syzkaller login: [ 30.674108] BUG: Bad rss-counter state mm:00000000b970017f type:MM_FILEPAGES val:33 [ 30.675471] BUG: Bad rss-counter state mm:00000000b970017f type:MM_ANONPAGES val:22 [ 30.822367] ================================================================== [ 30.823332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.824397] Read of size 8 at addr ffff88801807b228 by task sshd/219 [ 30.825204] [ 30.825430] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827383] Call Trace: [ 30.827711] [ 30.828028] dump_stack_lvl+0x91/0xf0 [ 30.828559] print_report+0xcc/0x620 [ 30.829064] ? __virt_addr_valid+0x102/0x340 [ 30.829641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830934] kasan_report+0xbe/0xf0 [ 30.831436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832087] vma_interval_tree_remove+0xc75/0xec0 [ 30.832715] vma_prepare+0xc54/0x11a0 [ 30.833230] __split_vma+0x5af/0x950 [ 30.833723] ? __pfx___split_vma+0x10/0x10 [ 30.834273] ? find_held_lock+0x2c/0x110 [ 30.834802] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.835408] ? lock_is_held_type+0x9f/0x120 [ 30.835997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.836653] ? mtree_range_walk+0x632/0x900 [ 30.837250] ? mas_walk+0x5c7/0x7c0 [ 30.837737] do_vmi_munmap+0x1f1/0x2b0 [ 30.838270] mmap_region+0x1f9/0x2660 [ 30.838766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.839331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.840182] ? __pfx_lock_acquire+0x10/0x10 [ 30.840872] ? __pfx_mmap_region+0x10/0x10 [ 30.841565] ? security_mmap_addr+0x7d/0xa0 [ 30.842256] ? get_unmapped_area+0x1f5/0x3f0 [ 30.842966] do_mmap+0x854/0xf00 [ 30.843540] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844649] ksys_mmap_pgoff+0x3af/0x500 [ 30.845190] do_syscall_64+0x3f/0x90 [ 30.845693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846376] RIP: 0033:0x7f568851bd82 [ 30.846849] 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 [ 30.849135] RSP: 002b:00007ffddaff6728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.850105] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f568851bd82 [ 30.850988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5687955000 [ 30.851898] RBP: 00007f5687955000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852785] R10: 0000000000000812 R11: 0000000000000206 R12: 000056346ef0aec0 [ 30.853686] R13: 00007ffddaff6740 R14: 00007ffddaff6770 R15: 00007ffddaff6ad0 [ 30.854606] [ 30.854903] [ 30.855134] Allocated by task 212: [ 30.855597] kasan_save_stack+0x22/0x50 [ 30.856139] kasan_set_track+0x25/0x30 [ 30.856681] __kasan_slab_alloc+0x59/0x70 [ 30.857232] kmem_cache_alloc+0x16b/0x370 [ 30.857773] vm_area_dup+0x20/0x160 [ 30.858262] __split_vma+0x170/0x950 [ 30.858752] split_vma+0xc6/0x110 [ 30.859231] mprotect_fixup+0x8d2/0xb30 [ 30.859777] do_mprotect_pkey+0x87e/0xd40 [ 30.860345] __x64_sys_mprotect+0x78/0xc0 [ 30.860895] do_syscall_64+0x3f/0x90 [ 30.861399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862069] [ 30.862316] Freed by task 202: [ 30.862732] kasan_save_stack+0x22/0x50 [ 30.863276] kasan_set_track+0x25/0x30 [ 30.863817] kasan_save_free_info+0x2b/0x50 [ 30.864400] __kasan_slab_free+0x10a/0x190 [ 30.864953] kmem_cache_free+0x10d/0x4d0 [ 30.865508] rcu_core+0x8c8/0x2860 [ 30.865971] __do_softirq+0x1b7/0x7d4 [ 30.866487] [ 30.866705] Last potentially related work creation: [ 30.867344] kasan_save_stack+0x22/0x50 [ 30.867901] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869195] remove_vma+0x139/0x170 [ 30.869669] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870262] do_vmi_munmap+0x1f1/0x2b0 [ 30.870776] __vm_munmap+0x138/0x3a0 [ 30.871291] __x64_sys_munmap+0x59/0x80 [ 30.871830] do_syscall_64+0x3f/0x90 [ 30.872341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873024] [ 30.873257] The buggy address belongs to the object at ffff88801807b1d0 [ 30.873257] which belongs to the cache vm_area_struct of size 168 [ 30.874800] The buggy address is located 88 bytes inside of [ 30.874800] freed 168-byte region [ffff88801807b1d0, ffff88801807b278) [ 30.876305] [ 30.876528] The buggy address belongs to the physical page: [ 30.877223] page:00000000b3386afc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1807b [ 30.878361] memcg:ffff888019e77001 [ 30.878795] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.879474] page_type: 0xffffffff() [ 30.879964] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.880953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e77001 [ 30.881919] page dumped because: kasan: bad access detected [ 30.882623] [ 30.882849] Memory state around the buggy address: [ 30.883477] ffff88801807b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.884392] ffff88801807b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.885308] >ffff88801807b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.886203] ^ [ 30.886775] ffff88801807b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.887690] ffff88801807b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.888620] ================================================================== [ 30.889798] Disabling lock debugging due to kernel taint [ 32.841097] BUG: Bad rss-counter state mm:000000000319847e type:MM_FILEPAGES val:33 [ 32.842420] BUG: Bad rss-counter state mm:000000000319847e type:MM_ANONPAGES val:22 [ 33.327107] BUG: Bad rss-counter state mm:00000000ae80d42f type:MM_FILEPAGES val:33 [ 33.328378] BUG: Bad rss-counter state mm:00000000ae80d42f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58136' (ECDSA) to the list of known hosts. 2023/06/21 04:53:39 fuzzer started 2023/06/21 04:53:39 dialing manager at localhost:36067 2023/06/21 04:53:39 checking machine... 2023/06/21 04:53:39 checking revisions... [ 34.031575] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:53:39 testing simple program... [ 34.076205] cgroup: Unknown subsys name 'net' [ 34.137927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff816214b2 RDX=ffff888015811b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea0000612280 RSP=ffff8880147e7ba0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6d53 R12=ffff8880168fc048 R13=0000000016af8600 R14=ffff88800d6b9cb0 R15=0000000000000001 RIP=ffffffff814c0261 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 00007efc60b48900 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=00007efc5ff6fbf0 CR3=000000001457e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3605e36967cef30900000000000ae988 XMM05=4daaf939185e8b0a0000000000133910 XMM06=806171799158d9670000000000132700 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006d8480 RCX=ffffffff8176423f RDX=ffff88800f161b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea00006d8480 RSP=ffff88800fcbfbc0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800d9ef828 R13=0000000000000001 R14=ffff888016db7aa0 R15=ffffea00006d8480 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f70dc115900 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=00007f70dcc69044 CR3=000000000f312000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c1c120d6d72652e20322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000