50/0x124 arch/arm64/kernel/syscall.c:193 el0_svc+0x54/0x140 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0xb8/0xbc arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 --- 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@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup