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BUG: scheduling while atomic in exit_to_user_mode_loop

Status: upstream: reported C repro on 2025/05/25 06:17
Reported-by: syzbot+eb504c1673110fdd427e@syzkaller.appspotmail.com
First crash: 248d, last: 1h39m
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: scheduling while atomic in exit_to_user_mode_loop ntfs3 5 syz error error 1 1180d 1207d 0/29 auto-obsoleted due to no activity on 2023/05/14 09:44
linux-6.1 BUG: scheduling while atomic in exit_to_user_mode_loop origin:lts-only 5 C done 3 707d 759d 0/3 upstream: reported C repro on 2023/12/30 14:50
android-5-15 BUG: scheduling while atomic in exit_to_user_mode_loop origin:upstream 5 C done 847 13h00m 760d 0/2 upstream: reported C repro on 2023/12/30 11:04
android-6-1 BUG: scheduling while atomic in exit_to_user_mode_loop 5 C done 1087 578d 760d 0/2 auto-obsoleted due to no activity on 2024/09/07 07:43
linux-5.15 BUG: scheduling while atomic in exit_to_user_mode_loop origin:lts-only 5 syz unreliable 2 709d 715d 0/3 auto-obsoleted due to no activity on 2024/10/07 06:36
linux-5.15 BUG: scheduling while atomic in exit_to_user_mode_loop (2) origin:lts-only 5 C error 4 3d04h 3d06h 0/3 upstream: reported C repro on 2026/01/25 08:39
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/01/09 07:20 6m retest repro android13-5.10-lts report log
2026/01/09 07:20 6m retest repro android13-5.10-lts report log
2026/01/09 07:20 6m retest repro android13-5.10-lts report log
2026/01/09 07:20 8m retest repro android13-5.10-lts report log
2025/12/16 14:21 11m retest repro android13-5.10-lts report log
2025/12/16 14:21 10m retest repro android13-5.10-lts report log
2025/10/25 07:38 7m retest repro android13-5.10-lts report log
2025/10/25 07:38 6m retest repro android13-5.10-lts report log
2025/10/25 07:38 7m retest repro android13-5.10-lts report log
2025/10/07 12:55 8m retest repro android13-5.10-lts report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2025/11/24 20:12 1h31m bisect fix android13-5.10-lts OK (0) job log log
2025/07/08 12:44 1h07m bisect fix android13-5.10-lts OK (0) job log log

Sample crash report:
erofs: (device loop2): mounted with root inode @ nid 36.
BUG: scheduling while atomic: syz.2.40/439/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff8215ce88>] kmap_atomic include/linux/highmem.h:156 [inline]
[<ffffffff8215ce88>] z_erofs_reload_indexes+0x318/0x450 fs/erofs/zmap.c:148
CPU: 0 PID: 439 Comm: syz.2.40 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 dump_stack+0x15/0x1c lib/dump_stack.c:135
 __schedule_bug+0x183/0x240 kernel/sched/core.c:4545
 schedule_debug kernel/sched/core.c:4572 [inline]
 __schedule+0xc45/0x1320 kernel/sched/core.c:4700
 schedule+0x13c/0x1d0 kernel/sched/core.c:4884
 exit_to_user_mode_loop+0x4b/0xe0 kernel/entry/common.c:160
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fdca7d2eeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1239df28 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fff1239e010 RCX: 00007fdca7d2eeb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000008627 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31f20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdca7fa9fac R14: 00007fdca7fa9fa8 R15: 00007fdca7fa9fa0

Crashes (49):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/27 19:51 android13-5.10-lts 186f761c519d 9a514c2f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 03:50 android13-5.10-lts da202673e11a efb3e894 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/25 02:07 android13-5.10-lts 5601baec60aa 40acda8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/24 00:40 android13-5.10-lts 5601baec60aa 4f25b9b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/17 06:47 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/11 04:32 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/12/25 21:33 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/09/14 17:53 android13-5.10-lts 911f602c2237 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/07/31 10:49 android13-5.10-lts 1154f779f3f3 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/07/31 10:32 android13-5.10-lts 1154f779f3f3 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/07/20 14:03 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/05/25 06:15 android13-5.10-lts 7e2543346ff7 ed351ea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/17 06:25 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/09/14 17:29 android13-5.10-lts 911f602c2237 e2beed91 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/28 13:10 android13-5.10-lts 186f761c519d 004c195c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/28 09:59 android13-5.10-lts 186f761c519d 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/28 05:23 android13-5.10-lts 186f761c519d 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/28 04:11 android13-5.10-lts 186f761c519d 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 21:03 android13-5.10-lts 186f761c519d 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 09:06 android13-5.10-lts da202673e11a efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 08:21 android13-5.10-lts da202673e11a efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 07:48 android13-5.10-lts da202673e11a efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 07:39 android13-5.10-lts da202673e11a efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/27 03:16 android13-5.10-lts da202673e11a efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/22 05:38 android13-5.10-lts c74681d01ab2 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/22 05:37 android13-5.10-lts c74681d01ab2 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/20 23:23 android13-5.10-lts e253c52bbdfc 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/20 23:23 android13-5.10-lts e253c52bbdfc 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/19 16:08 android13-5.10-lts e253c52bbdfc a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/19 15:58 android13-5.10-lts e253c52bbdfc a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/18 11:10 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/18 09:48 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/18 09:48 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/18 09:48 android13-5.10-lts e253c52bbdfc 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/12 03:53 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2026/01/10 01:50 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/12/25 21:19 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/12/25 21:18 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/12/17 13:14 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/09/18 00:06 android13-5.10-lts 911f602c2237 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/09/18 00:06 android13-5.10-lts 911f602c2237 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/05/25 06:01 android13-5.10-lts 7e2543346ff7 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/05/25 06:01 android13-5.10-lts 7e2543346ff7 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/05/25 06:01 android13-5.10-lts 7e2543346ff7 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
2025/05/25 06:01 android13-5.10-lts 7e2543346ff7 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: scheduling while atomic in exit_to_user_mode_loop
* Struck through repros no longer work on HEAD.