syzkaller login: [ 29.099151] BUG: Bad rss-counter state mm:00000000be5964bb type:MM_FILEPAGES val:33 [ 29.100617] BUG: Bad rss-counter state mm:00000000be5964bb type:MM_ANONPAGES val:22 [ 29.288849] ================================================================== [ 29.289839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.290839] Read of size 8 at addr ffff8880159f5ed8 by task sshd/220 [ 29.291771] [ 29.292012] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.292941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.294036] Call Trace: [ 29.294384] [ 29.294689] dump_stack_lvl+0x91/0xf0 [ 29.295214] print_report+0xcc/0x620 [ 29.295730] ? __virt_addr_valid+0x102/0x340 [ 29.296327] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.296990] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.297659] kasan_report+0xbe/0xf0 [ 29.298182] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.298871] vma_interval_tree_remove+0xc75/0xec0 [ 29.299528] vma_prepare+0xc54/0x11a0 [ 29.300062] __split_vma+0x5af/0x950 [ 29.300584] ? __pfx___split_vma+0x10/0x10 [ 29.301235] ? find_held_lock+0x2c/0x110 [ 29.301913] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.302659] ? lock_is_held_type+0x9f/0x120 [ 29.303377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.304171] ? mtree_range_walk+0x632/0x900 [ 29.304896] ? mas_walk+0x5c7/0x7c0 [ 29.305546] do_vmi_munmap+0x1f1/0x2b0 [ 29.306210] mmap_region+0x1f9/0x2660 [ 29.306845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.307526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.308466] ? __pfx_lock_acquire+0x10/0x10 [ 29.309186] ? __pfx_mmap_region+0x10/0x10 [ 29.309892] ? security_mmap_addr+0x7d/0xa0 [ 29.310610] ? get_unmapped_area+0x1f5/0x3f0 [ 29.311341] do_mmap+0x854/0xf00 [ 29.311910] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.312555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.313305] ksys_mmap_pgoff+0x3af/0x500 [ 29.313973] do_syscall_64+0x3f/0x90 [ 29.314608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.315463] RIP: 0033:0x7fa4b052bd82 [ 29.316067] 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 [ 29.318925] RSP: 002b:00007ffc2dd74c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.320111] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4b052bd82 [ 29.321241] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4af965000 [ 29.322393] RBP: 00007fa4af965000 R08: 0000000000000009 R09: 0000000000001000 [ 29.323514] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578fbdd1d90 [ 29.324650] R13: 00007ffc2dd74c30 R14: 00007ffc2dd74c60 R15: 00007ffc2dd74fc0 [ 29.325817] [ 29.326204] [ 29.326475] Allocated by task 213: [ 29.327034] kasan_save_stack+0x22/0x50 [ 29.327690] kasan_set_track+0x25/0x30 [ 29.328357] __kasan_slab_alloc+0x59/0x70 [ 29.329036] kmem_cache_alloc+0x16b/0x370 [ 29.329728] vm_area_dup+0x20/0x160 [ 29.330325] __split_vma+0x170/0x950 [ 29.330945] split_vma+0xc6/0x110 [ 29.331524] mprotect_fixup+0x8d2/0xb30 [ 29.332177] do_mprotect_pkey+0x87e/0xd40 [ 29.332854] __x64_sys_mprotect+0x78/0xc0 [ 29.333482] do_syscall_64+0x3f/0x90 [ 29.333963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.334611] [ 29.334835] Freed by task 213: [ 29.335230] kasan_save_stack+0x22/0x50 [ 29.335736] kasan_set_track+0x25/0x30 [ 29.336237] kasan_save_free_info+0x2b/0x50 [ 29.336772] __kasan_slab_free+0x10a/0x190 [ 29.337342] kmem_cache_free+0x10d/0x4d0 [ 29.337859] rcu_core+0x8c8/0x2860 [ 29.338307] __do_softirq+0x1b7/0x7d4 [ 29.338793] [ 29.339011] Last potentially related work creation: [ 29.339594] kasan_save_stack+0x22/0x50 [ 29.340104] __kasan_record_aux_stack+0x8e/0xa0 [ 29.340682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.341335] remove_vma+0x139/0x170 [ 29.341793] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.342353] do_vmi_munmap+0x1f1/0x2b0 [ 29.342845] __vm_munmap+0x138/0x3a0 [ 29.343317] __x64_sys_munmap+0x59/0x80 [ 29.343825] do_syscall_64+0x3f/0x90 [ 29.344319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.344996] [ 29.345229] The buggy address belongs to the object at ffff8880159f5e80 [ 29.345229] which belongs to the cache vm_area_struct of size 168 [ 29.346756] The buggy address is located 88 bytes inside of [ 29.346756] freed 168-byte region [ffff8880159f5e80, ffff8880159f5f28) [ 29.348206] [ 29.348434] The buggy address belongs to the physical page: [ 29.349124] page:000000005ac171f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159f5 [ 29.350293] memcg:ffff888014390901 [ 29.350737] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.351407] page_type: 0xffffffff() [ 29.351876] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.352830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014390901 [ 29.353776] page dumped because: kasan: bad access detected [ 29.354452] [ 29.354681] Memory state around the buggy address: [ 29.355288] ffff8880159f5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.356163] ffff8880159f5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.357032] >ffff8880159f5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.357930] ^ [ 29.358696] ffff8880159f5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.359578] ffff8880159f5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.360469] ================================================================== [ 29.361519] Disabling lock debugging due to kernel taint [ 31.299257] BUG: Bad rss-counter state mm:000000004d6ad13f type:MM_FILEPAGES val:33 [ 31.300329] BUG: Bad rss-counter state mm:000000004d6ad13f type:MM_ANONPAGES val:22 [ 31.879724] BUG: Bad rss-counter state mm:00000000daad27ef type:MM_FILEPAGES val:33 [ 31.880934] BUG: Bad rss-counter state mm:00000000daad27ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12726' (ECDSA) to the list of known hosts. 2023/06/21 01:17:42 fuzzer started 2023/06/21 01:17:42 dialing manager at localhost:36067 2023/06/21 01:17:43 checking machine... 2023/06/21 01:17:43 checking revisions... [ 32.493532] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:17:43 testing simple program... [ 32.531438] cgroup: Unknown subsys name 'net' [ 32.581694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:17:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888014357f60 RSI=ffff888014357f48 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888010361b40 R15=ffff88800d602540 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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 00007f61e0a2a900 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=00007f61dff48000 CR3=0000000010392000 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=663c106a0b68950500000000000ae988 XMM05=0eb6dea83ef474ed0000000000132ea0 XMM06=94af1a2221db508f0000000000131c40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff8180713d RSP=ffff888017c07b48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff8180f036 RFL=00000002 [-------] 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 00007f29ab0b3900 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=00007fff4937b000 CR3=000000000e96c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000