syzkaller login: [ 30.699598] BUG: Bad rss-counter state mm:00000000cd3b24ef type:MM_FILEPAGES val:33 [ 30.700645] BUG: Bad rss-counter state mm:00000000cd3b24ef type:MM_ANONPAGES val:22 [ 30.815598] ================================================================== [ 30.816738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.817924] Read of size 8 at addr ffff888016f824e0 by task sshd/221 [ 30.819030] [ 30.819313] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.820389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.821681] Call Trace: [ 30.821913] [ 30.822109] dump_stack_lvl+0x91/0xf0 [ 30.822445] print_report+0xcc/0x620 [ 30.822784] ? __virt_addr_valid+0x102/0x340 [ 30.823176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824047] kasan_report+0xbe/0xf0 [ 30.824382] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824811] vma_interval_tree_remove+0xc75/0xec0 [ 30.825238] vma_prepare+0xc54/0x11a0 [ 30.825572] __split_vma+0x5af/0x950 [ 30.825898] ? __pfx___split_vma+0x10/0x10 [ 30.826269] ? find_held_lock+0x2c/0x110 [ 30.826628] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.827018] ? lock_is_held_type+0x9f/0x120 [ 30.827395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.827816] ? mtree_range_walk+0x632/0x900 [ 30.828199] ? mas_walk+0x5c7/0x7c0 [ 30.828527] do_vmi_munmap+0x1f1/0x2b0 [ 30.828867] mmap_region+0x1f9/0x2660 [ 30.829214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.829567] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.830056] ? __pfx_lock_acquire+0x10/0x10 [ 30.830424] ? __pfx_mmap_region+0x10/0x10 [ 30.830791] ? security_mmap_addr+0x7d/0xa0 [ 30.831160] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831540] do_mmap+0x854/0xf00 [ 30.831843] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832573] ksys_mmap_pgoff+0x3af/0x500 [ 30.832925] do_syscall_64+0x3f/0x90 [ 30.833281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833730] RIP: 0033:0x7f3836623d82 [ 30.834047] 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 [ 30.835521] RSP: 002b:00007ffc08128a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.836147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3836623d82 [ 30.836733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3835a5d000 [ 30.837327] RBP: 00007f3835a5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.837915] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631a8be2f60 [ 30.838507] R13: 00007ffc08128a70 R14: 00007ffc08128aa0 R15: 00007ffc08128e00 [ 30.839106] [ 30.839310] [ 30.839459] Allocated by task 214: [ 30.839757] kasan_save_stack+0x22/0x50 [ 30.840109] kasan_set_track+0x25/0x30 [ 30.840452] __kasan_slab_alloc+0x59/0x70 [ 30.840816] kmem_cache_alloc+0x16b/0x370 [ 30.841186] vm_area_dup+0x20/0x160 [ 30.841501] __split_vma+0x170/0x950 [ 30.841829] split_vma+0xc6/0x110 [ 30.842140] mprotect_fixup+0x8d2/0xb30 [ 30.842487] do_mprotect_pkey+0x87e/0xd40 [ 30.842851] __x64_sys_mprotect+0x78/0xc0 [ 30.843209] do_syscall_64+0x3f/0x90 [ 30.843538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843983] [ 30.844136] Freed by task 214: [ 30.844411] kasan_save_stack+0x22/0x50 [ 30.844764] kasan_set_track+0x25/0x30 [ 30.845125] kasan_save_free_info+0x2b/0x50 [ 30.845501] __kasan_slab_free+0x10a/0x190 [ 30.845866] kmem_cache_free+0x10d/0x4d0 [ 30.846216] rcu_core+0x8c8/0x2860 [ 30.846532] __do_softirq+0x1b7/0x7d4 [ 30.846867] [ 30.847015] Last potentially related work creation: [ 30.847421] kasan_save_stack+0x22/0x50 [ 30.847771] __kasan_record_aux_stack+0x8e/0xa0 [ 30.848170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.848615] remove_vma+0x139/0x170 [ 30.848925] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.849315] do_vmi_munmap+0x1f1/0x2b0 [ 30.849651] __vm_munmap+0x138/0x3a0 [ 30.849979] __x64_sys_munmap+0x59/0x80 [ 30.850325] do_syscall_64+0x3f/0x90 [ 30.850653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851101] [ 30.851249] The buggy address belongs to the object at ffff888016f82488 [ 30.851249] which belongs to the cache vm_area_struct of size 168 [ 30.852262] The buggy address is located 88 bytes inside of [ 30.852262] freed 168-byte region [ffff888016f82488, ffff888016f82530) [ 30.853237] [ 30.853389] The buggy address belongs to the physical page: [ 30.853844] page:00000000657061d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f82 [ 30.854602] memcg:ffff888009b29201 [ 30.854901] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.855344] page_type: 0xffffffff() [ 30.855654] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.856285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b29201 [ 30.856904] page dumped because: kasan: bad access detected [ 30.857378] [ 30.857528] Memory state around the buggy address: [ 30.857933] ffff888016f82380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.858525] ffff888016f82400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.859114] >ffff888016f82480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.859781] ^ [ 30.860303] ffff888016f82500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.860895] ffff888016f82580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861499] ================================================================== [ 30.862263] Disabling lock debugging due to kernel taint [ 32.827428] BUG: Bad rss-counter state mm:0000000018a7e268 type:MM_FILEPAGES val:33 [ 32.828117] BUG: Bad rss-counter state mm:0000000018a7e268 type:MM_ANONPAGES val:22 [ 33.298339] BUG: Bad rss-counter state mm:000000007f3c4956 type:MM_FILEPAGES val:33 [ 33.299547] BUG: Bad rss-counter state mm:000000007f3c4956 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50244' (ECDSA) to the list of known hosts. 2023/06/21 08:12:26 fuzzer started 2023/06/21 08:12:27 dialing manager at localhost:36067 2023/06/21 08:12:27 checking machine... 2023/06/21 08:12:27 checking revisions... [ 34.016067] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:12:27 testing simple program... [ 34.065288] cgroup: Unknown subsys name 'net' [ 34.117865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:26 Registers: info registers vcpu 0 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c114ab RBP=ffff888008d9f9b0 RSP=ffff888008d9f898 R8 =ffffffff8608a55a R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9f999 R15=ffff888008d9f958 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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 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=00007f906945e000 CR3=000000000c52e000 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=f58b010ba3fd89b7cb432feff5bd2b50 XMM02=0000000000119978eff9b2d0a8fce9cb XMM03=0000000000119a482c67c8bc2e329bc3 XMM04=913a7b2fdb0a33a500000000000ae988 XMM05=d90a8600eccd832c0000000000131e00 XMM06=c291bd5c70af25b90000000000130bf0 XMM07=fb795ef6d65770560000000000120e88 XMM08=2c67c8bc2e329bc300000000001199e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000098adab82 RCX=ffff88806cad5c10 RDX=0000000000000009 RSI=0000000000000003 RDI=00000000aeb1278c RBP=ffff88800fe951b0 RSP=ffff888008e379d0 R8 =00000000723dbe59 R9 =ffff888008e37940 R10=0000000000038001 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffff888008e37a38 R15=0000000000000009 RIP=ffffffff822704ed 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=00007fabae386618 CR3=000000000eb50000 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=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