Hello,
syzbot found the following crash on:
HEAD commit: 5b14671b Merge tag 'fuse-update-5.8' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12a11ec1100000
kernel config: https://syzkaller.appspot.com/x/.config?x=d1ea633f7958e008
dashboard link: https://syzkaller.appspot.com/bug?extid=0113b9be6667b5b50840
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: [email protected]
BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6740
caller is ext4_mb_new_blocks+0xa77/0x3b30 fs/ext4/mballoc.c:4711
CPU: 0 PID: 6740 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
check_preemption_disabled lib/smp_processor_id.c:47 [inline]
debug_smp_processor_id.cold+0x88/0x9b lib/smp_processor_id.c:57
ext4_mb_new_blocks+0xa77/0x3b30 fs/ext4/mballoc.c:4711
ext4_ext_map_blocks+0x2044/0x3410 fs/ext4/extents.c:4244
ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
ext4_getblk+0xad/0x520 fs/ext4/inode.c:833
ext4_bread+0x7c/0x380 fs/ext4/inode.c:883
ext4_append+0x153/0x360 fs/ext4/namei.c:67
ext4_init_new_dir fs/ext4/namei.c:2757 [inline]
ext4_mkdir+0x5e0/0xdf0 fs/ext4/namei.c:2802
vfs_mkdir+0x419/0x690 fs/namei.c:3641
do_mkdirat+0x21e/0x280 fs/namei.c:3664
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x7f449ff49687
Code: Bad RIP value.
RSP: 002b:00007ffdd3b9fe58 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00005567752fd985 RCX: 00007f449ff49687
RDX: 00007ffdd3b9fd20 RSI: 00000000000001ed RDI: 00005567752fd985
RBP: 00007f449ff49680 R08: 0000000000000100 R09: 0000000000000000
R10: 00005567752fd980 R11: 0000000000000246 R12: 00000000000001ed
R13: 00007ffdd3b9ffe0 R14: 0000000000000000 R15: 0000000000000000
---
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On Tue, Jun 09, 2020 at 06:48:13PM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 5b14671b Merge tag 'fuse-update-5.8' of git://git.kernel.o..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12a11ec1100000
> kernel config: https://syzkaller.appspot.com/x/.config?x=d1ea633f7958e008
> dashboard link: https://syzkaller.appspot.com/bug?extid=0113b9be6667b5b50840
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: [email protected]
>
> BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6740
> caller is ext4_mb_new_blocks+0xa77/0x3b30 fs/ext4/mballoc.c:4711
> CPU: 0 PID: 6740 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Call Trace:
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x18f/0x20d lib/dump_stack.c:118
> check_preemption_disabled lib/smp_processor_id.c:47 [inline]
> debug_smp_processor_id.cold+0x88/0x9b lib/smp_processor_id.c:57
> ext4_mb_new_blocks+0xa77/0x3b30 fs/ext4/mballoc.c:4711
> ext4_ext_map_blocks+0x2044/0x3410 fs/ext4/extents.c:4244
> ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
> ext4_getblk+0xad/0x520 fs/ext4/inode.c:833
> ext4_bread+0x7c/0x380 fs/ext4/inode.c:883
> ext4_append+0x153/0x360 fs/ext4/namei.c:67
> ext4_init_new_dir fs/ext4/namei.c:2757 [inline]
> ext4_mkdir+0x5e0/0xdf0 fs/ext4/namei.c:2802
> vfs_mkdir+0x419/0x690 fs/namei.c:3641
> do_mkdirat+0x21e/0x280 fs/namei.c:3664
> do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
> entry_SYSCALL_64_after_hwframe+0x49/0xb3
> RIP: 0033:0x7f449ff49687
> Code: Bad RIP value.
