syzbot


possible deadlock in vm_mmap_pgoff

Status: upstream: reported C repro on 2023/03/19 23:00
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+958355bd694fe8943178@syzkaller.appspotmail.com
First crash: 458d, last: 5d02h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2023/05/10 upstream (ToT) ad2fd53a7870 C [report] possible deadlock in vm_mmap_pgoff
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in vm_mmap_pgoff origin:upstream C 35 10d 457d 0/3 upstream: reported C repro on 2023/03/20 04:41
linux-4.19 possible deadlock in vm_mmap_pgoff (2) C error 2 569d 572d 0/1 upstream: reported C repro on 2022/11/25 13:47
linux-4.19 possible deadlock in vm_mmap_pgoff 4 1050d 1172d 0/1 auto-closed as invalid on 2021/12/02 20:13
upstream possible deadlock in vm_mmap_pgoff reiserfs C inconclusive inconclusive 225 142d 1149d 0/27 auto-obsoleted due to no activity on 2024/04/27 11:44
linux-4.14 possible deadlock in vm_mmap_pgoff reiserfs C 4 497d 564d 0/1 upstream: reported C repro on 2022/12/03 00:54

Sample crash report:
REISERFS (device loop0): using 3.5.x disk format
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
5.15.158-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor197/4065 is trying to acquire lock:
ffff0000d3e2c090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27

but task is already holding lock:
ffff0000c7c25758 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
ffff0000c7c25758 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x2b4 mm/util.c:549

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&mm->mmap_lock){++++}-{3:3}:
       __might_fault+0xc8/0x128 mm/memory.c:5328
       reiserfs_ioctl+0x110/0x4b8 fs/reiserfs/ioctl.c:96
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:874 [inline]
       __se_sys_ioctl fs/ioctl.c:860 [inline]
       __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #0 (&sbi->lock){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain kernel/locking/lockdep.c:3788 [inline]
       __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
       lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
       __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
       reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27
       reiserfs_dirty_inode+0xe4/0x204 fs/reiserfs/super.c:704
       __mark_inode_dirty+0x2b0/0x10f4 fs/fs-writeback.c:2464
       generic_update_time fs/inode.c:1817 [inline]
       inode_update_time fs/inode.c:1830 [inline]
       touch_atime+0x4d0/0xa4c fs/inode.c:1902
       file_accessed include/linux/fs.h:2516 [inline]
       generic_file_mmap+0xb0/0x11c mm/filemap.c:3401
       call_mmap include/linux/fs.h:2177 [inline]
       mmap_region+0xcb4/0x12f0 mm/mmap.c:1791
       do_mmap+0x6c0/0xcec mm/mmap.c:1575
       vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:551
       ksys_mmap_pgoff+0x458/0x668 mm/mmap.c:1624
       __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
       __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
       __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_lock);
                               lock(&sbi->lock);
                               lock(&mm->mmap_lock);
  lock(&sbi->lock);

 *** DEADLOCK ***

2 locks held by syz-executor197/4065:
 #0: ffff0000c7c25758 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #0: ffff0000c7c25758 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x2b4 mm/util.c:549
 #1: ffff0000c1376460 (sb_writers#8){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2516 [inline]
 #1: ffff0000c1376460 (sb_writers#8){.+.+}-{0:0}, at: generic_file_mmap+0xb0/0x11c mm/filemap.c:3401

stack backtrace:
CPU: 0 PID: 4065 Comm: syz-executor197 Not tainted 5.15.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011
 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain kernel/locking/lockdep.c:3788 [inline]
 __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27
 reiserfs_dirty_inode+0xe4/0x204 fs/reiserfs/super.c:704
 __mark_inode_dirty+0x2b0/0x10f4 fs/fs-writeback.c:2464
 generic_update_time fs/inode.c:1817 [inline]
 inode_update_time fs/inode.c:1830 [inline]
 touch_atime+0x4d0/0xa4c fs/inode.c:1902
 file_accessed include/linux/fs.h:2516 [inline]
 generic_file_mmap+0xb0/0x11c mm/filemap.c:3401
 call_mmap include/linux/fs.h:2177 [inline]
 mmap_region+0xcb4/0x12f0 mm/mmap.c:1791
 do_mmap+0x6c0/0xcec mm/mmap.c:1575
 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:551
 ksys_mmap_pgoff+0x458/0x668 mm/mmap.c:1624
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Crashes (38):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/12 10:31 linux-5.15.y 284087d4f7d5 9026e142 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/05/09 18:30 linux-5.15.y 284087d4f7d5 05079661 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/05/01 10:19 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/03/19 23:00 linux-5.15.y 8020ae3c051d 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/06/17 12:45 linux-5.15.y 471e639e59d1 f3921d4d .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2023/06/09 00:54 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2023/06/01 19:03 linux-5.15.y 0ab06468cbd1 babc4389 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/01/22 07:39 linux-5.15.y ddcaf4999061 9bd8dcda .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/03/13 16:16 linux-5.15.y 574362648507 db5b7ff0 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/06/24 03:03 linux-5.15.y f67653019430 79782afc .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2023/05/18 17:36 linux-5.15.y 9d6bde853685 3bb7af1d .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/06/13 14:16 linux-5.15.y c61bd26ae81a a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/05/14 01:27 linux-5.15.y 284087d4f7d5 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/05/12 15:50 linux-5.15.y 284087d4f7d5 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/04/29 06:14 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/04/29 06:14 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/04/27 18:33 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/04/25 23:50 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/04/25 23:33 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2023/10/13 05:21 linux-5.15.y 02e21884dcf2 6388bc36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in vm_mmap_pgoff
2024/06/14 22:03 linux-5.15.y c61bd26ae81a f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/06/14 22:03 linux-5.15.y c61bd26ae81a f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/05/28 18:27 linux-5.15.y c61bd26ae81a 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/05/02 19:18 linux-5.15.y 284087d4f7d5 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/04/23 04:09 linux-5.15.y c52b9710c83d 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/04/15 08:15 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/04/15 07:40 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/04/15 07:40 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2024/01/23 08:25 linux-5.15.y ddcaf4999061 1c0ecc51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/10/10 05:05 linux-5.15.y 1edcec18cfb7 c9be5398 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/08/03 08:42 linux-5.15.y 09996673e313 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/07/27 13:01 linux-5.15.y 09996673e313 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/07/17 15:29 linux-5.15.y d54cfc420586 20f8b3c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/06/17 02:57 linux-5.15.y 471e639e59d1 f3921d4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/05/31 08:15 linux-5.15.y 0ab06468cbd1 09898419 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/05/10 07:46 linux-5.15.y 8a7f2a5c5aa1 1964022b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/05/03 05:08 linux-5.15.y 8a7f2a5c5aa1 48e0a81d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
2023/04/10 18:22 linux-5.15.y d86dfc4d95cd 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in vm_mmap_pgoff
* Struck through repros no longer work on HEAD.