syzbot


BUG: spinlock bad magic in unmap_page_range

Status: auto-closed as invalid on 2021/09/08 23:10
Reported-by: syzbot+eee676968875ee4afcce@syzkaller.appspotmail.com
First crash: 411d, last: 411d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: spinlock bad magic in unmap_page_range 1 427d 422d 0/22 auto-closed as invalid on 2021/06/25 01:48

Sample crash report:
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
BUG: spinlock bad magic on CPU#1, systemd-udevd/8412
 lock: 0xffff88800010f898, .magic: 00000000, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 8412 Comm: systemd-udevd Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 do_raw_spin_lock+0x18e/0x200 kernel/locking/spinlock_debug.c:112
 spin_lock include/linux/spinlock.h:317 [inline]
 zap_pte_range mm/memory.c:1315 [inline]
 zap_pmd_range mm/memory.c:1456 [inline]
 zap_pud_range mm/memory.c:1485 [inline]
 zap_p4d_range mm/memory.c:1506 [inline]
 unmap_page_range+0x887/0x1ce0 mm/memory.c:1527
 unmap_single_vma+0x147/0x2b0 mm/memory.c:1572
 unmap_vmas+0x9d/0x160 mm/memory.c:1602
 exit_mmap+0x270/0x4d0 mm/mmap.c:3058
 __mmput kernel/fork.c:930 [inline]
 mmput kernel/fork.c:951 [inline]
 mmput+0xfa/0x420 kernel/fork.c:946
 exit_mm kernel/exit.c:548 [inline]
 do_exit+0x984/0x2850 kernel/exit.c:855
 do_group_exit+0x100/0x2e0 kernel/exit.c:965
 SYSC_exit_group kernel/exit.c:976 [inline]
 SyS_exit_group+0x19/0x20 kernel/exit.c:974
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f82ad4f8618
RSP: 002b:00007ffd9003ef48 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ffd9003f010 RCX: 00007f82ad4f8618
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007ffd9003f0c0 R08: 00000000000000e7 R09: fffffffffffffe50
R10: 00000000ffffffff R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
EXT4-fs warning (device sda1): verify_group_input:131: Cannot add at group 9 (only 16 groups)
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 72 bytes leftover after parsing attributes in process `syz-executor.4'.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 72 bytes leftover after parsing attributes in process `syz-executor.4'.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 72 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 72 bytes leftover after parsing attributes in process `syz-executor.4'.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
netlink: 84 bytes leftover after parsing attributes in process `syz-executor.5'.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
FAT-fs (loop5): Unrecognized mount option "context=staff_u" or missing value
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
NFS: bad mount option value specified: v7
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
qnx4: no qnx4 filesystem (no root dir).
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
qnx4: no qnx4 filesystem (no root dir).
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.
VFS: unable to read V7 FS superblock on device loop4.
VFS: could not find a valid V7 on loop4.

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2021/05/11 23:09 linux-4.14.y 7d7d1c0ab3eb b3c3bb8e .config log report info BUG: spinlock bad magic in unmap_page_range