syzkaller login: [ 30.977074] BUG: Bad rss-counter state mm:00000000019ac3a6 type:MM_FILEPAGES val:33 [ 30.978879] BUG: Bad rss-counter state mm:00000000019ac3a6 type:MM_ANONPAGES val:22 [ 31.143383] ================================================================== [ 31.144307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.145226] Read of size 8 at addr ffff88800eb9c6b0 by task sshd/221 [ 31.145977] [ 31.146199] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.147156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.148132] Call Trace: [ 31.148449] [ 31.148746] dump_stack_lvl+0x91/0xf0 [ 31.149245] print_report+0xcc/0x620 [ 31.149725] ? __virt_addr_valid+0x102/0x340 [ 31.150281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150897] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.151555] kasan_report+0xbe/0xf0 [ 31.152029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152643] vma_interval_tree_remove+0xc75/0xec0 [ 31.153239] vma_prepare+0xc54/0x11a0 [ 31.153715] __split_vma+0x5af/0x950 [ 31.154184] ? __pfx___split_vma+0x10/0x10 [ 31.154702] ? find_held_lock+0x2c/0x110 [ 31.155211] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.155788] ? lock_is_held_type+0x9f/0x120 [ 31.156329] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.156924] ? mtree_range_walk+0x632/0x900 [ 31.157470] ? mas_walk+0x5c7/0x7c0 [ 31.157936] do_vmi_munmap+0x1f1/0x2b0 [ 31.158423] mmap_region+0x1f9/0x2660 [ 31.158896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.159431] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.160146] ? __pfx_lock_acquire+0x10/0x10 [ 31.160669] ? __pfx_mmap_region+0x10/0x10 [ 31.161192] ? security_mmap_addr+0x7d/0xa0 [ 31.161720] ? get_unmapped_area+0x1f5/0x3f0 [ 31.162257] do_mmap+0x854/0xf00 [ 31.162688] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.163183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.163750] ksys_mmap_pgoff+0x3af/0x500 [ 31.164255] do_syscall_64+0x3f/0x90 [ 31.164737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165385] RIP: 0033:0x7fc9bbf45d82 [ 31.165833] 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 [ 31.167941] RSP: 002b:00007ffd9289f188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.168833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9bbf45d82 [ 31.169678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9bb37f000 [ 31.170507] RBP: 00007fc9bb37f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.171365] R10: 0000000000000812 R11: 0000000000000206 R12: 000056189a300f70 [ 31.172297] R13: 00007ffd9289f1a0 R14: 00007ffd9289f1d0 R15: 00007ffd9289f530 [ 31.173343] [ 31.173702] [ 31.173976] Allocated by task 214: [ 31.174448] kasan_save_stack+0x22/0x50 [ 31.174991] kasan_set_track+0x25/0x30 [ 31.175539] __kasan_slab_alloc+0x59/0x70 [ 31.176066] kmem_cache_alloc+0x16b/0x370 [ 31.176589] vm_area_dup+0x20/0x160 [ 31.177070] __split_vma+0x170/0x950 [ 31.177642] split_vma+0xc6/0x110 [ 31.178183] mprotect_fixup+0x8d2/0xb30 [ 31.178794] do_mprotect_pkey+0x87e/0xd40 [ 31.179449] __x64_sys_mprotect+0x78/0xc0 [ 31.180090] do_syscall_64+0x3f/0x90 [ 31.180610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181224] [ 31.181435] Freed by task 19: [ 31.181800] kasan_save_stack+0x22/0x50 [ 31.182278] kasan_set_track+0x25/0x30 [ 31.182750] kasan_save_free_info+0x2b/0x50 [ 31.183268] __kasan_slab_free+0x10a/0x190 [ 31.183769] kmem_cache_free+0x10d/0x4d0 [ 31.184255] rcu_core+0x8c8/0x2860 [ 31.184678] __do_softirq+0x1b7/0x7d4 [ 31.185129] [ 31.185334] Last potentially related work creation: [ 31.185882] kasan_save_stack+0x22/0x50 [ 31.186359] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187515] remove_vma+0x139/0x170 [ 31.187947] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188475] do_vmi_munmap+0x1f1/0x2b0 [ 31.188930] __vm_munmap+0x138/0x3a0 [ 31.189370] __x64_sys_munmap+0x59/0x80 [ 31.189835] do_syscall_64+0x3f/0x90 [ 31.190289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190924] [ 31.191135] The buggy address belongs to the object at ffff88800eb9c658 [ 31.191135] which belongs to the cache vm_area_struct of size 168 [ 31.192600] The buggy address is located 88 bytes inside of [ 31.192600] freed 168-byte region [ffff88800eb9c658, ffff88800eb9c700) [ 31.194008] [ 31.194227] The buggy address belongs to the physical page: [ 31.194884] page:0000000087355c58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb9c [ 31.195966] memcg:ffff888019cdca01 [ 31.196389] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.197020] page_type: 0xffffffff() [ 31.197466] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.198382] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cdca01 [ 31.199302] page dumped because: kasan: bad access detected [ 31.199944] [ 31.200161] Memory state around the buggy address: [ 31.200739] ffff88800eb9c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.201588] ffff88800eb9c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.202432] >ffff88800eb9c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.203273] ^ [ 31.203847] ffff88800eb9c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.204694] ffff88800eb9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.205537] ================================================================== [ 31.206507] Disabling lock debugging due to kernel taint [ 34.007158] BUG: Bad rss-counter state mm:00000000854debfb type:MM_FILEPAGES val:33 [ 34.008783] BUG: Bad rss-counter state mm:00000000854debfb type:MM_ANONPAGES val:22 [ 34.483069] BUG: Bad rss-counter state mm:00000000cc14040a type:MM_FILEPAGES val:33 [ 34.484774] BUG: Bad rss-counter state mm:00000000cc14040a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35458' (ECDSA) to the list of known hosts. 2023/06/21 06:58:47 fuzzer started 2023/06/21 06:58:47 dialing manager at localhost:36067 2023/06/21 06:58:47 checking machine... 2023/06/21 06:58:47 checking revisions... [ 35.222202] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:58:47 testing simple program... [ 35.270407] cgroup: Unknown subsys name 'net' [ 35.348238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:58:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fb50c0049a0 RCX=0000556110360500 RDX=0000000000000000 RSI=0000556110328b4e RDI=000055611033c5ac RBP=00007fb50c0049a0 RSP=00007fb5137ad6e0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=00007fb50c0049b8 R13=00007fb50c0049a0 R14=0000556110363ec0 R15=0000000000000000 RIP=0000556110300d92 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb5137ae700 00000000 00000000 GS =0000 0000000000000000 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=00007fb41771daa0 CR3=000000000f6be000 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=2037343a38353a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a38353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa53d8 RCX=ffffffff8363e260 RDX=0000000000000000 RSI=ffffffff863b3c26 RDI=ffffffff85fa53d8 RBP=ffffffff85fa53d8 RSP=ffff88800ebd7758 R8 =ffffffff863b3c26 R9 =ffff88800ebd7850 R10=0000000000038001 R11=000000000008aa85 R12=ffffffff85fa53d8 R13=ffffffff85fa53d8 R14=ffffffff85fa53d8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007f28bf4d9900 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=00007f28bfa90618 CR3=0000000016f9e000 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