> RSP: 002b:00007ffdd3b9fe58 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
> RAX: ffffffffffffffda RBX: 00005567752fd985 RCX: 00007f449ff49687
> RDX: 00007ffdd3b9fd20 RSI: 00000000000001ed RDI: 00005567752fd985
> RBP: 00007f449ff49680 R08: 0000000000000100 R09: 0000000000000000
> R10: 00005567752fd980 R11: 0000000000000246 R12: 00000000000001ed
> R13: 00007ffdd3b9ffe0 R14: 0000000000000000 R15: 0000000000000000
I am seeing this all over the place on Linus's tree right now:
[ +0.008563] BUG: using smp_processor_id() in preemptible [00000000] code: systemd/1
[ +0.000011] caller is ext4_mb_new_blocks+0x2ac/0xc10
[ +0.000002] CPU: 31 PID: 1 Comm: systemd Not tainted 5.7.0-14371-g25ae6195a4c7 #66
[ +0.000002] Hardware name: Micro-Star International Co., Ltd. MS-7C59/Creator TRX40 (MS-7C59), BIOS 1.50 05/13/2020
[ +0.000001] Call Trace:
[ +0.000008] dump_stack+0x57/0x70
[ +0.000004] debug_smp_processor_id.cold+0x4e/0x53
[ +0.000001] ext4_mb_new_blocks+0x2ac/0xc10
[ +0.000004] ? ext4_find_extent+0x3e8/0x450
[ +0.000002] ext4_ext_map_blocks+0x9f6/0x1b10
[ +0.000003] ? ext4_mark_iloc_dirty+0x60f/0xa50
[ +0.000003] ? __ext4_journal_get_write_access+0x2d/0x70
[ +0.000004] ext4_map_blocks+0x119/0x5a0
[ +0.000004] ext4_getblk+0x66/0x1c0
[ +0.000003] ext4_bread+0x26/0xc0
[ +0.000002] ext4_append+0x49/0xe0
[ +0.000002] ext4_mkdir+0x233/0x450
[ +0.000005] vfs_mkdir+0x11d/0x1b0
[ +0.000003] do_mkdirat+0x92/0x130
[ +0.000004] do_syscall_64+0x43/0x80
[ +0.000004] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ +0.000003] RIP: 0033:0x7fef3df7a72b
[ +0.000001] Code: Bad RIP value.
[ +0.000001] RSP: 002b:00007ffdb4eba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
[ +0.000003] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fef3df7a72b
[ +0.000001] RDX: 0000000000000000 RSI: 00000000000001c0 RDI: 0000563b11cf26e0
[ +0.000001] RBP: 0000563b11cf2731 R08: 000000000000000d R09: 0000000000000002
[ +0.000000] R10: 11175e4331068ed5 R11: 0000000000000246 R12: 0000563b11cf26e0
[ +0.000002] R13: 00007fef3e019c20 R14: 00007ffdb4eba0f0 R15: 8421084210842109
Just a constant stream of them.
There's a few other fun:
[ +0.453222] BUG: unable to handle page fault for address: ffffb59cc2719000
[ +0.000004] #PF: supervisor write access in kernel mode
[ +0.000001] #PF: error_code(0x000b) - reserved bit violation
messages at times, but I don't think that's an ext4 issue, but rather
something in the sound stack...
EXT4 developers, any hints/patches to try?
thanks,
greg k-h
> I am seeing this all over the place on Linus's tree right now:
>
> [ +0.008563] BUG: using smp_processor_id() in preemptible [00000000] code: systemd/1
> [ +0.000011] caller is ext4_mb_new_blocks+0x2ac/0xc10
> [ +0.000002] CPU: 31 PID: 1 Comm: systemd Not tainted 5.7.0-14371-g25ae6195a4c7 #66
> [ +0.000002] Hardware name: Micro-Star International Co., Ltd. MS-7C59/Creator TRX40 (MS-7C59), BIOS 1.50 05/13/2020
> [ +0.000001] Call Trace:
> [ +0.000008] dump_stack+0x57/0x70
> [ +0.000004] debug_smp_processor_id.cold+0x4e/0x53
> [ +0.000001] ext4_mb_new_blocks+0x2ac/0xc10
> [ +0.000004] ? ext4_find_extent+0x3e8/0x450
> [ +0.000002] ext4_ext_map_blocks+0x9f6/0x1b10
> [ +0.000003] ? ext4_mark_iloc_dirty+0x60f/0xa50
> [ +0.000003] ? __ext4_journal_get_write_access+0x2d/0x70
> [ +0.000004] ext4_map_blocks+0x119/0x5a0
> [ +0.000004] ext4_getblk+0x66/0x1c0
> [ +0.000003] ext4_bread+0x26/0xc0
> [ +0.000002] ext4_append+0x49/0xe0
> [ +0.000002] ext4_mkdir+0x233/0x450
> [ +0.000005] vfs_mkdir+0x11d/0x1b0
> [ +0.000003] do_mkdirat+0x92/0x130
> [ +0.000004] do_syscall_64+0x43/0x80
> [ +0.000004] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ +0.000003] RIP: 0033:0x7fef3df7a72b
> [ +0.000001] Code: Bad RIP value.
