* Re: KASAN: use-after-free Read in ext4_xattr_set_entry (2) [not found] <000000000000c71dcf0579b0553f@google.com> @ 2019-12-15 1:27 ` syzbot 2019-12-15 6:30 ` Theodore Y. Ts'o 0 siblings, 1 reply; 4+ messages in thread From: syzbot @ 2019-12-15 1:27 UTC (permalink / raw) To: a, adilger.kernel, afd, b.a.t.m.a.n, chris, davem, linux-ext4, linux-kernel, mareklindner, netdev, pali.rohar, sre, sw, syzkaller-bugs, tytso syzbot has bisected this bug to: commit 8835cae5f2abd7f7a3143afe357f416aff5517a4 Author: Chris Lapa <chris@lapa.com.au> Date: Wed Jan 11 01:44:47 2017 +0000 power: supply: bq27xxx: adds specific support for bq27520-g4 revision. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16661f41e00000 start commit: ae4b064e Merge tag 'afs-fixes-20191211' of git://git.kerne.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=15661f41e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11661f41e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=79f79de2a27d3e3d dashboard link: https://syzkaller.appspot.com/bug?extid=4a39a025912b265cacef syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ec1332e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=163455dee00000 Reported-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com Fixes: 8835cae5f2ab ("power: supply: bq27xxx: adds specific support for bq27520-g4 revision.") For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in ext4_xattr_set_entry (2) 2019-12-15 1:27 ` KASAN: use-after-free Read in ext4_xattr_set_entry (2) syzbot @ 2019-12-15 6:30 ` Theodore Y. Ts'o 2019-12-15 6:52 ` syzbot 2019-12-16 8:09 ` Dmitry Vyukov 0 siblings, 2 replies; 4+ messages in thread From: Theodore Y. Ts'o @ 2019-12-15 6:30 UTC (permalink / raw) To: syzbot Cc: a, adilger.kernel, afd, b.a.t.m.a.n, chris, davem, linux-ext4, linux-kernel, mareklindner, netdev, pali.rohar, sre, sw, syzkaller-bugs On Sat, Dec 14, 2019 at 05:27:00PM -0800, syzbot wrote: > syzbot has bisected this bug to: > > commit 8835cae5f2abd7f7a3143afe357f416aff5517a4 > Author: Chris Lapa <chris@lapa.com.au> > Date: Wed Jan 11 01:44:47 2017 +0000 > > power: supply: bq27xxx: adds specific support for bq27520-g4 revision. This is pretty clearly nonsense. However let's try this fix: #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git master From 9c962de70a52e0b24fba00ee7b8707964d3d1e37 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o <tytso@mit.edu> Date: Sun, 15 Dec 2019 01:09:03 -0500 Subject: [PATCH] ext4: validate the debug_want_extra_isize mount option at parse time Instead of setting s_want_extra_size and then making sure that it is a valid value afterwards, validate the field before we set it. This avoids races and other problems when remounting the file system. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reported-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com --- fs/ext4/super.c | 143 +++++++++++++++++++++++------------------------- 1 file changed, 69 insertions(+), 74 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b205112ca051..46b6d5b150ac 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1886,6 +1886,13 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, } sbi->s_commit_interval = HZ * arg; } else if (token == Opt_debug_want_extra_isize) { + if ((arg & 1) || + (arg < 4) || + (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { + ext4_msg(sb, KERN_ERR, + "Invalid want_extra_isize %d", arg); + return -1; + } sbi->s_want_extra_isize = arg; } else if (token == Opt_max_batch_time) { sbi->s_max_batch_time = arg; @@ -3540,40 +3547,6 @@ int ext4_calculate_overhead(struct super_block *sb) return 0; } -static void ext4_clamp_want_extra_isize(struct super_block *sb) -{ - struct ext4_sb_info *sbi = EXT4_SB(sb); - struct ext4_super_block *es = sbi->s_es; - unsigned def_extra_isize = sizeof(struct ext4_inode) - - EXT4_GOOD_OLD_INODE_SIZE; - - if (sbi->s_inode_size == EXT4_GOOD_OLD_INODE_SIZE) { - sbi->s_want_extra_isize = 0; - return; - } - if (sbi->s_want_extra_isize < 4) { - sbi->s_want_extra_isize = def_extra_isize; - if (ext4_has_feature_extra_isize(sb)) { - if (sbi->s_want_extra_isize < - le16_to_cpu(es->s_want_extra_isize)) - sbi->s_want_extra_isize = - le16_to_cpu(es->s_want_extra_isize); - if (sbi->s_want_extra_isize < - le16_to_cpu(es->s_min_extra_isize)) - sbi->s_want_extra_isize = - le16_to_cpu(es->s_min_extra_isize); - } - } - /* Check if enough inode space is available */ - if ((sbi->s_want_extra_isize > sbi->s_inode_size) || - (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > - sbi->s_inode_size)) { - sbi->s_want_extra_isize = def_extra_isize; - ext4_msg(sb, KERN_INFO, - "required extra inode space not available"); - } -} - static void ext4_set_resv_clusters(struct super_block *sb) { ext4_fsblk_t resv_clusters; @@ -3781,6 +3754,68 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; + if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { + sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; + sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; + } else { + sbi->s_inode_size = le16_to_cpu(es->s_inode_size); + sbi->s_first_ino = le32_to_cpu(es->s_first_ino); + if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { + ext4_msg(sb, KERN_ERR, "invalid first ino: %u", + sbi->s_first_ino); + goto failed_mount; + } + if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || + (!is_power_of_2(sbi->s_inode_size)) || + (sbi->s_inode_size > blocksize)) { + ext4_msg(sb, KERN_ERR, + "unsupported inode size: %d", + sbi->s_inode_size); + goto failed_mount; + } + /* + * i_atime_extra is the last extra field available for + * [acm]times in struct ext4_inode. Checking for that + * field should suffice to ensure we have extra space + * for all three. + */ + if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + + sizeof(((struct ext4_inode *)0)->i_atime_extra)) { + sb->s_time_gran = 1; + sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; + } else { + sb->s_time_gran = NSEC_PER_SEC; + sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; + } + sb->s_time_min = EXT4_TIMESTAMP_MIN; + } + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { + sbi->s_want_extra_isize = sizeof(struct ext4_inode) - + EXT4_GOOD_OLD_INODE_SIZE; + if (ext4_has_feature_extra_isize(sb)) { + unsigned v, max = (sbi->s_inode_size - + EXT4_GOOD_OLD_INODE_SIZE); + + v = le16_to_cpu(es->s_want_extra_isize); + if (v > max) { + ext4_msg(sb, KERN_ERR, + "bad s_want_extra_isize: %d", v); + goto failed_mount; + } + if (sbi->s_want_extra_isize < v) + sbi->s_want_extra_isize = v; + + v = le16_to_cpu(es->s_min_extra_isize); + if (v > max) { + ext4_msg(sb, KERN_ERR, + "bad s_min_extra_isize: %d", v); + goto failed_mount; + } + if (sbi->s_want_extra_isize < v) + sbi->s_want_extra_isize = v; + } + } + if (sbi->s_es->s_mount_opts[0]) { char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, sizeof(sbi->s_es->s_mount_opts), @@ -4019,42 +4054,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) has_huge_files); sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); - if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { - sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; - sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; - } else { - sbi->s_inode_size = le16_to_cpu(es->s_inode_size); - sbi->s_first_ino = le32_to_cpu(es->s_first_ino); - if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { - ext4_msg(sb, KERN_ERR, "invalid first ino: %u", - sbi->s_first_ino); - goto