syzkaller login: [ 32.497444] BUG: Bad rss-counter state mm:00000000c7e6b5fd type:MM_FILEPAGES val:33 [ 32.498378] BUG: Bad rss-counter state mm:00000000c7e6b5fd type:MM_ANONPAGES val:22 [ 32.619405] ================================================================== [ 32.620163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.620896] Read of size 8 at addr ffff88800e3884e0 by task sshd/219 [ 32.621470] [ 32.621638] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.622283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.623017] Call Trace: [ 32.623353] [ 32.623815] dump_stack_lvl+0x91/0xf0 [ 32.624170] print_report+0xcc/0x620 [ 32.624526] ? __virt_addr_valid+0x102/0x340 [ 32.624944] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.625395] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.625875] kasan_report+0xbe/0xf0 [ 32.626223] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.626679] vma_interval_tree_remove+0xc75/0xec0 [ 32.627131] vma_prepare+0xc54/0x11a0 [ 32.627490] __split_vma+0x5af/0x950 [ 32.627895] ? __pfx___split_vma+0x10/0x10 [ 32.628294] ? find_held_lock+0x2c/0x110 [ 32.628680] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.629097] ? lock_is_held_type+0x9f/0x120 [ 32.629495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.629953] ? mtree_range_walk+0x632/0x900 [ 32.630365] ? mas_walk+0x5c7/0x7c0 [ 32.630749] do_vmi_munmap+0x1f1/0x2b0 [ 32.631122] mmap_region+0x1f9/0x2660 [ 32.631499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.631916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.632451] ? __pfx_lock_acquire+0x10/0x10 [ 32.632858] ? __pfx_mmap_region+0x10/0x10 [ 32.633256] ? security_mmap_addr+0x7d/0xa0 [ 32.633651] ? get_unmapped_area+0x1f5/0x3f0 [ 32.634059] do_mmap+0x854/0xf00 [ 32.634394] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.634773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.635193] ksys_mmap_pgoff+0x3af/0x500 [ 32.635575] do_syscall_64+0x3f/0x90 [ 32.635965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.636447] RIP: 0033:0x7f642bc02d82 [ 32.636790] 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 [ 32.638487] RSP: 002b:00007ffd632cb118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.639166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f642bc02d82 [ 32.639837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f642b03c000 [ 32.640484] RBP: 00007f642b03c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.641123] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad4f00dec0 [ 32.641737] R13: 00007ffd632cb130 R14: 00007ffd632cb160 R15: 00007ffd632cb4c0 [ 32.642374] [ 32.642601] [ 32.642766] Allocated by task 212: [ 32.643085] kasan_save_stack+0x22/0x50 [ 32.643463] kasan_set_track+0x25/0x30 [ 32.643869] __kasan_slab_alloc+0x59/0x70 [ 32.644258] kmem_cache_alloc+0x16b/0x370 [ 32.644648] vm_area_dup+0x20/0x160 [ 32.644985] __split_vma+0x170/0x950 [ 32.645342] split_vma+0xc6/0x110 [ 32.645663] mprotect_fixup+0x8d2/0xb30 [ 32.646024] do_mprotect_pkey+0x87e/0xd40 [ 32.646430] __x64_sys_mprotect+0x78/0xc0 [ 32.646825] do_syscall_64+0x3f/0x90 [ 32.647172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.647649] [ 32.647837] Freed by task 212: [ 32.648126] kasan_save_stack+0x22/0x50 [ 32.648512] kasan_set_track+0x25/0x30 [ 32.648885] kasan_save_free_info+0x2b/0x50 [ 32.649277] __kasan_slab_free+0x10a/0x190 [ 32.649661] kmem_cache_free+0x10d/0x4d0 [ 32.650046] rcu_core+0x8c8/0x2860 [ 32.650386] __do_softirq+0x1b7/0x7d4 [ 32.650733] [ 32.650897] Last potentially related work creation: [ 32.651327] kasan_save_stack+0x22/0x50 [ 32.651716] __kasan_record_aux_stack+0x8e/0xa0 [ 32.652137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.652620] remove_vma+0x139/0x170 [ 32.652956] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.653378] do_vmi_munmap+0x1f1/0x2b0 [ 32.653733] __vm_munmap+0x138/0x3a0 [ 32.654076] __x64_sys_munmap+0x59/0x80 [ 32.654437] do_syscall_64+0x3f/0x90 [ 32.654783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.655279] [ 32.655445] The buggy address belongs to the object at ffff88800e388488 [ 32.655445] which belongs to the cache vm_area_struct of size 168 [ 32.656559] The buggy address is located 88 bytes inside of [ 32.656559] freed 168-byte region [ffff88800e388488, ffff88800e388530) [ 32.657614] [ 32.657779] The buggy address belongs to the physical page: [ 32.658264] page:00000000ef322ca8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe388 [ 32.659070] memcg:ffff888013b62101 [ 32.659399] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.659949] page_type: 0xffffffff() [ 32.660276] raw: 0100000000000200 ffff88800879fc80 ffffea000067f580 dead000000000007 [ 32.660972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b62101 [ 32.661645] page dumped because: kasan: bad access detected [ 32.662134] [ 32.662288] Memory state around the buggy address: [ 32.662730] ffff88800e388380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.663380] ffff88800e388400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.664036] >ffff88800e388480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.664663] ^ [ 32.665357] ffff88800e388500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 32.665984] ffff88800e388580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.666621] ================================================================== [ 32.667375] Disabling lock debugging due to kernel taint [ 34.292176] BUG: Bad rss-counter state mm:00000000f5139cfd type:MM_FILEPAGES val:33 [ 34.292951] BUG: Bad rss-counter state mm:00000000f5139cfd type:MM_ANONPAGES val:22 [ 34.671977] BUG: Bad rss-counter state mm:0000000075acb2ac type:MM_FILEPAGES val:33 [ 34.672756] BUG: Bad rss-counter state mm:0000000075acb2ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31626' (ECDSA) to the list of known hosts. 2023/06/20 09:08:51 fuzzer started 2023/06/20 09:08:52 dialing manager at localhost:44161 2023/06/20 09:08:52 checking machine... 2023/06/20 09:08:52 checking revisions... [ 35.200513] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:08:52 testing simple program... [ 35.236235] cgroup: Unknown subsys name 'net' [ 35.271976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:51 Registers: info registers vcpu 0 RAX=1ffff1100227f5db RBX=ffff8880113faea8 RCX=ffffffff812e00e5 RDX=dffffc0000000000 RSI=ffff888015dc27c0 RDI=ffff8880113faed8 RBP=0000000000000540 RSP=ffff88800e8cfcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888015dc2280 R13=0000000000000000 R14=ffff88801c9e5508 R15=ffff88801c9e54c0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f05203a2900 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=00007f0520959618 CR3=000000000f534000 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=00000000000000000000000000000000 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=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff864bb001 RDX=1ffff1100d9e136d RSI=ffffffff8450d49f RDI=ffff88806cf09b68 RBP=000000000000000a RSP=ffff88806cf09a78 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800de00000 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 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=00007f54b738b980 CR3=000000000cb18000 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=70dc06871685f295474a6050e4a55379 XMM02=000000000011cfc8eff9b2d0a8fce9cb XMM03=000000000011d0982c67c8bc2e329bc3 XMM04=ded1e16c3c1bcb9c00000000000ae988 XMM05=dfcdbad4f1609c370000000000134080 XMM06=1f5f24ae0fa9aa520000000000132ee8 XMM07=e042d86d42eb936e00000000001247f8 XMM08=3856a20f98fe59da000000000011d098 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000