syzkaller login: [ 31.634481] BUG: Bad rss-counter state mm:0000000012e1de98 type:MM_FILEPAGES val:33 [ 31.635558] BUG: Bad rss-counter state mm:0000000012e1de98 type:MM_ANONPAGES val:22 [ 31.806575] ================================================================== [ 31.807669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.808781] Read of size 8 at addr ffff88800c7514e0 by task sshd/219 [ 31.809860] [ 31.810121] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.811141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.812413] Call Trace: [ 31.812797] [ 31.813134] dump_stack_lvl+0x91/0xf0 [ 31.813761] print_report+0xcc/0x620 [ 31.814337] ? __virt_addr_valid+0x102/0x340 [ 31.815000] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.815747] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.816521] kasan_report+0xbe/0xf0 [ 31.817112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.817897] vma_interval_tree_remove+0xc75/0xec0 [ 31.818656] vma_prepare+0xc54/0x11a0 [ 31.819256] __split_vma+0x5af/0x950 [ 31.819848] ? __pfx___split_vma+0x10/0x10 [ 31.820520] ? find_held_lock+0x2c/0x110 [ 31.821197] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.821929] ? lock_is_held_type+0x9f/0x120 [ 31.822602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.823266] ? mtree_range_walk+0x632/0x900 [ 31.823872] ? mas_walk+0x5c7/0x7c0 [ 31.824391] do_vmi_munmap+0x1f1/0x2b0 [ 31.824935] mmap_region+0x1f9/0x2660 [ 31.825480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.826049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.826835] ? __pfx_lock_acquire+0x10/0x10 [ 31.827417] ? __pfx_mmap_region+0x10/0x10 [ 31.827994] ? security_mmap_addr+0x7d/0xa0 [ 31.828575] ? get_unmapped_area+0x1f5/0x3f0 [ 31.829200] do_mmap+0x854/0xf00 [ 31.829697] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.830255] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.830877] ksys_mmap_pgoff+0x3af/0x500 [ 31.831436] do_syscall_64+0x3f/0x90 [ 31.831968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.832678] RIP: 0033:0x7f176a886d82 [ 31.833187] 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 [ 31.835551] RSP: 002b:00007ffd6b3348e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.836573] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f176a886d82 [ 31.837524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1769cc0000 [ 31.838451] RBP: 00007f1769cc0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.839385] R10: 0000000000000812 R11: 0000000000000206 R12: 000056359abd4ec0 [ 31.840330] R13: 00007ffd6b334900 R14: 00007ffd6b334930 R15: 00007ffd6b334c90 [ 31.841277] [ 31.841629] [ 31.841866] Allocated by task 212: [ 31.842351] kasan_save_stack+0x22/0x50 [ 31.842914] kasan_set_track+0x25/0x30 [ 31.843469] __kasan_slab_alloc+0x59/0x70 [ 31.844036] kmem_cache_alloc+0x16b/0x370 [ 31.844594] vm_area_dup+0x20/0x160 [ 31.845079] __split_vma+0x170/0x950 [ 31.845600] split_vma+0xc6/0x110 [ 31.846072] mprotect_fixup+0x8d2/0xb30 [ 31.846608] do_mprotect_pkey+0x87e/0xd40 [ 31.847169] __x64_sys_mprotect+0x78/0xc0 [ 31.847727] do_syscall_64+0x3f/0x90 [ 31.848245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.848928] [ 31.849162] Freed by task 212: [ 31.849598] kasan_save_stack+0x22/0x50 [ 31.850226] kasan_set_track+0x25/0x30 [ 31.850749] kasan_save_free_info+0x2b/0x50 [ 31.851314] __kasan_slab_free+0x10a/0x190 [ 31.851897] kmem_cache_free+0x10d/0x4d0 [ 31.852441] rcu_core+0x8c8/0x2860 [ 31.852916] __do_softirq+0x1b7/0x7d4 [ 31.853455] [ 31.853689] Last potentially related work creation: [ 31.854312] kasan_save_stack+0x22/0x50 [ 31.854880] __kasan_record_aux_stack+0x8e/0xa0 [ 31.855498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.856191] remove_vma+0x139/0x170 [ 31.856687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.857287] do_vmi_munmap+0x1f1/0x2b0 [ 31.857809] __vm_munmap+0x138/0x3a0 [ 31.858312] __x64_sys_munmap+0x59/0x80 [ 31.858849] do_syscall_64+0x3f/0x90 [ 31.859356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.860036] [ 31.860266] Second to last potentially related work creation: [ 31.861024] kasan_save_stack+0x22/0x50 [ 31.861576] __kasan_record_aux_stack+0x8e/0xa0 [ 31.862196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.862908] remove_vma+0x139/0x170 [ 31.863390] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.863986] do_vmi_munmap+0x1f1/0x2b0 [ 31.864504] mmap_region+0x1f9/0x2660 [ 31.865022] do_mmap+0x854/0xf00 [ 31.865500] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.866022] ksys_mmap_pgoff+0x3af/0x500 [ 31.866561] do_syscall_64+0x3f/0x90 [ 31.867074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.867757] [ 31.867986] The buggy address belongs to the object at ffff88800c751488 [ 31.867986] which belongs to the cache vm_area_struct of size 168 [ 31.869575] The buggy address is located 88 bytes inside of [ 31.869575] freed 168-byte region [ffff88800c751488, ffff88800c751530) [ 31.871081] [ 31.871314] The buggy address belongs to the physical page: [ 31.872014] page:00000000447a1334 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc751 [ 31.873177] memcg:ffff88800c77fd01 [ 31.873675] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.874399] page_type: 0xffffffff() [ 31.874887] raw: 0100000000000200 ffff88800879fc80 ffffea0000254f80 dead000000000008 [ 31.875874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c77fd01 [ 31.876847] page dumped because: kasan: bad access detected [ 31.877561] [ 31.877791] Memory state around the buggy address: [ 31.878409] ffff88800c751380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.879365] ffff88800c751400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.880289] >ffff88800c751480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.881217] ^ [ 31.882034] ffff88800c751500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.882958] ffff88800c751580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.883882] ================================================================== [ 31.885064] Disabling lock debugging due to kernel taint [ 34.602086] BUG: Bad rss-counter state mm:00000000e155c286 type:MM_FILEPAGES val:33 [ 34.603274] BUG: Bad rss-counter state mm:00000000e155c286 type:MM_ANONPAGES val:22 [ 35.023499] BUG: Bad rss-counter state mm:00000000c113a8da type:MM_FILEPAGES val:33 [ 35.024920] BUG: Bad rss-counter state mm:00000000c113a8da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50388' (ECDSA) to the list of known hosts. 2023/06/19 16:46:14 fuzzer started 2023/06/19 16:46:15 dialing manager at localhost:44161 2023/06/19 16:46:15 checking machine... 2023/06/19 16:46:15 checking revisions... [ 35.745738] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:46:15 testing simple program... [ 35.794679] cgroup: Unknown subsys name 'net' [ 35.844594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fe8b680 RSI=ffffffff8366dfd0 RDI=0000000000000001 RBP=ffff88800ff323c0 RSP=ffff888019c5f978 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8386a1fd R13=ffff888019b87300 R14=ffff888019c5fa88 R15=0000000000000014 RIP=ffffffff814c081b 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 00007f9bf31bb900 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=00007f9bf3772618 CR3=000000001697e000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fd76e62f440 CR3=000000000c77c000 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=1d136aa0477a81a11047578c062580ad XMM02=000000000011da00ec2efd57dc4c00df XMM03=00000000001247e0b75cdd0947f557dd XMM04=bbf6a4de71e576b300000000000ae988 XMM05=dfcdbad4f1609c3700000000001356d0 XMM06=1b1dce87024b1a4d0000000000134538 XMM07=e042d86d42eb936e0000000000124a60 XMM08=b75cdd0947f557dd000000000011da60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000