From: Aurélien Aptel <aaptel@xxxxxxxx> Sent: Tuesday, November 10, 2020 4:03 PM > To: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>; linux-fsdevel@xxxxxxxxxxxxxxx > Cc: viro@xxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; pali@xxxxxxxxxx; dsterba@xxxxxxx; willy@xxxxxxxxxxxxx; > rdunlap@xxxxxxxxxxxxx; joe@xxxxxxxxxxx; mark@xxxxxxxxxxxxx; nborisov@xxxxxxxx; linux-ntfs-dev@xxxxxxxxxxxxxxxxxxxxx; > anton@xxxxxxxxxx; dan.carpenter@xxxxxxxxxx; hch@xxxxxx; ebiggers@xxxxxxxxxx; Konstantin Komarov > <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> > Subject: Re: [PATCH v12 00/10] NTFS read-write driver GPL implementation by Paragon Software > > Hi Konstantin, > > Have you looked at Eric Biggers last comments regarding KASAN and > lockdep? You can enable KASAN in menuconfig in Kernel hacking > Memory > debugging > KASAN. > > With v12 I'm still seeing the out-of-bound read and potential deadlock. > Hi Aurelien! Apologies for the delayed reply. Yes, we're looking into each comment received on the patches, and trying to take actions on each promptly. On the KASAN and lockdep issues: it took some time to figure out how to catch and debug these :) But now, some of the related issues are resolved. Please try out the v13. > > The bad read: > > [ 69.496132] BUG: KASAN: stack-out-of-bounds in hdr_insert_de+0x130/0x1b0 > [ 69.496137] Read of size 32 at addr ffff88800b4ffb48 by task ln/1246 > .... > [ 166.671509] do_syscall_64+0x33/0x40 > [ 166.671509] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 166.671509] RIP: 0033:0x7fe486a68204 > [ 166.671509] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 80 00 00 00 00 8b 05 aa d1 2c 00 48 63 ff 85 c0 75 13 b8 01 00 00 00 0f 05 > <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90 55 53 48 89 d5 48 89 f3 48 83 > [ 166.671509] RSP: 002b:00007ffd4b76fee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 > [ 166.671509] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe486a68204 > [ 166.671509] RDX: 0000000000000004 RSI: 000055b1dd9bb7a0 RDI: 0000000000000001 > [ 166.671509] RBP: 000055b1dd9bb7a0 R08: 000000000000000a R09: 0000000000000000 > [ 166.671509] R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000004 > > Cheers, > -- > Aurélien Aptel / SUSE Labs Samba Team > GPG: 1839 CB5F 9F5B FB9B AA97 8C99 03C8 A49B 521B D5D3 > SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg, DE > GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 247165 (AG München) Thanks!
