syzkaller login: [ 30.312083] BUG: Bad rss-counter state mm:000000003a211544 type:MM_FILEPAGES val:33 [ 30.313112] BUG: Bad rss-counter state mm:000000003a211544 type:MM_ANONPAGES val:22 [ 30.480158] ================================================================== [ 30.481100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.482037] Read of size 8 at addr ffff888016fde140 by task sshd/219 [ 30.482808] [ 30.483146] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.484036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.485039] Call Trace: [ 30.485390] [ 30.485679] dump_stack_lvl+0x91/0xf0 [ 30.486170] print_report+0xcc/0x620 [ 30.486658] ? __virt_addr_valid+0x102/0x340 [ 30.487215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.487831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.488463] kasan_report+0xbe/0xf0 [ 30.488943] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.489560] vma_interval_tree_remove+0xc75/0xec0 [ 30.490166] vma_prepare+0xc54/0x11a0 [ 30.490641] __split_vma+0x5af/0x950 [ 30.491108] ? __pfx___split_vma+0x10/0x10 [ 30.491654] ? find_held_lock+0x2c/0x110 [ 30.492173] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.492755] ? lock_is_held_type+0x9f/0x120 [ 30.493297] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.493897] ? mtree_range_walk+0x632/0x900 [ 30.494449] ? mas_walk+0x5c7/0x7c0 [ 30.494926] do_vmi_munmap+0x1f1/0x2b0 [ 30.495419] mmap_region+0x1f9/0x2660 [ 30.495898] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.496409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.497134] ? __pfx_lock_acquire+0x10/0x10 [ 30.497665] ? __pfx_mmap_region+0x10/0x10 [ 30.498195] ? security_mmap_addr+0x7d/0xa0 [ 30.498725] ? get_unmapped_area+0x1f5/0x3f0 [ 30.499271] do_mmap+0x854/0xf00 [ 30.499707] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.500200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.500768] ksys_mmap_pgoff+0x3af/0x500 [ 30.501270] do_syscall_64+0x3f/0x90 [ 30.501748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.502391] RIP: 0033:0x7fee56ba0d82 [ 30.502850] 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 [ 30.504960] RSP: 002b:00007ffed1b69248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.505861] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee56ba0d82 [ 30.506713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee55fda000 [ 30.507549] RBP: 00007fee55fda000 R08: 0000000000000009 R09: 0000000000001000 [ 30.508393] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e312f8ec0 [ 30.509245] R13: 00007ffed1b69260 R14: 00007ffed1b69290 R15: 00007ffed1b695f0 [ 30.510106] [ 30.510399] [ 30.510613] Allocated by task 212: [ 30.511041] kasan_save_stack+0x22/0x50 [ 30.511548] kasan_set_track+0x25/0x30 [ 30.512038] __kasan_slab_alloc+0x59/0x70 [ 30.512562] kmem_cache_alloc+0x16b/0x370 [ 30.513091] vm_area_dup+0x20/0x160 [ 30.513545] __split_vma+0x170/0x950 [ 30.514012] split_vma+0xc6/0x110 [ 30.514455] mprotect_fixup+0x8d2/0xb30 [ 30.514952] do_mprotect_pkey+0x87e/0xd40 [ 30.515471] __x64_sys_mprotect+0x78/0xc0 [ 30.515990] do_syscall_64+0x3f/0x90 [ 30.516461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.517108] [ 30.517326] Freed by task 212: [ 30.517710] kasan_save_stack+0x22/0x50 [ 30.518209] kasan_set_track+0x25/0x30 [ 30.518725] kasan_save_free_info+0x2b/0x50 [ 30.519268] __kasan_slab_free+0x10a/0x190 [ 30.519811] kmem_cache_free+0x10d/0x4d0 [ 30.520323] rcu_core+0x8c8/0x2860 [ 30.520771] __do_softirq+0x1b7/0x7d4 [ 30.521250] [ 30.521469] Last potentially related work creation: [ 30.522046] kasan_save_stack+0x22/0x50 [ 30.522557] __kasan_record_aux_stack+0x8e/0xa0 [ 30.523123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.523756] remove_vma+0x139/0x170 [ 30.524208] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.524892] do_vmi_munmap+0x1f1/0x2b0 [ 30.525388] __vm_munmap+0x138/0x3a0 [ 30.525849] __x64_sys_munmap+0x59/0x80 [ 30.526340] do_syscall_64+0x3f/0x90 [ 30.526809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.527448] [ 30.527662] The buggy address belongs to the object at ffff888016fde0e8 [ 30.527662] which belongs to the cache vm_area_struct of size 168 [ 30.529124] The buggy address is located 88 bytes inside of [ 30.529124] freed 168-byte region [ffff888016fde0e8, ffff888016fde190) [ 30.530507] [ 30.530722] The buggy address belongs to the physical page: [ 30.531386] page:0000000002f57d8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fde [ 30.532459] memcg:ffff888019f4a801 [ 30.532903] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.533538] page_type: 0xffffffff() [ 30.533984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.534903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f4a801 [ 30.535801] page dumped because: kasan: bad access detected [ 30.536464] [ 30.536680] Memory state around the buggy address: [ 30.537271] ffff888016fde000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.538133] ffff888016fde080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.538975] >ffff888016fde100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.539812] ^ [ 30.540446] ffff888016fde180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.541314] ffff888016fde200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.542159] ================================================================== [ 30.543064] Disabling lock debugging due to kernel taint [ 32.492991] BUG: Bad rss-counter state mm:000000006fb876be type:MM_FILEPAGES val:33 [ 32.493837] BUG: Bad rss-counter state mm:000000006fb876be type:MM_ANONPAGES val:22 [ 32.966005] BUG: Bad rss-counter state mm:0000000037a767fe type:MM_FILEPAGES val:33 [ 32.966991] BUG: Bad rss-counter state mm:0000000037a767fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47174' (ECDSA) to the list of known hosts. 2023/06/20 14:58:33 fuzzer started 2023/06/20 14:58:33 dialing manager at localhost:36067 2023/06/20 14:58:33 checking machine... 2023/06/20 14:58:33 checking revisions... [ 33.724060] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:58:33 testing simple program... [ 33.768313] cgroup: Unknown subsys name 'net' [ 33.805097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:58:33 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000009aecbfa1 RCX=ffff88806ca5fd08 RDX=0000000000000007 RSI=0000000000000002 RDI=000000007e8ffa04 RBP=ffff88800f9958f0 RSP=ffff8880168578d0 R8 =000000004db076da R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff888016857958 R15=0000000000000007 RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f2e4999d900 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=00007f2e49f550b0 CR3=000000000ef26000 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=ffffea000037bc80 RBX=ffff88800def2f60 RCX=ffff8880087a03c0 RDX=ffff88808def2f60 RSI=ffff88800daba060 RDI=ffff8880087a03c0 RBP=0000000000000000 RSP=ffff88800f0a7918 R8 =ffff88800def2f60 R9 =0000000000000000 R10=ffffea000036ae80 R11=00000000802a0001 R12=dffffc0000000000 R13=ffff88800f0a7958 R14=0000000000000000 R15=ffff88800daba060 RIP=ffffffff81810393 RFL=00000282 [--S----] 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 00007f7dea3cb700 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=00007f51849d96d0 CR3=000000000ff24000 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=2032333a38353a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a38353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000