syzkaller login: [ 127.748847] BUG: Bad rss-counter state mm:00000000b67d3315 type:MM_FILEPAGES val:33 [ 127.749571] BUG: Bad rss-counter state mm:00000000b67d3315 type:MM_ANONPAGES val:22 [ 127.888307] ================================================================== [ 127.889009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 127.889754] Read of size 8 at addr ffff88800ca23d08 by task sshd/221 [ 127.890347] [ 127.890520] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 127.891317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 127.892081] Call Trace: [ 127.892427] [ 127.892647] dump_stack_lvl+0x91/0xf0 [ 127.893028] print_report+0xcc/0x620 [ 127.893399] ? __virt_addr_valid+0x102/0x340 [ 127.893833] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.894309] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.894804] kasan_report+0xbe/0xf0 [ 127.895172] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.895643] vma_interval_tree_remove+0xc75/0xec0 [ 127.896080] vma_prepare+0xc54/0x11a0 [ 127.896412] __split_vma+0x5af/0x950 [ 127.896731] ? __pfx___split_vma+0x10/0x10 [ 127.897094] ? find_held_lock+0x2c/0x110 [ 127.897448] do_vmi_align_munmap+0x2ba/0x11f0 [ 127.897846] ? lock_is_held_type+0x9f/0x120 [ 127.898207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 127.898621] ? mtree_range_walk+0x632/0x900 [ 127.898993] ? mas_walk+0x5c7/0x7c0 [ 127.899320] do_vmi_munmap+0x1f1/0x2b0 [ 127.899652] mmap_region+0x1f9/0x2660 [ 127.899983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 127.900337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 127.900838] ? __pfx_lock_acquire+0x10/0x10 [ 127.901220] ? __pfx_mmap_region+0x10/0x10 [ 127.901593] ? security_mmap_addr+0x7d/0xa0 [ 127.901961] ? get_unmapped_area+0x1f5/0x3f0 [ 127.902353] do_mmap+0x854/0xf00 [ 127.902667] vm_mmap_pgoff+0x1a6/0x3a0 [ 127.903020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 127.903418] ksys_mmap_pgoff+0x3af/0x500 [ 127.903782] do_syscall_64+0x3f/0x90 [ 127.904129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.904593] RIP: 0033:0x7f5a144f0d82 [ 127.904923] 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 [ 127.906437] RSP: 002b:00007ffd721a09e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 127.907086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a144f0d82 [ 127.907699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a1392a000 [ 127.908316] RBP: 00007f5a1392a000 R08: 0000000000000009 R09: 0000000000001000 [ 127.908921] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e713d50b20 [ 127.909534] R13: 00007ffd721a0a00 R14: 00007ffd721a0a30 R15: 00007ffd721a0d90 [ 127.910149] [ 127.910358] [ 127.910512] Allocated by task 214: [ 127.910822] kasan_save_stack+0x22/0x50 [ 127.911179] kasan_set_track+0x25/0x30 [ 127.911529] __kasan_slab_alloc+0x59/0x70 [ 127.911902] kmem_cache_alloc+0x16b/0x370 [ 127.912283] vm_area_dup+0x20/0x160 [ 127.912602] __split_vma+0x170/0x950 [ 127.912936] split_vma+0xc6/0x110 [ 127.913246] mprotect_fixup+0x8d2/0xb30 [ 127.913604] do_mprotect_pkey+0x87e/0xd40 [ 127.913971] __x64_sys_mprotect+0x78/0xc0 [ 127.914342] do_syscall_64+0x3f/0x90 [ 127.914676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.915136] [ 127.915288] Freed by task 214: [ 127.915566] kasan_save_stack+0x22/0x50 [ 127.915929] kasan_set_track+0x25/0x30 [ 127.916288] kasan_save_free_info+0x2b/0x50 [ 127.916671] __kasan_slab_free+0x10a/0x190 [ 127.917045] kmem_cache_free+0x10d/0x4d0 [ 127.917411] rcu_core+0x8c8/0x2860 [ 127.917726] __do_softirq+0x1b7/0x7d4 [ 127.918062] [ 127.918221] Last potentially related work creation: [ 127.918632] kasan_save_stack+0x22/0x50 [ 127.918994] __kasan_record_aux_stack+0x8e/0xa0 [ 127.919399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 127.919857] remove_vma+0x139/0x170 [ 127.920203] do_vmi_align_munmap+0xd4a/0x11f0 [ 127.920602] do_vmi_munmap+0x1f1/0x2b0 [ 127.920949] __vm_munmap+0x138/0x3a0 [ 127.921273] __x64_sys_munmap+0x59/0x80 [ 127.921623] do_syscall_64+0x3f/0x90 [ 127.921958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.922407] [ 127.922557] The buggy address belongs to the object at ffff88800ca23cb0 [ 127.922557] which belongs to the cache vm_area_struct of size 168 [ 127.923608] The buggy address is located 88 bytes inside of [ 127.923608] freed 168-byte region [ffff88800ca23cb0, ffff88800ca23d58) [ 127.924589] [ 127.924741] The buggy address belongs to the physical page: [ 127.925217] page:00000000d7e51679 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca23 [ 127.925987] memcg:ffff88800a296901 [ 127.926288] flags: 0x100000000000200(slab|node=0|zone=1) [ 127.926755] page_type: 0xffffffff() [ 127.927077] raw: 0100000000000200 ffff88800879fc80 ffffea0000319d00 dead000000000004 [ 127.927732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a296901 [ 127.928395] page dumped because: kasan: bad access detected [ 127.928859] [ 127.929010] Memory state around the buggy address: [ 127.929419] ffff88800ca23c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 127.930032] ffff88800ca23c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 127.930638] >ffff88800ca23d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 127.931241] ^ [ 127.931549] ffff88800ca23d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 127.932169] ffff88800ca23e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 127.932774] ================================================================== [ 127.933471] Disabling lock debugging due to kernel taint [ 129.587967] BUG: Bad rss-counter state mm:00000000eb0fa79e type:MM_FILEPAGES val:33 [ 129.588677] BUG: Bad rss-counter state mm:00000000eb0fa79e type:MM_ANONPAGES val:22 [ 130.002393] BUG: Bad rss-counter state mm:000000007fef9bdb type:MM_FILEPAGES val:33 [ 130.003666] BUG: Bad rss-counter state mm:000000007fef9bdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39871' (ECDSA) to the list of known hosts. 2023/06/19 15:52:25 fuzzer started 2023/06/19 15:52:26 dialing manager at localhost:44161 2023/06/19 15:52:26 checking machine... 2023/06/19 15:52:26 checking revisions... [ 130.631477] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:52:26 testing simple program... [ 130.670917] cgroup: Unknown subsys name 'net' [ 130.709971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:50:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f596414220c RCX=0000000000000000 RDX=ffff888015a60000 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880162ff3e8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880162ff530 R13=0000000000000000 R14=ffff888015a60000 R15=0000000000092cc0 RIP=ffffffff814c081b 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 00007f5963c4f900 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=00007f5964204650 CR3=000000000e738000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000132 RDI=ffff8880142c03f4 RBP=ffffffff85264220 RSP=ffff8880142bfcc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000132 R13=0000000000000000 R14=ffff8880142c0000 R15=ffffffff818953b0 RIP=ffffffff8122e6b2 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 00007f01204fc900 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=00007f011f974c50 CR3=000000000d916000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=10f16902dab10e5200000000000ae988 XMM05=a1af9c62c48951440000000000148bd0 XMM06=c291bd5c70af25b900000000001479c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000