audit: type=1326 audit(1677710929.283:339): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31258 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted audit: type=1800 audit(1677710929.513:340): pid=31286 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=15715 res=0 ------------------------------------------------------ syz-executor.5/31285 is trying to acquire lock: 00000000ad3ef125 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 but task is already holding lock: 0000000043c9348b (&tree->tree_lock){+.+.}, at: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock){+.+.}: hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 (&HFSPLUS_I(inode)->extents_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 hfsplus_rename_cat+0x272/0x1490 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x49c/0x820 fs/hfsplus/dir.c:376 vfs_unlink+0x27d/0x4e0 fs/namei.c:4002 do_unlinkat+0x3b8/0x660 fs/namei.c:4065 do_coredump+0x1f9c/0x2d60 fs/coredump.c:687 get_signal+0xed9/0x1f70 kernel/signal.c:2583 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** 5 locks held by syz-executor.5/31285: #0: 000000007811bdb6 (sb_writers#30){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000007811bdb6 (sb_writers#30){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000ac2cb6c2 (&type->i_mutex_dir_key#16/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 00000000ac2cb6c2 (&type->i_mutex_dir_key#16/1){+.+.}, at: do_unlinkat+0x27d/0x660 fs/namei.c:4051 #2: 000000008876da30 (&sb->s_type->i_mutex_key#32){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #2: 000000008876da30 (&sb->s_type->i_mutex_key#32){+.+.}, at: vfs_unlink+0xca/0x4e0 fs/namei.c:3993 #3: 0000000019b4a841 (&sbi->vh_mutex){+.+.}, at: hfsplus_unlink+0x140/0x820 fs/hfsplus/dir.c:370 #4: 0000000043c9348b (&tree->tree_lock){+.+.}, at: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30 stack backtrace: CPU: 1 PID: 31285 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 hfsplus_rename_cat+0x272/0x1490 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x49c/0x820 fs/hfsplus/dir.c:376 vfs_unlink+0x27d/0x4e0 fs/namei.c:4002 do_unlinkat+0x3b8/0x660 fs/namei.c:4065 do_coredump+0x1f9c/0x2d60 fs/coredump.c:687 get_signal+0xed9/0x1f70 kernel/signal.c:2583 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 audit: type=1800 audit(1677710930.153:341): pid=31299 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=13934 res=0 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x4700000046 Code: Bad RIP value. RSP: 002b:0000000020000188 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f328b685050 RCX: 00007f328b5650f9 RDX: 0000000020000200 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f328b5c0ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9d663edf R14: 00007f3289ab6300 R15: 0000000000022000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1800 audit(1677710930.383:342): pid=31325 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=15949 res=0 audit: type=1326 audit(1677710930.413:343): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31319 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710931.263:344): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31360 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710932.123:345): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31406 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium RDS: rds_bind could not find a transport for fc02::1, load rds_tcp or rds_rdma? mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium RDS: rds_bind could not find a transport for fc02::1, load rds_tcp or rds_rdma? audit: type=1326 audit(1677710933.013:346): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31444 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 RDS: rds_bind could not find a transport for fc02::1, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for fc02::1, load rds_tcp or rds_rdma? mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710933.903:347): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31484 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 audit: type=1326 audit(1677710934.753:348): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31527 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710935.643:349): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31561 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 audit: type=1326 audit(1677710936.533:350): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31595 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710937.403:351): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31632 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 audit: type=1326 audit(1677710938.313:352): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31661 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1677710939.213:353): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31698 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fb2a28360f9 code=0xffff0000 netlink: 368 bytes leftover after parsing attributes in process `syz-executor.2'.