syzkaller login: [ 40.708250] BUG: Bad rss-counter state mm:000000002dfe657d type:MM_FILEPAGES val:33 [ 40.709541] BUG: Bad rss-counter state mm:000000002dfe657d type:MM_ANONPAGES val:22 [ 40.858421] ================================================================== [ 40.859513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.860788] Read of size 8 at addr ffff88800f94aed8 by task sshd/219 [ 40.861721] [ 40.861982] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.863031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.864229] Call Trace: [ 40.864609] [ 40.864944] dump_stack_lvl+0x91/0xf0 [ 40.865528] print_report+0xcc/0x620 [ 40.866107] ? __virt_addr_valid+0x102/0x340 [ 40.866773] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.867519] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.868259] kasan_report+0xbe/0xf0 [ 40.868817] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.869595] vma_interval_tree_remove+0xc75/0xec0 [ 40.870329] vma_prepare+0xc54/0x11a0 [ 40.870900] __split_vma+0x5af/0x950 [ 40.871463] ? __pfx___split_vma+0x10/0x10 [ 40.872103] ? find_held_lock+0x2c/0x110 [ 40.872728] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.873414] ? lock_is_held_type+0x9f/0x120 [ 40.874063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.874786] ? mtree_range_walk+0x632/0x900 [ 40.875450] ? mas_walk+0x5c7/0x7c0 [ 40.876018] do_vmi_munmap+0x1f1/0x2b0 [ 40.876602] mmap_region+0x1f9/0x2660 [ 40.877177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.877805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.878678] ? __pfx_lock_acquire+0x10/0x10 [ 40.879323] ? __pfx_mmap_region+0x10/0x10 [ 40.879956] ? security_mmap_addr+0x7d/0xa0 [ 40.880606] ? get_unmapped_area+0x1f5/0x3f0 [ 40.881270] do_mmap+0x854/0xf00 [ 40.881799] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.882396] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.883071] ksys_mmap_pgoff+0x3af/0x500 [ 40.883670] do_syscall_64+0x3f/0x90 [ 40.884246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.885024] RIP: 0033:0x7f26ee0b3d82 [ 40.885586] 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 [ 40.888176] RSP: 002b:00007ffcf5cb6f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.889276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26ee0b3d82 [ 40.890304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26ed4ed000 [ 40.891347] RBP: 00007f26ed4ed000 R08: 0000000000000009 R09: 0000000000001000 [ 40.892382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ae7ee4f70 [ 40.893429] R13: 00007ffcf5cb6f70 R14: 00007ffcf5cb6fa0 R15: 00007ffcf5cb7300 [ 40.894266] [ 40.894548] [ 40.894754] Allocated by task 212: [ 40.895158] kasan_save_stack+0x22/0x50 [ 40.895704] kasan_set_track+0x25/0x30 [ 40.896277] __kasan_slab_alloc+0x59/0x70 [ 40.896796] kmem_cache_alloc+0x16b/0x370 [ 40.897295] vm_area_dup+0x20/0x160 [ 40.897765] __split_vma+0x170/0x950 [ 40.898207] split_vma+0xc6/0x110 [ 40.898643] mprotect_fixup+0x8d2/0xb30 [ 40.899127] do_mprotect_pkey+0x87e/0xd40 [ 40.899641] __x64_sys_mprotect+0x78/0xc0 [ 40.900136] do_syscall_64+0x3f/0x90 [ 40.900597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.901207] [ 40.901473] Freed by task 202: [ 40.901864] kasan_save_stack+0x22/0x50 [ 40.902343] kasan_set_track+0x25/0x30 [ 40.902827] kasan_save_free_info+0x2b/0x50 [ 40.903334] __kasan_slab_free+0x10a/0x190 [ 40.903872] kmem_cache_free+0x10d/0x4d0 [ 40.904368] rcu_core+0x8c8/0x2860 [ 40.904804] __do_softirq+0x1b7/0x7d4 [ 40.905263] [ 40.905474] Last potentially related work creation: [ 40.906061] kasan_save_stack+0x22/0x50 [ 40.906552] __kasan_record_aux_stack+0x8e/0xa0 [ 40.907098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.907718] remove_vma+0x139/0x170 [ 40.908151] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.908716] do_vmi_munmap+0x1f1/0x2b0 [ 40.909183] __vm_munmap+0x138/0x3a0 [ 40.909687] __x64_sys_munmap+0x59/0x80 [ 40.910172] do_syscall_64+0x3f/0x90 [ 40.910638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.911248] [ 40.911456] The buggy address belongs to the object at ffff88800f94ae80 [ 40.911456] which belongs to the cache vm_area_struct of size 168 [ 40.912856] The buggy address is located 88 bytes inside of [ 40.912856] freed 168-byte region [ffff88800f94ae80, ffff88800f94af28) [ 40.914278] [ 40.914509] The buggy address belongs to the physical page: [ 40.915199] page:0000000066e6fc26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf94a [ 40.916298] memcg:ffff88801660fb01 [ 40.916746] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.917397] page_type: 0xffffffff() [ 40.917881] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.918834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801660fb01 [ 40.919748] page dumped because: kasan: bad access detected [ 40.920415] [ 40.920655] Memory state around the buggy address: [ 40.921245] ffff88800f94ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.922131] ffff88800f94ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.923035] >ffff88800f94ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.923896] ^ [ 40.924637] ffff88800f94af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.925570] ffff88800f94af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.926424] ================================================================== [ 40.927402] Disabling lock debugging due to kernel taint [ 43.754991] BUG: Bad rss-counter state mm:0000000023f49ff3 type:MM_FILEPAGES val:33 [ 43.756252] BUG: Bad rss-counter state mm:0000000023f49ff3 type:MM_ANONPAGES val:22 [ 44.215164] BUG: Bad rss-counter state mm:00000000737ef866 type:MM_FILEPAGES val:33 [ 44.216716] BUG: Bad rss-counter state mm:00000000737ef866 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30057' (ECDSA) to the list of known hosts. 2023/06/20 07:11:52 fuzzer started 2023/06/20 07:11:52 dialing manager at localhost:44161 2023/06/20 07:11:52 checking machine... 2023/06/20 07:11:52 checking revisions... [ 44.965860] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:11:52 testing simple program... [ 45.014290] cgroup: Unknown subsys name 'net' [ 45.053936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:42 Registers: info registers vcpu 0 RAX=1ffffffff0bb1082 RBX=ffffffff85d88414 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88800e80f858 R8 =ffffffff86088c1a R9 =ffff88800e80f9a0 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fe76e31f900 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=00007fe76e8d6618 CR3=0000000016512000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fd894ef8948 CR3=000000000d8ba000 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=7a505aba2ffcd59aed491a5341d1dadc XMM02=ec2efd57dc4c00df000000000011cfe8 XMM03=583afcb84d3cab25000000000011d0b8 XMM04=353b0e5a1e00437000000000000ae988 XMM05=dfcdbad4f1609c370000000000134098 XMM06=27c70b1cd1fff4c40000000000132f00 XMM07=e042d86d42eb936e0000000000124818 XMM08=583afcb84d3cab25000000000011d0b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000