syzkaller login: [ 31.218107] BUG: Bad rss-counter state mm:00000000dad154ce type:MM_FILEPAGES val:33 [ 31.219310] BUG: Bad rss-counter state mm:00000000dad154ce type:MM_ANONPAGES val:22 [ 31.392751] ================================================================== [ 31.393855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.394974] Read of size 8 at addr ffff88800c43c798 by task sshd/221 [ 31.396059] [ 31.396349] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.397334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.398339] Call Trace: [ 31.398659] [ 31.398951] dump_stack_lvl+0x91/0xf0 [ 31.399443] print_report+0xcc/0x620 [ 31.399941] ? __virt_addr_valid+0x102/0x340 [ 31.400517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401771] kasan_report+0xbe/0xf0 [ 31.402251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402883] vma_interval_tree_remove+0xc75/0xec0 [ 31.403485] vma_prepare+0xc54/0x11a0 [ 31.403984] __split_vma+0x5af/0x950 [ 31.404480] ? __pfx___split_vma+0x10/0x10 [ 31.405027] ? find_held_lock+0x2c/0x110 [ 31.405569] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.406152] ? lock_is_held_type+0x9f/0x120 [ 31.406706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.407335] ? mtree_range_walk+0x632/0x900 [ 31.407904] ? mas_walk+0x5c7/0x7c0 [ 31.408420] do_vmi_munmap+0x1f1/0x2b0 [ 31.408919] mmap_region+0x1f9/0x2660 [ 31.409474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.410089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.410845] ? __pfx_lock_acquire+0x10/0x10 [ 31.411390] ? __pfx_mmap_region+0x10/0x10 [ 31.411946] ? security_mmap_addr+0x7d/0xa0 [ 31.412490] ? get_unmapped_area+0x1f5/0x3f0 [ 31.413065] do_mmap+0x854/0xf00 [ 31.413510] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.414016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.414610] ksys_mmap_pgoff+0x3af/0x500 [ 31.415123] do_syscall_64+0x3f/0x90 [ 31.415617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416293] RIP: 0033:0x7fa690f74d82 [ 31.416758] 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 [ 31.418973] RSP: 002b:00007ffe5ee02f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.419920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa690f74d82 [ 31.420793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6903ae000 [ 31.421666] RBP: 00007fa6903ae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.422547] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a697dbeec0 [ 31.423417] R13: 00007ffe5ee02fa0 R14: 00007ffe5ee02fd0 R15: 00007ffe5ee03330 [ 31.424300] [ 31.424597] [ 31.424815] Allocated by task 214: [ 31.425253] kasan_save_stack+0x22/0x50 [ 31.425772] kasan_set_track+0x25/0x30 [ 31.426275] __kasan_slab_alloc+0x59/0x70 [ 31.426808] kmem_cache_alloc+0x16b/0x370 [ 31.427335] vm_area_dup+0x20/0x160 [ 31.427797] __split_vma+0x170/0x950 [ 31.428296] split_vma+0xc6/0x110 [ 31.428745] mprotect_fixup+0x8d2/0xb30 [ 31.429269] do_mprotect_pkey+0x87e/0xd40 [ 31.429798] __x64_sys_mprotect+0x78/0xc0 [ 31.430341] do_syscall_64+0x3f/0x90 [ 31.430832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431488] [ 31.431713] Freed by task 19: [ 31.432127] kasan_save_stack+0x22/0x50 [ 31.432636] kasan_set_track+0x25/0x30 [ 31.433148] kasan_save_free_info+0x2b/0x50 [ 31.433691] __kasan_slab_free+0x10a/0x190 [ 31.434226] kmem_cache_free+0x10d/0x4d0 [ 31.434736] rcu_core+0x8c8/0x2860 [ 31.435182] __do_softirq+0x1b7/0x7d4 [ 31.435665] [ 31.435887] Last potentially related work creation: [ 31.436575] kasan_save_stack+0x22/0x50 [ 31.437095] __kasan_record_aux_stack+0x8e/0xa0 [ 31.437678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.438339] remove_vma+0x139/0x170 [ 31.438811] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.439384] do_vmi_munmap+0x1f1/0x2b0 [ 31.439877] __vm_munmap+0x138/0x3a0 [ 31.440363] __x64_sys_munmap+0x59/0x80 [ 31.440860] do_syscall_64+0x3f/0x90 [ 31.441340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441997] [ 31.442213] The buggy address belongs to the object at ffff88800c43c740 [ 31.442213] which belongs to the cache vm_area_struct of size 168 [ 31.443719] The buggy address is located 88 bytes inside of [ 31.443719] freed 168-byte region [ffff88800c43c740, ffff88800c43c7e8) [ 31.445149] [ 31.445369] The buggy address belongs to the physical page: [ 31.446040] page:00000000fa46b4d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc43c [ 31.447151] memcg:ffff88800e2a3a01 [ 31.447589] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.448280] page_type: 0xffffffff() [ 31.448734] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.449683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2a3a01 [ 31.450605] page dumped because: kasan: bad access detected [ 31.451278] [ 31.451498] Memory state around the buggy address: [ 31.452086] ffff88800c43c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.452969] ffff88800c43c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.453835] >ffff88800c43c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.454692] ^ [ 31.455191] ffff88800c43c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.456052] ffff88800c43c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.456938] ================================================================== [ 31.457891] Disabling lock debugging due to kernel taint [ 34.453767] BUG: Bad rss-counter state mm:00000000d23a64d7 type:MM_FILEPAGES val:33 [ 34.454761] BUG: Bad rss-counter state mm:00000000d23a64d7 type:MM_ANONPAGES val:22 [ 34.924358] BUG: Bad rss-counter state mm:000000000498a8ef type:MM_FILEPAGES val:33 [ 34.925553] BUG: Bad rss-counter state mm:000000000498a8ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4708' (ECDSA) to the list of known hosts. 2023/06/19 22:20:53 fuzzer started 2023/06/19 22:20:53 dialing manager at localhost:44161 2023/06/19 22:20:53 checking machine... 2023/06/19 22:20:53 checking revisions... [ 35.624113] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:20:53 testing simple program... [ 35.679521] cgroup: Unknown subsys name 'net' [ 35.734863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:52 Registers: info registers vcpu 0 RAX=ffffffff83684ee8 RBX=ffffffff85fa78c8 RCX=ffffffff83684ed8 RDX=0000000000000000 RSI=ffffffff863b7b2e RDI=ffffffff85fa78c0 RBP=ffffffff85fa78c0 RSP=ffff88801b55f5f0 R8 =ffffffff863b7b2e R9 =ffff88801b55f6e8 R10=0000000000038001 R11=000000000008b93b R12=ffffffff85fa78c4 R13=ffffffff85fa78c0 R14=ffffffff85fa78c0 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000287 [--S--PC] 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 00007f7d0082d900 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=00007ffd54d34000 CR3=000000001a2f2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e1388 RSI=ffffffff8110261f RDI=ffff88806cf09b6c RBP=ffff88806cf09c40 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801b788410 RIP=ffffffff813ad4f9 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 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=00007f0f1e281c80 CR3=000000000da2a000 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=087045e933a527a5db409b00f1dcac0e XMM02=000000000011c260eff9b2d0a8fce9cb XMM03=000000000011c3302c67c8bc2e329bc3 XMM04=c9f75ba4227b3aa300000000000ae988 XMM05=e4cb8bb95a7664b60000000000133700 XMM06=3a2bdbef7eb9f2da0000000000132568 XMM07=e042d86d42eb936e0000000000123e98 XMM08=f313a14eb7aa51dc000000000011c330 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000