syzkaller login: [ 31.140786] BUG: Bad rss-counter state mm:000000001f604230 type:MM_FILEPAGES val:33 [ 31.141994] BUG: Bad rss-counter state mm:000000001f604230 type:MM_ANONPAGES val:22 [ 31.178156] ================================================================== [ 31.179265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.180203] Read of size 8 at addr ffff88801652c968 by task sshd/219 [ 31.180971] [ 31.181190] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.182050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.183043] Call Trace: [ 31.183369] [ 31.183654] dump_stack_lvl+0x91/0xf0 [ 31.184144] print_report+0xcc/0x620 [ 31.184625] ? __virt_addr_valid+0x102/0x340 [ 31.185175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186415] kasan_report+0xbe/0xf0 [ 31.186898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187521] vma_interval_tree_remove+0xc75/0xec0 [ 31.188133] vma_prepare+0xc54/0x11a0 [ 31.188613] __split_vma+0x5af/0x950 [ 31.189088] ? __pfx___split_vma+0x10/0x10 [ 31.189617] ? find_held_lock+0x2c/0x110 [ 31.190135] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.190699] ? lock_is_held_type+0x9f/0x120 [ 31.191265] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191882] ? mtree_range_walk+0x632/0x900 [ 31.192448] ? mas_walk+0x5c7/0x7c0 [ 31.192923] do_vmi_munmap+0x1f1/0x2b0 [ 31.193418] mmap_region+0x1f9/0x2660 [ 31.193899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.194414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.195132] ? __pfx_lock_acquire+0x10/0x10 [ 31.195673] ? __pfx_mmap_region+0x10/0x10 [ 31.196207] ? security_mmap_addr+0x7d/0xa0 [ 31.196743] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197293] do_mmap+0x854/0xf00 [ 31.197732] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.198810] ksys_mmap_pgoff+0x3af/0x500 [ 31.199325] do_syscall_64+0x3f/0x90 [ 31.199808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200456] RIP: 0033:0x7f3540860d82 [ 31.200916] 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 [ 31.203073] RSP: 002b:00007ffc09e392a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.203980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3540860d82 [ 31.204825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f353fc9a000 [ 31.205682] RBP: 00007f353fc9a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.206624] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590dde11ec0 [ 31.207596] R13: 00007ffc09e392c0 R14: 00007ffc09e392f0 R15: 00007ffc09e39650 [ 31.208459] [ 31.208755] [ 31.208997] Allocated by task 212: [ 31.209427] kasan_save_stack+0x22/0x50 [ 31.209938] kasan_set_track+0x25/0x30 [ 31.210431] __kasan_slab_alloc+0x59/0x70 [ 31.210966] kmem_cache_alloc+0x16b/0x370 [ 31.211486] vm_area_dup+0x20/0x160 [ 31.211940] __split_vma+0x170/0x950 [ 31.212404] split_vma+0xc6/0x110 [ 31.212848] mprotect_fixup+0x8d2/0xb30 [ 31.213349] do_mprotect_pkey+0x87e/0xd40 [ 31.213876] __x64_sys_mprotect+0x78/0xc0 [ 31.214395] do_syscall_64+0x3f/0x90 [ 31.214881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215519] [ 31.215734] Freed by task 212: [ 31.216127] kasan_save_stack+0x22/0x50 [ 31.216640] kasan_set_track+0x25/0x30 [ 31.217138] kasan_save_free_info+0x2b/0x50 [ 31.217671] __kasan_slab_free+0x10a/0x190 [ 31.218208] kmem_cache_free+0x10d/0x4d0 [ 31.218715] rcu_core+0x8c8/0x2860 [ 31.219177] __do_softirq+0x1b7/0x7d4 [ 31.219656] [ 31.219871] Last potentially related work creation: [ 31.220466] kasan_save_stack+0x22/0x50 [ 31.220969] __kasan_record_aux_stack+0x8e/0xa0 [ 31.221545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.222184] remove_vma+0x139/0x170 [ 31.222636] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.223205] do_vmi_munmap+0x1f1/0x2b0 [ 31.223697] __vm_munmap+0x138/0x3a0 [ 31.224195] __x64_sys_munmap+0x59/0x80 [ 31.224698] do_syscall_64+0x3f/0x90 [ 31.225172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225816] [ 31.226030] The buggy address belongs to the object at ffff88801652c910 [ 31.226030] which belongs to the cache vm_area_struct of size 168 [ 31.227546] The buggy address is located 88 bytes inside of [ 31.227546] freed 168-byte region [ffff88801652c910, ffff88801652c9b8) [ 31.228995] [ 31.229212] The buggy address belongs to the physical page: [ 31.229870] page:0000000010cbe3c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1652c [ 31.230974] memcg:ffff888016525101 [ 31.231406] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232148] page_type: 0xffffffff() [ 31.232598] raw: 0100000000000200 ffff8880087a0c80 ffffea00006392c0 dead000000000009 [ 31.233517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016525101 [ 31.234422] page dumped because: kasan: bad access detected [ 31.235118] [ 31.235334] Memory state around the buggy address: [ 31.235938] ffff88801652c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.236879] ffff88801652c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.237795] >ffff88801652c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.238647] ^ [ 31.239446] ffff88801652c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.240335] ffff88801652ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.241184] ================================================================== [ 31.242158] Disabling lock debugging due to kernel taint [ 33.458380] BUG: Bad rss-counter state mm:0000000033530fb5 type:MM_FILEPAGES val:33 [ 33.459488] BUG: Bad rss-counter state mm:0000000033530fb5 type:MM_ANONPAGES val:22 [ 34.025146] BUG: Bad rss-counter state mm:00000000152e43bf type:MM_FILEPAGES val:32 [ 34.026306] BUG: Bad rss-counter state mm:00000000152e43bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10408' (ECDSA) to the list of known hosts. 2023/06/20 12:07:17 fuzzer started 2023/06/20 12:07:17 dialing manager at localhost:36067 2023/06/20 12:07:17 checking machine... 2023/06/20 12:07:17 checking revisions... [ 34.664918] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:07:17 testing simple program... [ 34.706586] cgroup: Unknown subsys name 'net' [ 34.769006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:07:17 Registers: info registers vcpu 0 RAX=ffff88800dc18ec0 RBX=ffff88800dc18b80 RCX=0000000000111cc0 RDX=0000000000111c80 RSI=0000000000000dc0 RDI=0000000000111c80 RBP=ffff88801ca5fca8 RSP=ffff88801ca5fc60 R8 =ffff88800dc18ec0 R9 =0000000000040940 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b23c0 R13=0000000000000000 R14=0000000000000000 R15=ffffffff81ef1138 RIP=ffffffff81807fd7 RFL=000002c6 [--SZ-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 00007fd2ae023900 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=00007fd2ae5db0b0 CR3=00000000090a4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc7102 RBX=ffffffff85e38814 RCX=ffffffff81c63c8b RDX=0000000000000000 RSI=ffffffff86190a80 RDI=ffffffff85e38814 RBP=ffffffff85e38814 RSP=ffff8880147573c8 R8 =ffffffff86190a80 R9 =ffff8880147574c0 R10=0000000000038001 R11=000000000002f794 R12=ffffffff85e38814 R13=ffffffff85e38814 R14=ffffffff85e38814 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f47b1ce5900 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=00007f47b1122060 CR3=000000000b32a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6f8797b71dcfd15c00000000000ae988 XMM05=5a2c6e7133b868ce0000000000132c00 XMM06=dfcdbad4f1609c370000000000131a98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000