syzkaller login: [ 30.279955] BUG: Bad rss-counter state mm:000000003bad7f71 type:MM_FILEPAGES val:33 [ 30.281210] BUG: Bad rss-counter state mm:000000003bad7f71 type:MM_ANONPAGES val:22 [ 30.320665] ================================================================== [ 30.321756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.322917] Read of size 8 at addr ffff88801bc12d08 by task sshd/221 [ 30.323852] [ 30.324114] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.325174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.326416] Call Trace: [ 30.326803] [ 30.327144] dump_stack_lvl+0x91/0xf0 [ 30.327728] print_report+0xcc/0x620 [ 30.328317] ? __virt_addr_valid+0x102/0x340 [ 30.328980] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.329740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.330489] kasan_report+0xbe/0xf0 [ 30.331065] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.331824] vma_interval_tree_remove+0xc75/0xec0 [ 30.332556] vma_prepare+0xc54/0x11a0 [ 30.333134] __split_vma+0x5af/0x950 [ 30.333717] ? __pfx___split_vma+0x10/0x10 [ 30.334372] ? find_held_lock+0x2c/0x110 [ 30.334993] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.335676] ? lock_is_held_type+0x9f/0x120 [ 30.336347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.337090] ? mtree_range_walk+0x632/0x900 [ 30.337761] ? mas_walk+0x5c7/0x7c0 [ 30.338350] do_vmi_munmap+0x1f1/0x2b0 [ 30.338817] mmap_region+0x1f9/0x2660 [ 30.339292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.339777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.340451] ? __pfx_lock_acquire+0x10/0x10 [ 30.340955] ? __pfx_mmap_region+0x10/0x10 [ 30.341468] ? security_mmap_addr+0x7d/0xa0 [ 30.341965] ? get_unmapped_area+0x1f5/0x3f0 [ 30.342493] do_mmap+0x854/0xf00 [ 30.342909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.343391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.343924] ksys_mmap_pgoff+0x3af/0x500 [ 30.344411] do_syscall_64+0x3f/0x90 [ 30.344860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.345476] RIP: 0033:0x7fdea2386d82 [ 30.345908] 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 [ 30.347931] RSP: 002b:00007fffe2f39a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.348814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdea2386d82 [ 30.349655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdea17c0000 [ 30.350500] RBP: 00007fdea17c0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.351347] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564448a03ec0 [ 30.352181] R13: 00007fffe2f39a90 R14: 00007fffe2f39ac0 R15: 00007fffe2f39e20 [ 30.353022] [ 30.353312] [ 30.353522] Allocated by task 214: [ 30.353949] kasan_save_stack+0x22/0x50 [ 30.354447] kasan_set_track+0x25/0x30 [ 30.354930] __kasan_slab_alloc+0x59/0x70 [ 30.355451] kmem_cache_alloc+0x16b/0x370 [ 30.355963] vm_area_dup+0x20/0x160 [ 30.356414] __split_vma+0x170/0x950 [ 30.356877] split_vma+0xc6/0x110 [ 30.357313] mprotect_fixup+0x8d2/0xb30 [ 30.357810] do_mprotect_pkey+0x87e/0xd40 [ 30.358336] __x64_sys_mprotect+0x78/0xc0 [ 30.358850] do_syscall_64+0x3f/0x90 [ 30.359319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.359941] [ 30.360158] Freed by task 214: [ 30.360555] kasan_save_stack+0x22/0x50 [ 30.361047] kasan_set_track+0x25/0x30 [ 30.361534] kasan_save_free_info+0x2b/0x50 [ 30.362059] __kasan_slab_free+0x10a/0x190 [ 30.362597] kmem_cache_free+0x10d/0x4d0 [ 30.363104] rcu_core+0x8c8/0x2860 [ 30.363552] __do_softirq+0x1b7/0x7d4 [ 30.364015] [ 30.364227] Last potentially related work creation: [ 30.364813] kasan_save_stack+0x22/0x50 [ 30.365322] __kasan_record_aux_stack+0x8e/0xa0 [ 30.365892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.366554] remove_vma+0x139/0x170 [ 30.366997] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.367545] do_vmi_munmap+0x1f1/0x2b0 [ 30.368025] __vm_munmap+0x138/0x3a0 [ 30.368483] __x64_sys_munmap+0x59/0x80 [ 30.368978] do_syscall_64+0x3f/0x90 [ 30.369454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.370092] [ 30.370309] The buggy address belongs to the object at ffff88801bc12cb0 [ 30.370309] which belongs to the cache vm_area_struct of size 168 [ 30.371769] The buggy address is located 88 bytes inside of [ 30.371769] freed 168-byte region [ffff88801bc12cb0, ffff88801bc12d58) [ 30.373153] [ 30.373364] The buggy address belongs to the physical page: [ 30.374020] page:000000007eb8aa4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc12 [ 30.375104] memcg:ffff88801a3ff301 [ 30.375522] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.376129] page_type: 0xffffffff() [ 30.376554] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.377419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3ff301 [ 30.378268] page dumped because: kasan: bad access detected [ 30.378913] [ 30.379118] Memory state around the buggy address: [ 30.379666] ffff88801bc12c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.380467] ffff88801bc12c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.381266] >ffff88801bc12d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.382070] ^ [ 30.382494] ffff88801bc12d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.383303] ffff88801bc12e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.384136] ================================================================== [ 30.385334] Disabling lock debugging due to kernel taint [ 32.637310] BUG: Bad rss-counter state mm:000000008271f2e8 type:MM_FILEPAGES val:33 [ 32.638047] BUG: Bad rss-counter state mm:000000008271f2e8 type:MM_ANONPAGES val:22 [ 33.064212] BUG: Bad rss-counter state mm:00000000a59195dd type:MM_FILEPAGES val:33 [ 33.065232] BUG: Bad rss-counter state mm:00000000a59195dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33460' (ECDSA) to the list of known hosts. 2023/06/20 06:13:10 fuzzer started 2023/06/20 06:13:11 dialing manager at localhost:44161 2023/06/20 06:13:11 checking machine... 2023/06/20 06:13:11 checking revisions... [ 33.786694] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:13:11 testing simple program... [ 33.832513] cgroup: Unknown subsys name 'net' [ 33.873555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:13:10 Registers: info registers vcpu 0 RAX=ffff888015ea8000 RBX=ffffffff813ad420 RCX=ffff88801cd87a40 RDX=0000000000000000 RSI=ffff888015ea8000 RDI=ffff88801cd879a8 RBP=ffff88801cd87a40 RSP=ffff88801cd879a0 R8 =ffff8880196d4500 R9 =0000000000000000 R10=ffffed10032da8a0 R11=0000000000000001 R12=ffff88801cd87a70 R13=0000000000000000 R14=ffff888015ea8000 R15=0000000000000cc0 RIP=ffffffff81132a70 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 00007f94dc43a900 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=00007f94dc9f20b0 CR3=000000001a29c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=000056513d0a1448 CR3=000000001a032000 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=2030313a33313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a33313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000