syzkaller login: [ 54.248135] BUG: Bad rss-counter state mm:000000006bdd10b9 type:MM_FILEPAGES val:33 [ 54.249434] BUG: Bad rss-counter state mm:000000006bdd10b9 type:MM_ANONPAGES val:22 [ 54.404575] ================================================================== [ 54.405532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.406533] Read of size 8 at addr ffff88800e94b058 by task sshd/219 [ 54.407455] [ 54.407699] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.408618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.409678] Call Trace: [ 54.410018] [ 54.410317] dump_stack_lvl+0x91/0xf0 [ 54.410834] print_report+0xcc/0x620 [ 54.411359] ? __virt_addr_valid+0x102/0x340 [ 54.411972] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.412629] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.413288] kasan_report+0xbe/0xf0 [ 54.413790] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.414449] vma_interval_tree_remove+0xc75/0xec0 [ 54.415098] vma_prepare+0xc54/0x11a0 [ 54.415610] __split_vma+0x5af/0x950 [ 54.416135] ? __pfx___split_vma+0x10/0x10 [ 54.416702] ? find_held_lock+0x2c/0x110 [ 54.417261] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.417858] ? lock_is_held_type+0x9f/0x120 [ 54.418439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.419088] ? mtree_range_walk+0x632/0x900 [ 54.419698] ? mas_walk+0x5c7/0x7c0 [ 54.420209] do_vmi_munmap+0x1f1/0x2b0 [ 54.420737] mmap_region+0x1f9/0x2660 [ 54.421256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.421813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.422578] ? __pfx_lock_acquire+0x10/0x10 [ 54.423154] ? __pfx_mmap_region+0x10/0x10 [ 54.423729] ? security_mmap_addr+0x7d/0xa0 [ 54.424304] ? get_unmapped_area+0x1f5/0x3f0 [ 54.424894] do_mmap+0x854/0xf00 [ 54.425374] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.425910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.426516] ksys_mmap_pgoff+0x3af/0x500 [ 54.427059] do_syscall_64+0x3f/0x90 [ 54.427569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.428281] RIP: 0033:0x7f1c51b7cd82 [ 54.428770] 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 [ 54.431052] RSP: 002b:00007ffdf7efc778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.432024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c51b7cd82 [ 54.432934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c50fb6000 [ 54.433836] RBP: 00007f1c50fb6000 R08: 0000000000000009 R09: 0000000000001000 [ 54.434741] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad40bbcd90 [ 54.435644] R13: 00007ffdf7efc790 R14: 00007ffdf7efc7c0 R15: 00007ffdf7efcb20 [ 54.436586] [ 54.436896] [ 54.437126] Allocated by task 212: [ 54.437582] kasan_save_stack+0x22/0x50 [ 54.438131] kasan_set_track+0x25/0x30 [ 54.438673] __kasan_slab_alloc+0x59/0x70 [ 54.439231] kmem_cache_alloc+0x16b/0x370 [ 54.439782] vm_area_dup+0x20/0x160 [ 54.440266] __split_vma+0x170/0x950 [ 54.440768] split_vma+0xc6/0x110 [ 54.441231] mprotect_fixup+0x8d2/0xb30 [ 54.441774] do_mprotect_pkey+0x87e/0xd40 [ 54.442343] __x64_sys_mprotect+0x78/0xc0 [ 54.442908] do_syscall_64+0x3f/0x90 [ 54.443414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.444108] [ 54.444341] Freed by task 212: [ 54.444765] kasan_save_stack+0x22/0x50 [ 54.445312] kasan_set_track+0x25/0x30 [ 54.445841] kasan_save_free_info+0x2b/0x50 [ 54.446409] __kasan_slab_free+0x10a/0x190 [ 54.446977] kmem_cache_free+0x10d/0x4d0 [ 54.447520] rcu_core+0x8c8/0x2860 [ 54.448009] __do_softirq+0x1b7/0x7d4 [ 54.448519] [ 54.448749] Last potentially related work creation: [ 54.449382] kasan_save_stack+0x22/0x50 [ 54.449920] __kasan_record_aux_stack+0x8e/0xa0 [ 54.450536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.451227] remove_vma+0x139/0x170 [ 54.451717] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.452319] do_vmi_munmap+0x1f1/0x2b0 [ 54.452839] __vm_munmap+0x138/0x3a0 [ 54.453336] __x64_sys_munmap+0x59/0x80 [ 54.453867] do_syscall_64+0x3f/0x90 [ 54.454374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.455064] [ 