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Message-Id: <1644985024-28757-1-git-send-email-byungchul.park@lge.com>
Date: Wed, 16 Feb 2022 13:17:03 +0900
From: Byungchul Park <byungchul.park@....com>
To: davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org
Cc: torvalds@...ux-foundation.org, mingo@...hat.com,
linux-kernel@...r.kernel.org, peterz@...radead.org,
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Subject: Report in unix_stream_read_generic()
[ 7.013330] ===================================================
[ 7.013331] DEPT: Circular dependency has been detected.
[ 7.013332] 5.17.0-rc1-00014-gcf3441bb2012 #2 Tainted: G W
[ 7.013333] ---------------------------------------------------
[ 7.013334] summary
[ 7.013334] ---------------------------------------------------
[ 7.013335] *** DEADLOCK ***
[ 7.013335]
[ 7.013335] context A
[ 7.013336] [S] (unknown)(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013337] [W] __mutex_lock_common(&u->iolock:0)
[ 7.013338] [E] event(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013340]
[ 7.013340] context B
[ 7.013341] [S] __raw_spin_lock(&u->lock:0)
[ 7.013342] [W] wait(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013343] [E] spin_unlock(&u->lock:0)
[ 7.013344]
[ 7.013344] context C
[ 7.013345] [S] __mutex_lock_common(&u->iolock:0)
[ 7.013346] [W] __raw_spin_lock(&u->lock:0)
[ 7.013347] [E] mutex_unlock(&u->iolock:0)
[ 7.013348]
[ 7.013348] [S]: start of the event context
[ 7.013349] [W]: the wait blocked
[ 7.013349] [E]: the event not reachable
[ 7.013350] ---------------------------------------------------
[ 7.013351] context A's detail
[ 7.013351] ---------------------------------------------------
[ 7.013352] context A
[ 7.013352] [S] (unknown)(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013353] [W] __mutex_lock_common(&u->iolock:0)
[ 7.013354] [E] event(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013355]
[ 7.013356] [S] (unknown)(&(&ei->socket.wq.wait)->dmap:0):
[ 7.013357] (N/A)
[ 7.013357]
[ 7.013358] [W] __mutex_lock_common(&u->iolock:0):
[ 7.013359] [<ffffffff81aa4918>] unix_stream_read_generic+0xab8/0xb60
[ 7.013362] stacktrace:
[ 7.013362] __mutex_lock+0x52c/0x900
[ 7.013364] unix_stream_read_generic+0xab8/0xb60
[ 7.013366] unix_stream_recvmsg+0x40/0x50
[ 7.013368] ____sys_recvmsg+0x85/0x190
[ 7.013370] ___sys_recvmsg+0x78/0xb0
[ 7.013371] __sys_recvmsg+0x4b/0x80
[ 7.013373] do_syscall_64+0x3a/0x90
[ 7.013374] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013376]
[ 7.013377] [E] event(&(&ei->socket.wq.wait)->dmap:0):
[ 7.013378] [<ffffffff810baa53>] __wake_up_common+0x93/0x1a0
[ 7.013379] stacktrace:
[ 7.013380] dept_event+0x12b/0x1f0
[ 7.013381] __wake_up_common+0xb0/0x1a0
[ 7.013383] __wake_up_common_lock+0x65/0x90
[ 7.013384] unix_write_space+0x75/0x100
[ 7.013386] sock_wfree+0x68/0xa0