> [ +0.000001] RSP: 002b:00007ffdb4eba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
> [ +0.000003] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fef3df7a72b
> [ +0.000001] RDX: 0000000000000000 RSI: 00000000000001c0 RDI: 0000563b11cf26e0
> [ +0.000001] RBP: 0000563b11cf2731 R08: 000000000000000d R09: 0000000000000002
> [ +0.000000] R10: 11175e4331068ed5 R11: 0000000000000246 R12: 0000563b11cf26e0
> [ +0.000002] R13: 00007fef3e019c20 R14: 00007ffdb4eba0f0 R15: 8421084210842109
>
> Just a constant stream of them.
>
> There's a few other fun:
>
> [ +0.453222] BUG: unable to handle page fault for address: ffffb59cc2719000
> [ +0.000004] #PF: supervisor write access in kernel mode
> [ +0.000001] #PF: error_code(0x000b) - reserved bit violation
>
> messages at times, but I don't think that's an ext4 issue, but rather
> something in the sound stack...
>
> EXT4 developers, any hints/patches to try?
>
Below patch should fix the ext4 issue coming from ext4_mb_new_blocks().
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?h=dev&id=811985365378df01386c3cfb7ff716e74ca376d5
Not sure about the second one though.
-ritesh
On Fri, Jun 12, 2020 at 10:20:35PM +0530, Ritesh Harjani wrote:
> > I am seeing this all over the place on Linus's tree right now:
> >
> > [ +0.008563] BUG: using smp_processor_id() in preemptible [00000000] code: systemd/1
> > [ +0.000011] caller is ext4_mb_new_blocks+0x2ac/0xc10
> > [ +0.000002] CPU: 31 PID: 1 Comm: systemd Not tainted 5.7.0-14371-g25ae6195a4c7 #66
> > [ +0.000002] Hardware name: Micro-Star International Co., Ltd. MS-7C59/Creator TRX40 (MS-7C59), BIOS 1.50 05/13/2020
> > [ +0.000001] Call Trace:
> > [ +0.000008] dump_stack+0x57/0x70
> > [ +0.000004] debug_smp_processor_id.cold+0x4e/0x53
> > [ +0.000001] ext4_mb_new_blocks+0x2ac/0xc10
> > [ +0.000004] ? ext4_find_extent+0x3e8/0x450
> > [ +0.000002] ext4_ext_map_blocks+0x9f6/0x1b10
> > [ +0.000003] ? ext4_mark_iloc_dirty+0x60f/0xa50
> > [ +0.000003] ? __ext4_journal_get_write_access+0x2d/0x70
> > [ +0.000004] ext4_map_blocks+0x119/0x5a0
> > [ +0.000004] ext4_getblk+0x66/0x1c0
> > [ +0.000003] ext4_bread+0x26/0xc0
> > [ +0.000002] ext4_append+0x49/0xe0
> > [ +0.000002] ext4_mkdir+0x233/0x450
> > [ +0.000005] vfs_mkdir+0x11d/0x1b0
> > [ +0.000003] do_mkdirat+0x92/0x130
> > [ +0.000004] do_syscall_64+0x43/0x80
> > [ +0.000004] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ +0.000003] RIP: 0033:0x7fef3df7a72b
> > [ +0.000001] Code: Bad RIP value.
> > [ +0.000001] RSP: 002b:00007ffdb4eba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
> > [ +0.000003] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fef3df7a72b
> > [ +0.000001] RDX: 0000000000000000 RSI: 00000000000001c0 RDI: 0000563b11cf26e0
> > [ +0.000001] RBP: 0000563b11cf2731 R08: 000000000000000d R09: 0000000000000002
> > [ +0.000000] R10: 11175e4331068ed5 R11: 0000000000000246 R12: 0000563b11cf26e0
> > [ +0.000002] R13: 00007fef3e019c20 R14: 00007ffdb4eba0f0 R15: 8421084210842109
> >
> > Just a constant stream of them.
> >
> > There's a few other fun:
> >
> > [ +0.453222] BUG: unable to handle page fault for address: ffffb59cc2719000
> > [ +0.000004] #PF: supervisor write access in kernel mode
> > [ +0.000001] #PF: error_code(0x000b) - reserved bit violation
> >
> > messages at times, but I don't think that's an ext4 issue, but rather
> > something in the sound stack...
> >
> > EXT4 developers, any hints/patches to try?
> >
>
> Below patch should fix the ext4 issue coming from ext4_mb_new_blocks().
>
> https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?h=dev&id=811985365378df01386c3cfb7ff716e74ca376d5
Thanks, that should work, I'll try it out on Monday.
greg k-h