54.455298] Second to last potentially related work creation: [ 54.456045] kasan_save_stack+0x22/0x50 [ 54.456577] __kasan_record_aux_stack+0x8e/0xa0 [ 54.457202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.457886] remove_vma+0x139/0x170 [ 54.458371] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.458964] do_vmi_munmap+0x1f1/0x2b0 [ 54.459484] mmap_region+0x1f9/0x2660 [ 54.460007] do_mmap+0x854/0xf00 [ 54.460469] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.460994] ksys_mmap_pgoff+0x3af/0x500 [ 54.461536] do_syscall_64+0x3f/0x90 [ 54.462035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.462716] [ 54.462942] The buggy address belongs to the object at ffff88800e94b000 [ 54.462942] which belongs to the cache vm_area_struct of size 168 [ 54.464530] The buggy address is located 88 bytes inside of [ 54.464530] freed 168-byte region [ffff88800e94b000, ffff88800e94b0a8) [ 54.466029] [ 54.466259] The buggy address belongs to the physical page: [ 54.466964] page:00000000349e1a5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe94b [ 54.468132] memcg:ffff88800d9d0701 [ 54.468590] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.469281] page_type: 0xffffffff() [ 54.469766] raw: 0100000000000200 ffff88800879fc80 ffffea000038f680 dead000000000006 [ 54.470748] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9d0701 [ 54.471732] page dumped because: kasan: bad access detected [ 54.472439] [ 54.472669] Memory state around the buggy address: [ 54.473295] ffff88800e94af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.474208] ffff88800e94af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.475123] >ffff88800e94b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.476034] ^ [ 54.476829] ffff88800e94b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 54.477748] ffff88800e94b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.478661] ================================================================== [ 54.480085] Disabling lock debugging due to kernel taint [ 56.434017] BUG: Bad rss-counter state mm:000000009addbb52 type:MM_FILEPAGES val:33 [ 56.435263] BUG: Bad rss-counter state mm:000000009addbb52 type:MM_ANONPAGES val:22 [ 56.818168] BUG: Bad rss-counter state mm:000000008b1b88ed type:MM_FILEPAGES val:33 [ 56.819328] BUG: Bad rss-counter state mm:000000008b1b88ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38931' (ECDSA) to the list of known hosts. 2023/06/20 01:56:35 fuzzer started 2023/06/20 01:56:36 dialing manager at localhost:44161 2023/06/20 01:56:36 checking machine... 2023/06/20 01:56:36 checking revisions... [ 57.570393] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:56:36 testing simple program... [ 57.629474] cgroup: Unknown subsys name 'net' [ 57.686149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:12 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=0000000000000015 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000015 RDI=ffff8880147472e0 RBP=dffffc0000000000 RSP=ffff8880147471b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000015 R13=0000000000000000 R14=ffff888014747238 R15=0000000080110009 RIP=ffffffff813ad613 RFL=00000292 [--S-A--] 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 00007faa47399900 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=00007faa4681f9d0 CR3=000000000d4aa000 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=c572572addc1a1e600000000000ae988 XMM05=5faf08cb1d5f41b40000000000136488 XMM06=806171799158d9670000000000135278 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000255 RCX=0000000080000000 RDX=ffff88800dba8000 RSI=ffffffff8113b9e8 RDI=0000000000000005 RBP=ffff88800f3a7f58 RSP=ffff88800f3a7ed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007fd391e5650c R14=0000000000000000 R15=ffff88801681b780 RIP=ffffffff814c07f1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd391d99900 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=00007fd391e5650c CR3=000000001bd9e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000