[ 15.869918][ T3891] 8021q: adding VLAN 0 to HW filter on device bond0 [ 15.876492][ T3891] eql: remember to turn off Van-Jacobson compression on your slave devices [ 15.921086][ T39] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 15.923855][ T3803] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.927555][ T4215] loop0: detected capacity change from 0 to 1024 [ 36.941422][ T4215] [ 36.941955][ T4215] ============================================ [ 36.943502][ T4215] WARNING: possible recursive locking detected [ 36.944998][ T4215] 6.1.31-syzkaller #0 Not tainted [ 36.946208][ T4215] -------------------------------------------- [ 36.947746][ T4215] syz-executor516/4215 is trying to acquire lock: [ 36.949398][ T4215] ffff0000d5cc20b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc [ 36.951979][ T4215] [ 36.951979][ T4215] but task is already holding lock: [ 36.953773][ T4215] ffff0000d5cc20b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc [ 36.956268][ T4215] [ 36.956268][ T4215] other info that might help us debug this: [ 36.958347][ T4215] Possible unsafe locking scenario: [ 36.958347][ T4215] [ 36.960230][ T4215] CPU0 [ 36.961077][ T4215] ---- [ 36.961940][ T4215] lock(&tree->tree_lock/1); [ 36.963131][ T4215] lock(&tree->tree_lock/1); [ 36.964365][ T4215] [ 36.964365][ T4215] *** DEADLOCK *** [ 36.964365][ T4215] [ 36.966511][ T4215] May be due to missing lock nesting notation [ 36.966511][ T4215] [ 36.968611][ T4215] 5 locks held by syz-executor516/4215: [ 36.969999][ T4215] #0: ffff0000d5cc0460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x244/0x914 [ 36.972346][ T4215] #1: ffff0000de24a4c0 (&sb->s_type->i_mutex_key#17){+.+.}-{3:3}, at: generic_file_write_iter+0x88/0x2b4 [ 36.975251][ T4215] #2: ffff0000de24a2c8 (&hip->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc [ 36.977902][ T4215] #3: ffff0000d5cc20b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc [ 36.980601][ T4215] #4: ffff0000de248108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc [ 36.983609][ T4215] [ 36.983609][ T4215] stack backtrace: [ 36.985136][ T4215] CPU: 0 PID: 4215 Comm: syz-executor516 Not tainted 6.1.31-syzkaller #0 [ 36.987332][ T4215] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 36.989914][ T4215] Call trace: [ 36.990742][ T4215] dump_backtrace+0x1c8/0x1f4 [ 36.991956][ T4215] show_stack+0x2c/0x3c [ 36.993021][ T4215] dump_stack_lvl+0x108/0x170 [ 36.994230][ T4215] dump_stack+0x1c/0x58 [ 36.995299][ T4215] __lock_acquire+0x6310/0x764c [ 36.996603][ T4215] lock_acquire+0x26c/0x7cc [ 36.997797][ T4215] __mutex_lock_common+0x190/0x21a0 [ 36.999078][ T4215] mutex_lock_nested+0x38/0x44 [ 37.000273][ T4215] hfsplus_find_init+0x144/0x1bc [ 37.001562][ T4215] hfsplus_file_extend+0x364/0x14cc [ 37.002890][ T4215] hfsplus_bmap_reserve+0xec/0x474 [ 37.004257][ T4215] __hfsplus_ext_write_extent+0x1e8/0x4ac [ 37.005782][ T4215] __hfsplus_ext_cache_extent+0x84/0xa84 [ 37.007246][ T4215] hfsplus_file_extend+0x390/0x14cc [ 37.008652][ T4215] hfsplus_get_block+0x398/0x1168 [ 37.009945][ T4215] __block_write_begin_int+0x340/0x13b4 [ 37.011416][ T4215] cont_write_begin+0x5c0/0x7d8 [ 37.012655][ T4215] hfsplus_write_begin+0x98/0xe4 [ 37.013981][ T4215] generic_perform_write+0x278/0x55c [ 37.015437][ T4215] __generic_file_write_iter+0x168/0x388 [ 37.016908][ T4215] generic_file_write_iter+0xb8/0x2b4 [ 37.018352][ T4215] vfs_write+0x610/0x914 [ 37.019509][ T4215] ksys_write+0x15c/0x26c [ 37.020604][ T4215] __arm64_sys_write+0x7c/0x90 [ 37.021861][ T4215] invoke_syscall+0x98/0x2c0 [ 37.023053][ T4215] el0_svc_common+0x138/0x258 [ 37.024230][ T4215] do_el0_svc+0x64/0x218 [ 37.025383][ T4215] el0_svc+0x58/0x168 [ 37.026411][ T4215] el0t_64_sync_handler+0x84/0xf0 [ 37.027704][ T4215] el0t_64_sync+0x18c/0x190