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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738917960; bh=8PqG0V0qK1uhMTfMCudXyMiiT5+6sNXnEjnuEOkzSQc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SnVL/YRam4nU3SZCUSxXDdozqypWcROeHfW1cpkuloNMvVkN9f6qp4HoKwr67MP4u kwUDz/uPf+BAYG0YL9mgSHlW0vHqagzSa1M3Pjh/ihFnkmQ78wEC4sZrwluLOsMFso iKawD7AUtynVCNLJ8t99Ux9lxoCl26K9WnBPb6ozlcYn4Rh7sBe82i6DjdUA7ZuEmF 14P6W4t9/mK5VQu8dMZ9PGYUnP8OZ1D1SBVyRh6i8lNoS00KNcrmvJa9hgsQuDTz4q Hi9N2qRPsp0qpci9wUs34noIuxn0wL4apBxpUcP4ZNbY7zUJzuwd5clMQbIjAQZTJI SRhu6b9lRGZ4A== Date: Fri, 7 Feb 2025 09:45:55 +0100 From: Christian Brauner To: Andrew Morton Cc: syzbot , linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, linux-fsdevel@vger.kernel.org, Jens Axboe , Amir Goldstein Subject: Re: [syzbot] [mm?] WARNING in fsnotify_file_area_perm Message-ID: <20250207-teuer-viermal-9c60839ff221@brauner> References: <67a487f7.050a0220.19061f.05fc.GAE@google.com> <20250206165404.495fd127b4dc32a62574841a@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20250206165404.495fd127b4dc32a62574841a@linux-foundation.org> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 0D78340003 X-Stat-Signature: ztzzc347ompmdzeqaoxgumd1kmg43iz9 X-Rspam-User: X-HE-Tag: 1738917960-648851 X-HE-Meta: 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 N3Hj2NLh 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 ANY/N9sG TEVvvb2pBHk5f1t1bb0XKOOJw9ePpgk3b8RK8mwGtljZEApafQCUT9V9RpSKrmMpDC387Gd1vKF69f1CSZHBjRkvUwmRQKrIbJMpvMxax6Qai/6Vhk4ZEusACtJzNLoJsjBtncaA0cc9WmdduaFMvtllwi0VlyEhAm8WnyZ6rjM4Odu+PL7OCcpjM60mJOPK 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: List-Subscribe: List-Unsubscribe: On Thu, Feb 06, 2025 at 04:54:04PM -0800, Andrew Morton wrote: > > Thanks. Let me cc linux-fsdevel and a few others who might help with > this. Thanks! I already have a fix for this in vfs.fixes: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/commit/?h=vfs.fixes&id=b13036454697d83e53bf754efbcaaedf431b7a8a I'll get that out today. > > > On Thu, 06 Feb 2025 01:59:19 -0800 syzbot wrote: > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=135c1724580000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=d033b14aeef39158 > > dashboard link: https://syzkaller.appspot.com/bug?extid=7229071b47908b19d5b7 > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > Downloadable assets: > > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-69e858e0.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/a53b888c1f3f/vmlinux-69e858e0.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/6b5e17edafc0/bzImage-69e858e0.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+7229071b47908b19d5b7@syzkaller.appspotmail.com > > > > loop0: detected capacity change from 0 to 32768 > > XFS: ikeep mount option is deprecated. > > XFS (loop0): Mounting V5 Filesystem a2f82aab-77f8-4286-afd4-a8f747a74bab > > XFS (loop0): Ending clean mount > > XFS (loop0): Quotacheck needed: Please wait. > > XFS (loop0): Quotacheck: Done. > > ------------[ cut here ]------------ > > WARNING: CPU: 0 PID: 5321 at ./include/linux/fsnotify.h:145 fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 > > Modules linked in: > > CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0 > > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > > RIP: 0010:fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 > > Code: c3 cc cc cc cc e8 fb 8f c6 ff 49 83 ec 80 4c 89 e7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 9f 00 00 e8 dc 8f c6 ff 90 <0f> 0b 90 e9 0a ff ff ff 48 c7 c1 10 73 1b 90 80 e1 07 80 c1 03 38 > > RSP: 0018:ffffc9000d416320 EFLAGS: 00010283 > > RAX: ffffffff81f8dce4 RBX: 0000000000000001 RCX: 0000000000100000 > > RDX: ffffc9000e5c2000 RSI: 00000000000008fa RDI: 00000000000008fb > > RBP: 0000000000008000 R08: ffffffff81f8dbdc R09: 1ffff110087dca2e > > R10: dffffc0000000000 R11: ffffed10087dca2f R12: ffff888033d4b1c0 > > R13: 0000000000000010 R14: dffffc0000000000 R15: ffffc9000d416460 > > FS: 00007f5bca7346c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020000100 CR3: 0000000033fd2000 CR4: 0000000000352ef0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > > > filemap_fault+0x14a9/0x16c0 mm/filemap.c:3509 > > __do_fault+0x135/0x390 mm/memory.c:4977 > > do_read_fault mm/memory.c:5392 [inline] > > do_fault mm/memory.c:5526 [inline] > > do_pte_missing mm/memory.c:4047 [inline] > > handle_pte_fault mm/memory.c:5889 [inline] > > __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6032 > > handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6201 > > faultin_page mm/gup.c:1196 [inline] > > __get_user_pages+0x1a92/0x4140 mm/gup.c:1491 > > __get_user_pages_locked mm/gup.c:1757 [inline] > > __gup_longterm_locked+0xe64/0x17f0 mm/gup.c:2529 > > gup_fast_fallback+0x2266/0x29c0 mm/gup.c:3430 > > pin_user_pages_fast+0xcc/0x160 mm/gup.c:3536 > > iov_iter_extract_user_pages lib/iov_iter.c:1844 [inline] > > iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1907 > > __bio_iov_iter_get_pages block/bio.c:1181 [inline] > > bio_iov_iter_get_pages+0x4f1/0x1460 block/bio.c:1263 > > iomap_dio_bio_iter+0xc9c/0x1740 fs/iomap/direct-io.c:406 > > __iomap_dio_rw+0x13b7/0x25b0 fs/iomap/direct-io.c:703 > > iomap_dio_rw+0x46/0xa0 fs/iomap/direct-io.c:792 > > xfs_file_dio_write_unaligned+0x2ef/0x6f0 fs/xfs/xfs_file.c:692 > > xfs_file_dio_write fs/xfs/xfs_file.c:725 [inline] > > xfs_file_write_iter+0x5c6/0x720 fs/xfs/xfs_file.c:876 > > do_iter_readv_writev+0x71a/0x9d0 > > vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 > > do_pwritev fs/read_write.c:1146 [inline] > > __do_sys_pwritev2 fs/read_write.c:1204 [inline] > > __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > RIP: 0033:0x7f5bc998cda9 > > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007f5bca734038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 > > RAX: ffffffffffffffda RBX: 00007f5bc9ba5fa0 RCX: 00007f5bc998cda9 > > RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000007 > > RBP: 00007f5bc9a0e2a0 R08: 0000000000000000 R09: 0000000000000003 > > R10: 0000000000007c00 R11: 0000000000000246 R12: 0000000000000000 > > R13: 0000000000000000 R14: 00007f5bc9ba5fa0 R15: 00007fff90caf808 > > > > > > > > --- > > 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 report is already addressed, let syzbot know by replying with: > > #syz fix: exact-commit-title > > > > If you want to overwrite report's subsystems, reply with: > > #syz set subsystems: new-subsystem > > (See the list of subsystem names on the web dashboard) > > > > If the report is a duplicate of another one, reply with: > > #syz dup: exact-subject-of-another-report > > > > If you want to undo deduplication, reply with: > > #syz undup