syzkaller login: [ 31.363745] BUG: Bad rss-counter state mm:000000007f79a994 type:MM_FILEPAGES val:33 [ 31.365292] BUG: Bad rss-counter state mm:000000007f79a994 type:MM_ANONPAGES val:22 [ 31.524726] ================================================================== [ 31.525625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.526574] Read of size 8 at addr ffff8880199daed8 by task sshd/221 [ 31.527342] [ 31.527612] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.528494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.529469] Call Trace: [ 31.529809] [ 31.530099] dump_stack_lvl+0x91/0xf0 [ 31.530586] print_report+0xcc/0x620 [ 31.531084] ? __virt_addr_valid+0x102/0x340 [ 31.531634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.532254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.532873] kasan_report+0xbe/0xf0 [ 31.533346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533957] vma_interval_tree_remove+0xc75/0xec0 [ 31.534575] vma_prepare+0xc54/0x11a0 [ 31.535055] __split_vma+0x5af/0x950 [ 31.535533] ? __pfx___split_vma+0x10/0x10 [ 31.536060] ? find_held_lock+0x2c/0x110 [ 31.536584] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.537152] ? lock_is_held_type+0x9f/0x120 [ 31.537695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.538331] ? mtree_range_walk+0x632/0x900 [ 31.538874] ? mas_walk+0x5c7/0x7c0 [ 31.539363] do_vmi_munmap+0x1f1/0x2b0 [ 31.539867] mmap_region+0x1f9/0x2660 [ 31.540352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.540868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.541595] ? __pfx_lock_acquire+0x10/0x10 [ 31.542139] ? __pfx_mmap_region+0x10/0x10 [ 31.542671] ? security_mmap_addr+0x7d/0xa0 [ 31.543211] ? get_unmapped_area+0x1f5/0x3f0 [ 31.543769] do_mmap+0x854/0xf00 [ 31.544208] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.544706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.545269] ksys_mmap_pgoff+0x3af/0x500 [ 31.545776] do_syscall_64+0x3f/0x90 [ 31.546264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.546923] RIP: 0033:0x7f6e736f6d82 [ 31.547387] 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 [ 31.549547] RSP: 002b:00007ffc97f2ba78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.550479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e736f6d82 [ 31.551339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e72b30000 [ 31.552187] RBP: 00007f6e72b30000 R08: 0000000000000009 R09: 0000000000001000 [ 31.553044] R10: 0000000000000812 R11: 0000000000000206 R12: 000055732a82cec0 [ 31.553891] R13: 00007ffc97f2ba90 R14: 00007ffc97f2bac0 R15: 00007ffc97f2be20 [ 31.554761] [ 31.555060] [ 31.555276] Allocated by task 214: [ 31.555709] kasan_save_stack+0x22/0x50 [ 31.556215] kasan_set_track+0x25/0x30 [ 31.556711] __kasan_slab_alloc+0x59/0x70 [ 31.557243] kmem_cache_alloc+0x16b/0x370 [ 31.557759] vm_area_dup+0x20/0x160 [ 31.558218] __split_vma+0x170/0x950 [ 31.558680] split_vma+0xc6/0x110 [ 31.559117] mprotect_fixup+0x8d2/0xb30 [ 31.559625] do_mprotect_pkey+0x87e/0xd40 [ 31.560153] __x64_sys_mprotect+0x78/0xc0 [ 31.560685] do_syscall_64+0x3f/0x90 [ 31.561160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.561806] [ 31.562035] Freed by task 214: [ 31.562431] kasan_save_stack+0x22/0x50 [ 31.562931] kasan_set_track+0x25/0x30 [ 31.563426] kasan_save_free_info+0x2b/0x50 [ 31.563983] __kasan_slab_free+0x10a/0x190 [ 31.564510] kmem_cache_free+0x10d/0x4d0 [ 31.565019] rcu_core+0x8c8/0x2860 [ 31.565462] __do_softirq+0x1b7/0x7d4 [ 31.565941] [ 31.566164] Last potentially related work creation: [ 31.566752] kasan_save_stack+0x22/0x50 [ 31.567256] __kasan_record_aux_stack+0x8e/0xa0 [ 31.567830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.568474] remove_vma+0x139/0x170 [ 31.568925] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.569483] do_vmi_munmap+0x1f1/0x2b0 [ 31.569986] __vm_munmap+0x138/0x3a0 [ 31.570463] __x64_sys_munmap+0x59/0x80 [ 31.570963] do_syscall_64+0x3f/0x90 [ 31.571439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.572079] [ 31.572292] The buggy address belongs to the object at ffff8880199dae80 [ 31.572292] which belongs to the cache vm_area_struct of size 168 [ 31.573763] The buggy address is located 88 bytes inside of [ 31.573763] freed 168-byte region [ffff8880199dae80, ffff8880199daf28) [ 31.575185] [ 31.575403] The buggy address belongs to the physical page: [ 31.576057] page:000000000c068a99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199da [ 31.577152] memcg:ffff88800ca7be01 [ 31.577576] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.578233] page_type: 0xffffffff() [ 31.578690] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.579605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca7be01 [ 31.580517] page dumped because: kasan: bad access detected [ 31.581178] [ 31.581399] Memory state around the buggy address: [ 31.582001] ffff8880199dad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.582849] ffff8880199dae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.583710] >ffff8880199dae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.584556] ^ [ 31.585281] ffff8880199daf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.586142] ffff8880199daf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.586988] ================================================================== [ 31.587966] Disabling lock debugging due to kernel taint [ 33.790863] BUG: Bad rss-counter state mm:000000007d3ed2fb type:MM_FILEPAGES val:33 [ 33.791981] BUG: Bad rss-counter state mm:000000007d3ed2fb type:MM_ANONPAGES val:22 [ 34.275767] BUG: Bad rss-counter state mm:0000000063092f54 type:MM_FILEPAGES val:33 [ 34.276934] BUG: Bad rss-counter state mm:0000000063092f54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17424' (ECDSA) to the list of known hosts. 2023/06/21 02:50:00 fuzzer started 2023/06/21 02:50:01 dialing manager at localhost:36067 2023/06/21 02:50:01 checking machine... 2023/06/21 02:50:01 checking revisions... [ 34.912259] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:50:01 testing simple program... [ 34.955378] cgroup: Unknown subsys name 'net' [ 34.996266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:00 Registers: info registers vcpu 0 RAX=ffffffff83641157 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff83641157 RDI=ffff88806ce09b18 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008ab69 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88801641d1c0 R15=ffff88800db21300 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f33d6476900 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=000055bd7baa5818 CR3=000000000cacc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f7421747e33ad64d00000000000ae988 XMM05=0e6e0d23d6c13ca90000000000132748 XMM06=adc147f05f7df68400000000001317f0 XMM07=fb795ef6d65770560000000000121ad8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880165d0000 RSI=ffffffff818a31ba RDI=0000000000000001 RBP=00000007fc3d176f RSP=ffff88800d657988 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800d657b5c R13=911dd0895b755591 R14=ffff88800d657b20 R15=ffff888009ad2445 RIP=ffffffff814c0880 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 00007f34d34a8900 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=00007f34d3a5d650 CR3=000000000d9d2000 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=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