syzkaller login: [ 38.950487] BUG: Bad rss-counter state mm:000000000af187ae type:MM_FILEPAGES val:33 [ 38.951833] BUG: Bad rss-counter state mm:000000000af187ae type:MM_ANONPAGES val:22 [ 38.992834] ================================================================== [ 38.993907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.994912] Read of size 8 at addr ffff88800dad6c20 by task sshd/218 [ 38.995741] [ 38.995978] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.996925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.997973] Call Trace: [ 38.998317] [ 38.998628] dump_stack_lvl+0x91/0xf0 [ 38.999154] print_report+0xcc/0x620 [ 38.999675] ? __virt_addr_valid+0x102/0x340 [ 39.000284] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000948] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001616] kasan_report+0xbe/0xf0 [ 39.002128] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.002807] vma_interval_tree_remove+0xc75/0xec0 [ 39.003458] vma_prepare+0xc54/0x11a0 [ 39.003971] __split_vma+0x5af/0x950 [ 39.004487] ? __pfx___split_vma+0x10/0x10 [ 39.005074] ? find_held_lock+0x2c/0x110 [ 39.005639] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.006250] ? lock_is_held_type+0x9f/0x120 [ 39.006838] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.007500] ? mtree_range_walk+0x632/0x900 [ 39.008127] ? mas_walk+0x5c7/0x7c0 [ 39.008643] do_vmi_munmap+0x1f1/0x2b0 [ 39.009181] mmap_region+0x1f9/0x2660 [ 39.009719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.010285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.011065] ? __pfx_lock_acquire+0x10/0x10 [ 39.011652] ? __pfx_mmap_region+0x10/0x10 [ 39.012235] ? security_mmap_addr+0x7d/0xa0 [ 39.012811] ? get_unmapped_area+0x1f5/0x3f0 [ 39.013409] do_mmap+0x854/0xf00 [ 39.013889] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.014433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.015043] ksys_mmap_pgoff+0x3af/0x500 [ 39.015597] do_syscall_64+0x3f/0x90 [ 39.016133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.016837] RIP: 0033:0x7f7ed096ad82 [ 39.017332] 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 [ 39.019812] RSP: 002b:00007fffe4b54d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.020840] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ed096ad82 [ 39.021821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ecfda4000 [ 39.022747] RBP: 00007f7ecfda4000 R08: 0000000000000009 R09: 0000000000001000 [ 39.023667] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566af828ec0 [ 39.024614] R13: 00007fffe4b54d40 R14: 00007fffe4b54d70 R15: 00007fffe4b550d0 [ 39.025540] [ 39.025861] [ 39.026095] Allocated by task 211: [ 39.026567] kasan_save_stack+0x22/0x50 [ 39.027122] kasan_set_track+0x25/0x30 [ 39.027665] __kasan_slab_alloc+0x59/0x70 [ 39.028227] kmem_cache_alloc+0x16b/0x370 [ 39.028797] vm_area_dup+0x20/0x160 [ 39.029286] __split_vma+0x170/0x950 [ 39.029783] split_vma+0xc6/0x110 [ 39.030267] mprotect_fixup+0x8d2/0xb30 [ 39.030804] do_mprotect_pkey+0x87e/0xd40 [ 39.031376] __x64_sys_mprotect+0x78/0xc0 [ 39.031928] do_syscall_64+0x3f/0x90 [ 39.032437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033120] [ 39.033355] Freed by task 211: [ 39.033778] kasan_save_stack+0x22/0x50 [ 39.034313] kasan_set_track+0x25/0x30 [ 39.034844] kasan_save_free_info+0x2b/0x50 [ 39.035415] __kasan_slab_free+0x10a/0x190 [ 39.035992] kmem_cache_free+0x10d/0x4d0 [ 39.036556] rcu_core+0x8c8/0x2860 [ 39.037036] __do_softirq+0x1b7/0x7d4 [ 39.037567] [ 39.037802] Last potentially related work creation: [ 39.038438] kasan_save_stack+0x22/0x50 [ 39.038989] __kasan_record_aux_stack+0x8e/0xa0 [ 39.039616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.040321] remove_vma+0x139/0x170 [ 39.040815] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.041425] do_vmi_munmap+0x1f1/0x2b0 [ 39.041956] __vm_munmap+0x138/0x3a0 [ 39.042468] __x64_sys_munmap+0x59/0x80 [ 39.043007] do_syscall_64+0x3f/0x90 [ 39.043523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.044214] [ 39.044449] The buggy address belongs to the object at ffff88800dad6bc8 [ 39.044449] which belongs to the cache vm_area_struct of size 168 [ 39.046050] The buggy address is located 88 bytes inside of [ 39.046050] freed 168-byte region [ffff88800dad6bc8, ffff88800dad6c70) [ 39.047593] [ 39.047828] The buggy address belongs to the physical page: [ 39.048552] page:0000000059ff6a11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdad6 [ 39.049730] memcg:ffff88800d400b01 [ 39.050206] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.050926] page_type: 0xffffffff() [ 39.051420] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.052425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d400b01 [ 39.053393] page dumped because: kasan: bad access detected [ 39.054107] [ 39.054340] Memory state around the buggy address: [ 39.054958] ffff88800dad6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.055877] ffff88800dad6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.056796] >ffff88800dad6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.057698] ^ [ 39.058255] ffff88800dad6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.059163] ffff88800dad6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.060095] ================================================================== [ 39.061238] Disabling lock debugging due to kernel taint [ 40.931660] BUG: Bad rss-counter state mm:00000000fea559e7 type:MM_FILEPAGES val:33 [ 40.932244] BUG: Bad rss-counter state mm:00000000fea559e7 type:MM_ANONPAGES val:22 [ 41.438039] BUG: Bad rss-counter state mm:00000000db7511d9 type:MM_FILEPAGES val:33 [ 41.439284] BUG: Bad rss-counter state mm:00000000db7511d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31305' (ECDSA) to the list of known hosts. 2023/06/20 15:18:35 fuzzer started 2023/06/20 15:18:35 dialing manager at localhost:36067 2023/06/20 15:18:35 checking machine... 2023/06/20 15:18:35 checking revisions... [ 42.109124] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:18:35 testing simple program... [ 42.164964] cgroup: Unknown subsys name 'net' [ 42.216468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:18:35 Registers: info registers vcpu 0 RAX=1ffff11001bbba39 RBX=ffff88800dddd198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dddd1c8 RBP=ffff8880147f4000 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff8880147f47e8 R14=ffffffff813782f8 R15=ffff8880147f47e8 RIP=ffffffff818464ec 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5fae6b6900 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=00007f5faec6e0b0 CR3=000000000c4e2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffc7bc84e18 CR3=00000000174f8000 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=2035333a38313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000