syzkaller login: [ 61.403777] BUG: Bad rss-counter state mm:000000009db3d124 type:MM_FILEPAGES val:33 [ 61.405198] BUG: Bad rss-counter state mm:000000009db3d124 type:MM_ANONPAGES val:22 [ 61.444457] ================================================================== [ 61.445691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.446968] Read of size 8 at addr ffff88800fb44310 by task sshd/221 [ 61.447995] [ 61.448267] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.449360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.450651] Call Trace: [ 61.451028] [ 61.451384] dump_stack_lvl+0x91/0xf0 [ 61.451951] print_report+0xcc/0x620 [ 61.452678] ? __virt_addr_valid+0x102/0x340 [ 61.453313] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.454057] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.454780] kasan_report+0xbe/0xf0 [ 61.455339] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.456072] vma_interval_tree_remove+0xc75/0xec0 [ 61.456797] vma_prepare+0xc54/0x11a0 [ 61.457362] __split_vma+0x5af/0x950 [ 61.457920] ? __pfx___split_vma+0x10/0x10 [ 61.458544] ? find_held_lock+0x2c/0x110 [ 61.459157] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.459826] ? lock_is_held_type+0x9f/0x120 [ 61.460459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.461171] ? mtree_range_walk+0x632/0x900 [ 61.461834] ? mas_walk+0x5c7/0x7c0 [ 61.462389] do_vmi_munmap+0x1f1/0x2b0 [ 61.462967] mmap_region+0x1f9/0x2660 [ 61.463548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.464151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.464984] ? __pfx_lock_acquire+0x10/0x10 [ 61.465618] ? __pfx_mmap_region+0x10/0x10 [ 61.466271] ? security_mmap_addr+0x7d/0xa0 [ 61.466897] ? get_unmapped_area+0x1f5/0x3f0 [ 61.467539] do_mmap+0x854/0xf00 [ 61.468056] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.468637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.469287] ksys_mmap_pgoff+0x3af/0x500 [ 61.469891] do_syscall_64+0x3f/0x90 [ 61.470462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.471230] RIP: 0033:0x7fdf478fed82 [ 61.471760] 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 [ 61.474265] RSP: 002b:00007ffc67f090d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.475326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf478fed82 [ 61.476317] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf46d38000 [ 61.477322] RBP: 00007fdf46d38000 R08: 0000000000000009 R09: 0000000000001000 [ 61.478322] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ff76f7ec0 [ 61.479304] R13: 00007ffc67f090f0 R14: 00007ffc67f09120 R15: 00007ffc67f09480 [ 61.480411] [ 61.480749] [ 61.480994] Allocated by task 214: [ 61.481494] kasan_save_stack+0x22/0x50 [ 61.482085] kasan_set_track+0x25/0x30 [ 61.482665] __kasan_slab_alloc+0x59/0x70 [ 61.483268] kmem_cache_alloc+0x16b/0x370 [ 61.483864] vm_area_dup+0x20/0x160 [ 61.484382] __split_vma+0x170/0x950 [ 61.484932] split_vma+0xc6/0x110 [ 61.485438] mprotect_fixup+0x8d2/0xb30 [ 61.486038] do_mprotect_pkey+0x87e/0xd40 [ 61.486639] __x64_sys_mprotect+0x78/0xc0 [ 61.487238] do_syscall_64+0x3f/0x90 [ 61.487788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.488537] [ 61.488787] Freed by task 214: [ 61.489247] kasan_save_stack+0x22/0x50 [ 61.489841] kasan_set_track+0x25/0x30 [ 61.490409] kasan_save_free_info+0x2b/0x50 [ 61.491019] __kasan_slab_free+0x10a/0x190 [ 61.491629] kmem_cache_free+0x10d/0x4d0 [ 61.492213] rcu_core+0x8c8/0x2860 [ 61.492724] __do_softirq+0x1b7/0x7d4 [ 61.493275] [ 61.493521] Last potentially related work creation: [ 61.494191] kasan_save_stack+0x22/0x50 [ 61.494764] __kasan_record_aux_stack+0x8e/0xa0 [ 61.495415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.496169] remove_vma+0x139/0x170 [ 61.496691] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.497325] do_vmi_munmap+0x1f1/0x2b0 [ 61.497904] __vm_munmap+0x138/0x3a0 [ 61.498441] __x64_sys_munmap+0x59/0x80 [ 61.499009] do_syscall_64+0x3f/0x90 [ 61.499560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.500294] [ 61.500540] The buggy address belongs to the object at ffff88800fb442b8 [ 61.500540] which belongs to the cache vm_area_struct of size 168 [ 61.502228] The buggy address is located 88 bytes inside of [ 61.502228] freed 168-byte region [ffff88800fb442b8, ffff88800fb44360) [ 61.503831] [ 61.504073] The buggy address belongs to the physical page: [ 61.504816] page:000000006d090bc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb44 [ 61.506318] memcg:ffff88800d2e3601 [ 61.506811] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.507551] page_type: 0xffffffff() [ 61.508059] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.509111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e3601 [ 61.510150] page dumped because: kasan: bad access detected [ 61.510898] [ 61.511141] Memory state around the buggy address: [ 61.511796] ffff88800fb44200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.512772] ffff88800fb44280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.513751] >ffff88800fb44300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.514725] ^ [ 61.515243] ffff88800fb44380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.516194] ffff88800fb44400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.517142] ================================================================== [ 61.518368] Disabling lock debugging due to kernel taint [ 63.294623] BUG: Bad rss-counter state mm:00000000ee93ac30 type:MM_FILEPAGES val:33 [ 63.296053] BUG: Bad rss-counter state mm:00000000ee93ac30 type:MM_ANONPAGES val:22 [ 63.792609] BUG: Bad rss-counter state mm:00000000809cd1aa type:MM_FILEPAGES val:33 [ 63.793846] BUG: Bad rss-counter state mm:00000000809cd1aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62451' (ECDSA) to the list of known hosts. 2023/06/20 12:29:40 fuzzer started 2023/06/20 12:29:41 dialing manager at localhost:36067 2023/06/20 12:29:41 checking machine... 2023/06/20 12:29:41 checking revisions... [ 64.499253] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:29:41 testing simple program... [ 64.549634] cgroup: Unknown subsys name 'net' [ 64.602690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016e8fa20 RCX=ffffffff86138e01 RDX=1ffff11002dd1f45 RSI=ffffffff8180c705 RDI=ffff888016e8fa28 RBP=0000000000000001 RSP=ffff888016e8f938 R8 =ffffffff86138e90 R9 =ffff888016e8f998 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016e8fa20 R13=0000000000000000 R14=ffff8880161851c0 R15=ffff88800ebb0280 RIP=ffffffff813ad4be RFL=00000212 [----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 00007fa585b9a900 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=00007fa586151618 CR3=000000000d6a8000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1e89154cf0 CR3=000000000f25e000 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=f590378b3d814983dc4f019ac085aab8 XMM02=ec2efd57dc4c00df000000000011b7b8 XMM03=fe18ff9a3a95b1e3000000000011b888 XMM04=6cc849d6b5e4379700000000000ae988 XMM05=e4cb8bb95a7664b60000000000132358 XMM06=42ae934d0786e27100000000001311c0 XMM07=e042d86d42eb936e0000000000122778 XMM08=fe18ff9a3a95b1e3000000000011b888 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000