syzkaller login: [ 30.333289] BUG: Bad rss-counter state mm:000000001816ddfd type:MM_FILEPAGES val:33 [ 30.334759] BUG: Bad rss-counter state mm:000000001816ddfd type:MM_ANONPAGES val:22 [ 30.491572] ================================================================== [ 30.492538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.493471] Read of size 8 at addr ffff888015d0c6b0 by task sshd/221 [ 30.494323] [ 30.494542] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.495398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.496407] Call Trace: [ 30.496730] [ 30.497012] dump_stack_lvl+0x91/0xf0 [ 30.497511] print_report+0xcc/0x620 [ 30.497987] ? __virt_addr_valid+0x102/0x340 [ 30.498538] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499791] kasan_report+0xbe/0xf0 [ 30.500267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500898] vma_interval_tree_remove+0xc75/0xec0 [ 30.501514] vma_prepare+0xc54/0x11a0 [ 30.501994] __split_vma+0x5af/0x950 [ 30.502463] ? __pfx___split_vma+0x10/0x10 [ 30.502995] ? find_held_lock+0x2c/0x110 [ 30.503516] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.504096] ? lock_is_held_type+0x9f/0x120 [ 30.504638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.505243] ? mtree_range_walk+0x632/0x900 [ 30.505795] ? mas_walk+0x5c7/0x7c0 [ 30.506267] do_vmi_munmap+0x1f1/0x2b0 [ 30.506763] mmap_region+0x1f9/0x2660 [ 30.507257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.507781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.508497] ? __pfx_lock_acquire+0x10/0x10 [ 30.509030] ? __pfx_mmap_region+0x10/0x10 [ 30.509561] ? security_mmap_addr+0x7d/0xa0 [ 30.510091] ? get_unmapped_area+0x1f5/0x3f0 [ 30.510643] do_mmap+0x854/0xf00 [ 30.511084] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.511578] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.512159] ksys_mmap_pgoff+0x3af/0x500 [ 30.512666] do_syscall_64+0x3f/0x90 [ 30.513148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513795] RIP: 0033:0x7f8b9b84ed82 [ 30.514256] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.516367] RSP: 002b:00007fffee6dc298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.517286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b9b84ed82 [ 30.518132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b9ac88000 [ 30.518975] RBP: 00007f8b9ac88000 R08: 0000000000000009 R09: 0000000000001000 [ 30.519833] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632ad3f8ec0 [ 30.520670] R13: 00007fffee6dc2b0 R14: 00007fffee6dc2e0 R15: 00007fffee6dc640 [ 30.521528] [ 30.521822] [ 30.522038] Allocated by task 214: [ 30.522465] kasan_save_stack+0x22/0x50 [ 30.522965] kasan_set_track+0x25/0x30 [ 30.523459] __kasan_slab_alloc+0x59/0x70 [ 30.524000] kmem_cache_alloc+0x16b/0x370 [ 30.524509] vm_area_dup+0x20/0x160 [ 30.524962] __split_vma+0x170/0x950 [ 30.525426] split_vma+0xc6/0x110 [ 30.525879] mprotect_fixup+0x8d2/0xb30 [ 30.526385] do_mprotect_pkey+0x87e/0xd40 [ 30.526902] __x64_sys_mprotect+0x78/0xc0 [ 30.527424] do_syscall_64+0x3f/0x90 [ 30.527901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.528543] [ 30.528761] Freed by task 214: [ 30.529155] kasan_save_stack+0x22/0x50 [ 30.529659] kasan_set_track+0x25/0x30 [ 30.530145] kasan_save_free_info+0x2b/0x50 [ 30.530683] __kasan_slab_free+0x10a/0x190 [ 30.531212] kmem_cache_free+0x10d/0x4d0 [ 30.531736] rcu_core+0x8c8/0x2860 [ 30.532210] __do_softirq+0x1b7/0x7d4 [ 30.532692] [ 30.532906] Last potentially related work creation: [ 30.533488] kasan_save_stack+0x22/0x50 [ 30.533991] __kasan_record_aux_stack+0x8e/0xa0 [ 30.534563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.535204] remove_vma+0x139/0x170 [ 30.535670] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.536223] do_vmi_munmap+0x1f1/0x2b0 [ 30.536709] __vm_munmap+0x138/0x3a0 [ 30.537177] __x64_sys_munmap+0x59/0x80 [ 30.537674] do_syscall_64+0x3f/0x90 [ 30.538152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.538788] [ 30.539003] The buggy address belongs to the object at ffff888015d0c658 [ 30.539003] which belongs to the cache vm_area_struct of size 168 [ 30.540481] The buggy address is located 88 bytes inside of [ 30.540481] freed 168-byte region [ffff888015d0c658, ffff888015d0c700) [ 30.541863] [ 30.542079] The buggy address belongs to the physical page: [ 30.542729] page:000000003e8ebd8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d0c [ 30.543817] memcg:ffff88800ee97d01 [ 30.544258] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.544895] page_type: 0xffffffff() [ 30.545351] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.546264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee97d01 [ 30.547157] page dumped because: kasan: bad access detected [ 30.547856] [ 30.548072] Memory state around the buggy address: [ 30.548652] ffff888015d0c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.549490] ffff888015d0c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.550342] >ffff888015d0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.551184] ^ [ 30.551776] ffff888015d0c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.552611] ffff888015d0c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.553444] ================================================================== [ 30.554448] Disabling lock debugging due to kernel taint [ 32.691257] BUG: Bad rss-counter state mm:000000007fd71143 type:MM_FILEPAGES val:33 [ 32.692341] BUG: Bad rss-counter state mm:000000007fd71143 type:MM_ANONPAGES val:22 [ 33.240848] BUG: Bad rss-counter state mm:0000000099c54a60 type:MM_FILEPAGES val:33 [ 33.242090] BUG: Bad rss-counter state mm:0000000099c54a60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39363' (ECDSA) to the list of known hosts. 2023/06/21 04:36:23 fuzzer started 2023/06/21 04:36:23 dialing manager at localhost:36067 2023/06/21 04:36:23 checking machine... 2023/06/21 04:36:23 checking revisions... [ 33.853593] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:36:23 testing simple program... [ 33.914982] cgroup: Unknown subsys name 'net' [ 33.955698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:23 Registers: info registers vcpu 0 RAX=1ffffffff0a92574 RBX=ffffffff85d3e490 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff848ff1e0 RDI=ffffffff87b89c40 RBP=ffffffff87b89c40 RSP=ffff8880178b78d0 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88801a1eb850 RIP=ffffffff812c19de RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7072ee5700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe110b3ec70 CR3=0000000017bca000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2032323a36333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a36333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016671b40 RSI=ffffffff81493c94 RDI=0000000000000003 RBP=ffff88800e970dc0 RSP=ffff88801034f888 R8 =0000000000000003 R9 =0000000000000bb7 R10=0000000000000452 R11=0000000000000001 R12=0000000000000452 R13=00000000000000e4 R14=00000000000000f4 R15=0000000000000452 RIP=ffffffff81493c9a RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007eff4988f900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc6a408000 CR3=0000000019c9c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000