syzkaller login: [ 30.572777] BUG: Bad rss-counter state mm:000000003b84313a type:MM_FILEPAGES val:33 [ 30.574203] BUG: Bad rss-counter state mm:000000003b84313a type:MM_ANONPAGES val:22 [ 30.722128] ================================================================== [ 30.723045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.723996] Read of size 8 at addr ffff88800e984310 by task sshd/222 [ 30.724771] [ 30.724990] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.725963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.726957] Call Trace: [ 30.727374] [ 30.727664] dump_stack_lvl+0x91/0xf0 [ 30.728159] print_report+0xcc/0x620 [ 30.728640] ? __virt_addr_valid+0x102/0x340 [ 30.729190] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729805] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730439] kasan_report+0xbe/0xf0 [ 30.730912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731531] vma_interval_tree_remove+0xc75/0xec0 [ 30.732135] vma_prepare+0xc54/0x11a0 [ 30.732614] __split_vma+0x5af/0x950 [ 30.733090] ? __pfx___split_vma+0x10/0x10 [ 30.733618] ? find_held_lock+0x2c/0x110 [ 30.734140] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.734723] ? lock_is_held_type+0x9f/0x120 [ 30.735258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.735873] ? mtree_range_walk+0x632/0x900 [ 30.736426] ? mas_walk+0x5c7/0x7c0 [ 30.736904] do_vmi_munmap+0x1f1/0x2b0 [ 30.737393] mmap_region+0x1f9/0x2660 [ 30.737877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.738417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.739128] ? __pfx_lock_acquire+0x10/0x10 [ 30.739664] ? __pfx_mmap_region+0x10/0x10 [ 30.740196] ? security_mmap_addr+0x7d/0xa0 [ 30.740738] ? get_unmapped_area+0x1f5/0x3f0 [ 30.741292] do_mmap+0x854/0xf00 [ 30.741732] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.742230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.742809] ksys_mmap_pgoff+0x3af/0x500 [ 30.743316] do_syscall_64+0x3f/0x90 [ 30.743804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.744468] RIP: 0033:0x7f1569e10d82 [ 30.744931] 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 [ 30.747082] RSP: 002b:00007ffd06870d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.747999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1569e10d82 [ 30.748858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f156924a000 [ 30.749700] RBP: 00007f156924a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.750559] R10: 0000000000000812 R11: 0000000000000206 R12: 000056130c4fcb20 [ 30.751398] R13: 00007ffd06870d20 R14: 00007ffd06870d50 R15: 00007ffd068710b0 [ 30.752249] [ 30.752543] [ 30.752760] Allocated by task 215: [ 30.753190] kasan_save_stack+0x22/0x50 [ 30.753695] kasan_set_track+0x25/0x30 [ 30.754187] __kasan_slab_alloc+0x59/0x70 [ 30.754720] kmem_cache_alloc+0x16b/0x370 [ 30.755237] vm_area_dup+0x20/0x160 [ 30.755689] __split_vma+0x170/0x950 [ 30.756155] split_vma+0xc6/0x110 [ 30.756606] mprotect_fixup+0x8d2/0xb30 [ 30.757111] do_mprotect_pkey+0x87e/0xd40 [ 30.757628] __x64_sys_mprotect+0x78/0xc0 [ 30.758152] do_syscall_64+0x3f/0x90 [ 30.758651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759302] [ 30.759515] Freed by task 215: [ 30.759909] kasan_save_stack+0x22/0x50 [ 30.760414] kasan_set_track+0x25/0x30 [ 30.760911] kasan_save_free_info+0x2b/0x50 [ 30.761446] __kasan_slab_free+0x10a/0x190 [ 30.761984] kmem_cache_free+0x10d/0x4d0 [ 30.762505] rcu_core+0x8c8/0x2860 [ 30.762947] __do_softirq+0x1b7/0x7d4 [ 30.763422] [ 30.763641] Last potentially related work creation: [ 30.764219] kasan_save_stack+0x22/0x50 [ 30.764719] __kasan_record_aux_stack+0x8e/0xa0 [ 30.765289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765932] remove_vma+0x139/0x170 [ 30.766394] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766956] do_vmi_munmap+0x1f1/0x2b0 [ 30.767437] __vm_munmap+0x138/0x3a0 [ 30.767902] __x64_sys_munmap+0x59/0x80 [ 30.768397] do_syscall_64+0x3f/0x90 [ 30.768880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769530] [ 30.769747] The buggy address belongs to the object at ffff88800e9842b8 [ 30.769747] which belongs to the cache vm_area_struct of size 168 [ 30.771218] The buggy address is located 88 bytes inside of [ 30.771218] freed 168-byte region [ffff88800e9842b8, ffff88800e984360) [ 30.772617] [ 30.772835] The buggy address belongs to the physical page: [ 30.773482] page:00000000ac15f91d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe984 [ 30.774567] memcg:ffff88801a236d01 [ 30.774991] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.775638] page_type: 0xffffffff() [ 30.776090] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.777006] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a236d01 [ 30.777901] page dumped because: kasan: bad access detected [ 30.778588] [ 30.778805] Memory state around the buggy address: [ 30.779384] ffff88800e984200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.780230] ffff88800e984280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.781077] >ffff88800e984300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.781928] ^ [ 30.782399] ffff88800e984380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.783254] ffff88800e984400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.784106] ================================================================== [ 30.785066] Disabling lock debugging due to kernel taint [ 32.711521] BUG: Bad rss-counter state mm:00000000dcc45280 type:MM_FILEPAGES val:33 [ 32.712322] BUG: Bad rss-counter state mm:00000000dcc45280 type:MM_ANONPAGES val:22 [ 33.221899] BUG: Bad rss-counter state mm:00000000f81005d6 type:MM_FILEPAGES val:33 [ 33.223094] BUG: Bad rss-counter state mm:00000000f81005d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59778' (ECDSA) to the list of known hosts. 2023/06/20 17:05:43 fuzzer started 2023/06/20 17:05:43 dialing manager at localhost:36067 2023/06/20 17:05:43 checking machine... 2023/06/20 17:05:43 checking revisions... [ 33.850287] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:05:44 testing simple program... [ 33.890676] cgroup: Unknown subsys name 'net' [ 33.934141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff888019c051c0 RSI=ffffffff83871a86 RDI=0000000000000005 RBP=ffff888008f65000 RSP=ffff88800f02fb18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=00000a6700000a67 R12=ffff888008f65080 R13=ffff88801ca1e280 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff83871a86 RFL=00000293 [--S-A-C] 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 00007f429c516900 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=00007f429cacd618 CR3=000000001a358000 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=35303a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3233325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f9a9ceba600 CR3=00000000102c2000 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=cea4c760430503a84e42df6488fcf698 XMM02=2c67c8bc2e329bc30000000000119d78 XMM03=fb795ef6d65770560000000000121318 XMM04=eef193670bd71cd300000000000ae988 XMM05=5a9d233068761c4a00000000001314b0 XMM06=db20f175d54767f00000000000131338 XMM07=e042d86d42eb936e0000000000121598 XMM08=8225d42fe444ad9a0000000000119dd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000