syzkaller login: [ 30.604908] BUG: Bad rss-counter state mm:000000002f56f675 type:MM_FILEPAGES val:33 [ 30.606600] BUG: Bad rss-counter state mm:000000002f56f675 type:MM_ANONPAGES val:22 [ 30.776814] ================================================================== [ 30.777765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778705] Read of size 8 at addr ffff888017e51968 by task sshd/220 [ 30.779475] [ 30.779699] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.780690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781707] Call Trace: [ 30.782029] [ 30.782349] dump_stack_lvl+0x91/0xf0 [ 30.782860] print_report+0xcc/0x620 [ 30.783359] ? __virt_addr_valid+0x102/0x340 [ 30.783908] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785163] kasan_report+0xbe/0xf0 [ 30.785652] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786273] vma_interval_tree_remove+0xc75/0xec0 [ 30.786867] vma_prepare+0xc54/0x11a0 [ 30.787344] __split_vma+0x5af/0x950 [ 30.787827] ? __pfx___split_vma+0x10/0x10 [ 30.788355] ? find_held_lock+0x2c/0x110 [ 30.788874] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.789452] ? lock_is_held_type+0x9f/0x120 [ 30.789996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.790603] ? mtree_range_walk+0x632/0x900 [ 30.791161] ? mas_walk+0x5c7/0x7c0 [ 30.791651] do_vmi_munmap+0x1f1/0x2b0 [ 30.792140] mmap_region+0x1f9/0x2660 [ 30.792627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.793138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.793866] ? __pfx_lock_acquire+0x10/0x10 [ 30.794399] ? __pfx_mmap_region+0x10/0x10 [ 30.794928] ? security_mmap_addr+0x7d/0xa0 [ 30.795460] ? get_unmapped_area+0x1f5/0x3f0 [ 30.796012] do_mmap+0x854/0xf00 [ 30.796455] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.797524] ksys_mmap_pgoff+0x3af/0x500 [ 30.798027] do_syscall_64+0x3f/0x90 [ 30.798517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799167] RIP: 0033:0x7fa2bc94cd82 [ 30.799635] 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 [ 30.801768] RSP: 002b:00007ffe2e0e6298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.802672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2bc94cd82 [ 30.803521] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2bbd86000 [ 30.804368] RBP: 00007fa2bbd86000 R08: 0000000000000009 R09: 0000000000001000 [ 30.805209] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ddd37eec0 [ 30.806056] R13: 00007ffe2e0e62b0 R14: 00007ffe2e0e62e0 R15: 00007ffe2e0e6640 [ 30.806907] [ 30.807203] [ 30.807421] Allocated by task 213: [ 30.807854] kasan_save_stack+0x22/0x50 [ 30.808360] kasan_set_track+0x25/0x30 [ 30.808851] __kasan_slab_alloc+0x59/0x70 [ 30.809395] kmem_cache_alloc+0x16b/0x370 [ 30.809916] vm_area_dup+0x20/0x160 [ 30.810368] __split_vma+0x170/0x950 [ 30.810836] split_vma+0xc6/0x110 [ 30.811278] mprotect_fixup+0x8d2/0xb30 [ 30.811781] do_mprotect_pkey+0x87e/0xd40 [ 30.812300] __x64_sys_mprotect+0x78/0xc0 [ 30.812819] do_syscall_64+0x3f/0x90 [ 30.813306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813948] [ 30.814168] Freed by task 213: [ 30.814561] kasan_save_stack+0x22/0x50 [ 30.815069] kasan_set_track+0x25/0x30 [ 30.815575] kasan_save_free_info+0x2b/0x50 [ 30.816106] __kasan_slab_free+0x10a/0x190 [ 30.816643] kmem_cache_free+0x10d/0x4d0 [ 30.817151] rcu_core+0x8c8/0x2860 [ 30.817603] __do_softirq+0x1b7/0x7d4 [ 30.818081] [ 30.818296] Last potentially related work creation: [ 30.818879] kasan_save_stack+0x22/0x50 [ 30.819388] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820603] remove_vma+0x139/0x170 [ 30.821049] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821629] do_vmi_munmap+0x1f1/0x2b0 [ 30.822119] __vm_munmap+0x138/0x3a0 [ 30.822585] __x64_sys_munmap+0x59/0x80 [ 30.823078] do_syscall_64+0x3f/0x90 [ 30.823556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824209] [ 30.824427] The buggy address belongs to the object at ffff888017e51910 [ 30.824427] which belongs to the cache vm_area_struct of size 168 [ 30.825892] The buggy address is located 88 bytes inside of [ 30.825892] freed 168-byte region [ffff888017e51910, ffff888017e519b8) [ 30.827286] [ 30.827505] The buggy address belongs to the physical page: [ 30.828168] page:000000009cee4091 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e51 [ 30.829251] memcg:ffff8880169bae01 [ 30.829685] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830324] page_type: 0xffffffff() [ 30.830774] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169bae01 [ 30.832589] page dumped because: kasan: bad access detected [ 30.833251] [ 30.833491] Memory state around the buggy address: [ 30.834072] ffff888017e51800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.834927] ffff888017e51880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.835786] >ffff888017e51900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836635] ^ [ 30.837421] ffff888017e51980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.838269] ffff888017e51a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.839124] ================================================================== [ 30.840438] Disabling lock debugging due to kernel taint [ 32.612294] BUG: Bad rss-counter state mm:00000000d87f3da9 type:MM_FILEPAGES val:33 [ 32.613482] BUG: Bad rss-counter state mm:00000000d87f3da9 type:MM_ANONPAGES val:22 [ 33.093297] BUG: Bad rss-counter state mm:00000000d56f60a6 type:MM_FILEPAGES val:33 [ 33.094385] BUG: Bad rss-counter state mm:00000000d56f60a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58876' (ECDSA) to the list of known hosts. 2023/06/20 16:48:47 fuzzer started 2023/06/20 16:48:47 dialing manager at localhost:36067 2023/06/20 16:48:47 checking machine... 2023/06/20 16:48:47 checking revisions... [ 33.749198] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:48:48 testing simple program... [ 33.820620] cgroup: Unknown subsys name 'net' [ 33.884165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:47 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff836808b8 RDX=0000000000026808 RSI=0000000000026808 RDI=ffffffff86583a10 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b8ed R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 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 00007f9be9c5c900 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=00007ffdaed3af28 CR3=000000000d67a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=40861253c69f8a6000000000000ae988 XMM05=1319e678c5640f8a00000000001332e0 XMM06=94aac670ef06ff650000000000133248 XMM07=58f17c1affdc82d60000000000123948 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001f454ad RSI=0000000000000008 RDI=ffff88800fa2a568 RBP=ffff88800fa2a560 RSP=ffff88801c4d7570 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=ffff88801c4d7728 R15=ffff888016712c80 RIP=ffffffff812e0685 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 00007f0743b4b900 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=00007ffc85cf6000 CR3=000000000ed0c000 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