====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/1121 is trying to acquire lock: 00000000a17d3280 (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 but task is already holding lock: 000000004487e54b (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 block_read_full_page+0x288/0xd10 fs/buffer.c:2259 do_read_cache_page+0x533/0x1170 mm/filemap.c:2828 read_mapping_page include/linux/pagemap.h:402 [inline] hfsplus_block_allocate+0x197/0xa60 fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0x436/0xf40 fs/hfsplus/extents.c:468 hfsplus_get_block+0x196/0x960 fs/hfsplus/extents.c:245 overlayfs: overlapping lowerdir path __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978 __block_write_begin fs/buffer.c:2028 [inline] block_write_begin+0x58/0x2e0 fs/buffer.c:2087 cont_write_begin+0x55a/0x820 fs/buffer.c:2440 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323 call_write_iter include/linux/fs.h:1821 [inline] aio_write+0x37f/0x5c0 fs/aio.c:1574 __io_submit_one fs/aio.c:1858 [inline] io_submit_one+0xecd/0x20c0 fs/aio.c:1909 __do_sys_io_submit fs/aio.c:1953 [inline] __se_sys_io_submit+0x11b/0x4a0 fs/aio.c:1924 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sbi->alloc_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x228/0x520 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0xd96/0x1040 fs/hfsplus/extents.c:591 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); *** DEADLOCK *** 3 locks held by syz-executor.2/1121: #0: 00000000db704843 (sb_writers#23){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000db704843 (sb_writers#23){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000f7d5c7f9 (&sb->s_type->i_mutex_key#33){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000f7d5c7f9 (&sb->s_type->i_mutex_key#33){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 000000004487e54b (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 stack backtrace: CPU: 1 PID: 1121 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x228/0x520 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0xd96/0x1040 fs/hfsplus/extents.c:591 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 RIP: 0033:0x7f15c356c0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f15c1ade168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f15c368bf80 RCX: 00007f15c356c0a9 RDX: 0000000000000000 RSI: 0000000000143242 RDI: 0000000020000000 RBP: 00007f15c35c7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfb35145f R14: 00007f15c1ade300 R15: 0000000000022000 kauditd_printk_skb: 80 callbacks suppressed audit: type=1804 audit(1672097660.244:643): pid=1171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/897/bus" dev="sda1" ino=15825 res=1 audit: type=1804 audit(1672097660.464:644): pid=1196 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/898/bus" dev="sda1" ino=15809 res=1 overlayfs: failed to resolve './file0': -2 audit: type=1804 audit(1672097660.734:645): pid=1232 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/899/bus/bus" dev="loop4" ino=8 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1804 audit(1672097660.994:646): pid=1265 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/900/bus" dev="sda1" ino=13891 res=1 audit: type=1804 audit(1672097661.024:647): pid=1264 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/900/bus" dev="sda1" ino=13891 res=1 overlayfs: unrecognized mount option "./bus" or missing value netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1804 audit(1672097661.224:648): pid=1290 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/901/bus" dev="sda1" ino=13938 res=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1804 audit(1672097661.254:649): pid=1292 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/901/bus" dev="sda1" ino=13938 res=1 audit: type=1804 audit(1672097661.684:650): pid=1340 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/902/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097661.684:651): pid=1340 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/902/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097661.684:652): pid=1340 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/902/bus/bus" dev="loop4" ino=8 res=1 overlayfs: unrecognized mount option "./bus" or missing value overlayfs: unrecognized mount option "./bus" or missing value netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. kauditd_printk_skb: 58 callbacks suppressed audit: type=1804 audit(1672097665.454:711): pid=1693 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/913/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097665.504:712): pid=1699 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/913/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097665.524:713): pid=1703 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/913/bus/bus" dev="loop4" ino=8 res=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1672097666.244:714): pid=1796 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/917/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097666.714:715): pid=1816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/918/bus/bus" dev="loop4" ino=8 res=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1672097666.754:716): pid=1828 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/918/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097666.754:717): pid=1830 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/918/bus/bus" dev="loop4" ino=8 res=1 audit: type=1804 audit(1672097666.864:718): pid=1850 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/919/bus" dev="sda1" ino=13961 res=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1672097669.135:719): pid=2091 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir705175454/syzkaller.WdrNvZ/923/bus/bus" dev="loop4" ino=8 res=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'.