syzbot


BUG: scheduling while atomic in start_this_handle

Status: premoderation: reported on 2024/05/05 00:01
Reported-by: syzbot+47b7294ad39f8c5e6091@syzkaller.appspotmail.com
First crash: 46d, last: 46d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 BUG: scheduling while atomic in start_this_handle 6 65d 104d 0/2 premoderation: reported on 2024/03/08 03:24

Sample crash report:
BUG: scheduling while atomic: syz-executor.3/2819/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff81cc28ed>] bit_spin_lock include/linux/bit_spinlock.h:25 [inline]
[<ffffffff81cc28ed>] hlist_bl_lock+0x1d/0x120 include/linux/list_bl.h:148
CPU: 1 PID: 2819 Comm: syz-executor.3 Not tainted 6.1.75-syzkaller-00089-g1794308d463f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x1b lib/dump_stack.c:113
 __schedule_bug+0x195/0x260 kernel/sched/core.c:5964
 schedule_debug kernel/sched/core.c:5991 [inline]
 __schedule+0xcf7/0x1550 kernel/sched/core.c:6626
 schedule+0xc3/0x180 kernel/sched/core.c:6809
 start_this_handle+0x507/0x2080 fs/jbd2/transaction.c:399
 jbd2__journal_start+0x2ea/0x720 fs/jbd2/transaction.c:520
 __ext4_journal_start_sb+0x24d/0x4b0 fs/ext4/ext4_jbd2.c:105
 __ext4_new_inode+0x135d/0x40a0 fs/ext4/ialloc.c:1079
 ext4_create+0x275/0x550 fs/ext4/namei.c:2834
 lookup_open fs/namei.c:3489 [inline]
 open_last_lookups fs/namei.c:3557 [inline]
 path_openat+0x12ee/0x2d60 fs/namei.c:3787
 do_filp_open+0x230/0x480 fs/namei.c:3817
 do_sys_openat2+0x13f/0x850 fs/open.c:1341
 do_sys_open fs/open.c:1357 [inline]
 __do_sys_openat fs/open.c:1373 [inline]
 __se_sys_openat fs/open.c:1368 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1368
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1fce47dca9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1fcf25f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1fce5abf80 RCX: 00007f1fce47dca9
RDX: 00000000000026e1 RSI: 0000000020000180 RDI: ffffffffffffff9c
RBP: 00007f1fce4c947e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1fce5abf80 R15: 00007ffc76f73d88
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/05 00:00 android14-6.1 1794308d463f 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf BUG: scheduling while atomic in start_this_handle
* Struck through repros no longer work on HEAD.