syzkaller login: [ 30.714755] BUG: Bad rss-counter state mm:0000000022cc083f type:MM_FILEPAGES val:33 [ 30.716243] BUG: Bad rss-counter state mm:0000000022cc083f type:MM_ANONPAGES val:22 [ 30.873147] ================================================================== [ 30.874062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.874999] Read of size 8 at addr ffff888015eb6140 by task sshd/220 [ 30.875781] [ 30.876002] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.876959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.877931] Call Trace: [ 30.878253] [ 30.878533] dump_stack_lvl+0x91/0xf0 [ 30.879026] print_report+0xcc/0x620 [ 30.879541] ? __virt_addr_valid+0x102/0x340 [ 30.880098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880714] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881331] kasan_report+0xbe/0xf0 [ 30.881810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882438] vma_interval_tree_remove+0xc75/0xec0 [ 30.883041] vma_prepare+0xc54/0x11a0 [ 30.883530] __split_vma+0x5af/0x950 [ 30.884002] ? __pfx___split_vma+0x10/0x10 [ 30.884531] ? find_held_lock+0x2c/0x110 [ 30.885048] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.885610] ? lock_is_held_type+0x9f/0x120 [ 30.886146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.886751] ? mtree_range_walk+0x632/0x900 [ 30.887299] ? mas_walk+0x5c7/0x7c0 [ 30.887782] do_vmi_munmap+0x1f1/0x2b0 [ 30.888276] mmap_region+0x1f9/0x2660 [ 30.888755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.889260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.889980] ? __pfx_lock_acquire+0x10/0x10 [ 30.890507] ? __pfx_mmap_region+0x10/0x10 [ 30.891048] ? security_mmap_addr+0x7d/0xa0 [ 30.891613] ? get_unmapped_area+0x1f5/0x3f0 [ 30.892159] do_mmap+0x854/0xf00 [ 30.892591] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.893082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.893642] ksys_mmap_pgoff+0x3af/0x500 [ 30.894151] do_syscall_64+0x3f/0x90 [ 30.894629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895274] RIP: 0033:0x7fb9981e8d82 [ 30.895745] 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 [ 30.897923] RSP: 002b:00007ffe9dc672c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.898835] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9981e8d82 [ 30.899747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb997622000 [ 30.900602] RBP: 00007fb997622000 R08: 0000000000000009 R09: 0000000000001000 [ 30.901463] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e42e4f2ec0 [ 30.902324] R13: 00007ffe9dc672e0 R14: 00007ffe9dc67310 R15: 00007ffe9dc67670 [ 30.903210] [ 30.903512] [ 30.903726] Allocated by task 213: [ 30.904158] kasan_save_stack+0x22/0x50 [ 30.904678] kasan_set_track+0x25/0x30 [ 30.905175] __kasan_slab_alloc+0x59/0x70 [ 30.905704] kmem_cache_alloc+0x16b/0x370 [ 30.906227] vm_area_dup+0x20/0x160 [ 30.906685] __split_vma+0x170/0x950 [ 30.907160] split_vma+0xc6/0x110 [ 30.907631] mprotect_fixup+0x8d2/0xb30 [ 30.908138] do_mprotect_pkey+0x87e/0xd40 [ 30.908664] __x64_sys_mprotect+0x78/0xc0 [ 30.909184] do_syscall_64+0x3f/0x90 [ 30.909669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910312] [ 30.910529] Freed by task 213: [ 30.910926] kasan_save_stack+0x22/0x50 [ 30.911442] kasan_set_track+0x25/0x30 [ 30.911944] kasan_save_free_info+0x2b/0x50 [ 30.912476] __kasan_slab_free+0x10a/0x190 [ 30.913012] kmem_cache_free+0x10d/0x4d0 [ 30.913521] rcu_core+0x8c8/0x2860 [ 30.913974] __do_softirq+0x1b7/0x7d4 [ 30.914456] [ 30.914675] Last potentially related work creation: [ 30.915264] kasan_save_stack+0x22/0x50 [ 30.915779] __kasan_record_aux_stack+0x8e/0xa0 [ 30.916356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.916999] remove_vma+0x139/0x170 [ 30.917449] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.918021] do_vmi_munmap+0x1f1/0x2b0 [ 30.918528] __vm_munmap+0x138/0x3a0 [ 30.918989] __x64_sys_munmap+0x59/0x80 [ 30.919511] do_syscall_64+0x3f/0x90 [ 30.919988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.920627] [ 30.920847] The buggy address belongs to the object at ffff888015eb60e8 [ 30.920847] which belongs to the cache vm_area_struct of size 168 [ 30.922311] The buggy address is located 88 bytes inside of [ 30.922311] freed 168-byte region [ffff888015eb60e8, ffff888015eb6190) [ 30.923709] [ 30.923925] The buggy address belongs to the physical page: [ 30.924586] page:00000000cc4e0677 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15eb6 [ 30.925675] memcg:ffff888016ca6501 [ 30.926099] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.926764] page_type: 0xffffffff() [ 30.927227] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.928155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ca6501 [ 30.929066] page dumped because: kasan: bad access detected [ 30.929725] [ 30.929942] Memory state around the buggy address: [ 30.930523] ffff888015eb6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.931387] ffff888015eb6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.932251] >ffff888015eb6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.933109] ^ [ 30.933748] ffff888015eb6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.934600] ffff888015eb6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.935476] ================================================================== [ 30.936520] Disabling lock debugging due to kernel taint [ 32.906931] BUG: Bad rss-counter state mm:000000004b31b28c type:MM_FILEPAGES val:33 [ 32.908120] BUG: Bad rss-counter state mm:000000004b31b28c type:MM_ANONPAGES val:22 [ 33.359672] BUG: Bad rss-counter state mm:000000004a6a9c7c type:MM_FILEPAGES val:33 [ 33.360729] BUG: Bad rss-counter state mm:000000004a6a9c7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61588' (ECDSA) to the list of known hosts. 2023/06/21 05:05:53 fuzzer started 2023/06/21 05:05:53 dialing manager at localhost:36067 2023/06/21 05:05:53 checking machine... 2023/06/21 05:05:53 checking revisions... [ 34.082560] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:05:53 testing simple program... [ 34.113874] cgroup: Unknown subsys name 'net' [ 34.157113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801a0af580 RSP=ffff88801a0af4b8 R8 =ffffffff861386f2 R9 =ffff88801a0af568 R10=0000000000038001 R11=0000000000020c51 R12=ffff88801a0af588 R13=ffff88801a0af570 R14=0000000000000004 R15=ffff88801a0af528 RIP=ffffffff81131711 RFL=00000246 [---Z-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 00007f4d67fff700 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=00007f0b43f02240 CR3=0000000018d96000 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=2032353a35303a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff8880096a3680 RSI=ffff88800dfbd580 RDI=ffff88800e6e3140 RBP=0000000000000003 RSP=ffff88801688f7b8 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99af0 R14=ffffffff83ab1580 R15=0000000000000006 RIP=ffffffff83ab1584 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 00007f92eff82900 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=00007f92f0539618 CR3=0000000016900000 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