syzkaller login: [ 31.219485] BUG: Bad rss-counter state mm:0000000059fa536f type:MM_FILEPAGES val:33 [ 31.220781] BUG: Bad rss-counter state mm:0000000059fa536f type:MM_ANONPAGES val:22 [ 31.336098] ================================================================== [ 31.336824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.337555] Read of size 8 at addr ffff88800eb0b058 by task sshd/219 [ 31.338163] [ 31.338332] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.339022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.339910] Call Trace: [ 31.340164] [ 31.340424] dump_stack_lvl+0x91/0xf0 [ 31.340810] print_report+0xcc/0x620 [ 31.341186] ? __virt_addr_valid+0x102/0x340 [ 31.341627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342591] kasan_report+0xbe/0xf0 [ 31.342966] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343444] vma_interval_tree_remove+0xc75/0xec0 [ 31.343910] vma_prepare+0xc54/0x11a0 [ 31.344297] __split_vma+0x5af/0x950 [ 31.344656] ? __pfx___split_vma+0x10/0x10 [ 31.345011] ? find_held_lock+0x2c/0x110 [ 31.345361] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.345734] ? lock_is_held_type+0x9f/0x120 [ 31.346088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.346489] ? mtree_range_walk+0x632/0x900 [ 31.346852] ? mas_walk+0x5c7/0x7c0 [ 31.347164] do_vmi_munmap+0x1f1/0x2b0 [ 31.347487] mmap_region+0x1f9/0x2660 [ 31.347807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.348146] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.348622] ? __pfx_lock_acquire+0x10/0x10 [ 31.348978] ? __pfx_mmap_region+0x10/0x10 [ 31.349331] ? security_mmap_addr+0x7d/0xa0 [ 31.349679] ? get_unmapped_area+0x1f5/0x3f0 [ 31.350038] do_mmap+0x854/0xf00 [ 31.350325] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.350657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.351027] ksys_mmap_pgoff+0x3af/0x500 [ 31.351367] do_syscall_64+0x3f/0x90 [ 31.351681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352107] RIP: 0033:0x7fb3a353cd82 [ 31.352416] 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 [ 31.353830] RSP: 002b:00007fff71eec6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3a353cd82 [ 31.354990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3a2976000 [ 31.355550] RBP: 00007fb3a2976000 R08: 0000000000000009 R09: 0000000000001000 [ 31.356115] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558634accec0 [ 31.356676] R13: 00007fff71eec6d0 R14: 00007fff71eec700 R15: 00007fff71eeca60 [ 31.357243] [ 31.357432] [ 31.357575] Allocated by task 212: [ 31.357855] kasan_save_stack+0x22/0x50 [ 31.358188] kasan_set_track+0x25/0x30 [ 31.358515] __kasan_slab_alloc+0x59/0x70 [ 31.358860] kmem_cache_alloc+0x16b/0x370 [ 31.359203] vm_area_dup+0x20/0x160 [ 31.359502] __split_vma+0x170/0x950 [ 31.359809] split_vma+0xc6/0x110 [ 31.360097] mprotect_fixup+0x8d2/0xb30 [ 31.360434] do_mprotect_pkey+0x87e/0xd40 [ 31.360780] __x64_sys_mprotect+0x78/0xc0 [ 31.361126] do_syscall_64+0x3f/0x90 [ 31.361441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361865] [ 31.362008] Freed by task 212: [ 31.362268] kasan_save_stack+0x22/0x50 [ 31.362604] kasan_set_track+0x25/0x30 [ 31.362925] kasan_save_free_info+0x2b/0x50 [ 31.363274] __kasan_slab_free+0x10a/0x190 [ 31.363621] kmem_cache_free+0x10d/0x4d0 [ 31.363953] rcu_core+0x8c8/0x2860 [ 31.364256] __do_softirq+0x1b7/0x7d4 [ 31.364571] [ 31.364713] Last potentially related work creation: [ 31.365106] kasan_save_stack+0x22/0x50 [ 31.365439] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366244] remove_vma+0x139/0x170 [ 31.366541] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.366905] do_vmi_munmap+0x1f1/0x2b0 [ 31.367222] __vm_munmap+0x138/0x3a0 [ 31.367526] __x64_sys_munmap+0x59/0x80 [ 31.367855] do_syscall_64+0x3f/0x90 [ 31.368166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368600] [ 31.368741] The buggy address belongs to the object at ffff88800eb0b000 [ 31.368741] which belongs to the cache vm_area_struct of size 168 [ 31.369715] The buggy address is located 88 bytes inside of [ 31.369715] freed 168-byte region [ffff88800eb0b000, ffff88800eb0b0a8) [ 31.370633] [ 31.370772] The buggy address belongs to the physical page: [ 31.371210] page:00000000c1adfbd9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb0b [ 31.371922] memcg:ffff8880096aa901 [ 31.372201] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.372641] page_type: 0xffffffff() [ 31.372946] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.373558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096aa901 [ 31.374151] page dumped because: kasan: bad access detected [ 31.374589] [ 31.374733] Memory state around the buggy address: [ 31.375114] ffff88800eb0af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.375672] ffff88800eb0af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.376249] >ffff88800eb0b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.376805] ^ [ 31.377292] ffff88800eb0b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.377853] ffff88800eb0b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.378417] ================================================================== [ 31.379148] Disabling lock debugging due to kernel taint [ 32.971845] BUG: Bad rss-counter state mm:0000000015caf2dc type:MM_FILEPAGES val:33 [ 32.973367] BUG: Bad rss-counter state mm:0000000015caf2dc type:MM_ANONPAGES val:22 [ 33.463407] BUG: Bad rss-counter state mm:00000000a85b229c type:MM_FILEPAGES val:33 [ 33.464415] BUG: Bad rss-counter state mm:00000000a85b229c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19828' (ECDSA) to the list of known hosts. 2023/06/19 19:02:35 fuzzer started 2023/06/19 19:02:35 dialing manager at localhost:44161 2023/06/19 19:02:35 checking machine... 2023/06/19 19:02:35 checking revisions... [ 34.087420] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:02:35 testing simple program... [ 34.126806] cgroup: Unknown subsys name 'net' [ 34.176469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:02:34 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000000000 RCX=ffffffff8137ab83 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce35000 RSP=ffff88800da079a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3d010 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff88806ce3a2c0 R14=ffff888014799b40 R15=0000000000000001 RIP=ffffffff8137ab98 RFL=00000002 [-------] 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 00007f0a8b874900 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=00007f0a8ad01460 CR3=00000000145d6000 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=34e87acc06485980bd43df1f7540ebfa XMM02=2c67c8bc2e329bc3000000000011d860 XMM03=fb795ef6d65770560000000000124568 XMM04=a8500bed7ea9f6a600000000000ae988 XMM05=dfcdbad4f1609c370000000000134068 XMM06=1a8d5d1f1941793b0000000000132ed0 XMM07=e042d86d42eb936e00000000001247e8 XMM08=781ec78e7a1279f3000000000011d8c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016c151c0 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff110028c8f17 RSP=ffff8880146478a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff8880199de720 RIP=ffffffff812d8649 RFL=00000216 [----AP-] 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 00007ff593380900 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=00007ffdd0dd6000 CR3=000000000cbea000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000