syzkaller login: [ 30.515729] BUG: Bad rss-counter state mm:00000000b50a855a type:MM_FILEPAGES val:33 [ 30.516896] BUG: Bad rss-counter state mm:00000000b50a855a type:MM_ANONPAGES val:22 [ 30.667091] ================================================================== [ 30.668178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.669323] Read of size 8 at addr ffff888015aa0880 by task sshd/220 [ 30.670191] [ 30.670410] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.671284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.672311] Call Trace: [ 30.672633] [ 30.672929] dump_stack_lvl+0x91/0xf0 [ 30.673424] print_report+0xcc/0x620 [ 30.673912] ? __virt_addr_valid+0x102/0x340 [ 30.674478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675722] kasan_report+0xbe/0xf0 [ 30.676200] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676827] vma_interval_tree_remove+0xc75/0xec0 [ 30.677429] vma_prepare+0xc54/0x11a0 [ 30.677900] __split_vma+0x5af/0x950 [ 30.678374] ? __pfx___split_vma+0x10/0x10 [ 30.678898] ? find_held_lock+0x2c/0x110 [ 30.679423] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.679991] ? lock_is_held_type+0x9f/0x120 [ 30.680526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.681159] ? mtree_range_walk+0x632/0x900 [ 30.681709] ? mas_walk+0x5c7/0x7c0 [ 30.682182] do_vmi_munmap+0x1f1/0x2b0 [ 30.682675] mmap_region+0x1f9/0x2660 [ 30.683155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.683670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.684374] ? __pfx_lock_acquire+0x10/0x10 [ 30.684914] ? __pfx_mmap_region+0x10/0x10 [ 30.685452] ? security_mmap_addr+0x7d/0xa0 [ 30.685979] ? get_unmapped_area+0x1f5/0x3f0 [ 30.686536] do_mmap+0x854/0xf00 [ 30.686972] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.687463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.688022] ksys_mmap_pgoff+0x3af/0x500 [ 30.688526] do_syscall_64+0x3f/0x90 [ 30.689007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689656] RIP: 0033:0x7f4c55f54d82 [ 30.690115] 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 [ 30.692237] RSP: 002b:00007ffdcec445c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.693158] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c55f54d82 [ 30.694010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c5538e000 [ 30.694848] RBP: 00007f4c5538e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.695692] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559fa7f71980 [ 30.696533] R13: 00007ffdcec445e0 R14: 00007ffdcec44610 R15: 00007ffdcec44970 [ 30.697399] [ 30.697690] [ 30.697904] Allocated by task 213: [ 30.698329] kasan_save_stack+0x22/0x50 [ 30.698828] kasan_set_track+0x25/0x30 [ 30.699318] __kasan_slab_alloc+0x59/0x70 [ 30.699840] kmem_cache_alloc+0x16b/0x370 [ 30.700359] vm_area_dup+0x20/0x160 [ 30.700818] __split_vma+0x170/0x950 [ 30.701280] split_vma+0xc6/0x110 [ 30.701722] mprotect_fixup+0x8d2/0xb30 [ 30.702223] do_mprotect_pkey+0x87e/0xd40 [ 30.702740] __x64_sys_mprotect+0x78/0xc0 [ 30.703256] do_syscall_64+0x3f/0x90 [ 30.703727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704371] [ 30.704585] Freed by task 213: [ 30.704991] kasan_save_stack+0x22/0x50 [ 30.705500] kasan_set_track+0x25/0x30 [ 30.705989] kasan_save_free_info+0x2b/0x50 [ 30.706520] __kasan_slab_free+0x10a/0x190 [ 30.707052] kmem_cache_free+0x10d/0x4d0 [ 30.707562] rcu_core+0x8c8/0x2860 [ 30.708004] __do_softirq+0x1b7/0x7d4 [ 30.708484] [ 30.708699] Last potentially related work creation: [ 30.709282] kasan_save_stack+0x22/0x50 [ 30.709789] __kasan_record_aux_stack+0x8e/0xa0 [ 30.710359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.711002] remove_vma+0x139/0x170 [ 30.711450] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.712004] do_vmi_munmap+0x1f1/0x2b0 [ 30.712486] __vm_munmap+0x138/0x3a0 [ 30.712951] __x64_sys_munmap+0x59/0x80 [ 30.713451] do_syscall_64+0x3f/0x90 [ 30.713924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714567] [ 30.714780] The buggy address belongs to the object at ffff888015aa0828 [ 30.714780] which belongs to the cache vm_area_struct of size 168 [ 30.716242] The buggy address is located 88 bytes inside of [ 30.716242] freed 168-byte region [ffff888015aa0828, ffff888015aa08d0) [ 30.717661] [ 30.717876] The buggy address belongs to the physical page: [ 30.718533] page:0000000011823024 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15aa0 [ 30.719613] memcg:ffff888019f11b01 [ 30.720033] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.720674] page_type: 0xffffffff() [ 30.721126] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.722030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f11b01 [ 30.722930] page dumped because: kasan: bad access detected [ 30.723590] [ 30.723803] Memory state around the buggy address: [ 30.724380] ffff888015aa0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.725244] ffff888015aa0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.726089] >ffff888015aa0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.726935] ^ [ 30.727355] ffff888015aa0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.728206] ffff888015aa0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.729062] ================================================================== [ 30.730046] Disabling lock debugging due to kernel taint [ 32.818309] BUG: Bad rss-counter state mm:000000003528abac type:MM_FILEPAGES val:33 [ 32.819296] BUG: Bad rss-counter state mm:000000003528abac type:MM_ANONPAGES val:22 [ 33.362149] BUG: Bad rss-counter state mm:000000009ab4087f type:MM_FILEPAGES val:33 [ 33.363302] BUG: Bad rss-counter state mm:000000009ab4087f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63221' (ECDSA) to the list of known hosts. 2023/06/20 19:27:00 fuzzer started 2023/06/20 19:27:00 dialing manager at localhost:36067 2023/06/20 19:27:00 checking machine... 2023/06/20 19:27:00 checking revisions... [ 33.987757] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:27:00 testing simple program... [ 34.040630] cgroup: Unknown subsys name 'net' [ 34.101940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:00 Registers: info registers vcpu 0 RAX=1ffffffff0bb40fd RBX=ffffffff85da07ec RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860aca3e RDI=ffffffff85da07e8 RBP=ffffffff85da07e8 RSP=ffff88806ce099b8 R8 =ffffffff860aca3e R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85da07f4 R13=ffffffff85da07e8 R14=ffffffff85da07e8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f3d68a21900 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=0000561fba1e3568 CR3=000000000c65a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b086551ac4787c5f00000000000ae988 XMM05=ecaf26250d2261ac0000000000132418 XMM06=19e9129bd510f23500000000001311f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800e46fde8 RSI=ffff88800e46fdc8 RDI=ffff88800e46fa90 RBP=ffff88800e46fb18 RSP=ffff88800e46fa70 R8 =0000000000000001 R9 =ffff88800e46fac0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88800e46fb48 R13=0000000000000000 R14=ffff8880159f51c0 R15=ffff88800e46fa80 RIP=ffffffff81130937 RFL=00000286 [--S--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 00007f8bf5736900 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=00007f8bf5ceb650 CR3=00000000164d4000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000