syzkaller login: [ 60.125090] BUG: Bad rss-counter state mm:00000000fcd06fc9 type:MM_FILEPAGES val:33 [ 60.126078] BUG: Bad rss-counter state mm:00000000fcd06fc9 type:MM_ANONPAGES val:22 [ 60.283765] ================================================================== [ 60.284704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.285673] Read of size 8 at addr ffff888019bf4228 by task sshd/228 [ 60.286626] [ 60.286877] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.287750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.288740] Call Trace: [ 60.289094] [ 60.289383] dump_stack_lvl+0x91/0xf0 [ 60.289875] print_report+0xcc/0x620 [ 60.290374] ? __virt_addr_valid+0x102/0x340 [ 60.290923] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.291544] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.292168] kasan_report+0xbe/0xf0 [ 60.292651] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.293281] vma_interval_tree_remove+0xc75/0xec0 [ 60.293891] vma_prepare+0xc54/0x11a0 [ 60.294371] __split_vma+0x5af/0x950 [ 60.294841] ? __pfx___split_vma+0x10/0x10 [ 60.295370] ? find_held_lock+0x2c/0x110 [ 60.295894] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.296461] ? lock_is_held_type+0x9f/0x120 [ 60.297024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.297631] ? mtree_range_walk+0x632/0x900 [ 60.298184] ? mas_walk+0x5c7/0x7c0 [ 60.298655] do_vmi_munmap+0x1f1/0x2b0 [ 60.299166] mmap_region+0x1f9/0x2660 [ 60.299651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.300174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.300903] ? __pfx_lock_acquire+0x10/0x10 [ 60.301471] ? __pfx_mmap_region+0x10/0x10 [ 60.302014] ? security_mmap_addr+0x7d/0xa0 [ 60.302555] ? get_unmapped_area+0x1f5/0x3f0 [ 60.303105] do_mmap+0x854/0xf00 [ 60.303550] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.304047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.304621] ksys_mmap_pgoff+0x3af/0x500 [ 60.305156] do_syscall_64+0x3f/0x90 [ 60.305637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.306286] RIP: 0033:0x7fc110d4ed82 [ 60.306751] 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 [ 60.308872] RSP: 002b:00007ffd0fbf3dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.309784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc110d4ed82 [ 60.310644] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc110188000 [ 60.311481] RBP: 00007fc110188000 R08: 0000000000000009 R09: 0000000000001000 [ 60.312331] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd5546cec0 [ 60.313193] R13: 00007ffd0fbf3df0 R14: 00007ffd0fbf3e20 R15: 00007ffd0fbf4180 [ 60.314039] [ 60.314339] [ 60.314561] Allocated by task 221: [ 60.314991] kasan_save_stack+0x22/0x50 [ 60.315496] kasan_set_track+0x25/0x30 [ 60.315989] __kasan_slab_alloc+0x59/0x70 [ 60.316529] kmem_cache_alloc+0x16b/0x370 [ 60.317075] vm_area_dup+0x20/0x160 [ 60.317537] __split_vma+0x170/0x950 [ 60.318008] split_vma+0xc6/0x110 [ 60.318452] mprotect_fixup+0x8d2/0xb30 [ 60.318961] do_mprotect_pkey+0x87e/0xd40 [ 60.319487] __x64_sys_mprotect+0x78/0xc0 [ 60.320012] do_syscall_64+0x3f/0x90 [ 60.320487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.321143] [ 60.321359] Freed by task 204: [ 60.321756] kasan_save_stack+0x22/0x50 [ 60.322259] kasan_set_track+0x25/0x30 [ 60.322751] kasan_save_free_info+0x2b/0x50 [ 60.323282] __kasan_slab_free+0x10a/0x190 [ 60.323814] kmem_cache_free+0x10d/0x4d0 [ 60.324327] rcu_core+0x8c8/0x2860 [ 60.324770] __do_softirq+0x1b7/0x7d4 [ 60.325270] [ 60.325483] Last potentially related work creation: [ 60.326074] kasan_save_stack+0x22/0x50 [ 60.326578] __kasan_record_aux_stack+0x8e/0xa0 [ 60.327155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.327897] remove_vma+0x139/0x170 [ 60.328356] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.328913] do_vmi_munmap+0x1f1/0x2b0 [ 60.329409] __vm_munmap+0x138/0x3a0 [ 60.329880] __x64_sys_munmap+0x59/0x80 [ 60.330382] do_syscall_64+0x3f/0x90 [ 60.330866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.331526] [ 60.331744] The buggy address belongs to the object at ffff888019bf41d0 [ 60.331744] which belongs to the cache vm_area_struct of size 168 [ 60.333216] The buggy address is located 88 bytes inside of [ 60.333216] freed 168-byte region [ffff888019bf41d0, ffff888019bf4278) [ 60.334607] [ 60.334824] The buggy address belongs to the physical page: [ 60.335481] page:00000000dffa63dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bf4 [ 60.336573] memcg:ffff88801a00c701 [ 60.337027] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.337678] page_type: 0xffffffff() [ 60.338128] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.339039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a00c701 [ 60.339953] page dumped because: kasan: bad access detected [ 60.340617] [ 60.340834] Memory state around the buggy address: [ 60.341420] ffff888019bf4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.342276] ffff888019bf4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.343124] >ffff888019bf4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.343970] ^ [ 60.344524] ffff888019bf4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.345388] ffff888019bf4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.346243] ================================================================== [ 60.347171] Disabling lock debugging due to kernel taint [ 62.595005] BUG: Bad rss-counter state mm:00000000bd956e02 type:MM_FILEPAGES val:33 [ 62.596636] BUG: Bad rss-counter state mm:00000000bd956e02 type:MM_ANONPAGES val:22 [ 62.980360] BUG: Bad rss-counter state mm:00000000eff0bfff type:MM_FILEPAGES val:33 [ 62.981136] BUG: Bad rss-counter state mm:00000000eff0bfff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8475' (ECDSA) to the list of known hosts. 2023/06/20 13:35:51 fuzzer started 2023/06/20 13:35:52 dialing manager at localhost:36067 2023/06/20 13:35:52 checking machine... 2023/06/20 13:35:52 checking revisions... [ 63.651464] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:35:52 testing simple program... [ 63.700764] cgroup: Unknown subsys name 'net' [ 63.771539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:51 Registers: info registers vcpu 0 RAX=1ffffffff0bc04ae RBX=ffffffff85e02570 RCX=ffffffff8184725b RDX=0000000000000000 RSI=ffffffff8613f678 RDI=ffffffff85e02564 RBP=ffffffff85e02564 RSP=ffff8880146cf820 R8 =ffffffff8613f678 R9 =ffff8880146cf918 R10=0000000000038001 R11=0000000000021ee8 R12=ffffffff85e02580 R13=ffffffff85e02564 R14=ffffffff85e02564 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f7bf8af2900 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=00007f7bf7f757b0 CR3=000000000d5e8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b196572c97a3237e00000000000ae988 XMM05=d8c6c95240473b100000000000132308 XMM06=94aac670ef06ff650000000000130d88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff8880147fd5b4 RBP=0000000000000000 RSP=ffff88806cf09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800fcd6080 RIP=ffffffff814c0871 RFL=00000293 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f45e5fd4900 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=00007ffd2ae56000 CR3=000000000ee1c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000