syzkaller login: [ 38.762255] BUG: Bad rss-counter state mm:0000000002fa47dc type:MM_FILEPAGES val:33 [ 38.764272] BUG: Bad rss-counter state mm:0000000002fa47dc type:MM_ANONPAGES val:22 [ 38.943214] ================================================================== [ 38.944131] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.945086] Read of size 8 at addr ffff888009085df0 by task sshd/225 [ 38.945981] [ 38.946209] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.947114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.948143] Call Trace: [ 38.948471] [ 38.948768] dump_stack_lvl+0x91/0xf0 [ 38.949271] print_report+0xcc/0x620 [ 38.949782] ? __virt_addr_valid+0x102/0x340 [ 38.950344] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951010] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951644] kasan_report+0xbe/0xf0 [ 38.952145] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.952844] vma_interval_tree_remove+0xc75/0xec0 [ 38.953497] vma_prepare+0xc54/0x11a0 [ 38.954021] __split_vma+0x5af/0x950 [ 38.954535] ? __pfx___split_vma+0x10/0x10 [ 38.955121] ? find_held_lock+0x2c/0x110 [ 38.955692] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.956308] ? lock_is_held_type+0x9f/0x120 [ 38.956912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.957570] ? mtree_range_walk+0x632/0x900 [ 38.958172] ? mas_walk+0x5c7/0x7c0 [ 38.958713] do_vmi_munmap+0x1f1/0x2b0 [ 38.959245] mmap_region+0x1f9/0x2660 [ 38.959776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.960334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.961129] ? __pfx_lock_acquire+0x10/0x10 [ 38.961718] ? __pfx_mmap_region+0x10/0x10 [ 38.962298] ? security_mmap_addr+0x7d/0xa0 [ 38.962910] ? get_unmapped_area+0x1f5/0x3f0 [ 38.963501] do_mmap+0x854/0xf00 [ 38.963989] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.964520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.965131] ksys_mmap_pgoff+0x3af/0x500 [ 38.965691] do_syscall_64+0x3f/0x90 [ 38.966224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966948] RIP: 0033:0x7f12a9c7bd82 [ 38.967435] 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 [ 38.969756] RSP: 002b:00007ffc2928f8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.970779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12a9c7bd82 [ 38.971709] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12a90b5000 [ 38.972619] RBP: 00007f12a90b5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.973547] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560bdbefb20 [ 38.974473] R13: 00007ffc2928f910 R14: 00007ffc2928f940 R15: 00007ffc2928fca0 [ 38.975433] [ 38.975777] [ 38.976012] Allocated by task 218: [ 38.976470] kasan_save_stack+0x22/0x50 [ 38.977029] kasan_set_track+0x25/0x30 [ 38.977555] __kasan_slab_alloc+0x59/0x70 [ 38.978127] kmem_cache_alloc+0x16b/0x370 [ 38.978709] vm_area_dup+0x20/0x160 [ 38.979201] __split_vma+0x170/0x950 [ 38.979710] split_vma+0xc6/0x110 [ 38.980174] mprotect_fixup+0x8d2/0xb30 [ 38.980727] do_mprotect_pkey+0x87e/0xd40 [ 38.981292] __x64_sys_mprotect+0x78/0xc0 [ 38.981869] do_syscall_64+0x3f/0x90 [ 38.982374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.983125] [ 38.983360] Freed by task 218: [ 38.983798] kasan_save_stack+0x22/0x50 [ 38.984340] kasan_set_track+0x25/0x30 [ 38.984899] kasan_save_free_info+0x2b/0x50 [ 38.985484] __kasan_slab_free+0x10a/0x190 [ 38.986064] kmem_cache_free+0x10d/0x4d0 [ 38.986632] rcu_core+0x8c8/0x2860 [ 38.987122] __do_softirq+0x1b7/0x7d4 [ 38.987632] [ 38.987871] Last potentially related work creation: [ 38.988511] kasan_save_stack+0x22/0x50 [ 38.989060] __kasan_record_aux_stack+0x8e/0xa0 [ 38.989682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.990390] remove_vma+0x139/0x170 [ 38.990898] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.991500] do_vmi_munmap+0x1f1/0x2b0 [ 38.992032] __vm_munmap+0x138/0x3a0 [ 38.992535] __x64_sys_munmap+0x59/0x80 [ 38.993088] do_syscall_64+0x3f/0x90 [ 38.993608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994312] [ 38.994552] The buggy address belongs to the object at ffff888009085d98 [ 38.994552] which belongs to the cache vm_area_struct of size 168 [ 38.996164] The buggy address is located 88 bytes inside of [ 38.996164] freed 168-byte region [ffff888009085d98, ffff888009085e40) [ 38.998052] [ 38.998343] The buggy address belongs to the physical page: [ 38.999270] page:00000000dbaf215c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9085 [ 39.000763] memcg:ffff888017f78a01 [ 39.001350] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.002256] page_type: 0xffffffff() [ 39.002900] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.004111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f78a01 [ 39.005140] page dumped because: kasan: bad access detected [ 39.005888] [ 39.006121] Memory state around the buggy address: [ 39.006829] ffff888009085c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.007832] ffff888009085d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.008775] >ffff888009085d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.009730] ^ [ 39.010627] ffff888009085e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.011568] ffff888009085e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.012500] ================================================================== [ 39.013645] Disabling lock debugging due to kernel taint [ 41.576116] BUG: Bad rss-counter state mm:00000000dee57278 type:MM_FILEPAGES val:33 [ 41.577411] BUG: Bad rss-counter state mm:00000000dee57278 type:MM_ANONPAGES val:22 [ 41.581993] sshd (225) used greatest stack depth: 24024 bytes left [ 42.032116] BUG: Bad rss-counter state mm:00000000b9a189f9 type:MM_FILEPAGES val:33 [ 42.033126] BUG: Bad rss-counter state mm:00000000b9a189f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8796' (ECDSA) to the list of known hosts. 2023/06/20 14:44:22 fuzzer started 2023/06/20 14:44:23 dialing manager at localhost:36067 2023/06/20 14:44:23 checking machine... 2023/06/20 14:44:23 checking revisions... [ 42.773549] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:44:23 testing simple program... [ 42.819976] cgroup: Unknown subsys name 'net' [ 42.859708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e296288 RCX=ffff8880087a0c80 RDX=ffffea000038a480 RSI=ffff88800e2961b0 RDI=ffff8880087a0dc0 RBP=0000000000000000 RSP=ffff88801032fc78 R8 =ffff88800e292570 R9 =0000000000000000 R10=ffffea000038a580 R11=0000000000120006 R12=dffffc0000000000 R13=ffff88801032fcb8 R14=ffff8880087a0c80 R15=ffff88800e2961b0 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007ff17bc7c900 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=00007ff17b19a000 CR3=00000000144f8000 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=0e69f7eba4eb5f4900000000000ae988 XMM05=47ea3424fb9eb4c20000000000132e30 XMM06=13e856d8d71426c80000000000131ed0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00000000000002ff RCX=ffffffff83652db5 RDX=ffffed100188834f RSI=0000000000000004 RDI=ffff88800c441a74 RBP=ffff88800c441800 RSP=ffff888017c07878 R8 =0000000000000001 R9 =ffffed100188834e R10=ffff88800c441a77 R11=00000000000b6a61 R12=0000000000000301 R13=ffff88800c441860 R14=0000000000000000 R15=ffff88800c441a74 RIP=ffffffff83652dc4 RFL=00000203 [------C] 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 00007fe001335700 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=00007ffe90914000 CR3=000000000d6c6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3533325b646873732032323a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343738 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000