syzkaller login: [ 38.832938] BUG: Bad rss-counter state mm:00000000f3cc50bf type:MM_FILEPAGES val:33 [ 38.834065] BUG: Bad rss-counter state mm:00000000f3cc50bf type:MM_ANONPAGES val:22 [ 38.879138] ================================================================== [ 38.880077] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881225] Read of size 8 at addr ffff88800c64e228 by task sshd/219 [ 38.882025] [ 38.882407] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884501] Call Trace: [ 38.884896] [ 38.885237] dump_stack_lvl+0x91/0xf0 [ 38.885836] print_report+0xcc/0x620 [ 38.886402] ? __virt_addr_valid+0x102/0x340 [ 38.887030] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887662] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888311] kasan_report+0xbe/0xf0 [ 38.888819] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889444] vma_interval_tree_remove+0xc75/0xec0 [ 38.890046] vma_prepare+0xc54/0x11a0 [ 38.890530] __split_vma+0x5af/0x950 [ 38.891017] ? __pfx___split_vma+0x10/0x10 [ 38.891592] ? find_held_lock+0x2c/0x110 [ 38.892119] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892682] ? lock_is_held_type+0x9f/0x120 [ 38.893228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893834] ? mtree_range_walk+0x632/0x900 [ 38.894406] ? mas_walk+0x5c7/0x7c0 [ 38.894881] do_vmi_munmap+0x1f1/0x2b0 [ 38.895389] mmap_region+0x1f9/0x2660 [ 38.895879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897104] ? __pfx_lock_acquire+0x10/0x10 [ 38.897641] ? __pfx_mmap_region+0x10/0x10 [ 38.898181] ? security_mmap_addr+0x7d/0xa0 [ 38.898716] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899308] do_mmap+0x854/0xf00 [ 38.899767] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900835] ksys_mmap_pgoff+0x3af/0x500 [ 38.901362] do_syscall_64+0x3f/0x90 [ 38.901866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902537] RIP: 0033:0x7fa27b5a9d82 [ 38.902996] 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 [ 38.905157] RSP: 002b:00007fffec5688d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa27b5a9d82 [ 38.907028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa27a9e3000 [ 38.907897] RBP: 00007fa27a9e3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908791] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efb3289b20 [ 38.909645] R13: 00007fffec5688f0 R14: 00007fffec568920 R15: 00007fffec568c80 [ 38.910512] [ 38.910811] [ 38.911027] Allocated by task 212: [ 38.911486] kasan_save_stack+0x22/0x50 [ 38.911997] kasan_set_track+0x25/0x30 [ 38.912492] __kasan_slab_alloc+0x59/0x70 [ 38.913031] kmem_cache_alloc+0x16b/0x370 [ 38.913557] vm_area_dup+0x20/0x160 [ 38.914028] __split_vma+0x170/0x950 [ 38.914510] split_vma+0xc6/0x110 [ 38.914963] mprotect_fixup+0x8d2/0xb30 [ 38.915492] do_mprotect_pkey+0x87e/0xd40 [ 38.916023] __x64_sys_mprotect+0x78/0xc0 [ 38.916547] do_syscall_64+0x3f/0x90 [ 38.917026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917681] [ 38.917905] Freed by task 212: [ 38.918301] kasan_save_stack+0x22/0x50 [ 38.918808] kasan_set_track+0x25/0x30 [ 38.919325] kasan_save_free_info+0x2b/0x50 [ 38.919861] __kasan_slab_free+0x10a/0x190 [ 38.920403] kmem_cache_free+0x10d/0x4d0 [ 38.920917] rcu_core+0x8c8/0x2860 [ 38.921367] __do_softirq+0x1b7/0x7d4 [ 38.921859] [ 38.922074] Last potentially related work creation: [ 38.922672] kasan_save_stack+0x22/0x50 [ 38.923203] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924547] remove_vma+0x139/0x170 [ 38.924997] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925586] do_vmi_munmap+0x1f1/0x2b0 [ 38.926099] __vm_munmap+0x138/0x3a0 [ 38.926575] __x64_sys_munmap+0x59/0x80 [ 38.927072] do_syscall_64+0x3f/0x90 [ 38.927575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928223] [ 38.928441] The buggy address belongs to the object at ffff88800c64e1d0 [ 38.928441] which belongs to the cache vm_area_struct of size 168 [ 38.929916] The buggy address is located 88 bytes inside of [ 38.929916] freed 168-byte region [ffff88800c64e1d0, ffff88800c64e278) [ 38.931345] [ 38.931565] The buggy address belongs to the physical page: [ 38.932222] page:00000000c65e188a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc64e [ 38.933303] memcg:ffff88800f6df701 [ 38.933752] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.934491] page_type: 0xffffffff() [ 38.934973] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382ac0 dead000000000005 [ 38.935914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6df701 [ 38.936846] page dumped because: kasan: bad access detected [ 38.937548] [ 38.937764] Memory state around the buggy address: [ 38.938341] ffff88800c64e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.939195] ffff88800c64e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.940061] >ffff88800c64e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.940915] ^ [ 38.941475] ffff88800c64e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.942360] ffff88800c64e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.943224] ================================================================== [ 38.944187] Disabling lock debugging due to kernel taint [ 41.654549] BUG: Bad rss-counter state mm:00000000098858ff type:MM_FILEPAGES val:33 [ 41.655722] BUG: Bad rss-counter state mm:00000000098858ff type:MM_ANONPAGES val:22 [ 42.232474] BUG: Bad rss-counter state mm:00000000192e39f9 type:MM_FILEPAGES val:33 [ 42.233887] BUG: Bad rss-counter state mm:00000000192e39f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13901' (ECDSA) to the list of known hosts. 2023/06/20 16:41:00 fuzzer started 2023/06/20 16:41:00 dialing manager at localhost:36067 2023/06/20 16:41:00 checking machine... 2023/06/20 16:41:00 checking revisions... [ 42.946409] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:41:00 testing simple program... [ 43.001500] cgroup: Unknown subsys name 'net' [ 43.043594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009a6f470 RCX=ffffffff83ab1913 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800c56f4f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c5300000c53 R12=0000000000000000 R13=000000000000008e R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0250 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 00007f741c8fa900 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=00007f741ceb1618 CR3=000000000d772000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000058 RCX=ffffffff844a4f03 RDX=ffff88800d643680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800c4bd458 RSP=ffff88801460fce0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=000000000000000b R13=000000000000000d R14=00007f6d4bf5c000 R15=00007f6d4c75bfff RIP=ffffffff814c0864 RFL=00000297 [--S-APC] 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 00007f6d4cb71900 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=00007f6d4bf9a780 CR3=000000000c6a0000 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=073cf482d41eb2e300000000000ae988 XMM05=9788ca83854866af0000000000132c10 XMM06=806171799158d9670000000000131690 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000