syzkaller login: [ 28.885910] BUG: Bad rss-counter state mm:00000000c2ba16ef type:MM_FILEPAGES val:33 [ 28.887388] BUG: Bad rss-counter state mm:00000000c2ba16ef type:MM_ANONPAGES val:22 [ 29.050267] ================================================================== [ 29.051190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.052128] Read of size 8 at addr ffff88800ddfd798 by task sshd/220 [ 29.052896] [ 29.053114] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.054101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.055057] Call Trace: [ 29.055375] [ 29.055658] dump_stack_lvl+0x91/0xf0 [ 29.056335] print_report+0xcc/0x620 [ 29.056934] ? __virt_addr_valid+0x102/0x340 [ 29.057659] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.058437] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.059196] kasan_report+0xbe/0xf0 [ 29.059786] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.060571] vma_interval_tree_remove+0xc75/0xec0 [ 29.061340] vma_prepare+0xc54/0x11a0 [ 29.061948] __split_vma+0x5af/0x950 [ 29.062543] ? __pfx___split_vma+0x10/0x10 [ 29.063208] ? find_held_lock+0x2c/0x110 [ 29.063860] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.064579] ? lock_is_held_type+0x9f/0x120 [ 29.065276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.066045] ? mtree_range_walk+0x632/0x900 [ 29.066745] ? mas_walk+0x5c7/0x7c0 [ 29.067362] do_vmi_munmap+0x1f1/0x2b0 [ 29.067965] mmap_region+0x1f9/0x2660 [ 29.068591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.069239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.070137] ? __pfx_lock_acquire+0x10/0x10 [ 29.070681] ? __pfx_mmap_region+0x10/0x10 [ 29.071229] ? security_mmap_addr+0x7d/0xa0 [ 29.071762] ? get_unmapped_area+0x1f5/0x3f0 [ 29.072332] do_mmap+0x854/0xf00 [ 29.072769] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.073280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.073871] ksys_mmap_pgoff+0x3af/0x500 [ 29.074397] do_syscall_64+0x3f/0x90 [ 29.074877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.075537] RIP: 0033:0x7f5d55f0cd82 [ 29.075994] 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 [ 29.078141] RSP: 002b:00007fffcfb76c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.079067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d55f0cd82 [ 29.079935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d55346000 [ 29.080791] RBP: 00007f5d55346000 R08: 0000000000000009 R09: 0000000000001000 [ 29.081687] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565647a5ec0 [ 29.082547] R13: 00007fffcfb76c20 R14: 00007fffcfb76c50 R15: 00007fffcfb76fb0 [ 29.083416] [ 29.083709] [ 29.083924] Allocated by task 212: [ 29.084375] kasan_save_stack+0x22/0x50 [ 29.084886] kasan_set_track+0x25/0x30 [ 29.085407] __kasan_slab_alloc+0x59/0x70 [ 29.085960] kmem_cache_alloc+0x16b/0x370 [ 29.086489] vm_area_dup+0x20/0x160 [ 29.086945] __split_vma+0x170/0x950 [ 29.087425] split_vma+0xc6/0x110 [ 29.087872] mprotect_fixup+0x8d2/0xb30 [ 29.088391] do_mprotect_pkey+0x87e/0xd40 [ 29.088916] __x64_sys_mprotect+0x78/0xc0 [ 29.089455] do_syscall_64+0x3f/0x90 [ 29.089967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.090632] [ 29.090850] Freed by task 212: [ 29.091266] kasan_save_stack+0x22/0x50 [ 29.091783] kasan_set_track+0x25/0x30 [ 29.092295] kasan_save_free_info+0x2b/0x50 [ 29.092832] __kasan_slab_free+0x10a/0x190 [ 29.093380] kmem_cache_free+0x10d/0x4d0 [ 29.093903] rcu_core+0x8c8/0x2860 [ 29.094363] __do_softirq+0x1b7/0x7d4 [ 29.094839] [ 29.095057] Last potentially related work creation: [ 29.095664] kasan_save_stack+0x22/0x50 [ 29.096168] __kasan_record_aux_stack+0x8e/0xa0 [ 29.096797] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.097497] remove_vma+0x139/0x170 [ 29.098004] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.098612] do_vmi_munmap+0x1f1/0x2b0 [ 29.099123] __vm_munmap+0x138/0x3a0 [ 29.099638] __x64_sys_munmap+0x59/0x80 [ 29.100173] do_syscall_64+0x3f/0x90 [ 29.100696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.101390] [ 29.101625] The buggy address belongs to the object at ffff88800ddfd740 [ 29.101625] which belongs to the cache vm_area_struct of size 168 [ 29.103219] The buggy address is located 88 bytes inside of [ 29.103219] freed 168-byte region [ffff88800ddfd740, ffff88800ddfd7e8) [ 29.104746] [ 29.104978] The buggy address belongs to the physical page: [ 29.105716] page:00000000bcd15056 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddfd [ 29.106925] memcg:ffff88800fcad201 [ 29.107402] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.108108] page_type: 0xffffffff() [ 29.108606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.109638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcad201 [ 29.110637] page dumped because: kasan: bad access detected [ 29.111326] [ 29.111547] Memory state around the buggy address: [ 29.112176] ffff88800ddfd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.113118] ffff88800ddfd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.113996] >ffff88800ddfd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.114914] ^ [ 29.115466] ffff88800ddfd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.116413] ffff88800ddfd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.117340] ================================================================== [ 29.118408] Disabling lock debugging due to kernel taint [ 31.639226] BUG: Bad rss-counter state mm:00000000bc14fae2 type:MM_FILEPAGES val:33 [ 31.640456] BUG: Bad rss-counter state mm:00000000bc14fae2 type:MM_ANONPAGES val:22 [ 32.082641] BUG: Bad rss-counter state mm:0000000060d1609a type:MM_FILEPAGES val:33 [ 32.083633] BUG: Bad rss-counter state mm:0000000060d1609a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29719' (ECDSA) to the list of known hosts. 2023/06/21 07:32:36 fuzzer started 2023/06/21 07:32:36 dialing manager at localhost:36067 2023/06/21 07:32:36 checking machine... 2023/06/21 07:32:36 checking revisions... [ 32.825504] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:32:36 testing simple program... [ 32.871777] cgroup: Unknown subsys name 'net' [ 32.916518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:35 Registers: info registers vcpu 0 RAX=0000000000020d9c RBX=0000000000000001 RCX=ffffffff8180c704 RDX=0000000000020da8 RSI=00000000000080c7 RDI=ffffffff86138ef8 RBP=ffff88801025f8a0 RSP=ffff88801025f7d8 R8 =ffffffff86138eb0 R9 =ffff88801025f888 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801025f8a8 R13=ffff88801025f890 R14=ffff88801025f889 R15=ffff88801025f848 RIP=ffffffff81130868 RFL=00000297 [--S-APC] 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 00007f5039501900 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=00007ffdcd9ff000 CR3=0000000014666000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fa5031ab980 CR3=000000000ebd4000 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=32333a3730203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303436 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000