syzkaller login: [ 31.421561] BUG: Bad rss-counter state mm:0000000029fea57a type:MM_FILEPAGES val:33 [ 31.422498] BUG: Bad rss-counter state mm:0000000029fea57a type:MM_ANONPAGES val:22 [ 31.528003] ================================================================== [ 31.528642] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.529261] Read of size 8 at addr ffff88801601e6b0 by task sshd/221 [ 31.529814] [ 31.529970] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.530551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.531204] Call Trace: [ 31.531413] [ 31.531600] dump_stack_lvl+0x91/0xf0 [ 31.531959] print_report+0xcc/0x620 [ 31.532294] ? __virt_addr_valid+0x102/0x340 [ 31.532840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533319] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533742] kasan_report+0xbe/0xf0 [ 31.534057] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.534467] vma_interval_tree_remove+0xc75/0xec0 [ 31.534865] vma_prepare+0xc54/0x11a0 [ 31.535211] __split_vma+0x5af/0x950 [ 31.535522] ? __pfx___split_vma+0x10/0x10 [ 31.535901] ? find_held_lock+0x2c/0x110 [ 31.536247] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.536619] ? lock_is_held_type+0x9f/0x120 [ 31.537020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.537425] ? mtree_range_walk+0x632/0x900 [ 31.537841] ? mas_walk+0x5c7/0x7c0 [ 31.538169] do_vmi_munmap+0x1f1/0x2b0 [ 31.538504] mmap_region+0x1f9/0x2660 [ 31.538821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.539159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.539643] ? __pfx_lock_acquire+0x10/0x10 [ 31.540003] ? __pfx_mmap_region+0x10/0x10 [ 31.540357] ? security_mmap_addr+0x7d/0xa0 [ 31.540713] ? get_unmapped_area+0x1f5/0x3f0 [ 31.541110] do_mmap+0x854/0xf00 [ 31.541395] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.541735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.542111] ksys_mmap_pgoff+0x3af/0x500 [ 31.542444] do_syscall_64+0x3f/0x90 [ 31.542755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.543174] RIP: 0033:0x7f27d601ad82 [ 31.543475] 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 [ 31.544833] RSP: 002b:00007ffd4dbac3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.545417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27d601ad82 [ 31.545996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27d5454000 [ 31.546535] RBP: 00007f27d5454000 R08: 0000000000000009 R09: 0000000000001000 [ 31.547110] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d547aaec0 [ 31.547643] R13: 00007ffd4dbac3c0 R14: 00007ffd4dbac3f0 R15: 00007ffd4dbac750 [ 31.548196] [ 31.548385] [ 31.548525] Allocated by task 214: [ 31.548800] kasan_save_stack+0x22/0x50 [ 31.549121] kasan_set_track+0x25/0x30 [ 31.549441] __kasan_slab_alloc+0x59/0x70 [ 31.549792] kmem_cache_alloc+0x16b/0x370 [ 31.550120] vm_area_dup+0x20/0x160 [ 31.550410] __split_vma+0x170/0x950 [ 31.550710] split_vma+0xc6/0x110 [ 31.550996] mprotect_fixup+0x8d2/0xb30 [ 31.551324] do_mprotect_pkey+0x87e/0xd40 [ 31.551654] __x64_sys_mprotect+0x78/0xc0 [ 31.552018] do_syscall_64+0x3f/0x90 [ 31.552326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.552761] [ 31.552932] Freed by task 214: [ 31.553222] kasan_save_stack+0x22/0x50 [ 31.553581] kasan_set_track+0x25/0x30 [ 31.553925] kasan_save_free_info+0x2b/0x50 [ 31.554256] __kasan_slab_free+0x10a/0x190 [ 31.554591] kmem_cache_free+0x10d/0x4d0 [ 31.554915] rcu_core+0x8c8/0x2860 [ 31.555208] __do_softirq+0x1b7/0x7d4 [ 31.555529] [ 31.555670] Last potentially related work creation: [ 31.556048] kasan_save_stack+0x22/0x50 [ 31.556368] __kasan_record_aux_stack+0x8e/0xa0 [ 31.556740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.557188] remove_vma+0x139/0x170 [ 31.557474] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.557868] do_vmi_munmap+0x1f1/0x2b0 [ 31.558217] __vm_munmap+0x138/0x3a0 [ 31.558527] __x64_sys_munmap+0x59/0x80 [ 31.558856] do_syscall_64+0x3f/0x90 [ 31.559173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559595] [ 31.559740] The buggy address belongs to the object at ffff88801601e658 [ 31.559740] which belongs to the cache vm_area_struct of size 168 [ 31.560744] The buggy address is located 88 bytes inside of [ 31.560744] freed 168-byte region [ffff88801601e658, ffff88801601e700) [ 31.561754] [ 31.561922] The buggy address belongs to the physical page: [ 31.562446] page:0000000094d38055 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1601e [ 31.563181] memcg:ffff888009740501 [ 31.563450] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.563883] page_type: 0xffffffff() [ 31.564198] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.564840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009740501 [ 31.565426] page dumped because: kasan: bad access detected [ 31.565884] [ 31.566021] Memory state around the buggy address: [ 31.566399] ffff88801601e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.567020] ffff88801601e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.567628] >ffff88801601e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.568230] ^ [ 31.568606] ffff88801601e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.569148] ffff88801601e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.569728] ================================================================== [ 31.570374] Disabling lock debugging due to kernel taint [ 33.392707] BUG: Bad rss-counter state mm:00000000f15f98a3 type:MM_FILEPAGES val:33 [ 33.393450] BUG: Bad rss-counter state mm:00000000f15f98a3 type:MM_ANONPAGES val:22 [ 33.693620] BUG: Bad rss-counter state mm:00000000ca5eba1e type:MM_FILEPAGES val:33 [ 33.694306] BUG: Bad rss-counter state mm:00000000ca5eba1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19944' (ECDSA) to the list of known hosts. 2023/06/21 09:22:00 fuzzer started 2023/06/21 09:22:00 dialing manager at localhost:36067 2023/06/21 09:22:00 checking machine... 2023/06/21 09:22:00 checking revisions... [ 34.246924] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:22:00 testing simple program... [ 34.273907] cgroup: Unknown subsys name 'net' [ 34.332606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1b165adc90 CR3=000000000f332000 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=837e74d3963d2d8cdd4b40c9092d98bc XMM02=ec2efd57dc4c00df000000000011a100 XMM03=38248a52b5e37076000000000011a1d0 XMM04=54148f31537752f500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131478 XMM06=901f7055f44804e800000000001302e0 XMM07=e042d86d42eb936e0000000000121930 XMM08=38248a52b5e37076000000000011a1d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880163e9870 RBX=ffff8880163e9948 RCX=0000000080120006 RDX=0000000080120007 RSI=ffff8880163e9948 RDI=ffff8880087a0dc0 RBP=ffff888018e57a28 RSP=ffff888018e57990 R8 =0000000080120006 R9 =0000000000000000 R10=ffffea000058fa40 R11=0000000080110000 R12=ffffea000058fa40 R13=ffff8880163e9870 R14=0000000080120006 R15=ffff8880087a0dc0 RIP=ffffffff8180973f RFL=00000242 [---Z---] 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 00007ffb814fe900 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=00007ffd76320000 CR3=00000000144cc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000