syzkaller login: [ 31.202509] BUG: Bad rss-counter state mm:00000000dcf297bf type:MM_FILEPAGES val:33 [ 31.203885] BUG: Bad rss-counter state mm:00000000dcf297bf type:MM_ANONPAGES val:22 [ 31.364327] ================================================================== [ 31.365277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.366377] Read of size 8 at addr ffff88800eb8f228 by task sshd/219 [ 31.367173] [ 31.367396] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.368259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.369280] Call Trace: [ 31.369609] [ 31.369912] dump_stack_lvl+0x91/0xf0 [ 31.370417] print_report+0xcc/0x620 [ 31.370903] ? __virt_addr_valid+0x102/0x340 [ 31.371458] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372697] kasan_report+0xbe/0xf0 [ 31.373171] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.373808] vma_interval_tree_remove+0xc75/0xec0 [ 31.374429] vma_prepare+0xc54/0x11a0 [ 31.374908] __split_vma+0x5af/0x950 [ 31.375377] ? __pfx___split_vma+0x10/0x10 [ 31.375923] ? find_held_lock+0x2c/0x110 [ 31.376442] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.377014] ? lock_is_held_type+0x9f/0x120 [ 31.377591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.378198] ? mtree_range_walk+0x632/0x900 [ 31.378749] ? mas_walk+0x5c7/0x7c0 [ 31.379223] do_vmi_munmap+0x1f1/0x2b0 [ 31.379717] mmap_region+0x1f9/0x2660 [ 31.380196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.380709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.381439] ? __pfx_lock_acquire+0x10/0x10 [ 31.381969] ? __pfx_mmap_region+0x10/0x10 [ 31.382499] ? security_mmap_addr+0x7d/0xa0 [ 31.383036] ? get_unmapped_area+0x1f5/0x3f0 [ 31.383591] do_mmap+0x854/0xf00 [ 31.384025] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.384518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.385085] ksys_mmap_pgoff+0x3af/0x500 [ 31.385602] do_syscall_64+0x3f/0x90 [ 31.386077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386716] RIP: 0033:0x7f774d42ad82 [ 31.387169] 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 [ 31.389323] RSP: 002b:00007fffdf1e73b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.390240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f774d42ad82 [ 31.391090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f774c864000 [ 31.391934] RBP: 00007f774c864000 R08: 0000000000000009 R09: 0000000000001000 [ 31.392769] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a4ee5eec0 [ 31.393635] R13: 00007fffdf1e73d0 R14: 00007fffdf1e7400 R15: 00007fffdf1e7760 [ 31.394483] [ 31.394773] [ 31.394987] Allocated by task 212: [ 31.395411] kasan_save_stack+0x22/0x50 [ 31.395917] kasan_set_track+0x25/0x30 [ 31.396412] __kasan_slab_alloc+0x59/0x70 [ 31.396939] kmem_cache_alloc+0x16b/0x370 [ 31.397466] vm_area_dup+0x20/0x160 [ 31.397917] __split_vma+0x170/0x950 [ 31.398380] split_vma+0xc6/0x110 [ 31.398822] mprotect_fixup+0x8d2/0xb30 [ 31.399321] do_mprotect_pkey+0x87e/0xd40 [ 31.399839] __x64_sys_mprotect+0x78/0xc0 [ 31.400359] do_syscall_64+0x3f/0x90 [ 31.400834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401494] [ 31.401707] Freed by task 212: [ 31.402107] kasan_save_stack+0x22/0x50 [ 31.402606] kasan_set_track+0x25/0x30 [ 31.403110] kasan_save_free_info+0x2b/0x50 [ 31.403644] __kasan_slab_free+0x10a/0x190 [ 31.404177] kmem_cache_free+0x10d/0x4d0 [ 31.404696] rcu_core+0x8c8/0x2860 [ 31.405145] __do_softirq+0x1b7/0x7d4 [ 31.405641] [ 31.405854] Last potentially related work creation: [ 31.406440] kasan_save_stack+0x22/0x50 [ 31.406941] __kasan_record_aux_stack+0x8e/0xa0 [ 31.407517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.408168] remove_vma+0x139/0x170 [ 31.408627] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.409187] do_vmi_munmap+0x1f1/0x2b0 [ 31.409690] __vm_munmap+0x138/0x3a0 [ 31.410158] __x64_sys_munmap+0x59/0x80 [ 31.410660] do_syscall_64+0x3f/0x90 [ 31.411145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411793] [ 31.412004] The buggy address belongs to the object at ffff88800eb8f1d0 [ 31.412004] which belongs to the cache vm_area_struct of size 168 [ 31.413508] The buggy address is located 88 bytes inside of [ 31.413508] freed 168-byte region [ffff88800eb8f1d0, ffff88800eb8f278) [ 31.414940] [ 31.415155] The buggy address belongs to the physical page: [ 31.415826] page:00000000257d54ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb8f [ 31.416983] memcg:ffff88800f810d01 [ 31.417449] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.418133] page_type: 0xffffffff() [ 31.418606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.419583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f810d01 [ 31.420548] page dumped because: kasan: bad access detected [ 31.421266] [ 31.421496] Memory state around the buggy address: [ 31.422117] ffff88800eb8f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.423026] ffff88800eb8f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.423936] >ffff88800eb8f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.424852] ^ [ 31.425454] ffff88800eb8f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.426365] ffff88800eb8f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.427267] ================================================================== [ 31.428478] Disabling lock debugging due to kernel taint [ 34.090002] BUG: Bad rss-counter state mm:0000000009715b65 type:MM_FILEPAGES val:33 [ 34.091039] BUG: Bad rss-counter state mm:0000000009715b65 type:MM_ANONPAGES val:22 [ 34.563428] BUG: Bad rss-counter state mm:00000000c6c5e641 type:MM_FILEPAGES val:33 [ 34.565109] BUG: Bad rss-counter state mm:00000000c6c5e641 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2617' (ECDSA) to the list of known hosts. 2023/06/21 05:30:49 fuzzer started 2023/06/21 05:30:49 dialing manager at localhost:36067 2023/06/21 05:30:49 checking machine... 2023/06/21 05:30:49 checking revisions... [ 35.310020] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:30:49 testing simple program... [ 35.353631] cgroup: Unknown subsys name 'net' [ 35.406018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=ffff8880146cd1c0 RSI=ffffffff8196d4ef RDI=ffffea00006369c0 RBP=ffffea00006369c0 RSP=ffff888015887a90 R8 =0000000000000001 R9 =fffff940000c6d38 R10=ffffea00006369c7 R11=00000000000b6d53 R12=0000000000000000 R13=ffffffff81b28f30 R14=0000000000800000 R15=0000000000029000 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcaf3966900 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=00007fcaf2d79f00 CR3=000000000cb62000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bbaba26258cd7e2600000000000ae988 XMM05=288af4bef64512f50000000000132af0 XMM06=dfcdbad4f1609c370000000000131c38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003952f10 RSI=ffffffff846000aa RDI=ffff88801ca97880 RBP=ffff88801ca97918 RSP=ffff88801ca97858 R8 =0000000000000001 R9 =ffff88801ca978c0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801ca97948 R13=0000000000000000 R14=ffff8880181b9b40 R15=ffff88801ca97880 RIP=ffffffff811305f0 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 00007f15caf99900 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=00007f15cb54e650 CR3=000000001a2ee000 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