syzkaller login: [ 38.926752] BUG: Bad rss-counter state mm:00000000fbb580d2 type:MM_FILEPAGES val:33 [ 38.927970] BUG: Bad rss-counter state mm:00000000fbb580d2 type:MM_ANONPAGES val:22 [ 38.963648] ================================================================== [ 38.964815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.965918] Read of size 8 at addr ffff88800d4af5c8 by task sshd/218 [ 38.966835] [ 38.967093] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.968131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.969313] Call Trace: [ 38.969690] [ 38.970031] dump_stack_lvl+0x91/0xf0 [ 38.970610] print_report+0xcc/0x620 [ 38.971186] ? __virt_addr_valid+0x102/0x340 [ 38.971862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972546] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973150] kasan_report+0xbe/0xf0 [ 38.973616] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.974215] vma_interval_tree_remove+0xc75/0xec0 [ 38.974791] vma_prepare+0xc54/0x11a0 [ 38.975261] __split_vma+0x5af/0x950 [ 38.975732] ? __pfx___split_vma+0x10/0x10 [ 38.976230] ? find_held_lock+0x2c/0x110 [ 38.976724] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.977258] ? lock_is_held_type+0x9f/0x120 [ 38.977768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.978334] ? mtree_range_walk+0x632/0x900 [ 38.978856] ? mas_walk+0x5c7/0x7c0 [ 38.979304] do_vmi_munmap+0x1f1/0x2b0 [ 38.979789] mmap_region+0x1f9/0x2660 [ 38.980241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.980723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.981392] ? __pfx_lock_acquire+0x10/0x10 [ 38.981888] ? __pfx_mmap_region+0x10/0x10 [ 38.982382] ? security_mmap_addr+0x7d/0xa0 [ 38.982896] ? get_unmapped_area+0x1f5/0x3f0 [ 38.983431] do_mmap+0x854/0xf00 [ 38.983872] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.984354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.984904] ksys_mmap_pgoff+0x3af/0x500 [ 38.985396] do_syscall_64+0x3f/0x90 [ 38.985872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986501] RIP: 0033:0x7f539b755d82 [ 38.986947] 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 [ 38.989029] RSP: 002b:00007ffee519a0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.989917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f539b755d82 [ 38.990753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f539ab8f000 [ 38.991664] RBP: 00007f539ab8f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.992485] R10: 0000000000000812 R11: 0000000000000206 R12: 000055814ea8aec0 [ 38.993337] R13: 00007ffee519a0f0 R14: 00007ffee519a120 R15: 00007ffee519a480 [ 38.994190] [ 38.994477] [ 38.994689] Allocated by task 211: [ 38.995109] kasan_save_stack+0x22/0x50 [ 38.995611] kasan_set_track+0x25/0x30 [ 38.996096] __kasan_slab_alloc+0x59/0x70 [ 38.996612] kmem_cache_alloc+0x16b/0x370 [ 38.997120] vm_area_dup+0x20/0x160 [ 38.997566] __split_vma+0x170/0x950 [ 38.998028] split_vma+0xc6/0x110 [ 38.998464] mprotect_fixup+0x8d2/0xb30 [ 38.998963] do_mprotect_pkey+0x87e/0xd40 [ 38.999470] __x64_sys_mprotect+0x78/0xc0 [ 39.000018] do_syscall_64+0x3f/0x90 [ 39.000480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001114] [ 39.001331] Freed by task 211: [ 39.001726] kasan_save_stack+0x22/0x50 [ 39.002268] kasan_set_track+0x25/0x30 [ 39.002745] kasan_save_free_info+0x2b/0x50 [ 39.003261] __kasan_slab_free+0x10a/0x190 [ 39.003809] kmem_cache_free+0x10d/0x4d0 [ 39.004312] rcu_core+0x8c8/0x2860 [ 39.004746] __do_softirq+0x1b7/0x7d4 [ 39.005227] [ 39.005434] Last potentially related work creation: [ 39.006005] kasan_save_stack+0x22/0x50 [ 39.006505] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007732] remove_vma+0x139/0x170 [ 39.008169] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008724] do_vmi_munmap+0x1f1/0x2b0 [ 39.009198] __vm_munmap+0x138/0x3a0 [ 39.009664] __x64_sys_munmap+0x59/0x80 [ 39.010153] do_syscall_64+0x3f/0x90 [ 39.010625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011251] [ 39.011458] Second to last potentially related work creation: [ 39.012144] kasan_save_stack+0x22/0x50 [ 39.012632] __kasan_record_aux_stack+0x8e/0xa0 [ 39.013191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.013823] remove_vma+0x139/0x170 [ 39.014263] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.014812] do_vmi_munmap+0x1f1/0x2b0 [ 39.015280] mmap_region+0x1f9/0x2660 [ 39.015773] do_mmap+0x854/0xf00 [ 39.016188] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.016676] ksys_mmap_pgoff+0x3af/0x500 [ 39.017164] do_syscall_64+0x3f/0x90 [ 39.017643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018274] [ 39.018491] The buggy address belongs to the object at ffff88800d4af570 [ 39.018491] which belongs to the cache vm_area_struct of size 168 [ 39.019930] The buggy address is located 88 bytes inside of [ 39.019930] freed 168-byte region [ffff88800d4af570, ffff88800d4af618) [ 39.021313] [ 39.021523] The buggy address belongs to the physical page: [ 39.022168] page:0000000040447f61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4af [ 39.023234] memcg:ffff88800d50d201 [ 39.023667] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.024286] page_type: 0xffffffff() [ 39.024726] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d400 dead000000000008 [ 39.025630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d50d201 [ 39.026507] page dumped because: kasan: bad access detected [ 39.027160] [ 39.027367] Memory state around the buggy address: [ 39.027955] ffff88800d4af480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.028799] ffff88800d4af500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.029644] >ffff88800d4af580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.030471] ^ [ 39.031127] ffff88800d4af600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.031983] ffff88800d4af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.032815] ================================================================== [ 39.033972] Disabling lock debugging due to kernel taint [ 40.592323] BUG: Bad rss-counter state mm:00000000c8eafa76 type:MM_FILEPAGES val:33 [ 40.593050] BUG: Bad rss-counter state mm:00000000c8eafa76 type:MM_ANONPAGES val:22 [ 41.131657] BUG: Bad rss-counter state mm:0000000071bbb279 type:MM_FILEPAGES val:33 [ 41.132651] BUG: Bad rss-counter state mm:0000000071bbb279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30771' (ECDSA) to the list of known hosts. 2023/06/20 16:17:47 fuzzer started 2023/06/20 16:17:47 dialing manager at localhost:36067 2023/06/20 16:17:47 checking machine... 2023/06/20 16:17:47 checking revisions... [ 41.784788] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:17:47 testing simple program... [ 41.831716] cgroup: Unknown subsys name 'net' [ 41.881432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:17:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801645d1c0 RSI=ffffffff81eecf28 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888017effa68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800dda5400 R14=ffff88801b035bd8 R15=ffff88800dda5598 RIP=ffffffff81ef19ac RFL=00000296 [--S-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 00007f7c65433900 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=00007f7c659e8650 CR3=0000000017c40000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001cdcf5a RSP=ffff88800e6e7ab0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800b379d60 R13=ffffffff81704d42 R14=ffff88800e6e7cf8 R15=ffff88800e6e7cd8 RIP=ffffffff8135b980 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 00007f023837c700 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=00007fb46709be50 CR3=0000000016a38000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732037343a3731 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000