syzbot


BUG: sleeping function called from invalid context in folio_mc_copy

Status: upstream: reported C repro on 2025/03/27 16:26
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+f3c6fda1297c748a7076@syzkaller.appspotmail.com
Fix commit: 2d900efff915 mm/migrate: fix sleep in atomic for large folios and buffer heads
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-usb]
First crash: 32d, last: 4h35m
Cause bisection: introduced by (bisect log) :
commit 3c20917120ce61f2a123ca0810293872f4c6b5a4
Author: Hannes Reinecke <hare@suse.de>
Date: Fri Feb 21 22:38:21 2025 +0000

  block/bdev: enable large folio support for large logical block sizes

Crash: BUG: sleeping function called from invalid context in folio_mc_copy (log)
Repro: C syz .config
  
Discussions (6)
Title Replies (including bot) Last reply
[PATCH v2 1/8] migrate: fix skipping metadata buffer heads on migration 21 (21) 2025/04/25 22:51
[PATCH 7/7] mm/migrate: fix sleep in atomic for large folios and buffer heads 1 (1) 2025/04/18 01:59
[PATCH 7/7] mm/migrate: fix sleep in atomic for large folios and buffer heads 2 (2) 2025/04/16 09:43
[PATCH 3/3] mm/migrate: avoid atomic context on buffer_migrate_folio_norefs() migration 1 (1) 2025/03/30 06:47
Re: [syzbot] [mm?] [fs?] BUG: sleeping function called from invalid context in folio_mc_copy 1 (1) 2025/03/30 04:59
[syzbot] [mm?] [fs?] BUG: sleeping function called from invalid context in folio_mc_copy 3 (5) 2025/03/30 04:02
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/03/30 04:02 17m mcgrof@kernel.org https://github.com/linux-kdevops/linux.git 20250529-ext4-migration-fix report log

Sample crash report:
BUG: sleeping function called from invalid context at mm/util.c:743
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8907, name: syz-executor410
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
1 lock held by syz-executor410/8907:
 #0: ffff888023e2da48 (&mapping->i_private_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #0: ffff888023e2da48 (&mapping->i_private_lock){+.+.}-{3:3}, at: __buffer_migrate_folio+0x25b/0x690 mm/migrate.c:853
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 8907 Comm: syz-executor410 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8818
 folio_mc_copy+0xfb/0x190 mm/util.c:743
 __migrate_folio.constprop.0+0xa1/0x3d0 mm/migrate.c:758
 filemap_migrate_folio mm/migrate.c:943 [inline]
 __buffer_migrate_folio+0x5cd/0x690 mm/migrate.c:874
 move_to_new_folio+0x1d9/0x700 mm/migrate.c:1050
 migrate_folio_move mm/migrate.c:1358 [inline]
 migrate_folios_move mm/migrate.c:1710 [inline]
 migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1957
 migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1987
 migrate_pages+0x1b28/0x2350 mm/migrate.c:2096
 do_mbind+0x6f0/0xf30 mm/mempolicy.c:1425
 kernel_mbind+0x1e3/0x1f0 mm/mempolicy.c:1568
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34ce448a49
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 1c 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:00007f34ce3f9158 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007f34ce4cb308 RCX: 00007f34ce448a49
RDX: 0000000000000004 RSI: 00000000002091d2 RDI: 0000000000000000
RBP: 00007f34ce4cb300 R08: 0000000000000006 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f34ce4cb30c
R13: 0000000000000000 R14: 00007fff9ac168e0 R15: 00007fff9ac169c8
 </TASK>

Crashes (5413):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/02 18:51 upstream acc4d5ff0b61 684b5338 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: sleeping function called from invalid context in folio_mc_copy
2025/03/26 03:08 upstream 2df0c02dab82 89d30d73 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: sleeping function called from invalid context in folio_mc_copy
2025/03/25 11:36 upstream 3ba7dfb8da62 875573af .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/03/25 09:03 upstream 3ba7dfb8da62 875573af .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/03/25 08:46 upstream 3ba7dfb8da62 875573af .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/03/25 08:30 upstream 3ba7dfb8da62 875573af .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 08:01 upstream c3137514f1f1 c6b4fb39 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 04:21 upstream c3137514f1f1 c6b4fb39 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-snapshot-upstream-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 03:18 upstream c3137514f1f1 c6b4fb39 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-snapshot-upstream-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 05:44 upstream 02ddfb981de8 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 19:36 upstream 02ddfb981de8 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 12:27 upstream 02ddfb981de8 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 11:59 upstream 02ddfb981de8 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 09:05 upstream 02ddfb981de8 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 05:34 upstream 02ddfb981de8 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 00:15 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 23:13 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 20:26 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 17:26 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 15:04 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 13:10 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 11:40 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 09:34 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 07:42 upstream a79be02bba5c 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 06:37 upstream a79be02bba5c 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/23 12:33 upstream bc3372351d0c d971f7e2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/23 06:52 upstream bc3372351d0c 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/14 16:48 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 07:05 upstream e72e9e693307 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 04:45 upstream e72e9e693307 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 09:53 upstream c3137514f1f1 c6b4fb39 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 07:34 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 02:32 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 20:46 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 15:11 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 10:11 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 08:21 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 03:37 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 02:36 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 21:30 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 08:50 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 06:23 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/26 01:47 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 23:03 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 21:53 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 17:39 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 17:31 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 16:29 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 13:47 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 10:51 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 06:39 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/25 01:07 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 22:12 upstream e72e9e693307 e3715315 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 18:57 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 18:29 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 16:22 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 15:12 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 13:40 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 10:30 upstream a79be02bba5c 9c80ffa0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/24 08:47 upstream a79be02bba5c 9882047a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/13 13:18 linux-next 01c6df60d5d4 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: sleeping function called from invalid context in folio_mc_copy
2025/04/19 07:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c72692105976 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: sleeping function called from invalid context in folio_mc_copy
* Struck through repros no longer work on HEAD.