syzkaller login: [ 30.090216] BUG: Bad rss-counter state mm:0000000096e0303f type:MM_FILEPAGES val:33 [ 30.092083] BUG: Bad rss-counter state mm:0000000096e0303f type:MM_ANONPAGES val:22 [ 30.267437] ================================================================== [ 30.268336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.269272] Read of size 8 at addr ffff888018dc7058 by task sshd/221 [ 30.270032] [ 30.270365] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.271231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.272215] Call Trace: [ 30.272574] [ 30.272874] dump_stack_lvl+0x91/0xf0 [ 30.273371] print_report+0xcc/0x620 [ 30.273851] ? __virt_addr_valid+0x102/0x340 [ 30.274406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275022] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275647] kasan_report+0xbe/0xf0 [ 30.276126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.276756] vma_interval_tree_remove+0xc75/0xec0 [ 30.277370] vma_prepare+0xc54/0x11a0 [ 30.277845] __split_vma+0x5af/0x950 [ 30.278315] ? __pfx___split_vma+0x10/0x10 [ 30.278842] ? find_held_lock+0x2c/0x110 [ 30.279362] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.279920] ? lock_is_held_type+0x9f/0x120 [ 30.280468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.281090] ? mtree_range_walk+0x632/0x900 [ 30.281639] ? mas_walk+0x5c7/0x7c0 [ 30.282115] do_vmi_munmap+0x1f1/0x2b0 [ 30.282604] mmap_region+0x1f9/0x2660 [ 30.283087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.283594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.284311] ? __pfx_lock_acquire+0x10/0x10 [ 30.284851] ? __pfx_mmap_region+0x10/0x10 [ 30.285382] ? security_mmap_addr+0x7d/0xa0 [ 30.285911] ? get_unmapped_area+0x1f5/0x3f0 [ 30.286461] do_mmap+0x854/0xf00 [ 30.286896] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.287390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.287962] ksys_mmap_pgoff+0x3af/0x500 [ 30.288472] do_syscall_64+0x3f/0x90 [ 30.288954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.289599] RIP: 0033:0x7feb38df4d82 [ 30.290053] 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 [ 30.292177] RSP: 002b:00007ffcd5996078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.293095] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb38df4d82 [ 30.293940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb3822e000 [ 30.294783] RBP: 00007feb3822e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.295624] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8b767ed90 [ 30.296468] R13: 00007ffcd5996090 R14: 00007ffcd59960c0 R15: 00007ffcd5996420 [ 30.297336] [ 30.297627] [ 30.297840] Allocated by task 214: [ 30.298271] kasan_save_stack+0x22/0x50 [ 30.298776] kasan_set_track+0x25/0x30 [ 30.299275] __kasan_slab_alloc+0x59/0x70 [ 30.299794] kmem_cache_alloc+0x16b/0x370 [ 30.300311] vm_area_dup+0x20/0x160 [ 30.300762] __split_vma+0x170/0x950 [ 30.301241] split_vma+0xc6/0x110 [ 30.301680] mprotect_fixup+0x8d2/0xb30 [ 30.302177] do_mprotect_pkey+0x87e/0xd40 [ 30.302693] __x64_sys_mprotect+0x78/0xc0 [ 30.303208] do_syscall_64+0x3f/0x90 [ 30.303683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.304323] [ 30.304539] Freed by task 19: [ 30.304930] kasan_save_stack+0x22/0x50 [ 30.305427] kasan_set_track+0x25/0x30 [ 30.305915] kasan_save_free_info+0x2b/0x50 [ 30.306452] __kasan_slab_free+0x10a/0x190 [ 30.306980] kmem_cache_free+0x10d/0x4d0 [ 30.307485] rcu_core+0x8c8/0x2860 [ 30.307940] __do_softirq+0x1b7/0x7d4 [ 30.308416] [ 30.308632] Last potentially related work creation: [ 30.309223] kasan_save_stack+0x22/0x50 [ 30.309726] __kasan_record_aux_stack+0x8e/0xa0 [ 30.310295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.310938] remove_vma+0x139/0x170 [ 30.311392] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.311944] do_vmi_munmap+0x1f1/0x2b0 [ 30.312425] __vm_munmap+0x138/0x3a0 [ 30.312913] __x64_sys_munmap+0x59/0x80 [ 30.313409] do_syscall_64+0x3f/0x90 [ 30.313886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.314524] [ 30.314737] The buggy address belongs to the object at ffff888018dc7000 [ 30.314737] which belongs to the cache vm_area_struct of size 168 [ 30.316207] The buggy address is located 88 bytes inside of [ 30.316207] freed 168-byte region [ffff888018dc7000, ffff888018dc70a8) [ 30.317621] [ 30.317839] The buggy address belongs to the physical page: [ 30.318494] page:000000004cad8caa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dc7 [ 30.319580] memcg:ffff888017c1bc01 [ 30.320003] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.320643] page_type: 0xffffffff() [ 30.321120] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.322030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c1bc01 [ 30.322930] page dumped because: kasan: bad access detected [ 30.323586] [ 30.323799] Memory state around the buggy address: [ 30.324378] ffff888018dc6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.325230] ffff888018dc6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.326085] >ffff888018dc7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.326932] ^ [ 30.327660] ffff888018dc7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.328508] ffff888018dc7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.329373] ================================================================== [ 30.330495] Disabling lock debugging due to kernel taint [ 32.423131] BUG: Bad rss-counter state mm:0000000098ef0fbd type:MM_FILEPAGES val:33 [ 32.424448] BUG: Bad rss-counter state mm:0000000098ef0fbd type:MM_ANONPAGES val:22 [ 33.009513] BUG: Bad rss-counter state mm:00000000b79fd2b5 type:MM_FILEPAGES val:33 [ 33.010659] BUG: Bad rss-counter state mm:00000000b79fd2b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14793' (ECDSA) to the list of known hosts. 2023/06/20 23:31:46 fuzzer started 2023/06/20 23:31:46 dialing manager at localhost:36067 2023/06/20 23:31:46 checking machine... 2023/06/20 23:31:46 checking revisions... [ 33.667847] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:31:46 testing simple program... [ 33.718480] cgroup: Unknown subsys name 'net' [ 33.769602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffc826cc28 CR3=0000000005482000 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=00007f72cee9b51000005570ef3d8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002d5bf45 RSI=ffff888016adff00 RDI=ffff888016adfa28 RBP=ffff888016adff58 RSP=ffff888016adf968 R8 =0000000000000001 R9 =ffff888016adfa18 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888016adfa38 R13=ffff888016adfa20 R14=ffff888016adff00 R15=ffff888016adf9d8 RIP=ffffffff81131266 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3a2b141900 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=00007f3a2a587b00 CR3=0000000009a2a000 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=d59e07bde36eea69000000000011a438 XMM01=b3285ca56c489dff000000000010a368 XMM02=ac585006bc0bee6f00000000000f8408 XMM03=2e86c1e8fc57753200000000000f7f48 XMM04=07e8602e3ad863b900000000000ae988 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=8cdec34d38af4c0a00000000000f7ed0 XMM07=693bd129e125714a00000000000f8210 XMM08=59d5b690e0af863b0000000000131828 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000