failed_mount; - } - if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || - (!is_power_of_2(sbi->s_inode_size)) || - (sbi->s_inode_size > blocksize)) { - ext4_msg(sb, KERN_ERR, - "unsupported inode size: %d", - sbi->s_inode_size); - goto failed_mount; - } - /* - * i_atime_extra is the last extra field available for [acm]times in - * struct ext4_inode. Checking for that field should suffice to ensure - * we have extra space for all three. - */ - if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + - sizeof(((struct ext4_inode *)0)->i_atime_extra)) { - sb->s_time_gran = 1; - sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; - } else { - sb->s_time_gran = NSEC_PER_SEC; - sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; - } - - sb->s_time_min = EXT4_TIMESTAMP_MIN; - } - sbi->s_desc_size = le16_to_cpu(es->s_desc_size); if (ext4_has_feature_64bit(sb)) { if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || @@ -4503,8 +4502,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } else if (ret) goto failed_mount4a; - ext4_clamp_want_extra_isize(sb); - ext4_set_resv_clusters(sb); err = ext4_setup_system_zone(sb); @@ -5292,8 +5289,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) goto restore_opts; } - ext4_clamp_want_extra_isize(sb); - if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ test_opt(sb, JOURNAL_CHECKSUM)) { ext4_msg(sb, KERN_ERR, "changing journal_checksum " -- 2.24.1 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in ext4_xattr_set_entry (2) 2019-12-15 6:30 ` Theodore Y. Ts'o @ 2019-12-15 6:52 ` syzbot 2019-12-16 8:09 ` Dmitry Vyukov 1 sibling, 0 replies; 4+ messages in thread From: syzbot @ 2019-12-15 6:52 UTC (permalink / raw) To: a, adilger.kernel, afd, b.a.t.m.a.n, chris, davem, linux-ext4, linux-kernel, mareklindner, netdev, pali.rohar, sre, sw, syzkaller-bugs, tytso Hello, syzbot has tested the proposed patch and the reproducer did not trigger crash: Reported-and-tested-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com Tested on: commit: dfdeeb41 Merge branch 'tt/misc' into dev git tree: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git master kernel config: https://syzkaller.appspot.com/x/.config?x=be3b077056d26622 dashboard link: https://syzkaller.appspot.com/bug?extid=4a39a025912b265cacef compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=11b02546e00000 Note: testing is done by a robot and is best-effort only. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: use-after-free Read in ext4_xattr_set_entry (2) 2019-12-15 6:30 ` Theodore Y. Ts'o 2019-12-15 6:52 ` syzbot @ 2019-12-16 8:09 ` Dmitry Vyukov 1 sibling, 0 replies; 4+ messages in thread From: Dmitry Vyukov @ 2019-12-16 8:09 UTC (permalink / raw) To: Theodore Y. Ts'o Cc: syzbot, a, Andreas Dilger, afd, b.a.t.m.a.n, chris, David Miller, linux-ext4, LKML, mareklindner, netdev, Pali Rohár, sre, sw, syzkaller-bugs On Sun, Dec 15, 2019 at 7:30 AM Theodore Y. Ts'o <tytso@mit.edu> wrote: > > On Sat, Dec 14, 2019 at 05:27:00PM -0800, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit 8835cae5f2abd7f7a3143afe357f416aff5517a4 > > Author: Chris Lapa <chris@lapa.com.au> > > Date: Wed Jan 11 01:44:47 2017 +0000 > > > > power: supply: bq27xxx: adds specific support for bq27520-g4 revision. > > This is pretty clearly nonsense. Agree. FTR, it seems that bisection was first diverged by this kernel bug: testing commit 8835cae5f2abd7f7a3143afe357f416aff5517a4 with gcc (GCC) 5.5.0 run #0: crashed: WARNING in batadv_mcast_mla_update on top of this non-deterministic kernel build bug kicked in to prevent detection of "culprit does not affect build": culprit signature: 2aca06cd9a4175f124f866fe66467cfa96c0bf2a parent signature: 8a8dd9ca5726f129b6d36eb6e1f3b78cc7c18b31 > However let's try this fix: > > #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git