syzkaller login: [ 34.251668] BUG: Bad rss-counter state mm:000000003379572b type:MM_FILEPAGES val:33 [ 34.252580] BUG: Bad rss-counter state mm:000000003379572b type:MM_ANONPAGES val:22 [ 34.421002] ================================================================== [ 34.422103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.423376] Read of size 8 at addr ffff88801457cdf0 by task sshd/220 [ 34.424178] [ 34.424395] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.425259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.426269] Call Trace: [ 34.426594] [ 34.426881] dump_stack_lvl+0x91/0xf0 [ 34.427381] print_report+0xcc/0x620 [ 34.427871] ? __virt_addr_valid+0x102/0x340 [ 34.428436] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.429074] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.429698] kasan_report+0xbe/0xf0 [ 34.430187] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.430829] vma_interval_tree_remove+0xc75/0xec0 [ 34.431452] vma_prepare+0xc54/0x11a0 [ 34.431948] __split_vma+0x5af/0x950 [ 34.432433] ? __pfx___split_vma+0x10/0x10 [ 34.432978] ? find_held_lock+0x2c/0x110 [ 34.433505] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.434098] ? lock_is_held_type+0x9f/0x120 [ 34.434639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.435259] ? mtree_range_walk+0x632/0x900 [ 34.435827] ? mas_walk+0x5c7/0x7c0 [ 34.436308] do_vmi_munmap+0x1f1/0x2b0 [ 34.436807] mmap_region+0x1f9/0x2660 [ 34.437293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.437813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.438546] ? __pfx_lock_acquire+0x10/0x10 [ 34.439086] ? __pfx_mmap_region+0x10/0x10 [ 34.439630] ? security_mmap_addr+0x7d/0xa0 [ 34.440168] ? get_unmapped_area+0x1f5/0x3f0 [ 34.440729] do_mmap+0x854/0xf00 [ 34.441182] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.441691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.442271] ksys_mmap_pgoff+0x3af/0x500 [ 34.442786] do_syscall_64+0x3f/0x90 [ 34.443276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.443945] RIP: 0033:0x7f0b8493dd82 [ 34.444414] 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 [ 34.446632] RSP: 002b:00007ffe5a28eee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.447563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b8493dd82 [ 34.448431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b83d77000 [ 34.449298] RBP: 00007f0b83d77000 R08: 0000000000000009 R09: 0000000000001000 [ 34.450188] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dca4ed0f70 [ 34.451051] R13: 00007ffe5a28ef00 R14: 00007ffe5a28ef30 R15: 00007ffe5a28f290 [ 34.451916] [ 34.452219] [ 34.452439] Allocated by task 213: [ 34.452875] kasan_save_stack+0x22/0x50 [ 34.453381] kasan_set_track+0x25/0x30 [ 34.453887] __kasan_slab_alloc+0x59/0x70 [ 34.454415] kmem_cache_alloc+0x16b/0x370 [ 34.454941] vm_area_dup+0x20/0x160 [ 34.455395] __split_vma+0x170/0x950 [ 34.455865] split_vma+0xc6/0x110 [ 34.456303] mprotect_fixup+0x8d2/0xb30 [ 34.456808] do_mprotect_pkey+0x87e/0xd40 [ 34.457337] __x64_sys_mprotect+0x78/0xc0 [ 34.457883] do_syscall_64+0x3f/0x90 [ 34.458364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.459004] [ 34.459217] Freed by task 213: [ 34.459616] kasan_save_stack+0x22/0x50 [ 34.460125] kasan_set_track+0x25/0x30 [ 34.460632] kasan_save_free_info+0x2b/0x50 [ 34.461164] __kasan_slab_free+0x10a/0x190 [ 34.461704] kmem_cache_free+0x10d/0x4d0 [ 34.462227] rcu_core+0x8c8/0x2860 [ 34.462676] __do_softirq+0x1b7/0x7d4 [ 34.463158] [ 34.463375] Last potentially related work creation: [ 34.463971] kasan_save_stack+0x22/0x50 [ 34.464473] __kasan_record_aux_stack+0x8e/0xa0 [ 34.465046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.465695] remove_vma+0x139/0x170 [ 34.466159] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.466718] do_vmi_munmap+0x1f1/0x2b0 [ 34.467202] __vm_munmap+0x138/0x3a0 [ 34.467667] __x64_sys_munmap+0x59/0x80 [ 34.468168] do_syscall_64+0x3f/0x90 [ 34.468645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.469293] [ 34.469511] The buggy address belongs to the object at ffff88801457cd98 [ 34.469511] which belongs to the cache vm_area_struct of size 168 [ 34.471026] The buggy address is located 88 bytes inside of [ 34.471026] freed 168-byte region [ffff88801457cd98, ffff88801457ce40) [ 34.472422] [ 34.472637] The buggy address belongs to the physical page: [ 34.473312] page:000000006fc8d063 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1457c [ 34.474413] memcg:ffff88800df14501 [ 34.474844] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.475494] page_type: 0xffffffff() [ 34.475945] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.476866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df14501 [ 34.477771] page dumped because: kasan: bad access detected [ 34.478453] [ 34.478680] Memory state around the buggy address: [ 34.479265] ffff88801457cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.480123] ffff88801457cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.480982] >ffff88801457cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.481848] ^ [ 34.482660] ffff88801457ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.483522] ffff88801457ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.484378] ================================================================== [ 34.485522] Disabling lock debugging due to kernel taint [ 37.311299] BUG: Bad rss-counter state mm:00000000740b7af8 type:MM_FILEPAGES val:33 [ 37.312151] BUG: Bad rss-counter state mm:00000000740b7af8 type:MM_ANONPAGES val:22 [ 37.769146] BUG: Bad rss-counter state mm:00000000e685cc95 type:MM_FILEPAGES val:33 [ 37.770407] BUG: Bad rss-counter state mm:00000000e685cc95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58678' (ECDSA) to the list of known hosts. 2023/06/19 13:18:55 fuzzer started 2023/06/19 13:18:56 dialing manager at localhost:44161 2023/06/19 13:18:56 checking machine... 2023/06/19 13:18:56 checking revisions... [ 38.477261] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:18:56 testing simple program... [ 38.531349] cgroup: Unknown subsys name 'net' [ 38.578953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff8880146f9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880167f7518 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800e512e40 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f7779c4e900 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=00007f777a203650 CR3=0000000016d9e000 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=0000000000000003 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307c2 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 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=00007fd89a80ce20 CR3=000000000f37a000 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=2035353a38313a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38313a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000