On Sat, Nov 14, 2020 at 9:42 AM syzbot <syzbot+5921b7c1b10a0ddd02bc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 96021828 MAINTAINERS/bpf: Update Andrii's entry. > git tree: bpf > console output: https://syzkaller.appspot.com/x/log.txt?x=102717be500000 > kernel config: https://syzkaller.appspot.com/x/.config?x=61033507391c77ff > dashboard link: https://syzkaller.appspot.com/bug?extid=5921b7c1b10a0ddd02bc > compiler: gcc (GCC) 10.1.0-syz 20200507 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+5921b7c1b10a0ddd02bc@xxxxxxxxxxxxxxxxxxxxxxxxx #syz fix: mac80211: free sta in sta_info_insert_finish() on errors > BUG: sleeping function called from invalid context at net/mac80211/sta_info.c:1962 > in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 124, name: kworker/u4:3 > 4 locks held by kworker/u4:3/124: > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243 > #1: ffffc9000132fda8 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247 > #2: ffff88801ab98d00 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1021 [inline] > #2: ffff88801ab98d00 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1683 > #3: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: sta_info_insert_finish net/mac80211/sta_info.c:644 [inline] > #3: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: sta_info_insert_rcu+0x680/0x2ba0 net/mac80211/sta_info.c:732 > Preemption disabled at: > [<ffffffff88e63ecf>] __mutex_lock_common kernel/locking/mutex.c:955 [inline] > [<ffffffff88e63ecf>] __mutex_lock+0x10f/0x10e0 kernel/locking/mutex.c:1103 > CPU: 0 PID: 124 Comm: kworker/u4:3 Not tainted 5.10.0-rc2-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Workqueue: phy4 ieee80211_iface_work > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x107/0x163 lib/dump_stack.c:118 > ___might_sleep.cold+0x1e8/0x22e kernel/sched/core.c:7298 > sta_info_move_state+0x32/0x8d0 net/mac80211/sta_info.c:1962 > sta_info_free+0x65/0x3b0 net/mac80211/sta_info.c:274 > sta_info_insert_rcu+0x303/0x2ba0 net/mac80211/sta_info.c:738 > ieee80211_ibss_finish_sta+0x212/0x390 net/mac80211/ibss.c:592 > ieee80211_ibss_work+0x2c7/0xe80 net/mac80211/ibss.c:1700 > ieee80211_iface_work+0x82e/0x970 net/mac80211/iface.c:1476 > process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 > worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 > kthread+0x3af/0x4a0 kernel/kthread.c:292 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 > > ============================= > [ BUG: Invalid wait context ] > 5.10.0-rc2-syzkaller #0 Tainted: G W > ----------------------------- > kworker/u4:3/124 is trying to lock: > ffff888035f2a9d0 (&local->chanctx_mtx){+.+.}-{3:3}, at: ieee80211_recalc_min_chandef+0x49/0x140 net/mac80211/util.c:2740 > other info that might help us debug this: > context-{4:4} > 4 locks held by kworker/u4:3/124: > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] > #0: ffff888035f48938 ((wq_completion)phy4){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243 > #1: ffffc9000132fda8 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247 > #2: ffff88801ab98d00 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1021 [inline] > #2: ffff88801ab98d00 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1683 > #3: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: sta_info_insert_finish net/mac80211/sta_info.c:644 [inline] > #3: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: sta_info_insert_rcu+0x680/0x2ba0 net/mac80211/sta_info.c:732 > stack backtrace: > CPU: 0 PID: 124 Comm: kworker/u4:3 Tainted: G W 5.10.0-rc2-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Workqueue: phy4 ieee80211_iface_work > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x107/0x163 lib/dump_stack.c:118 > print_lock_invalid_wait_context kernel/locking/lockdep.c:4483 [inline] > check_wait_context kernel/locking/lockdep.c:4544 [inline] > __lock_acquire.cold+0x310/0x3a2 kernel/locking/lockdep.c:4781 > lock_acquire kernel/locking/lockdep.c:5436 [inline] > lock_acquire+0x2a3/0x8c0 kernel/locking/lockdep.c:5401 > __mutex_lock_common kernel/locking/mutex.c:956 [inline] > __mutex_lock+0x134/0x10e0 kernel/locking/mutex.c:1103 > ieee80211_recalc_min_chandef+0x49/0x140 net/mac80211/util.c:2740 > sta_info_move_state+0x3cf/0x8d0 net/mac80211/sta_info.c:2019 > sta_info_free+0x65/0x3b0 net/mac80211/sta_info.c:274 > sta_info_insert_rcu+0x303/0x2ba0 net/mac80211/sta_info.c:738 > ieee80211_ibss_finish_sta+0x212/0x390 net/mac80211/ibss.c:592 > ieee80211_ibss_work+0x2c7/0xe80 net/mac80211/ibss.c:1700 > ieee80211_iface_work+0x82e/0x970 net/mac80211/iface.c:1476 > process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 > worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 > kthread+0x3af/0x4a0 kernel/kthread.c:292 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/00000000000081bcd205b40d1f44%40google.com.
