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0432b2183f
If the callout gets rescheduled during detach, we might access freed pcm_channel resources in dummy_chan_io(), which will cause a panic similar to this: panic: ASan: Invalid access, 8-byte read at 0xfffffe00479f65d8, UMAUseAfterFree(fd) cpuid = 1 time = 1747433047 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xa5/frame 0xfffffe0046a8d730 kdb_backtrace() at kdb_backtrace+0xc6/frame 0xfffffe0046a8d890 vpanic() at vpanic+0x226/frame 0xfffffe0046a8da30 panic() at panic+0xb5/frame 0xfffffe0046a8db00 kasan_code_name() at kasan_code_name/frame 0xfffffe0046a8dbd0 __mtx_lock_flags() at __mtx_lock_flags+0xd3/frame 0xfffffe0046a8dcc0 chn_intr() at chn_intr+0x3d/frame 0xfffffe0046a8dce0 dummy_chan_io() at dummy_chan_io+0x9c/frame 0xfffffe0046a8dd10 softclock_call_cc() at softclock_call_cc+0x2bb/frame 0xfffffe0046a8de80 softclock_thread() at softclock_thread+0x162/frame 0xfffffe0046a8def0 fork_exit() at fork_exit+0xa3/frame 0xfffffe0046a8df30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0046a8df30 Reviewed by: adrian Differential Revision: https://reviews.freebsd.org/D50386 |
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| .. | ||
| fdt | ||
| isa | ||
| macio | ||
| midi | ||
| pci | ||
| pcm | ||
| usb | ||
| driver.c | ||
| dummy.c | ||