syzkaller login: [ 30.568720] BUG: Bad rss-counter state mm:000000003a3b9613 type:MM_FILEPAGES val:33 [ 30.570821] BUG: Bad rss-counter state mm:000000003a3b9613 type:MM_ANONPAGES val:22 [ 30.741650] ================================================================== [ 30.742608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.743591] Read of size 8 at addr ffff88801a26e310 by task sshd/221 [ 30.744531] [ 30.744759] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.745652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746681] Call Trace: [ 30.747014] [ 30.747307] dump_stack_lvl+0x91/0xf0 [ 30.747817] print_report+0xcc/0x620 [ 30.748330] ? __virt_addr_valid+0x102/0x340 [ 30.748893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750164] kasan_report+0xbe/0xf0 [ 30.750648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751287] vma_interval_tree_remove+0xc75/0xec0 [ 30.751931] vma_prepare+0xc54/0x11a0 [ 30.752421] __split_vma+0x5af/0x950 [ 30.752906] ? __pfx___split_vma+0x10/0x10 [ 30.753459] ? find_held_lock+0x2c/0x110 [ 30.753996] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754572] ? lock_is_held_type+0x9f/0x120 [ 30.755119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755766] ? mtree_range_walk+0x632/0x900 [ 30.756360] ? mas_walk+0x5c7/0x7c0 [ 30.756924] do_vmi_munmap+0x1f1/0x2b0 [ 30.757498] mmap_region+0x1f9/0x2660 [ 30.758063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758673] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.759517] ? __pfx_lock_acquire+0x10/0x10 [ 30.760151] ? __pfx_mmap_region+0x10/0x10 [ 30.760776] ? security_mmap_addr+0x7d/0xa0 [ 30.761403] ? get_unmapped_area+0x1f5/0x3f0 [ 30.762053] do_mmap+0x854/0xf00 [ 30.762571] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.763156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.763840] ksys_mmap_pgoff+0x3af/0x500 [ 30.764438] do_syscall_64+0x3f/0x90 [ 30.765002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765758] RIP: 0033:0x7f294abb0d82 [ 30.766300] 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 [ 30.768824] RSP: 002b:00007fff8e523d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.769877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f294abb0d82 [ 30.770869] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2949fea000 [ 30.771874] RBP: 00007f2949fea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.772856] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633e1266ec0 [ 30.773844] R13: 00007fff8e523db0 R14: 00007fff8e523de0 R15: 00007fff8e524140 [ 30.774836] [ 30.775177] [ 30.775425] Allocated by task 214: [ 30.775939] kasan_save_stack+0x22/0x50 [ 30.776526] kasan_set_track+0x25/0x30 [ 30.777097] __kasan_slab_alloc+0x59/0x70 [ 30.777704] kmem_cache_alloc+0x16b/0x370 [ 30.778302] vm_area_dup+0x20/0x160 [ 30.778832] __split_vma+0x170/0x950 [ 30.779373] split_vma+0xc6/0x110 [ 30.779890] mprotect_fixup+0x8d2/0xb30 [ 30.780476] do_mprotect_pkey+0x87e/0xd40 [ 30.781078] __x64_sys_mprotect+0x78/0xc0 [ 30.781680] do_syscall_64+0x3f/0x90 [ 30.782224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782961] [ 30.783211] Freed by task 214: [ 30.783681] kasan_save_stack+0x22/0x50 [ 30.784263] kasan_set_track+0x25/0x30 [ 30.784830] kasan_save_free_info+0x2b/0x50 [ 30.785515] __kasan_slab_free+0x10a/0x190 [ 30.786126] kmem_cache_free+0x10d/0x4d0 [ 30.786718] rcu_core+0x8c8/0x2860 [ 30.787233] __do_softirq+0x1b7/0x7d4 [ 30.787795] [ 30.788042] Last potentially related work creation: [ 30.788722] kasan_save_stack+0x22/0x50 [ 30.789306] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.790717] remove_vma+0x139/0x170 [ 30.791242] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.791910] do_vmi_munmap+0x1f1/0x2b0 [ 30.792469] __vm_munmap+0x138/0x3a0 [ 30.793008] __x64_sys_munmap+0x59/0x80 [ 30.793581] do_syscall_64+0x3f/0x90 [ 30.794123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794868] [ 30.795115] The buggy address belongs to the object at ffff88801a26e2b8 [ 30.795115] which belongs to the cache vm_area_struct of size 168 [ 30.796812] The buggy address is located 88 bytes inside of [ 30.796812] freed 168-byte region [ffff88801a26e2b8, ffff88801a26e360) [ 30.798419] [ 30.798665] The buggy address belongs to the physical page: [ 30.799417] page:0000000036593ae1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a26e [ 30.800685] memcg:ffff888018583101 [ 30.801172] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.801912] page_type: 0xffffffff() [ 30.802430] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.803485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018583101 [ 30.804546] page dumped because: kasan: bad access detected [ 30.805296] [ 30.805541] Memory state around the buggy address: [ 30.806203] ffff88801a26e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.807170] ffff88801a26e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.808153] >ffff88801a26e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.809118] ^ [ 30.809648] ffff88801a26e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.810615] ffff88801a26e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.811591] ================================================================== [ 30.812641] Disabling lock debugging due to kernel taint [ 32.885969] BUG: Bad rss-counter state mm:0000000011758faf type:MM_FILEPAGES val:33 [ 32.887145] BUG: Bad rss-counter state mm:0000000011758faf type:MM_ANONPAGES val:22 [ 33.372645] BUG: Bad rss-counter state mm:0000000086e244ea type:MM_FILEPAGES val:33 [ 33.373635] BUG: Bad rss-counter state mm:0000000086e244ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45265' (ECDSA) to the list of known hosts. 2023/06/20 11:50:11 fuzzer started 2023/06/20 11:50:11 dialing manager at localhost:36067 2023/06/20 11:50:11 checking machine... 2023/06/20 11:50:11 checking revisions... [ 34.092786] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:50:11 testing simple program... [ 34.136379] cgroup: Unknown subsys name 'net' [ 34.190575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=000055a70ad32c80 RDX=0000000000000000 RSI=0000000000000000 RDI=000055a70ad32c80 RBP=00007fd37e47bc90 RSP=00007fd37e47bb78 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=00007fd37ec7a53f R14=000055a70ad32c80 R15=0000000000802000 RIP=000055a70a67a8c3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd37e47c700 00000000 00000000 GS =0000 0000000000000000 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=00007ffff0f6e718 CR3=0000000010298000 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=2030313a30353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a30353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880169cf4d8 RCX=0000000000000001 RDX=1ffff11002d39e9d RSI=ffffffff83640612 RDI=ffff8880169cf4e8 RBP=ffff8880169cf4a8 RSP=ffff8880169cf3f0 R8 =0000000000000001 R9 =ffff8880169cf450 R10=0000000000038001 R11=000000000008a84f R12=ffff8880169cf4d8 R13=0000000000000000 R14=ffff88800f359b40 R15=ffff88800ecf5980 RIP=ffffffff813ad496 RFL=00000286 [--S--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 00007fcc87c7c900 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=00007fcc88233618 CR3=000000000e3fa000 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