master > > From 9c962de70a52e0b24fba00ee7b8707964d3d1e37 Mon Sep 17 00:00:00 2001 > From: Theodore Ts'o <tytso@mit.edu> > Date: Sun, 15 Dec 2019 01:09:03 -0500 > Subject: [PATCH] ext4: validate the debug_want_extra_isize mount option at parse time > > Instead of setting s_want_extra_size and then making sure that it is a > valid value afterwards, validate the field before we set it. This > avoids races and other problems when remounting the file system. > > Signed-off-by: Theodore Ts'o <tytso@mit.edu> > Reported-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com > --- > fs/ext4/super.c | 143 +++++++++++++++++++++++------------------------- > 1 file changed, 69 insertions(+), 74 deletions(-) > > diff --git a/fs/ext4/super.c b/fs/ext4/super.c > index b205112ca051..46b6d5b150ac 100644 > --- a/fs/ext4/super.c > +++ b/fs/ext4/super.c > @@ -1886,6 +1886,13 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, > } > sbi->s_commit_interval = HZ * arg; > } else if (token == Opt_debug_want_extra_isize) { > + if ((arg & 1) || > + (arg < 4) || > + (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { > + ext4_msg(sb, KERN_ERR, > + "Invalid want_extra_isize %d", arg); > + return -1; > + } > sbi->s_want_extra_isize = arg; > } else if (token == Opt_max_batch_time) { > sbi->s_max_batch_time = arg; > @@ -3540,40 +3547,6 @@ int ext4_calculate_overhead(struct super_block *sb) > return 0; > } > > -static void ext4_clamp_want_extra_isize(struct super_block *sb) > -{ > - struct ext4_sb_info *sbi = EXT4_SB(sb); > - struct ext4_super_block *es = sbi->s_es; > - unsigned def_extra_isize = sizeof(struct ext4_inode) - > - EXT4_GOOD_OLD_INODE_SIZE; > - > - if (sbi->s_inode_size == EXT4_GOOD_OLD_INODE_SIZE) { > - sbi->s_want_extra_isize = 0; > - return; > - } > - if (sbi->s_want_extra_isize < 4) { > - sbi->s_want_extra_isize = def_extra_isize; > - if (ext4_has_feature_extra_isize(sb)) { > - if (sbi->s_want_extra_isize < > - le16_to_cpu(es->s_want_extra_isize)) > - sbi->s_want_extra_isize = > - le16_to_cpu(es->s_want_extra_isize); > - if (sbi->s_want_extra_isize < > - le16_to_cpu(es->s_min_extra_isize)) > - sbi->s_want_extra_isize = > - le16_to_cpu(es->s_min_extra_isize); > - } > - } > - /* Check if enough inode space is available */ > - if ((sbi->s_want_extra_isize > sbi->s_inode_size) || > - (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > > - sbi->s_inode_size)) { > - sbi->s_want_extra_isize = def_extra_isize; > - ext4_msg(sb, KERN_INFO, > - "required extra inode space not available"); > - } > -} > - > static void ext4_set_resv_clusters(struct super_block *sb) > { > ext4_fsblk_t resv_clusters; > @@ -3781,6 +3754,68 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) > */ > sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; > > + if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { > + sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; > + sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; > + } else { > + sbi->s_inode_size = le16_to_cpu(es->s_inode_size); > + sbi->s_first_ino = le32_to_cpu(es->s_first_ino); > + if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { > + ext4_msg(sb, KERN_ERR, "invalid first ino: %u", > + sbi->s_first_ino); > + goto failed_mount; > + } > + if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || > + (!is_power_of_2(sbi->s_inode_size)) || > + (sbi->s_inode_size > blocksize)) { > + ext4_msg(sb, KERN_ERR, > + "unsupported inode size: %d", > + sbi->s_inode_size); > + goto failed_mount; > + } > + /* > + * i_atime_extra is the last extra field available for > + * [acm]times in struct ext4_inode. Checking for that > + * field should suffice to ensure we have extra space > + * for all three. > + */ > + if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + > + sizeof(((struct ext4_inode *)0)->i_atime_extra)) { > + sb->s_time_gran = 1; > + sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; > + } else { > + sb->s_time_gran = NSEC_PER_SEC; > + sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; > + } > + sb->s_time_min = EXT4_TIMESTAMP_MIN; > + } > + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { > + sbi->s_want_extra_isize = sizeof(struct ext4_inode) - > + EXT4_GOOD_OLD_INODE_SIZE; > + if (ext4_has_feature_extra_isize(sb)) { > + unsigned v, max = (sbi->s_inode_size - > + EXT4_GOOD_OLD_INODE_SIZE); > + > + v = le16_to_cpu(es->s_want_extra_isize); > + if (v > max) { > + ext4_msg(sb, KERN_ERR, > + "bad s_want_extra_isize: %d", v); > + goto failed_mount; > + } > + if (sbi->s_want_extra_isize < v) > + sbi->s_want_extra_isize = v; > + > + v = le16_to_cpu(es->s_min_extra_isize); > + if (v > max) { > + ext4_msg(sb, KERN_ERR, > + "bad s_min_extra_isize: %d", v); > + goto failed_mount; > + } > + if (sbi->s_want_extra_isize < v) > + sbi->s_want_extra_isize = v; > + } > + } > + > if (sbi->s_es->s_mount_opts[0]) { > char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, > sizeof(sbi->s_es->s_mount_opts), > @@ -4019,42 +4054,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) > has_huge_files); > sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); > > - if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { > - sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; > - sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; > - } else { > - sbi->s_inode_size = le16_to_cpu(es->s_inode_size); > - sbi->s_first_ino = le32_to_cpu(es->s_first_ino); > - if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { > - ext4_msg(sb, KERN_ERR, "invalid first ino: %u", > - sbi->s_first_ino); > - goto failed_mount; > - } > - if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || > - (!is_power_of_2(sbi->s_inode_size)) || > - (sbi->s_inode_size > blocksize)) { > - ext4_msg(sb, KERN_ERR, > - "unsupported inode size: %d", > - sbi->s_inode_size); > - goto failed_mount; > - } > - /* > - * i_atime_extra is the last extra field available for [acm]times in > - * struct ext4_inode. Checking for that field should suffice to ensure > - * we have extra space for all three. > - */ > - if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + > - sizeof(((struct ext4_inode *)0)->i_atime_extra)) { > - sb->s_time_gran = 1; > - sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; > - } else { > - sb->s_time_gran = NSEC_PER_SEC; > - sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; > - } > - > - sb->s_time_min = EXT4_TIMESTAMP_MIN; > - } > - > sbi->s_desc_size = le16_to_cpu(es->s_desc_size); > if (ext4_has_feature_64bit(sb)) { > if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || > @@ -4503,8 +4502,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) > } else if (ret) > goto failed_mount4a; > > - ext4_clamp_want_extra_isize(sb); > - > ext4_set_resv_clusters(sb); > > err = ext4_setup_system_zone(sb); > @@ -5292,8 +5289,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) > goto restore_opts; > } > > - ext4_clamp_want_extra_isize(sb); > - > if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ > test_opt(sb, JOURNAL_CHECKSUM)) { > ext4_msg(sb, KERN_ERR, "changing journal_checksum " > -- > 2.24.1 > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/20191215063020.GA11512%40mit.edu. ^ permalink raw reply [flat|nested] 4+ messages in thread
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2019-12-15 1:27 ` KASAN: use-after-free Read in ext4_xattr_set_entry (2) syzbot
2019-12-15 6:30 ` Theodore Y. Ts'o
2019-12-15 6:52 ` syzbot
2019-12-16 8:09 ` Dmitry Vyukov
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