[ 7.013387] unix_destruct_scm+0x66/0x70
[ 7.013389] skb_release_head_state+0x3b/0x90
[ 7.013391] skb_release_all+0x9/0x20
[ 7.013393] consume_skb+0x4c/0xe0
[ 7.013394] unix_stream_read_generic+0xa3c/0xb60
[ 7.013397] unix_stream_recvmsg+0x40/0x50
[ 7.013399] ____sys_recvmsg+0x85/0x190
[ 7.013400] ___sys_recvmsg+0x78/0xb0
[ 7.013402] __sys_recvmsg+0x4b/0x80
[ 7.013403] do_syscall_64+0x3a/0x90
[ 7.013405] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013407] ---------------------------------------------------
[ 7.013407] context B's detail
[ 7.013408] ---------------------------------------------------
[ 7.013408] context B
[ 7.013409] [S] __raw_spin_lock(&u->lock:0)
[ 7.013410] [W] wait(&(&ei->socket.wq.wait)->dmap:0)
[ 7.013411] [E] spin_unlock(&u->lock:0)
[ 7.013412]
[ 7.013412] [S] __raw_spin_lock(&u->lock:0):
[ 7.013413] [<ffffffff81aa451f>] unix_stream_read_generic+0x6bf/0xb60
[ 7.013416] stacktrace:
[ 7.013416] _raw_spin_lock+0x6e/0x90
[ 7.013418] unix_stream_read_generic+0x6bf/0xb60
[ 7.013420] unix_stream_recvmsg+0x40/0x50
[ 7.013422] sock_read_iter+0x85/0xd0
[ 7.013424] new_sync_read+0x162/0x180
[ 7.013426] vfs_read+0xf3/0x190
[ 7.013428] ksys_read+0xa6/0xc0
[ 7.013429] do_syscall_64+0x3a/0x90
[ 7.013431] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013433]
[ 7.013434] [W] wait(&(&ei->socket.wq.wait)->dmap:0):
[ 7.013434] [<ffffffff810bb017>] prepare_to_wait+0x47/0xd0
[ 7.013436] stacktrace:
[ 7.013437] unix_stream_read_generic+0x6fa/0xb60
[ 7.013439] unix_stream_recvmsg+0x40/0x50
[ 7.013441] sock_read_iter+0x85/0xd0
[ 7.013443] new_sync_read+0x162/0x180
[ 7.013445] vfs_read+0xf3/0x190
[ 7.013447] ksys_read+0xa6/0xc0
[ 7.013448] do_syscall_64+0x3a/0x90
[ 7.013449] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013451]
[ 7.013452] [E] spin_unlock(&u->lock:0):
[ 7.013453] [<ffffffff81aa45df>] unix_stream_read_generic+0x77f/0xb60
[ 7.013455] stacktrace:
[ 7.013456] _raw_spin_unlock+0x30/0x70
[ 7.013457] unix_stream_read_generic+0x77f/0xb60
[ 7.013460] unix_stream_recvmsg+0x40/0x50
[ 7.013462] sock_read_iter+0x85/0xd0
[ 7.013464] new_sync_read+0x162/0x180
[ 7.013465] vfs_read+0xf3/0x190
[ 7.013467] ksys_read+0xa6/0xc0
[ 7.013468] do_syscall_64+0x3a/0x90
[ 7.013470] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013472] ---------------------------------------------------
[ 7.013473] context C's detail
[ 7.013473] ---------------------------------------------------
[ 7.013474] context C
[ 7.013474] [S] __mutex_lock_common(&u->iolock:0)
[ 7.013475] [W] __raw_spin_lock(&u->lock:0)
[ 7.013476] [E] mutex_unlock(&u->iolock:0)
[ 7.013477]
[ 7.013478] [S] __mutex_lock_common(&u->iolock:0):
[ 7.013479] [<ffffffff81aa3f40>] unix_stream_read_generic+0xe0/0xb60
[ 7.013481] stacktrace:
[ 7.013482] __mutex_lock+0x54d/0x900
[ 7.013483] unix_stream_read_generic+0xe0/0xb60
[ 7.013486] unix_stream_recvmsg+0x40/0x50
