On 02/09/2017 03:46 PM, Tobias Regnery wrote: > Hi, > > I hit a soft lockup with 4.10-rc7 on ervery boot: >
... > [ 32.452189] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! > [swapper/0:1] > [ 32.452300] Modules linked in: > [ 32.452388] CPU: 3 PID: 1 Comm: swapper/0 Tainted: G L > 4.10.0-rc7-kasan #27 > [ 32.452504] Hardware name: LENOVO Lenovo IdeaPad N581/INVALID, BIOS > 5ECN96WW(V9.01) 03/14/2013 > [ 32.452621] task: ffff88010a268000 task.stack: ffff88010a270000 > [ 32.452711] RIP: 0010:note_page+0x781/0xa60 > [ 32.452792] RSP: 0018:ffff88010a277d30 EFLAGS: 00000287 ORIG_RAX: > ffffffffffffff10 > [ 32.452911] RAX: fffffbfff228dde7 RBX: ffff88010a277e40 RCX: > ffffffff900a3947 > [ 32.453000] RDX: dffffc0000000000 RSI: ffff88010a277e40 RDI: > ffffffff9146ef38 > [ 32.453087] RBP: ffff88010a277da0 R08: 1ffffffff2290598 R09: > ffffffff91b1a952 > [ 32.453173] R10: ffff8800bf3fffff R11: fffffbfff236352b R12: > 8000000000000161 > [ 32.453261] R13: 0000000000000000 R14: ffffffff9146ef20 R15: > fffff698470e8000 > [ 32.453350] FS: 0000000000000000(0000) GS:ffff88010b2c0000(0000) > knlGS:0000000000000000 > [ 32.453467] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 32.453551] CR2: ffffffff90e40ea0 CR3: 00000000bf40d000 CR4: > 00000000001406e0 > [ 32.453636] Call Trace: > [ 32.453718] ptdump_walk_pgd_level_core+0x40c/0x550 > [ 32.453804] ? note_page+0xa60/0xa60 > [ 32.453890] ? free_reserved_area+0x131/0x140 > [ 32.453975] ? 0xffffffff90000000 > [ 32.454058] ptdump_walk_pgd_level_checkwx+0x17/0x20 > [ 32.454147] mark_rodata_ro+0x13b/0x150 > [ 32.454234] ? rest_init+0x90/0x90 > [ 32.454318] kernel_init+0x2f/0x120 > [ 32.454400] ? rest_init+0x90/0x90 > [ 32.454482] ret_from_fork+0x2c/0x40 Yeah, that's ptdump walks too long across huge KASAN shadow memory without rescheduling. Patch to fix this will follow shortly.
