syzkaller login: [ 32.115022] BUG: Bad rss-counter state mm:00000000a866d20f type:MM_FILEPAGES val:33 [ 32.116697] BUG: Bad rss-counter state mm:00000000a866d20f type:MM_ANONPAGES val:22 [ 32.273202] ================================================================== [ 32.274134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.275072] Read of size 8 at addr ffff888017a74310 by task sshd/221 [ 32.275841] [ 32.276176] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.277036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.278016] Call Trace: [ 32.278477] [ 32.278820] dump_stack_lvl+0x91/0xf0 [ 32.279429] print_report+0xcc/0x620 [ 32.280029] ? __virt_addr_valid+0x102/0x340 [ 32.280720] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.281486] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.282226] kasan_report+0xbe/0xf0 [ 32.282805] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.283561] vma_interval_tree_remove+0xc75/0xec0 [ 32.284328] vma_prepare+0xc54/0x11a0 [ 32.284910] __split_vma+0x5af/0x950 [ 32.285492] ? __pfx___split_vma+0x10/0x10 [ 32.286123] ? find_held_lock+0x2c/0x110 [ 32.286764] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.287453] ? lock_is_held_type+0x9f/0x120 [ 32.288133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.288852] ? mtree_range_walk+0x632/0x900 [ 32.289430] ? mas_walk+0x5c7/0x7c0 [ 32.289918] do_vmi_munmap+0x1f1/0x2b0 [ 32.290438] mmap_region+0x1f9/0x2660 [ 32.290929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.291456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.292202] ? __pfx_lock_acquire+0x10/0x10 [ 32.292778] ? __pfx_mmap_region+0x10/0x10 [ 32.293333] ? security_mmap_addr+0x7d/0xa0 [ 32.293876] ? get_unmapped_area+0x1f5/0x3f0 [ 32.294455] do_mmap+0x854/0xf00 [ 32.294903] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.295421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.296008] ksys_mmap_pgoff+0x3af/0x500 [ 32.296551] do_syscall_64+0x3f/0x90 [ 32.297044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.297717] RIP: 0033:0x7f2f7fa61d82 [ 32.298185] 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 [ 32.300417] RSP: 002b:00007ffc6d1fb038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.301350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f7fa61d82 [ 32.302222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f7ee9b000 [ 32.303098] RBP: 00007f2f7ee9b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.303973] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579084cff70 [ 32.304852] R13: 00007ffc6d1fb050 R14: 00007ffc6d1fb080 R15: 00007ffc6d1fb3e0 [ 32.305738] [ 32.306034] [ 32.306270] Allocated by task 214: [ 32.306714] kasan_save_stack+0x22/0x50 [ 32.307240] kasan_set_track+0x25/0x30 [ 32.307755] __kasan_slab_alloc+0x59/0x70 [ 32.308328] kmem_cache_alloc+0x16b/0x370 [ 32.308849] vm_area_dup+0x20/0x160 [ 32.309325] __split_vma+0x170/0x950 [ 32.309794] split_vma+0xc6/0x110 [ 32.310246] mprotect_fixup+0x8d2/0xb30 [ 32.310761] do_mprotect_pkey+0x87e/0xd40 [ 32.311298] __x64_sys_mprotect+0x78/0xc0 [ 32.311822] do_syscall_64+0x3f/0x90 [ 32.312342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.312991] [ 32.313214] Freed by task 214: [ 32.313618] kasan_save_stack+0x22/0x50 [ 32.314123] kasan_set_track+0x25/0x30 [ 32.314638] kasan_save_free_info+0x2b/0x50 [ 32.315171] __kasan_slab_free+0x10a/0x190 [ 32.315718] kmem_cache_free+0x10d/0x4d0 [ 32.316256] rcu_core+0x8c8/0x2860 [ 32.316723] __do_softirq+0x1b7/0x7d4 [ 32.317203] [ 32.317427] Last potentially related work creation: [ 32.318015] kasan_save_stack+0x22/0x50 [ 32.318530] __kasan_record_aux_stack+0x8e/0xa0 [ 32.319109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.319761] remove_vma+0x139/0x170 [ 32.320259] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.320842] do_vmi_munmap+0x1f1/0x2b0 [ 32.321340] __vm_munmap+0x138/0x3a0 [ 32.321812] __x64_sys_munmap+0x59/0x80 [ 32.322336] do_syscall_64+0x3f/0x90 [ 32.322807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.323458] [ 32.323678] The buggy address belongs to the object at ffff888017a742b8 [ 32.323678] which belongs to the cache vm_area_struct of size 168 [ 32.325177] The buggy address is located 88 bytes inside of [ 32.325177] freed 168-byte region [ffff888017a742b8, ffff888017a74360) [ 32.326620] [ 32.326840] The buggy address belongs to the physical page: [ 32.327526] page:0000000000f38d15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a74 [ 32.328668] memcg:ffff88800f1f1d01 [ 32.329102] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.329765] page_type: 0xffffffff() [ 32.330231] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.331172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1f1d01 [ 32.332104] page dumped because: kasan: bad access detected [ 32.332805] [ 32.333023] Memory state around the buggy address: [ 32.333621] ffff888017a74200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.334499] ffff888017a74280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.335369] >ffff888017a74300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.336258] ^ [ 32.336747] ffff888017a74380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.337618] ffff888017a74400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.338489] ================================================================== [ 32.339677] Disabling lock debugging due to kernel taint [ 34.257920] BUG: Bad rss-counter state mm:00000000ccd0d977 type:MM_FILEPAGES val:33 [ 34.258796] BUG: Bad rss-counter state mm:00000000ccd0d977 type:MM_ANONPAGES val:22 [ 34.804964] BUG: Bad rss-counter state mm:000000000748e80c type:MM_FILEPAGES val:33 [ 34.806130] BUG: Bad rss-counter state mm:000000000748e80c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19845' (ECDSA) to the list of known hosts. 2023/06/20 04:12:33 fuzzer started 2023/06/20 04:12:33 dialing manager at localhost:44161 2023/06/20 04:12:33 checking machine... 2023/06/20 04:12:33 checking revisions... [ 35.442665] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:12:33 testing simple program... [ 35.490601] cgroup: Unknown subsys name 'net' [ 35.531445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9c482754a0 CR3=000000000e9c6000 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=2033333a32313a3430203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a383038303520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a32313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880161f0000 RCX=0000000000000000 RDX=1ffff11002d78504 RSI=0000000000000008 RDI=ffff888016bc2820 RBP=ffff888016bc2800 RSP=ffff8880159ffc90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800dba1f00 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff8182481d 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 00007f2a7d332900 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=00007f2a7d8e7650 CR3=000000000d5e4000 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