[lkml]   [2020]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subjectupstream test error: BUG: using smp_processor_id() in preemptible code in ext4_mb_new_blocks

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:
kernel config:
dashboard link:
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

IMPORTANT: if you fix the bug, please add the following tag to the commit:

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
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

This bug is generated by a bot. It may contain errors.
See for more information about syzbot.
syzbot engineers can be reached at

syzbot will keep track of this bug report. See: for how to communicate with syzbot.

 \ /
  Last update: 2020-06-10 03:48    [W:0.042 / U:1.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site