syzkaller login: [ 36.519572] BUG: Bad rss-counter state mm:000000000dda051c type:MM_FILEPAGES val:33 [ 36.520724] BUG: Bad rss-counter state mm:000000000dda051c type:MM_ANONPAGES val:22 [ 36.559654] ================================================================== [ 36.560582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.561507] Read of size 8 at addr ffff888016c59310 by task sshd/219 [ 36.562274] [ 36.562500] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.563354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.564305] Call Trace: [ 36.564627] [ 36.564909] dump_stack_lvl+0x91/0xf0 [ 36.565395] print_report+0xcc/0x620 [ 36.565882] ? __virt_addr_valid+0x102/0x340 [ 36.566426] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.567046] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.567655] kasan_report+0xbe/0xf0 [ 36.568130] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.568744] vma_interval_tree_remove+0xc75/0xec0 [ 36.569337] vma_prepare+0xc54/0x11a0 [ 36.569835] __split_vma+0x5af/0x950 [ 36.570302] ? __pfx___split_vma+0x10/0x10 [ 36.570827] ? find_held_lock+0x2c/0x110 [ 36.571349] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.571906] ? lock_is_held_type+0x9f/0x120 [ 36.572443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.573041] ? mtree_range_walk+0x632/0x900 [ 36.573595] ? mas_walk+0x5c7/0x7c0 [ 36.574074] do_vmi_munmap+0x1f1/0x2b0 [ 36.574565] mmap_region+0x1f9/0x2660 [ 36.575052] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.575575] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.576291] ? __pfx_lock_acquire+0x10/0x10 [ 36.576828] ? __pfx_mmap_region+0x10/0x10 [ 36.577364] ? security_mmap_addr+0x7d/0xa0 [ 36.577913] ? get_unmapped_area+0x1f5/0x3f0 [ 36.578470] do_mmap+0x854/0xf00 [ 36.578918] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.579420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.579986] ksys_mmap_pgoff+0x3af/0x500 [ 36.580505] do_syscall_64+0x3f/0x90 [ 36.580986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.581653] RIP: 0033:0x7f684db33d82 [ 36.582142] 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 [ 36.584286] RSP: 002b:00007fff0f1f7668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.585197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f684db33d82 [ 36.586067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f684cf6d000 [ 36.587071] RBP: 00007f684cf6d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.587940] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fdcfa2ec0 [ 36.588798] R13: 00007fff0f1f7680 R14: 00007fff0f1f76b0 R15: 00007fff0f1f7a10 [ 36.589666] [ 36.589983] [ 36.590206] Allocated by task 212: [ 36.590637] kasan_save_stack+0x22/0x50 [ 36.591152] kasan_set_track+0x25/0x30 [ 36.591658] __kasan_slab_alloc+0x59/0x70 [ 36.592195] kmem_cache_alloc+0x16b/0x370 [ 36.592723] vm_area_dup+0x20/0x160 [ 36.593178] __split_vma+0x170/0x950 [ 36.593651] split_vma+0xc6/0x110 [ 36.594103] mprotect_fixup+0x8d2/0xb30 [ 36.594603] do_mprotect_pkey+0x87e/0xd40 [ 36.595116] __x64_sys_mprotect+0x78/0xc0 [ 36.595634] do_syscall_64+0x3f/0x90 [ 36.596104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.596742] [ 36.596954] Freed by task 212: [ 36.597346] kasan_save_stack+0x22/0x50 [ 36.597846] kasan_set_track+0x25/0x30 [ 36.598341] kasan_save_free_info+0x2b/0x50 [ 36.598877] __kasan_slab_free+0x10a/0x190 [ 36.599413] kmem_cache_free+0x10d/0x4d0 [ 36.599920] rcu_core+0x8c8/0x2860 [ 36.600358] __do_softirq+0x1b7/0x7d4 [ 36.600836] [ 36.601050] Last potentially related work creation: [ 36.601625] kasan_save_stack+0x22/0x50 [ 36.602147] __kasan_record_aux_stack+0x8e/0xa0 [ 36.602716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.603358] remove_vma+0x139/0x170 [ 36.603809] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.604356] do_vmi_munmap+0x1f1/0x2b0 [ 36.604840] __vm_munmap+0x138/0x3a0 [ 36.605308] __x64_sys_munmap+0x59/0x80 [ 36.605809] do_syscall_64+0x3f/0x90 [ 36.606279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.606918] [ 36.607133] The buggy address belongs to the object at ffff888016c592b8 [ 36.607133] which belongs to the cache vm_area_struct of size 168 [ 36.608602] The buggy address is located 88 bytes inside of [ 36.608602] freed 168-byte region [ffff888016c592b8, ffff888016c59360) [ 36.610014] [ 36.610228] The buggy address belongs to the physical page: [ 36.610897] page:00000000ecdb1332 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c59 [ 36.611990] memcg:ffff888016c5a001 [ 36.612422] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.613076] page_type: 0xffffffff() [ 36.613533] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388c40 dead00000000000a [ 36.614479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c5a001 [ 36.615393] page dumped because: kasan: bad access detected [ 36.616061] [ 36.616279] Memory state around the buggy address: [ 36.616864] ffff888016c59200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.617729] ffff888016c59280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.618604] >ffff888016c59300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.619468] ^ [ 36.619942] ffff888016c59380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.620797] ffff888016c59400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.621658] ================================================================== [ 36.623114] Disabling lock debugging due to kernel taint [ 38.475438] BUG: Bad rss-counter state mm:000000002cd88964 type:MM_FILEPAGES val:33 [ 38.476663] BUG: Bad rss-counter state mm:000000002cd88964 type:MM_ANONPAGES val:22 [ 38.982130] BUG: Bad rss-counter state mm:00000000f994924f type:MM_FILEPAGES val:33 [ 38.983341] BUG: Bad rss-counter state mm:00000000f994924f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58234' (ECDSA) to the list of known hosts. 2023/06/20 11:35:14 fuzzer started 2023/06/20 11:35:14 dialing manager at localhost:36067 2023/06/20 11:35:14 checking machine... 2023/06/20 11:35:14 checking revisions... [ 39.638633] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:35:14 testing simple program... [ 39.688526] cgroup: Unknown subsys name 'net' [ 39.774726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:35:14 Registers: info registers vcpu 0 RAX=ffff888018278c60 RBX=ffff888008d9fdc8 RCX=1ffff1100304f18c RDX=ffff888018278410 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000005 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800cbf4730 RIP=ffffffff8137fcd9 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 0000000000000000 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=00007fa61539a618 CR3=000000001bc14000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=000056017d31ef18 RCX=00007fa6152c66c3 RDX=0000000000000006 RSI=0000000000000007 RDI=ffff888015937fc8 RBP=0000000000000000 RSP=fffffe0000049ff8 R8 =000056017d330630 R9 =00007ffc54edc068 R10=000056017d31eeb0 R11=0000000000000246 R12=0000000000000008 R13=000056017d31f350 R14=0000000000000069 R15=0000000000000000 RIP=ffffffff84600154 RFL=00000046 [---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 00007fa614de3900 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=00007ffc54edd000 CR3=000000001bc14000 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=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