syzkaller login: [ 30.705944] BUG: Bad rss-counter state mm:000000002816c29e type:MM_FILEPAGES val:33 [ 30.706646] BUG: Bad rss-counter state mm:000000002816c29e type:MM_ANONPAGES val:22 [ 30.823498] ================================================================== [ 30.824366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.825078] Read of size 8 at addr ffff88801b862c20 by task sshd/220 [ 30.825764] [ 30.825933] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827334] Call Trace: [ 30.827602] [ 30.827818] dump_stack_lvl+0x91/0xf0 [ 30.828192] print_report+0xcc/0x620 [ 30.828568] ? __virt_addr_valid+0x102/0x340 [ 30.828992] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829489] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829958] kasan_report+0xbe/0xf0 [ 30.830321] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830801] vma_interval_tree_remove+0xc75/0xec0 [ 30.831283] vma_prepare+0xc54/0x11a0 [ 30.831653] __split_vma+0x5af/0x950 [ 30.832018] ? __pfx___split_vma+0x10/0x10 [ 30.832306] ? find_held_lock+0x2c/0x110 [ 30.832599] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.832907] ? lock_is_held_type+0x9f/0x120 [ 30.833216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.833576] ? mtree_range_walk+0x632/0x900 [ 30.833899] ? mas_walk+0x5c7/0x7c0 [ 30.834186] do_vmi_munmap+0x1f1/0x2b0 [ 30.834482] mmap_region+0x1f9/0x2660 [ 30.834768] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.835066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.835496] ? __pfx_lock_acquire+0x10/0x10 [ 30.835803] ? __pfx_mmap_region+0x10/0x10 [ 30.836121] ? security_mmap_addr+0x7d/0xa0 [ 30.836441] ? get_unmapped_area+0x1f5/0x3f0 [ 30.836774] do_mmap+0x854/0xf00 [ 30.837037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.837334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.837668] ksys_mmap_pgoff+0x3af/0x500 [ 30.837967] do_syscall_64+0x3f/0x90 [ 30.838249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838631] RIP: 0033:0x7f3093ed4d82 [ 30.838901] 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 [ 30.840174] RSP: 002b:00007ffdd6f7c868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.840729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3093ed4d82 [ 30.841227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f309330e000 [ 30.841723] RBP: 00007f309330e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.842214] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556844903ec0 [ 30.842733] R13: 00007ffdd6f7c880 R14: 00007ffdd6f7c8b0 R15: 00007ffdd6f7cc10 [ 30.843251] [ 30.843426] [ 30.843555] Allocated by task 213: [ 30.843812] kasan_save_stack+0x22/0x50 [ 30.844107] kasan_set_track+0x25/0x30 [ 30.844402] __kasan_slab_alloc+0x59/0x70 [ 30.844710] kmem_cache_alloc+0x16b/0x370 [ 30.845018] vm_area_dup+0x20/0x160 [ 30.845291] __split_vma+0x170/0x950 [ 30.845572] split_vma+0xc6/0x110 [ 30.845831] mprotect_fixup+0x8d2/0xb30 [ 30.846115] do_mprotect_pkey+0x87e/0xd40 [ 30.846413] __x64_sys_mprotect+0x78/0xc0 [ 30.846724] do_syscall_64+0x3f/0x90 [ 30.847001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847390] [ 30.847516] Freed by task 0: [ 30.847730] kasan_save_stack+0x22/0x50 [ 30.848024] kasan_set_track+0x25/0x30 [ 30.848310] kasan_save_free_info+0x2b/0x50 [ 30.848630] __kasan_slab_free+0x10a/0x190 [ 30.848942] kmem_cache_free+0x10d/0x4d0 [ 30.849237] rcu_core+0x8c8/0x2860 [ 30.849498] __do_softirq+0x1b7/0x7d4 [ 30.849780] [ 30.849903] Last potentially related work creation: [ 30.850252] kasan_save_stack+0x22/0x50 [ 30.850545] __kasan_record_aux_stack+0x8e/0xa0 [ 30.850886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.851270] remove_vma+0x139/0x170 [ 30.851538] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.851876] do_vmi_munmap+0x1f1/0x2b0 [ 30.852164] __vm_munmap+0x138/0x3a0 [ 30.852442] __x64_sys_munmap+0x59/0x80 [ 30.852732] do_syscall_64+0x3f/0x90 [ 30.853006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853390] [ 30.853517] The buggy address belongs to the object at ffff88801b862bc8 [ 30.853517] which belongs to the cache vm_area_struct of size 168 [ 30.854392] The buggy address is located 88 bytes inside of [ 30.854392] freed 168-byte region [ffff88801b862bc8, ffff88801b862c70) [ 30.855227] [ 30.855348] The buggy address belongs to the physical page: [ 30.855744] page:000000005121e310 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b862 [ 30.856411] memcg:ffff88800f303801 [ 30.856670] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.857037] page_type: 0xffffffff() [ 30.857307] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.857855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f303801 [ 30.858395] page dumped because: kasan: bad access detected [ 30.858789] [ 30.858914] Memory state around the buggy address: [ 30.859263] ffff88801b862b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.859772] ffff88801b862b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.860260] >ffff88801b862c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.860769] ^ [ 30.861083] ffff88801b862c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.861590] ffff88801b862d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.862088] ================================================================== [ 30.862760] Disabling lock debugging due to kernel taint [ 32.394178] BUG: Bad rss-counter state mm:00000000fd42da86 type:MM_FILEPAGES val:33 [ 32.394752] BUG: Bad rss-counter state mm:00000000fd42da86 type:MM_ANONPAGES val:22 [ 32.853373] BUG: Bad rss-counter state mm:0000000001c47dcc type:MM_FILEPAGES val:33 [ 32.855086] BUG: Bad rss-counter state mm:0000000001c47dcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48219' (ECDSA) to the list of known hosts. 2023/06/21 06:41:10 fuzzer started 2023/06/21 06:41:10 dialing manager at localhost:36067 2023/06/21 06:41:10 checking machine... 2023/06/21 06:41:10 checking revisions... [ 33.472881] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:41:10 testing simple program... [ 33.560239] cgroup: Unknown subsys name 'net' [ 33.599848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd0c8871e40 CR3=000000000ec06000 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=cf7e81cc572f9089f14927bf8f7d04d5 XMM02=000000000011a7e8eff9b2d0a8fce9cb XMM03=000000000011a8b82c67c8bc2e329bc3 XMM04=b28cedfeaec3794300000000000ae988 XMM05=19e9129bd510f2350000000000131e80 XMM06=a82f6d5879a965850000000000130ce8 XMM07=e042d86d42eb936e0000000000122348 XMM08=26e92dbf0f471a76000000000011a8b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffff88800d84f540 RCX=ffff88800d84f000 RDX=0000000000000080 RSI=0000000000000130 RDI=ffffea00003613c0 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffffea00003f1840 R14=ffffffff813782f8 R15=ffff88800fc61c38 RIP=ffffffff8180efb6 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 00007fb2b83eb900 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=00007ffefb195000 CR3=000000001ab4e000 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=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