syzkaller login: [ 30.802970] BUG: Bad rss-counter state mm:0000000068db080a type:MM_FILEPAGES val:33 [ 30.804077] BUG: Bad rss-counter state mm:0000000068db080a type:MM_ANONPAGES val:22 [ 30.986055] ================================================================== [ 30.987081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.988259] Read of size 8 at addr ffff88800d2c04e0 by task sshd/219 [ 30.989132] [ 30.989375] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.990321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.991428] Call Trace: [ 30.991785] [ 30.992097] dump_stack_lvl+0x91/0xf0 [ 30.992637] print_report+0xcc/0x620 [ 30.993168] ? __virt_addr_valid+0x102/0x340 [ 30.993777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995143] kasan_report+0xbe/0xf0 [ 30.995697] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996385] vma_interval_tree_remove+0xc75/0xec0 [ 30.997058] vma_prepare+0xc54/0x11a0 [ 30.997590] __split_vma+0x5af/0x950 [ 30.998119] ? __pfx___split_vma+0x10/0x10 [ 30.998712] ? find_held_lock+0x2c/0x110 [ 30.999300] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.999941] ? lock_is_held_type+0x9f/0x120 [ 31.000548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.001224] ? mtree_range_walk+0x632/0x900 [ 31.001843] ? mas_walk+0x5c7/0x7c0 [ 31.002372] do_vmi_munmap+0x1f1/0x2b0 [ 31.002921] mmap_region+0x1f9/0x2660 [ 31.003480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.004046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.004845] ? __pfx_lock_acquire+0x10/0x10 [ 31.005436] ? __pfx_mmap_region+0x10/0x10 [ 31.006025] ? security_mmap_addr+0x7d/0xa0 [ 31.006618] ? get_unmapped_area+0x1f5/0x3f0 [ 31.007225] do_mmap+0x854/0xf00 [ 31.007719] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.008272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.008899] ksys_mmap_pgoff+0x3af/0x500 [ 31.009456] do_syscall_64+0x3f/0x90 [ 31.009986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010712] RIP: 0033:0x7fb3536e0d82 [ 31.011213] 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 [ 31.013585] RSP: 002b:00007ffeb3158fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.014605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3536e0d82 [ 31.015558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb352b1a000 [ 31.016504] RBP: 00007fb352b1a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.017447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c36a7fec0 [ 31.018395] R13: 00007ffeb3158fd0 R14: 00007ffeb3159000 R15: 00007ffeb3159360 [ 31.019371] [ 31.019694] [ 31.019934] Allocated by task 212: [ 31.020406] kasan_save_stack+0x22/0x50 [ 31.020964] kasan_set_track+0x25/0x30 [ 31.021511] __kasan_slab_alloc+0x59/0x70 [ 31.022089] kmem_cache_alloc+0x16b/0x370 [ 31.022659] vm_area_dup+0x20/0x160 [ 31.023157] __split_vma+0x170/0x950 [ 31.023677] split_vma+0xc6/0x110 [ 31.024158] mprotect_fixup+0x8d2/0xb30 [ 31.024717] do_mprotect_pkey+0x87e/0xd40 [ 31.025289] __x64_sys_mprotect+0x78/0xc0 [ 31.025861] do_syscall_64+0x3f/0x90 [ 31.026384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027095] [ 31.027334] Freed by task 210: [ 31.027788] kasan_save_stack+0x22/0x50 [ 31.028342] kasan_set_track+0x25/0x30 [ 31.028888] kasan_save_free_info+0x2b/0x50 [ 31.029524] __kasan_slab_free+0x10a/0x190 [ 31.030113] kmem_cache_free+0x10d/0x4d0 [ 31.030672] rcu_core+0x8c8/0x2860 [ 31.031158] __do_softirq+0x1b7/0x7d4 [ 31.031699] [ 31.031939] Last potentially related work creation: [ 31.032590] kasan_save_stack+0x22/0x50 [ 31.033143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034488] remove_vma+0x139/0x170 [ 31.034985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035607] do_vmi_munmap+0x1f1/0x2b0 [ 31.036143] __vm_munmap+0x138/0x3a0 [ 31.036658] __x64_sys_munmap+0x59/0x80 [ 31.037208] do_syscall_64+0x3f/0x90 [ 31.037737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038457] [ 31.038692] The buggy address belongs to the object at ffff88800d2c0488 [ 31.038692] which belongs to the cache vm_area_struct of size 168 [ 31.040314] The buggy address is located 88 bytes inside of [ 31.040314] freed 168-byte region [ffff88800d2c0488, ffff88800d2c0530) [ 31.041845] [ 31.042080] The buggy address belongs to the physical page: [ 31.042799] page:000000000af71df3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd2c0 [ 31.043988] memcg:ffff88801892b301 [ 31.044452] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.045160] page_type: 0xffffffff() [ 31.045652] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.046653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801892b301 [ 31.047665] page dumped because: kasan: bad access detected [ 31.048388] [ 31.048627] Memory state around the buggy address: [ 31.049262] ffff88800d2c0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.050205] ffff88800d2c0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.051131] >ffff88800d2c0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.052067] ^ [ 31.052897] ffff88800d2c0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.053836] ffff88800d2c0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.054770] ================================================================== [ 31.055894] Disabling lock debugging due to kernel taint [ 32.874143] BUG: Bad rss-counter state mm:00000000b42b8501 type:MM_FILEPAGES val:33 [ 32.874871] BUG: Bad rss-counter state mm:00000000b42b8501 type:MM_ANONPAGES val:22 [ 33.359519] BUG: Bad rss-counter state mm:0000000012422d97 type:MM_FILEPAGES val:33 [ 33.360661] BUG: Bad rss-counter state mm:0000000012422d97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3459' (ECDSA) to the list of known hosts. 2023/06/21 07:33:22 fuzzer started 2023/06/21 07:33:22 dialing manager at localhost:36067 2023/06/21 07:33:22 checking machine... 2023/06/21 07:33:22 checking revisions... [ 34.101596] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:33:22 testing simple program... [ 34.150363] cgroup: Unknown subsys name 'net' [ 34.188695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:33:21 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800ffd2400 RCX=0000000000000000 RDX=ffff88800f521b40 RSI=ffffffff844a50a4 RDI=0000000000000005 RBP=ffff88800ffd241c RSP=ffff88801030fce0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff88800ffd2400 R13=ffffed1002061fcb R14=ffff88800ffd241c R15=ffff88801030fe59 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f322d6c6900 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=00007f322caca350 CR3=000000000c446000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1a79da571c63eec800000000000ae988 XMM05=fe175600086b91e20000000000131a00 XMM06=806171799158d967000000000012fd18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88800fc9dba8 RCX=ffffffff83869720 RDX=0000000000000003 RSI=0000000000000004 RDI=ffff888008fe8eac RBP=ffff888009e4fb18 RSP=ffff888009e4f9f8 R8 =0000000000000000 R9 =ffffed10011fd1ff R10=ffff888008fe8ffb R11=0000000000000000 R12=ffff888008fe8ff8 R13=00000000000000e4 R14=ffff888008fe8ea0 R15=ffff88800fc9db00 RIP=ffffffff83869755 RFL=00000046 [---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 00007fdb33174900 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=00007ffc43546000 CR3=000000000c606000 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