Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/timer-sun4i: Advertise a real minimum delta sun4i_clkevt_next_event() compensates for the timer stop/start synchronization delay by programming evt - TIMER_SYNC_TICKS into the hardware interval register. The clockevent device currently advertises TIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed to call set_next_event() with evt == TIMER_SYNC_TICKS. That programs a zero-tick interval. With oneshot/highres/nohz timer operation this can leave the next event stuck, which was observed as a boot hang on Allwinner D1 after the clockevents core started reusing forced minimum-delta events. Advertise one extra tick instead, so the smallest event accepted by the core still programs at least one hardware tick after the synchronization compensation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 12e1480bcb4920c1b02b3793cb48756497919a60 before 0cc4b14d7401d50e53a01f1554147ee075ee6943; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before 53a3bc024b8e5d284468cce84957cded5f859f98; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before 753a220084dfc4d737f2ab9eaddc9a01a397edd7; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before 151eb52f8712017c8f7b00bb2305e8916cb9e3dc; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before bf38be01d43c4e4ca903aff7236d8486a950a252; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before f0efafcdf6eec1f3361bfd8c811420198f55c8bb; affected 12e1480bcb4920c1b02b3793cb48756497919a60 before d21808328225ab8cee46885bf9a0dffcefbe630e |
| Linux / Linux | affected 3.13; unaffected 0 before 3.13; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943
- https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98
- https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7
- https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
- https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc
- https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252
- https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb
- https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e