[ 7.013488] ____sys_recvmsg+0x85/0x190
[ 7.013490] ___sys_recvmsg+0x78/0xb0
[ 7.013491] __sys_recvmsg+0x4b/0x80
[ 7.013492] do_syscall_64+0x3a/0x90
[ 7.013494] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013496]
[ 7.013496] [W] __raw_spin_lock(&u->lock:0):
[ 7.013497] [<ffffffff81aa3f92>] unix_stream_read_generic+0x132/0xb60
[ 7.013499] stacktrace:
[ 7.013500] _raw_spin_lock+0x4b/0x90
[ 7.013502] unix_stream_read_generic+0x132/0xb60
[ 7.013504] unix_stream_recvmsg+0x40/0x50
[ 7.013506] ____sys_recvmsg+0x85/0x190
[ 7.013508] ___sys_recvmsg+0x78/0xb0
[ 7.013509] __sys_recvmsg+0x4b/0x80
[ 7.013510] do_syscall_64+0x3a/0x90
[ 7.013512] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013514]
[ 7.013514] [E] mutex_unlock(&u->iolock:0):
[ 7.013515] [<ffffffff81aa4058>] unix_stream_read_generic+0x1f8/0xb60
[ 7.013518] stacktrace:
[ 7.013518] __mutex_unlock_slowpath+0x49/0x2a0
[ 7.013520] unix_stream_read_generic+0x1f8/0xb60
[ 7.013522] unix_stream_recvmsg+0x40/0x50
[ 7.013524] ____sys_recvmsg+0x85/0x190
[ 7.013526] ___sys_recvmsg+0x78/0xb0
[ 7.013527] __sys_recvmsg+0x4b/0x80
[ 7.013528] do_syscall_64+0x3a/0x90
[ 7.013530] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.013532] ---------------------------------------------------
[ 7.013532] information that might be helpful
[ 7.013533] ---------------------------------------------------
[ 7.013534] CPU: 2 PID: 641 Comm: avahi-daemon Tainted: G W 5.17.0-rc1-00014-gcf3441bb2012 #2
[ 7.013535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[ 7.013536] Call Trace:
[ 7.013537] <TASK>
[ 7.013538] dump_stack_lvl+0x44/0x57
[ 7.013540] print_circle+0x384/0x510
[ 7.013542] ? print_circle+0x510/0x510
[ 7.013544] cb_check_dl+0x58/0x60
[ 7.013545] bfs+0xdc/0x1b0
[ 7.013548] add_dep+0x94/0x120
[ 7.013550] do_event.isra.22+0x284/0x300
[ 7.013552] ? __wake_up_common+0x93/0x1a0
[ 7.013553] dept_event+0x12b/0x1f0
[ 7.013555] __wake_up_common+0xb0/0x1a0
[ 7.013557] __wake_up_common_lock+0x65/0x90
[ 7.013559] unix_write_space+0x75/0x100
[ 7.013562] sock_wfree+0x68/0xa0
[ 7.013564] unix_destruct_scm+0x66/0x70
[ 7.013565] skb_release_head_state+0x3b/0x90
[ 7.013568] skb_release_all+0x9/0x20
[ 7.013570] consume_skb+0x4c/0xe0
[ 7.013572] unix_stream_read_generic+0xa3c/0xb60
[ 7.013575] ? prepare_to_wait_exclusive+0xa0/0xa0
[ 7.013577] unix_stream_recvmsg+0x40/0x50
[ 7.013580] ? unix_state_double_unlock+0x40/0x40
[ 7.013582] ____sys_recvmsg+0x85/0x190
[ 7.013584] ? __import_iovec+0xd1/0x140
[ 7.013587] ? import_iovec+0x17/0x20
[ 7.013589] ? copy_msghdr_from_user+0x47/0x60
[ 7.013591] ___sys_recvmsg+0x78/0xb0
[ 7.013593] ? trace_hardirqs_on+0x38/0xe0
[ 7.013595] ? finish_task_switch+0xf3/0x2a0
[ 7.013598] ? __sys_recvmsg+0x4b/0x80
[ 7.013599] __sys_recvmsg+0x4b/0x80
[ 7.013601] do_syscall_64+0x3a/0x90
[ 7.013603] entry_SYSCALL_64_after_hwframe+0x44/0xae
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