syzkaller login: [ 38.115904] BUG: Bad rss-counter state mm:000000006a678801 type:MM_FILEPAGES val:33 [ 38.116709] BUG: Bad rss-counter state mm:000000006a678801 type:MM_ANONPAGES val:22 [ 38.265378] ================================================================== [ 38.266041] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.266768] Read of size 8 at addr ffff88800d918310 by task sshd/219 [ 38.267331] [ 38.267493] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.268120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.268814] Call Trace: [ 38.269048] [ 38.269260] dump_stack_lvl+0x91/0xf0 [ 38.269774] print_report+0xcc/0x620 [ 38.270151] ? __virt_addr_valid+0x102/0x340 [ 38.270574] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.271027] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.271481] kasan_report+0xbe/0xf0 [ 38.271856] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.272320] vma_interval_tree_remove+0xc75/0xec0 [ 38.272766] vma_prepare+0xc54/0x11a0 [ 38.273129] __split_vma+0x5af/0x950 [ 38.273497] ? __pfx___split_vma+0x10/0x10 [ 38.273897] ? find_held_lock+0x2c/0x110 [ 38.274324] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.274742] ? lock_is_held_type+0x9f/0x120 [ 38.275136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.275581] ? mtree_range_walk+0x632/0x900 [ 38.275982] ? mas_walk+0x5c7/0x7c0 [ 38.276339] do_vmi_munmap+0x1f1/0x2b0 [ 38.276701] mmap_region+0x1f9/0x2660 [ 38.277064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.277446] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.277985] ? __pfx_lock_acquire+0x10/0x10 [ 38.278417] ? __pfx_mmap_region+0x10/0x10 [ 38.278812] ? security_mmap_addr+0x7d/0xa0 [ 38.279203] ? get_unmapped_area+0x1f5/0x3f0 [ 38.279610] do_mmap+0x854/0xf00 [ 38.279940] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.280311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.280733] ksys_mmap_pgoff+0x3af/0x500 [ 38.281113] do_syscall_64+0x3f/0x90 [ 38.281447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.281912] RIP: 0033:0x7fc4fe16dd82 [ 38.282281] 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 [ 38.283844] RSP: 002b:00007fff6c718278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.284505] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4fe16dd82 [ 38.285134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4fd5a7000 [ 38.285771] RBP: 00007fc4fd5a7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.286441] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616a3b7eb20 [ 38.287069] R13: 00007fff6c718290 R14: 00007fff6c7182c0 R15: 00007fff6c718620 [ 38.287722] [ 38.287947] [ 38.288105] Allocated by task 212: [ 38.288435] kasan_save_stack+0x22/0x50 [ 38.288808] kasan_set_track+0x25/0x30 [ 38.289187] __kasan_slab_alloc+0x59/0x70 [ 38.289566] kmem_cache_alloc+0x16b/0x370 [ 38.289945] vm_area_dup+0x20/0x160 [ 38.290290] __split_vma+0x170/0x950 [ 38.290650] split_vma+0xc6/0x110 [ 38.290977] mprotect_fixup+0x8d2/0xb30 [ 38.291364] do_mprotect_pkey+0x87e/0xd40 [ 38.291744] __x64_sys_mprotect+0x78/0xc0 [ 38.292138] do_syscall_64+0x3f/0x90 [ 38.292497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.292981] [ 38.293141] Freed by task 212: [ 38.293422] kasan_save_stack+0x22/0x50 [ 38.293804] kasan_set_track+0x25/0x30 [ 38.294161] kasan_save_free_info+0x2b/0x50 [ 38.294574] __kasan_slab_free+0x10a/0x190 [ 38.294968] kmem_cache_free+0x10d/0x4d0 [ 38.295352] rcu_core+0x8c8/0x2860 [ 38.295682] __do_softirq+0x1b7/0x7d4 [ 38.296037] [ 38.296195] Last potentially related work creation: [ 38.296642] kasan_save_stack+0x22/0x50 [ 38.297017] __kasan_record_aux_stack+0x8e/0xa0 [ 38.297448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.297921] remove_vma+0x139/0x170 [ 38.298286] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.298707] do_vmi_munmap+0x1f1/0x2b0 [ 38.299063] __vm_munmap+0x138/0x3a0 [ 38.299392] __x64_sys_munmap+0x59/0x80 [ 38.299752] do_syscall_64+0x3f/0x90 [ 38.300125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.300585] [ 38.300735] Second to last potentially related work creation: [ 38.301217] kasan_save_stack+0x22/0x50 [ 38.301573] __kasan_record_aux_stack+0x8e/0xa0 [ 38.301988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.302480] remove_vma+0x139/0x170 [ 38.302818] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.303223] do_vmi_munmap+0x1f1/0x2b0 [ 38.303577] mmap_region+0x1f9/0x2660 [ 38.303926] do_mmap+0x854/0xf00 [ 38.304242] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.304618] ksys_mmap_pgoff+0x3af/0x500 [ 38.304986] do_syscall_64+0x3f/0x90 [ 38.305346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.305840] [ 38.306002] The buggy address belongs to the object at ffff88800d9182b8 [ 38.306002] which belongs to the cache vm_area_struct of size 168 [ 38.307087] The buggy address is located 88 bytes inside of [ 38.307087] freed 168-byte region [ffff88800d9182b8, ffff88800d918360) [ 38.308140] [ 38.308301] The buggy address belongs to the physical page: [ 38.308782] page:000000009723e534 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd918 [ 38.309577] memcg:ffff88800c7e1b01 [ 38.309886] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.310402] page_type: 0xffffffff() [ 38.310726] raw: 0100000000000200 ffff8880087a0c80 ffffea000056f580 dead000000000004 [ 38.311403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7e1b01 [ 38.312067] page dumped because: kasan: bad access detected [ 38.312566] [ 38.312728] Memory state around the buggy address: [ 38.313153] ffff88800d918200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.313794] ffff88800d918280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.314446] >ffff88800d918300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.315083] ^ [ 38.315443] ffff88800d918380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.316088] ffff88800d918400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.316720] ================================================================== [ 38.317940] Disabling lock debugging due to kernel taint [ 40.208052] BUG: Bad rss-counter state mm:00000000189b2aed type:MM_FILEPAGES val:33 [ 40.208854] BUG: Bad rss-counter state mm:00000000189b2aed type:MM_ANONPAGES val:22 [ 40.621958] BUG: Bad rss-counter state mm:000000001b211495 type:MM_FILEPAGES val:33 [ 40.622674] BUG: Bad rss-counter state mm:000000001b211495 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26914' (ECDSA) to the list of known hosts. 2023/06/21 08:11:01 fuzzer started 2023/06/21 08:11:01 dialing manager at localhost:36067 2023/06/21 08:11:01 checking machine... 2023/06/21 08:11:01 checking revisions... [ 41.284200] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:11:01 testing simple program... [ 41.332191] cgroup: Unknown subsys name 'net' [ 41.364510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110031e1ee9 RSI=ffffffff83636c06 RDI=ffff888018f0f748 RBP=ffff888018f0f7e0 RSP=ffff888018f0f720 R8 =0000000000000001 R9 =ffff888018f0f788 R10=0000000000038001 R11=0000000000091bda R12=ffff888018f0f810 R13=0000000000000000 R14=ffff888015b2d1c0 R15=ffff888018f0f748 RIP=ffffffff811305f0 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 00007fb76dc27900 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=00007ffcc1114000 CR3=0000000015b54000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=1ffff11001c3984c RDX=1ffff11001c3986a RSI=00000000000000fb RDI=ffffed1001c3984c RBP=ffffffff813782f8 RSP=ffff88806cf09e00 R8 =0000000000000130 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e1cc260 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800e1cc2e0 RIP=ffffffff81810074 RFL=00000216 [----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 0000000000000000 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=00007f72fd027d40 CR3=000000000dac8000 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=4f25e8a4de4c66b95c4adf461547bc1c XMM02=0000000000131ea0806171799158d967 XMM03=0000000000132ac01319e678c5640f8a XMM04=cf159e34001574cf00000000000ae988 XMM05=be00d584c96cfa6f0000000000132ac0 XMM06=dfcdbad4f1609c370000000000131ea0 XMM07=139997807ff5a4420000000000122a18 XMM08=e042d86d42eb936e0000000000121270 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000