overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ====================================================== ISO 9660 Extensions: Microsoft Joliet Level 3 WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/32096 is trying to acquire lock: 000000008f551feb (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] 000000008f551feb (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 but task is already holding lock: 00000000df379f8e (&iint->mutex){+.+.}, at: process_measurement+0x316/0x1440 security/integrity/ima/ima_main.c:224 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&iint->mutex){+.+.}: process_measurement+0x316/0x1440 security/integrity/ima/ima_main.c:224 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (sb_writers#3){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_maybe_copy_up+0x11f/0x190 fs/overlayfs/copy_up.c:888 ovl_open+0xb4/0x260 fs/overlayfs/file.c:126 do_dentry_open+0x4aa/0x1160 fs/open.c:796 vfs_open fs/open.c:902 [inline] dentry_open+0x132/0x1d0 fs/open.c:918 ima_calc_file_hash+0x628/0x8a0 security/integrity/ima/ima_crypto.c:435 ima_collect_measurement+0x4c4/0x570 security/integrity/ima/ima_api.c:231 process_measurement+0xddd/0x1440 security/integrity/ima/ima_main.c:284 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&iint->mutex); lock(sb_writers#3); lock(&iint->mutex); lock(sb_writers#3); *** DEADLOCK *** 1 lock held by syz-executor.3/32096: #0: 00000000df379f8e (&iint->mutex){+.+.}, at: process_measurement+0x316/0x1440 security/integrity/ima/ima_main.c:224 stack backtrace: CPU: 0 PID: 32096 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_maybe_copy_up+0x11f/0x190 fs/overlayfs/copy_up.c:888 ovl_open+0xb4/0x260 fs/overlayfs/file.c:126 do_dentry_open+0x4aa/0x1160 fs/open.c:796 vfs_open fs/open.c:902 [inline] dentry_open+0x132/0x1d0 fs/open.c:918 ima_calc_file_hash+0x628/0x8a0 security/integrity/ima/ima_crypto.c:435 ima_collect_measurement+0x4c4/0x570 security/integrity/ima/ima_api.c:231 process_measurement+0xddd/0x1440 security/integrity/ima/ima_main.c:284 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3b1715f5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3b15ad2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f3b1727ff80 RCX: 00007f3b1715f5a9 RDX: 0000000000000003 RSI: 0000000020002040 RDI: ffffffffffffff9c RBP: 00007f3b171ba580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe46dd7dbf R14: 00007f3b15ad2300 R15: 0000000000022000 audit: type=1800 audit(1665618425.985:130): pid=32096 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="file0" dev="overlay" ino=644978 res=0 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. device geneve0 entered promiscuous mode ISOFS: File unit size != 0 for ISO file (1920). device macsec1 entered promiscuous mode device geneve0 left promiscuous mode overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. SQUASHFS error: zlib decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x74 SQUASHFS error: zlib decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x74 audit: type=1800 audit(1665618426.725:131): pid=32191 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="file0" dev="overlay" ino=645079 res=0 ISO 9660 Extensions: Microsoft Joliet Level 3 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 IPVS: ftp: loaded support on port[0] = 21 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). device geneve0 entered promiscuous mode device macsec1 entered promiscuous mode device geneve0 left promiscuous mode ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 IPVS: ftp: loaded support on port[0] = 21 ISOFS: Interleaved files not (yet) supported. device geneve0 entered promiscuous mode device macsec1 entered promiscuous mode ISOFS: File unit size != 0 for ISO file (1920). device geneve0 left promiscuous mode ISO 9660 Extensions: Microsoft Joliet Level 3 device geneve0 entered promiscuous mode device macsec1 entered promiscuous mode ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). device geneve0 left promiscuous mode device geneve0 entered promiscuous mode ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. device macsec1 entered promiscuous mode 9pnet: Insufficient options for proto=fd ISOFS: File unit size != 0 for ISO file (1920). device geneve0 left promiscuous mode 9pnet: Insufficient options for proto=fd ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. 9pnet: Could not find request transport: t ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). 9pnet: Unknown protocol version 9 9pnet: Insufficient options for proto=fd ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. 9pnet: Insufficient options for proto=fd ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). 9pnet: Unknown protocol version 9p200ÿÿ‡¥h¶vzw›ô•KÊIþY_غzœ—É›P¡q3òÅX!Æe`tÆû ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920). ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1920).