syzkaller login: [ 30.671099] BUG: Bad rss-counter state mm:000000002bffa2bb type:MM_FILEPAGES val:33 [ 30.672556] BUG: Bad rss-counter state mm:000000002bffa2bb type:MM_ANONPAGES val:22 [ 30.819480] ================================================================== [ 30.820620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.821862] Read of size 8 at addr ffff888009bb2ed8 by task sshd/221 [ 30.822724] [ 30.822962] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.823850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.824827] Call Trace: [ 30.825147] [ 30.825435] dump_stack_lvl+0x91/0xf0 [ 30.825934] print_report+0xcc/0x620 [ 30.826429] ? __virt_addr_valid+0x102/0x340 [ 30.826998] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827622] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828234] kasan_report+0xbe/0xf0 [ 30.828706] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829321] vma_interval_tree_remove+0xc75/0xec0 [ 30.829924] vma_prepare+0xc54/0x11a0 [ 30.830400] __split_vma+0x5af/0x950 [ 30.830872] ? __pfx___split_vma+0x10/0x10 [ 30.831450] ? find_held_lock+0x2c/0x110 [ 30.831990] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.832558] ? lock_is_held_type+0x9f/0x120 [ 30.833102] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.833703] ? mtree_range_walk+0x632/0x900 [ 30.834260] ? mas_walk+0x5c7/0x7c0 [ 30.834734] do_vmi_munmap+0x1f1/0x2b0 [ 30.835239] mmap_region+0x1f9/0x2660 [ 30.835720] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.836238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.836953] ? __pfx_lock_acquire+0x10/0x10 [ 30.837485] ? __pfx_mmap_region+0x10/0x10 [ 30.838014] ? security_mmap_addr+0x7d/0xa0 [ 30.838544] ? get_unmapped_area+0x1f5/0x3f0 [ 30.839115] do_mmap+0x854/0xf00 [ 30.839554] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.840052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.840652] ksys_mmap_pgoff+0x3af/0x500 [ 30.841168] do_syscall_64+0x3f/0x90 [ 30.841657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842311] RIP: 0033:0x7f74a1f9fd82 [ 30.842776] 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 [ 30.844911] RSP: 002b:00007ffd416a4508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.845835] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74a1f9fd82 [ 30.846691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74a13d9000 [ 30.847542] RBP: 00007f74a13d9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.848389] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556874d6eec0 [ 30.849226] R13: 00007ffd416a4520 R14: 00007ffd416a4550 R15: 00007ffd416a48b0 [ 30.850110] [ 30.850400] [ 30.850613] Allocated by task 214: [ 30.851065] kasan_save_stack+0x22/0x50 [ 30.851576] kasan_set_track+0x25/0x30 [ 30.852074] __kasan_slab_alloc+0x59/0x70 [ 30.852601] kmem_cache_alloc+0x16b/0x370 [ 30.853119] vm_area_dup+0x20/0x160 [ 30.853576] __split_vma+0x170/0x950 [ 30.854053] split_vma+0xc6/0x110 [ 30.854507] mprotect_fixup+0x8d2/0xb30 [ 30.855019] do_mprotect_pkey+0x87e/0xd40 [ 30.855548] __x64_sys_mprotect+0x78/0xc0 [ 30.856097] do_syscall_64+0x3f/0x90 [ 30.856578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857229] [ 30.857450] Freed by task 214: [ 30.857836] kasan_save_stack+0x22/0x50 [ 30.858337] kasan_set_track+0x25/0x30 [ 30.858836] kasan_save_free_info+0x2b/0x50 [ 30.859392] __kasan_slab_free+0x10a/0x190 [ 30.859923] kmem_cache_free+0x10d/0x4d0 [ 30.860435] rcu_core+0x8c8/0x2860 [ 30.860886] __do_softirq+0x1b7/0x7d4 [ 30.861369] [ 30.861588] Last potentially related work creation: [ 30.862174] kasan_save_stack+0x22/0x50 [ 30.862698] __kasan_record_aux_stack+0x8e/0xa0 [ 30.863319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.863984] remove_vma+0x139/0x170 [ 30.864448] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865024] do_vmi_munmap+0x1f1/0x2b0 [ 30.865545] __vm_munmap+0x138/0x3a0 [ 30.866030] __x64_sys_munmap+0x59/0x80 [ 30.866531] do_syscall_64+0x3f/0x90 [ 30.867032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867708] [ 30.867923] The buggy address belongs to the object at ffff888009bb2e80 [ 30.867923] which belongs to the cache vm_area_struct of size 168 [ 30.869315] The buggy address is located 88 bytes inside of [ 30.869315] freed 168-byte region [ffff888009bb2e80, ffff888009bb2f28) [ 30.870632] [ 30.870839] The buggy address belongs to the physical page: [ 30.871515] page:000000009f2dbb9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bb2 [ 30.872683] memcg:ffff88800e949c01 [ 30.873115] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.873760] page_type: 0xffffffff() [ 30.874210] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.875191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e949c01 [ 30.876108] page dumped because: kasan: bad access detected [ 30.876773] [ 30.876990] Memory state around the buggy address: [ 30.877575] ffff888009bb2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.878437] ffff888009bb2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.879309] >ffff888009bb2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.880163] ^ [ 30.880892] ffff888009bb2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.881753] ffff888009bb2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.882603] ================================================================== [ 30.884052] Disabling lock debugging due to kernel taint [ 33.100995] BUG: Bad rss-counter state mm:00000000cfedc1eb type:MM_FILEPAGES val:33 [ 33.101968] BUG: Bad rss-counter state mm:00000000cfedc1eb type:MM_ANONPAGES val:22 [ 33.566768] BUG: Bad rss-counter state mm:00000000116afffb type:MM_FILEPAGES val:33 [ 33.567768] BUG: Bad rss-counter state mm:00000000116afffb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2986' (ECDSA) to the list of known hosts. 2023/06/21 06:59:33 fuzzer started 2023/06/21 06:59:33 dialing manager at localhost:36067 2023/06/21 06:59:33 checking machine... 2023/06/21 06:59:33 checking revisions... [ 34.301861] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:59:33 testing simple program... [ 34.351421] cgroup: Unknown subsys name 'net' [ 34.393758] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000002b RCX=0000000000000000 RDX=ffff888016ad51c0 RSI=ffffffff81f58a4f RDI=ffff8880094389c0 RBP=ffff888009df5000 RSP=ffff888016ff7a90 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=0000000000000000 R12=ffff888009b080d8 R13=ffff888009438980 R14=0000000000000010 R15=dffffc0000000000 RIP=ffffffff81f58a5f RFL=00000212 [----A--] 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 00007f1b35ec6900 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=00007f1b3647d618 CR3=000000000dbc4000 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=dffffc0000000000 RBX=ffff8880102879a0 RCX=0000000000000001 RDX=1ffff11002050f45 RSI=ffffffff8180803b RDI=ffff8880102879ac RBP=ffff888010287a28 RSP=ffff8880102878b8 R8 =0000000000000001 R9 =ffff888010287918 R10=0000000000038001 R11=0000000000020de5 R12=ffff8880102879a0 R13=0000000000000000 R14=ffff888010223680 R15=0000000000092cc0 RIP=ffffffff813ad543 RFL=00000212 [----A--] 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 00007f2c37f16900 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=00007f2c37307170 CR3=000000000c6ce000 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=ee13ce92e265da1700000000000ae988 XMM05=6bf8ad3dd6157e0f0000000000132f60 XMM06=e4cb8bb95a7664b60000000000131df8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000