syzkaller login: [ 30.187142] BUG: Bad rss-counter state mm:0000000055930207 type:MM_FILEPAGES val:33 [ 30.188355] BUG: Bad rss-counter state mm:0000000055930207 type:MM_ANONPAGES val:22 [ 30.350649] ================================================================== [ 30.351594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.352538] Read of size 8 at addr ffff8880197ebb38 by task sshd/220 [ 30.353435] [ 30.353653] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.354535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.355509] Call Trace: [ 30.355831] [ 30.356117] dump_stack_lvl+0x91/0xf0 [ 30.356609] print_report+0xcc/0x620 [ 30.357092] ? __virt_addr_valid+0x102/0x340 [ 30.357639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358286] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358910] kasan_report+0xbe/0xf0 [ 30.359392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360026] vma_interval_tree_remove+0xc75/0xec0 [ 30.360627] vma_prepare+0xc54/0x11a0 [ 30.361107] __split_vma+0x5af/0x950 [ 30.361585] ? __pfx___split_vma+0x10/0x10 [ 30.362130] ? find_held_lock+0x2c/0x110 [ 30.362658] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.363232] ? lock_is_held_type+0x9f/0x120 [ 30.363773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.364385] ? mtree_range_walk+0x632/0x900 [ 30.364935] ? mas_walk+0x5c7/0x7c0 [ 30.365411] do_vmi_munmap+0x1f1/0x2b0 [ 30.365920] mmap_region+0x1f9/0x2660 [ 30.366407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.366916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.367635] ? __pfx_lock_acquire+0x10/0x10 [ 30.368164] ? __pfx_mmap_region+0x10/0x10 [ 30.368690] ? security_mmap_addr+0x7d/0xa0 [ 30.369216] ? get_unmapped_area+0x1f5/0x3f0 [ 30.369777] do_mmap+0x854/0xf00 [ 30.370229] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.370726] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.371294] ksys_mmap_pgoff+0x3af/0x500 [ 30.371798] do_syscall_64+0x3f/0x90 [ 30.372276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372934] RIP: 0033:0x7f254f32dd82 [ 30.373391] 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 [ 30.375571] RSP: 002b:00007fff8c8b3778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.376492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f254f32dd82 [ 30.377343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f254e767000 [ 30.378192] RBP: 00007f254e767000 R08: 0000000000000009 R09: 0000000000001000 [ 30.379034] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb8db6bf70 [ 30.379878] R13: 00007fff8c8b3790 R14: 00007fff8c8b37c0 R15: 00007fff8c8b3b20 [ 30.380738] [ 30.381030] [ 30.381245] Allocated by task 213: [ 30.381678] kasan_save_stack+0x22/0x50 [ 30.382199] kasan_set_track+0x25/0x30 [ 30.382692] __kasan_slab_alloc+0x59/0x70 [ 30.383215] kmem_cache_alloc+0x16b/0x370 [ 30.383726] vm_area_dup+0x20/0x160 [ 30.384179] __split_vma+0x170/0x950 [ 30.384643] split_vma+0xc6/0x110 [ 30.385079] mprotect_fixup+0x8d2/0xb30 [ 30.385577] do_mprotect_pkey+0x87e/0xd40 [ 30.386127] __x64_sys_mprotect+0x78/0xc0 [ 30.386650] do_syscall_64+0x3f/0x90 [ 30.387126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.387780] [ 30.388001] Freed by task 213: [ 30.388395] kasan_save_stack+0x22/0x50 [ 30.388900] kasan_set_track+0x25/0x30 [ 30.389394] kasan_save_free_info+0x2b/0x50 [ 30.389929] __kasan_slab_free+0x10a/0x190 [ 30.390460] kmem_cache_free+0x10d/0x4d0 [ 30.390968] rcu_core+0x8c8/0x2860 [ 30.391409] __do_softirq+0x1b7/0x7d4 [ 30.391884] [ 30.392098] Last potentially related work creation: [ 30.392684] kasan_save_stack+0x22/0x50 [ 30.393192] __kasan_record_aux_stack+0x8e/0xa0 [ 30.393787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.394433] remove_vma+0x139/0x170 [ 30.394884] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.395447] do_vmi_munmap+0x1f1/0x2b0 [ 30.395936] __vm_munmap+0x138/0x3a0 [ 30.396404] __x64_sys_munmap+0x59/0x80 [ 30.396905] do_syscall_64+0x3f/0x90 [ 30.397378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398030] [ 30.398251] The buggy address belongs to the object at ffff8880197ebae0 [ 30.398251] which belongs to the cache vm_area_struct of size 168 [ 30.399726] The buggy address is located 88 bytes inside of [ 30.399726] freed 168-byte region [ffff8880197ebae0, ffff8880197ebb88) [ 30.401126] [ 30.401342] The buggy address belongs to the physical page: [ 30.402012] page:00000000f7c47c88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197eb [ 30.403137] memcg:ffff88800f0e0701 [ 30.403562] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.404209] page_type: 0xffffffff() [ 30.404660] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.405593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0e0701 [ 30.406518] page dumped because: kasan: bad access detected [ 30.407183] [ 30.407399] Memory state around the buggy address: [ 30.407981] ffff8880197eba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.408835] ffff8880197eba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.409688] >ffff8880197ebb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410548] ^ [ 30.411157] ffff8880197ebb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.412010] ffff8880197ebc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.412861] ================================================================== [ 30.413857] Disabling lock debugging due to kernel taint [ 32.455161] BUG: Bad rss-counter state mm:00000000904c2e58 type:MM_FILEPAGES val:33 [ 32.456275] BUG: Bad rss-counter state mm:00000000904c2e58 type:MM_ANONPAGES val:22 [ 33.039245] BUG: Bad rss-counter state mm:000000003f29470f type:MM_FILEPAGES val:33 [ 33.040430] BUG: Bad rss-counter state mm:000000003f29470f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45469' (ECDSA) to the list of known hosts. 2023/06/20 14:20:20 fuzzer started 2023/06/20 14:20:20 dialing manager at localhost:36067 2023/06/20 14:20:20 checking machine... 2023/06/20 14:20:20 checking revisions... [ 33.789456] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:20 testing simple program... [ 33.837954] cgroup: Unknown subsys name 'net' [ 33.887432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:20 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=ffff88800893e780 RCX=1ffff110011fd207 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888008fe9038 RBP=ffffffff87f97640 RSP=ffff88800e6cfdc8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000009 R13=0000000000000ea0 R14=ffff888008fe8ea0 R15=0000000000000000 RIP=ffffffff838638f2 RFL=00000212 [----A--] 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 00007f401c0ce900 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=00007f401c6860b0 CR3=000000000dbb0000 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=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=00007f549f44f150 CR3=000000000edde000 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=2030323a30323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000