syzkaller login: [ 31.103142] BUG: Bad rss-counter state mm:0000000069e27644 type:MM_FILEPAGES val:33 [ 31.104633] BUG: Bad rss-counter state mm:0000000069e27644 type:MM_ANONPAGES val:22 [ 31.266918] ================================================================== [ 31.267839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.268793] Read of size 8 at addr ffff888018027058 by task sshd/221 [ 31.269585] [ 31.269818] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.270796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271796] Call Trace: [ 31.272145] [ 31.272436] dump_stack_lvl+0x91/0xf0 [ 31.272936] print_report+0xcc/0x620 [ 31.273437] ? __virt_addr_valid+0x102/0x340 [ 31.274009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275266] kasan_report+0xbe/0xf0 [ 31.275746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.276376] vma_interval_tree_remove+0xc75/0xec0 [ 31.276994] vma_prepare+0xc54/0x11a0 [ 31.277481] __split_vma+0x5af/0x950 [ 31.277964] ? __pfx___split_vma+0x10/0x10 [ 31.278507] ? find_held_lock+0x2c/0x110 [ 31.279035] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.279612] ? lock_is_held_type+0x9f/0x120 [ 31.280156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.280771] ? mtree_range_walk+0x632/0x900 [ 31.281327] ? mas_walk+0x5c7/0x7c0 [ 31.281830] do_vmi_munmap+0x1f1/0x2b0 [ 31.282351] mmap_region+0x1f9/0x2660 [ 31.282838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.283351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.284073] ? __pfx_lock_acquire+0x10/0x10 [ 31.284604] ? __pfx_mmap_region+0x10/0x10 [ 31.285154] ? security_mmap_addr+0x7d/0xa0 [ 31.285704] ? get_unmapped_area+0x1f5/0x3f0 [ 31.286260] do_mmap+0x854/0xf00 [ 31.286710] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.287209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.287778] ksys_mmap_pgoff+0x3af/0x500 [ 31.288288] do_syscall_64+0x3f/0x90 [ 31.288769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289442] RIP: 0033:0x7f68c7a25d82 [ 31.289904] 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 [ 31.292034] RSP: 002b:00007ffd60072698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.292942] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68c7a25d82 [ 31.293811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68c6e5f000 [ 31.294674] RBP: 00007f68c6e5f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.295526] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f442d48ec0 [ 31.296385] R13: 00007ffd600726b0 R14: 00007ffd600726e0 R15: 00007ffd60072a40 [ 31.297239] [ 31.297549] [ 31.297767] Allocated by task 214: [ 31.298205] kasan_save_stack+0x22/0x50 [ 31.298714] kasan_set_track+0x25/0x30 [ 31.299216] __kasan_slab_alloc+0x59/0x70 [ 31.299744] kmem_cache_alloc+0x16b/0x370 [ 31.300264] vm_area_dup+0x20/0x160 [ 31.300720] __split_vma+0x170/0x950 [ 31.301195] split_vma+0xc6/0x110 [ 31.301643] mprotect_fixup+0x8d2/0xb30 [ 31.302147] do_mprotect_pkey+0x87e/0xd40 [ 31.302675] __x64_sys_mprotect+0x78/0xc0 [ 31.303205] do_syscall_64+0x3f/0x90 [ 31.303693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304350] [ 31.304566] Freed by task 214: [ 31.304960] kasan_save_stack+0x22/0x50 [ 31.305474] kasan_set_track+0x25/0x30 [ 31.305985] kasan_save_free_info+0x2b/0x50 [ 31.306529] __kasan_slab_free+0x10a/0x190 [ 31.307071] kmem_cache_free+0x10d/0x4d0 [ 31.307586] rcu_core+0x8c8/0x2860 [ 31.308041] __do_softirq+0x1b7/0x7d4 [ 31.308524] [ 31.308740] Last potentially related work creation: [ 31.309338] kasan_save_stack+0x22/0x50 [ 31.309895] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.311180] remove_vma+0x139/0x170 [ 31.311662] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.312253] do_vmi_munmap+0x1f1/0x2b0 [ 31.312772] __vm_munmap+0x138/0x3a0 [ 31.313258] __x64_sys_munmap+0x59/0x80 [ 31.313827] do_syscall_64+0x3f/0x90 [ 31.314330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315007] [ 31.315235] The buggy address belongs to the object at ffff888018027000 [ 31.315235] which belongs to the cache vm_area_struct of size 168 [ 31.316809] The buggy address is located 88 bytes inside of [ 31.316809] freed 168-byte region [ffff888018027000, ffff8880180270a8) [ 31.318351] [ 31.318583] The buggy address belongs to the physical page: [ 31.319290] page:00000000caf45c8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18027 [ 31.320472] memcg:ffff88800dcfe601 [ 31.320925] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321616] page_type: 0xffffffff() [ 31.322092] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ca80 dead000000000002 [ 31.323071] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcfe601 [ 31.324027] page dumped because: kasan: bad access detected [ 31.324725] [ 31.324951] Memory state around the buggy address: [ 31.325560] ffff888018026f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.326458] ffff888018026f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.327360] >ffff888018027000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328251] ^ [ 31.329026] ffff888018027080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.329946] ffff888018027100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.330837] ================================================================== [ 31.331847] Disabling lock debugging due to kernel taint [ 34.456140] BUG: Bad rss-counter state mm:0000000042924eab type:MM_FILEPAGES val:33 [ 34.457475] BUG: Bad rss-counter state mm:0000000042924eab type:MM_ANONPAGES val:22 [ 34.822882] BUG: Bad rss-counter state mm:00000000b139fe03 type:MM_FILEPAGES val:33 [ 34.824070] BUG: Bad rss-counter state mm:00000000b139fe03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15821' (ECDSA) to the list of known hosts. 2023/06/20 18:31:51 fuzzer started 2023/06/20 18:31:52 dialing manager at localhost:36067 2023/06/20 18:31:52 checking machine... 2023/06/20 18:31:52 checking revisions... [ 35.530834] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:31:52 testing simple program... [ 35.578342] cgroup: Unknown subsys name 'net' [ 35.627337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000053 RCX=0000000000000000 RDX=ffff88800cff1b40 RSI=ffffffff8184ceca RDI=ffff88800cc6ac00 RBP=ffff88800cc6ac53 RSP=ffff88801458f8b0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800cc6ac00 R13=0000000000000000 R14=0000000000000000 R15=0000000000000053 RIP=ffffffff8176c2a8 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 00007f8c0da3d900 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=00007f4391d2a650 CR3=0000000009c66000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0a1396f0e4b37d0600000000000ae988 XMM05=8eb70771904c94be0000000000133198 XMM06=c291bd5c70af25b90000000000131f88 XMM07=fb795ef6d65770560000000000122220 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016b68000 RSI=ffffffff81143193 RDI=0000000000000007 RBP=0000000018cd0ec0 RSP=ffff88800fd2f840 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000080000 R14=0000000000000000 R15=ffff88800db44500 RIP=ffffffff814c0864 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 00007f4391775900 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=00007f4391d2c618 CR3=000000000e7fe000 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=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