syzkaller login: [ 30.191933] sshd (213) used greatest stack depth: 24128 bytes left [ 30.193696] BUG: Bad rss-counter state mm:0000000048e7b50c type:MM_FILEPAGES val:33 [ 30.194828] BUG: Bad rss-counter state mm:0000000048e7b50c type:MM_ANONPAGES val:22 [ 30.359037] ================================================================== [ 30.360190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.361494] Read of size 8 at addr ffff88800dd0e6b0 by task sshd/220 [ 30.362553] [ 30.362823] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.363974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.365075] Call Trace: [ 30.365411] [ 30.365724] dump_stack_lvl+0x91/0xf0 [ 30.366273] print_report+0xcc/0x620 [ 30.366779] ? __virt_addr_valid+0x102/0x340 [ 30.367351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368667] kasan_report+0xbe/0xf0 [ 30.369164] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.369820] vma_interval_tree_remove+0xc75/0xec0 [ 30.370498] vma_prepare+0xc54/0x11a0 [ 30.371001] __split_vma+0x5af/0x950 [ 30.371488] ? __pfx___split_vma+0x10/0x10 [ 30.372031] ? find_held_lock+0x2c/0x110 [ 30.372566] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.373177] ? lock_is_held_type+0x9f/0x120 [ 30.373761] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.374427] ? mtree_range_walk+0x632/0x900 [ 30.374996] ? mas_walk+0x5c7/0x7c0 [ 30.375487] do_vmi_munmap+0x1f1/0x2b0 [ 30.376006] mmap_region+0x1f9/0x2660 [ 30.376507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.377055] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.377829] ? __pfx_lock_acquire+0x10/0x10 [ 30.378419] ? __pfx_mmap_region+0x10/0x10 [ 30.378975] ? security_mmap_addr+0x7d/0xa0 [ 30.379533] ? get_unmapped_area+0x1f5/0x3f0 [ 30.380102] do_mmap+0x854/0xf00 [ 30.380607] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.381125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.381716] ksys_mmap_pgoff+0x3af/0x500 [ 30.382267] do_syscall_64+0x3f/0x90 [ 30.382767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383439] RIP: 0033:0x7f5be9015d82 [ 30.383913] 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 [ 30.386200] RSP: 002b:00007ffe18d41928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.387172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5be9015d82 [ 30.388047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5be844f000 [ 30.388944] RBP: 00007f5be844f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.389817] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560151523ec0 [ 30.390739] R13: 00007ffe18d41940 R14: 00007ffe18d41970 R15: 00007ffe18d41cd0 [ 30.391628] [ 30.391937] [ 30.392155] Allocated by task 213: [ 30.392620] kasan_save_stack+0x22/0x50 [ 30.393147] kasan_set_track+0x25/0x30 [ 30.393660] __kasan_slab_alloc+0x59/0x70 [ 30.394232] kmem_cache_alloc+0x16b/0x370 [ 30.394765] vm_area_dup+0x20/0x160 [ 30.395257] __split_vma+0x170/0x950 [ 30.395742] split_vma+0xc6/0x110 [ 30.396193] mprotect_fixup+0x8d2/0xb30 [ 30.396736] do_mprotect_pkey+0x87e/0xd40 [ 30.397297] __x64_sys_mprotect+0x78/0xc0 [ 30.397858] do_syscall_64+0x3f/0x90 [ 30.398363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.399086] [ 30.399319] Freed by task 13: [ 30.399728] kasan_save_stack+0x22/0x50 [ 30.400295] kasan_set_track+0x25/0x30 [ 30.400838] kasan_save_free_info+0x2b/0x50 [ 30.401432] __kasan_slab_free+0x10a/0x190 [ 30.402007] kmem_cache_free+0x10d/0x4d0 [ 30.402562] rcu_core+0x8c8/0x2860 [ 30.403126] __do_softirq+0x1b7/0x7d4 [ 30.403640] [ 30.403870] Last potentially related work creation: [ 30.404559] kasan_save_stack+0x22/0x50 [ 30.405110] __kasan_record_aux_stack+0x8e/0xa0 [ 30.405728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.406415] remove_vma+0x139/0x170 [ 30.406901] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.407512] do_vmi_munmap+0x1f1/0x2b0 [ 30.408061] __vm_munmap+0x138/0x3a0 [ 30.408608] __x64_sys_munmap+0x59/0x80 [ 30.409138] do_syscall_64+0x3f/0x90 [ 30.409643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.410354] [ 30.410583] The buggy address belongs to the object at ffff88800dd0e658 [ 30.410583] which belongs to the cache vm_area_struct of size 168 [ 30.412224] The buggy address is located 88 bytes inside of [ 30.412224] freed 168-byte region [ffff88800dd0e658, ffff88800dd0e700) [ 30.413781] [ 30.414012] The buggy address belongs to the physical page: [ 30.414718] page:000000005da3f38d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd0e [ 30.415876] memcg:ffff88800e0fca01 [ 30.416366] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.417129] page_type: 0xffffffff() [ 30.417608] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.418617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0fca01 [ 30.419612] page dumped because: kasan: bad access detected [ 30.420353] [ 30.420605] Memory state around the buggy address: [ 30.421260] ffff88800dd0e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.422179] ffff88800dd0e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.423173] >ffff88800dd0e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.424228] ^ [ 30.424969] ffff88800dd0e700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.425997] ffff88800dd0e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.426840] ================================================================== [ 30.427747] Disabling lock debugging due to kernel taint [ 32.910425] BUG: Bad rss-counter state mm:0000000033845d7d type:MM_FILEPAGES val:33 [ 32.911452] BUG: Bad rss-counter state mm:0000000033845d7d type:MM_ANONPAGES val:22 [ 33.388804] BUG: Bad rss-counter state mm:000000004708b203 type:MM_FILEPAGES val:33 [ 33.389857] BUG: Bad rss-counter state mm:000000004708b203 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27906' (ECDSA) to the list of known hosts. 2023/06/21 03:03:32 fuzzer started 2023/06/21 03:03:33 dialing manager at localhost:36067 2023/06/21 03:03:33 checking machine... 2023/06/21 03:03:33 checking revisions... [ 34.145034] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:03:33 testing simple program... [ 34.190981] cgroup: Unknown subsys name 'net' [ 34.257924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:03:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000055ee665a4360 RCX=000000000000001e RDX=0000000000000001 RSI=0000000000000000 RDI=000055ee665a4360 RBP=000055ee665a4360 RSP=00007fff92174748 R8 =000055ee665b5690 R9 =0000000000000001 R10=0000000000000017 R11=000055ee665a8290 R12=000055ee665a4620 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007f820785d302 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8206ce5900 00000000 00000000 GS =0000 0000000000000000 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=00007f82060fca00 CR3=000000000cec2000 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=000000000010ac202fccd54c36d8a3f3 XMM01=d2325d8c1e2892ba664472ecb322da7d XMM02=000000000011a9c0eff9b2d0a8fce9cb XMM03=000000000011aa902c67c8bc2e329bc3 XMM04=8167677a4e1aad7b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131e20 XMM06=179ecd87bc8d1c490000000000130c88 XMM07=e042d86d42eb936e0000000000122118 XMM08=5536966d5839f8ba000000000011aa90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff888016e983f4 RBP=ffff888016e98000 RSP=ffff888016f4f910 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=dffffc0000000000 RIP=ffffffff813744e1 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 00007f632a13f900 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=00007ffe2b6d0000 CR3=000000000f63a000 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=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