* Re: possible deadlock in get_user_pages_unlocked (2) [not found] <000000000000543e45058a3cf40b@google.com> @ 2019-06-05 1:16 ` syzbot 2019-06-10 19:06 ` [IMA] " Eric Biggers 0 siblings, 1 reply; 2+ messages in thread From: syzbot @ 2019-06-05 1:16 UTC (permalink / raw) To: akpm, aneesh.kumar, dan.j.williams, ira.weiny, jack, jhubbard, jmorris, keith.busch, linux-kernel, linux-mm, linux-security-module, richard.weiyang, rppt, serge, sfr, syzkaller-bugs, willy, zohar syzbot has bisected this bug to: commit 69d61f577d147b396be0991b2ac6f65057f7d445 Author: Mimi Zohar <zohar@linux.ibm.com> Date: Wed Apr 3 21:47:46 2019 +0000 ima: verify mprotect change is consistent with mmap policy bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1055a2f2a00000 start commit: 56b697c6 Add linux-next specific files for 20190604 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=1255a2f2a00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1455a2f2a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=4248d6bc70076f7d dashboard link: https://syzkaller.appspot.com/bug?extid=e1374b2ec8f6a25ab2e5 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165757eea00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10dd3e86a00000 Reported-by: syzbot+e1374b2ec8f6a25ab2e5@syzkaller.appspotmail.com Fixes: 69d61f577d14 ("ima: verify mprotect change is consistent with mmap policy") For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 2+ messages in thread
* [IMA] Re: possible deadlock in get_user_pages_unlocked (2) 2019-06-05 1:16 ` possible deadlock in get_user_pages_unlocked (2) syzbot @ 2019-06-10 19:06 ` Eric Biggers 0 siblings, 0 replies; 2+ messages in thread From: Eric Biggers @ 2019-06-10 19:06 UTC (permalink / raw) To: Mimi Zohar Cc: syzbot, akpm, aneesh.kumar, dan.j.williams, ira.weiny, jack, jhubbard, jmorris, keith.busch, linux-kernel, linux-mm, linux-security-module, richard.weiyang, rppt, serge, sfr, syzkaller-bugs, willy On Tue, Jun 04, 2019 at 06:16:00PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 69d61f577d147b396be0991b2ac6f65057f7d445 > Author: Mimi Zohar <zohar@linux.ibm.com> > Date: Wed Apr 3 21:47:46 2019 +0000 > > ima: verify mprotect change is consistent with mmap policy > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1055a2f2a00000 > start commit: 56b697c6 Add linux-next specific files for 20190604 > git tree: linux-next > final crash: https://syzkaller.appspot.com/x/report.txt?x=1255a2f2a00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=1455a2f2a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4248d6bc70076f7d > dashboard link: https://syzkaller.appspot.com/bug?extid=e1374b2ec8f6a25ab2e5 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165757eea00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10dd3e86a00000 > > Reported-by: syzbot+e1374b2ec8f6a25ab2e5@syzkaller.appspotmail.com > Fixes: 69d61f577d14 ("ima: verify mprotect change is consistent with mmap > policy") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > Hi Mimi, it seems your change to call ima_file_mmap() from security_file_mprotect() violates the locking order by taking i_rwsem while mmap_sem is held. - Eric ^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <000000000000543e45058a3cf40b@google.com>
2019-06-05 1:16 ` possible deadlock in get_user_pages_unlocked (2) syzbot
2019-06-10 19:06 ` [IMA] " Eric Biggers
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