RAX: 0000000000000000 RBX: 00007f57dbdfff10 RCX: 0000000000000002 RDX: 0000000000024da0 RSI: 0000000000024da0 RDI: 00007f57dbe00000 RBP: 00000000021c3eb0 R08: 0000000000000000 R09: 00000000021c4116 R10: 0000000000000001 R11: 0000000000000100 R12: 0000000000000001 R13: 0000000000000064 R14: 00000000021c4320 R15: 00000000021c40e6 Kernel panic - not syncing: corrupted stack end detected inside scheduler CPU: 0 PID: 25929 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #157 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 schedule_debug kernel/sched/core.c:3285 [inline] __schedule+0x21c6/0x21d0 kernel/sched/core.c:3394 Mem-Info: preempt_schedule_irq+0xb9/0x140 kernel/sched/core.c:3699 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:queue_work_on+0x17a/0x1e0 kernel/workqueue.c:1490 active_anon:1355073 inactive_anon:8384 isolated_anon:0 active_file:32 inactive_file:38 isolated_file:38 unevictable:1024 dirty:0 writeback:0 unstable:0 slab_reclaimable:14078 slab_unreclaimable:112809 mapped:49205 shmem:473 pagetables:9109 bounce:0 free:24179 free_pcp:100 free_cma:0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 73 48 83 3d e2 b7 00 08 00 74 44 e8 5b 3b 2e 00 48 89 df 57 9d <0f> 1f 44 00 00 eb a6 e8 4a 3b 2e 00 8b 7d d4 4c 89 e2 4c 89 fe 41 Node 0 active_anon:5420292kB inactive_anon:33536kB active_file:128kB inactive_file:152kB unevictable:4096kB isolated(anon):0kB isolated(file):152kB mapped:196820kB dirty:0kB writeback:0kB shmem:1892kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 194560kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no RSP: 0018:ffff888181a54c30 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff888184ec8540 RBX: 0000000000000293 RCX: 1ffff110309d91cb RDX: 0000000000000000 RSI: ffffffff81514915 RDI: 0000000000000293 RBP: ffff888181a54c60 R08: ffff888184ec8e58 R09: 0000000000000007 R10: 0000000000000000 R11: ffff888184ec8540 R12: 0000000000000200 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881da8177c0 queue_work include/linux/workqueue.h:512 [inline] schedule_work include/linux/workqueue.h:570 [inline] vmpressure+0x271/0x340 mm/vmpressure.c:281 Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB vmpressure_prio+0x44/0x50 mm/vmpressure.c:342 do_try_to_free_pages+0x1ff/0x1290 mm/vmscan.c:3046 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3264 lowmem_reserve[]: 0 2818 6321 6321 __perform_reclaim mm/page_alloc.c:3773 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3795 [inline] __alloc_pages_slowpath+0xa48/0x2de0 mm/page_alloc.c:4185 Node 0 DMA32 free:44004kB min:30052kB low:37564kB high:45076kB active_anon:2784992kB inactive_anon:320kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888780kB mlocked:0kB kernel_stack:4416kB pagetables:8352kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:37204kB min:37364kB low:46704kB high:56044kB active_anon:2635200kB inactive_anon:33216kB active_file:128kB inactive_file:0kB unevictable:4096kB writepending:0kB present:4718592kB managed:3587816kB mlocked:4096kB kernel_stack:16832kB pagetables:28084kB bounce:0kB free_pcp:68kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 575*4kB (UME) 213*8kB (UME) 76*16kB (UE) 20*32kB (UME) 2*64kB (U) 1*128kB (U) 0*256kB 2*512kB (UE) 2*1024kB (UM) 1*2048kB (E) 8*4096kB (M) = 44004kB Node 0 Normal: 1205*4kB (UMEH) 2365*8kB (UMEH) 679*16kB (UMEH) 80*32kB (UME) 5*64kB (UM) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 37484kB __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB alloc_pages_current+0x173/0x350 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x38c/0x5c0 mm/filemap.c:924 539 total pagecache pages pagecache_get_page+0x396/0xf00 mm/filemap.c:1554 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:947 [inline] grow_buffers fs/buffer.c:1016 [inline] __getblk_slow fs/buffer.c:1043 [inline] __getblk_gfp+0x3aa/0xd50 fs/buffer.c:1320 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved Out of memory: Kill process 8756 (syz-executor2) score 1007 or sacrifice child sb_getblk_gfp include/linux/buffer_head.h:332 [inline] __read_extent_tree_block+0x11d/0xab0 fs/ext4/extents.c:509 Killed process 8756 (syz-executor2) total-vm:70472kB, anon-rss:18068kB, file-rss:32640kB, shmem-rss:0kB oom_reaper: reaped process 8756 (syz-executor2), now anon-rss:0kB, file-rss:32640kB, shmem-rss:0kB ext4_find_extent+0x38a/0x9b0 fs/ext4/extents.c:908 ext4_ext_map_blocks+0x291/0x48f0 fs/ext4/extents.c:4223 ext4_da_map_blocks fs/ext4/inode.c:1899 [inline] ext4_da_get_block_prep+0xe46/0x1550 fs/ext4/inode.c:1976 ext4_block_write_begin+0x6f9/0x1870 fs/ext4/inode.c:1193 ext4_da_write_begin+0x43b/0x12c0 fs/ext4/inode.c:3108 generic_perform_write+0x3aa/0x6a0 mm/filemap.c:3140 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3265 ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 __kernel_write+0x10c/0x370 fs/read_write.c:506 do_acct_process+0x1144/0x1660 kernel/acct.c:520 slow_acct_process kernel/acct.c:579 [inline] acct_process+0x6b1/0x875 kernel/acct.c:605 do_exit+0x1b89/0x26d0 kernel/exit.c:857 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: Bad RIP value. RSP: 002b:00007fb052941c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000020000040 RSI: 0000000000008914 RDI: 000000000000000c RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb0529426d4 R13: 00000000004c277c R14: 00000000004d4758 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..