bisecting fixing commit since 893af1c79e42e53af0da22165b46eea135af0613 building syzkaller on acb51638141ff960f547431757130749bc176bc0 testing commit 893af1c79e42e53af0da22165b46eea135af0613 with gcc (GCC) 8.1.0 kernel signature: 674076fff8700b9d33d26806ab224db08e82678e59fecf861304d2de29c26cdd all runs: crashed: WARNING in corrupted testing current HEAD 13d2ce42de8cb98ff952f8de6307f896203854c2 testing commit 13d2ce42de8cb98ff952f8de6307f896203854c2 with gcc (GCC) 8.1.0 kernel signature: cc9f2dd9b6279ae6767f594aab7aea5938d4ac8162e850de12f610312ced1970 run #0: crashed: WARNING in unmap_single_vma run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in untrack_pfn run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in untrack_pfn run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in corrupted run #9: crashed: WARNING in corrupted revisions tested: 2, total time: 24m15.900023496s (build: 17m42.321678455s, test: 5m30.931909821s) the crash still happens on HEAD commit msg: Linux 4.19.163 crash: WARNING in corrupted RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1409d326d4 R13: 00000000004bfd66 R14: 00000000004d1ab8 R15: 0000000000000004 CPU: 1 PID: 6786 Comm: syz-executor.2 Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 WARNING: CPU: 0 PID: 6783 at arch/x86/mm/pat.c:1064 untrack_pfn+0x1cb/0x240 arch/x86/mm/pat.c:1073 Call Trace: Kernel panic - not syncing: panic_on_warn set ... __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc_trace+0x2d4/0x740 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] reserve_memtype+0x166/0x710 arch/x86/mm/pat.c:595 reserve_pfn_range+0x12b/0x350 arch/x86/mm/pat.c:912 track_pfn_copy+0x173/0x1b0 arch/x86/mm/pat.c:981 copy_page_range+0xefa/0x1810 mm/memory.c:1258 dup_mmap kernel/fork.c:549 [inline] dup_mm kernel/fork.c:1288 [inline] copy_mm kernel/fork.c:1344 [inline] copy_process.part.34+0x39b7/0x7690 kernel/fork.c:1916 copy_process kernel/fork.c:1722 [inline] _do_fork+0x16a/0xcb0 kernel/fork.c:2228 __do_sys_clone kernel/fork.c:2335 [inline] __se_sys_clone kernel/fork.c:2329 [inline] __x64_sys_clone+0xba/0x140 kernel/fork.c:2329 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598a9 Code: 7d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8bf9433c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f8bf9433c90 RCX: 00000000004598a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8bf94346d4 R13: 00000000004bfd66 R14: 00000000004d1ab8 R15: 0000000000000004 CPU: 0 PID: 6783 Comm: syz-executor.4 Not tainted 4.19.163-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.8+0x1b/0x3e kernel/panic.c:541 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:untrack_pfn+0x1cb/0x240 arch/x86/mm/pat.c:1064 Code: 00 00 00 48 c7 43 08 00 00 00 00 48 8b 45 d8 65 48 33 04 25 28 00 00 00 75 14 48 81 c4 b0 00 00 00 5b 41 5c 41 5d 41 5e 5d c3 <0f> 0b eb c1 e8 9c a5 0d 00 48 89 95 30 ff ff ff 48 89 b5 38 ff ff RSP: 0018:ffff8881cb5af8c0 EFLAGS: 00010282 RAX: 00000000ffffffea RBX: 1ffff110396b5f1a RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffffffff89c8b6a0 RBP: ffff8881cb5af990 R08: ffffed103c758e6f R09: ffffed103c758e6e R10: ffffed103c758e6e R11: ffff8881e3ac7373 R12: ffff8881d7db7210 R13: 0000000000000000 R14: ffff8881cb5af970 R15: ffff8881cb5afa60 unmap_single_vma+0x144/0x300 mm/memory.c:1547 unmap_vmas+0xe7/0x1a0 mm/memory.c:1598 exit_mmap+0x251/0x470 mm/mmap.c:3093 __mmput kernel/fork.c:1015 [inline] mmput+0x107/0x3f0 kernel/fork.c:1036 dup_mm kernel/fork.c:1304 [inline] copy_mm kernel/fork.c:1344 [inline] copy_process.part.34+0x2c97/0x7690 kernel/fork.c:1916 copy_process kernel/fork.c:1722 [inline] _do_fork+0x16a/0xcb0 kernel/fork.c:2228 __do_sys_clone kernel/fork.c:2335 [inline] __se_sys_clone kernel/fork.c:2329 [inline] __x64_sys_clone+0xba/0x140 kernel/fork.c:2329 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598a9 Code: 7d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe142505c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fe142505c90 RCX: 00000000004598a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe1425066d4 R13: 00000000004bfd66 R14: 00000000004d1ab8 R15: 0000000000000004 CPU: 1 PID: 6789 Comm: syz-executor.5 Not tainted 4.19.163-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc_trace+0x2d4/0x740 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] reserve_memtype+0x166/0x710 arch/x86/mm/pat.c:595 reserve_pfn_range+0x12b/0x350 arch/x86/mm/pat.c:912 track_pfn_copy+0x173/0x1b0 arch/x86/mm/pat.c:981 copy_page_range+0xefa/0x1810 mm/memory.c:1258 dup_mmap kernel/fork.c:549 [inline] dup_mm kernel/fork.c:1288 [inline] copy_mm kernel/fork.c:1344 [inline] copy_process.part.34+0x39b7/0x7690 kernel/fork.c:1916 copy_process kernel/fork.c:1722 [inline] _do_fork+0x16a/0xcb0 kernel/fork.c:2228 __do_sys_clone kernel/fork.c:2335 [inline] __se_sys_clone kernel/fork.c:2329 [inline] __x64_sys_clone+0xba/0x140 kernel/fork.c:2329 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598a9 Code: 7d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff02f4e2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ff02f4e2c90 RCX: 00000000004598a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff02f4e36d4 R13: 00000000004bfd66 R14: 00000000004d1ab8 R15: 0000000000000004 Kernel Offset: disabled Rebooting in 86400 seconds..