syzkaller login: [ 30.246231] BUG: Bad rss-counter state mm:00000000f3070094 type:MM_FILEPAGES val:33 [ 30.246917] BUG: Bad rss-counter state mm:00000000f3070094 type:MM_ANONPAGES val:22 [ 30.398433] ================================================================== [ 30.399352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.400305] Read of size 8 at addr ffff88800e955df0 by task sshd/219 [ 30.401149] [ 30.401367] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.402250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.403240] Call Trace: [ 30.403608] [ 30.403902] dump_stack_lvl+0x91/0xf0 [ 30.404403] print_report+0xcc/0x620 [ 30.404894] ? __virt_addr_valid+0x102/0x340 [ 30.405455] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406695] kasan_report+0xbe/0xf0 [ 30.407182] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.407832] vma_interval_tree_remove+0xc75/0xec0 [ 30.408444] vma_prepare+0xc54/0x11a0 [ 30.408931] __split_vma+0x5af/0x950 [ 30.409414] ? __pfx___split_vma+0x10/0x10 [ 30.409937] ? find_held_lock+0x2c/0x110 [ 30.410465] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.411031] ? lock_is_held_type+0x9f/0x120 [ 30.411597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.412212] ? mtree_range_walk+0x632/0x900 [ 30.412764] ? mas_walk+0x5c7/0x7c0 [ 30.413245] do_vmi_munmap+0x1f1/0x2b0 [ 30.413736] mmap_region+0x1f9/0x2660 [ 30.414216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.414727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.415520] ? __pfx_lock_acquire+0x10/0x10 [ 30.416086] ? __pfx_mmap_region+0x10/0x10 [ 30.416615] ? security_mmap_addr+0x7d/0xa0 [ 30.417190] ? get_unmapped_area+0x1f5/0x3f0 [ 30.417754] do_mmap+0x854/0xf00 [ 30.418242] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.418744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.419370] ksys_mmap_pgoff+0x3af/0x500 [ 30.419941] do_syscall_64+0x3f/0x90 [ 30.420435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.421110] RIP: 0033:0x7fdac2627d82 [ 30.421568] 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 [ 30.423794] RSP: 002b:00007fff0817efb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.424698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdac2627d82 [ 30.425569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdac1a61000 [ 30.426414] RBP: 00007fdac1a61000 R08: 0000000000000009 R09: 0000000000001000 [ 30.427257] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562920341f70 [ 30.428149] R13: 00007fff0817efd0 R14: 00007fff0817f000 R15: 00007fff0817f360 [ 30.429001] [ 30.429296] [ 30.429514] Allocated by task 212: [ 30.429946] kasan_save_stack+0x22/0x50 [ 30.430453] kasan_set_track+0x25/0x30 [ 30.430945] __kasan_slab_alloc+0x59/0x70 [ 30.431505] kmem_cache_alloc+0x16b/0x370 [ 30.432022] vm_area_dup+0x20/0x160 [ 30.432477] __split_vma+0x170/0x950 [ 30.432942] split_vma+0xc6/0x110 [ 30.433382] mprotect_fixup+0x8d2/0xb30 [ 30.433914] do_mprotect_pkey+0x87e/0xd40 [ 30.434498] __x64_sys_mprotect+0x78/0xc0 [ 30.435032] do_syscall_64+0x3f/0x90 [ 30.435557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.436208] [ 30.436427] Freed by task 212: [ 30.436820] kasan_save_stack+0x22/0x50 [ 30.437332] kasan_set_track+0x25/0x30 [ 30.437831] kasan_save_free_info+0x2b/0x50 [ 30.438365] __kasan_slab_free+0x10a/0x190 [ 30.438897] kmem_cache_free+0x10d/0x4d0 [ 30.439432] rcu_core+0x8c8/0x2860 [ 30.439877] __do_softirq+0x1b7/0x7d4 [ 30.440363] [ 30.440585] Last potentially related work creation: [ 30.441168] kasan_save_stack+0x22/0x50 [ 30.441669] __kasan_record_aux_stack+0x8e/0xa0 [ 30.442258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.442902] remove_vma+0x139/0x170 [ 30.443384] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.443951] do_vmi_munmap+0x1f1/0x2b0 [ 30.444440] __vm_munmap+0x138/0x3a0 [ 30.444921] __x64_sys_munmap+0x59/0x80 [ 30.445418] do_syscall_64+0x3f/0x90 [ 30.445892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.446536] [ 30.446759] The buggy address belongs to the object at ffff88800e955d98 [ 30.446759] which belongs to the cache vm_area_struct of size 168 [ 30.448266] The buggy address is located 88 bytes inside of [ 30.448266] freed 168-byte region [ffff88800e955d98, ffff88800e955e40) [ 30.449674] [ 30.449899] The buggy address belongs to the physical page: [ 30.450566] page:000000004290ba17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe955 [ 30.451686] memcg:ffff8880101d9e01 [ 30.452108] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.452755] page_type: 0xffffffff() [ 30.453212] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.454135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101d9e01 [ 30.455041] page dumped because: kasan: bad access detected [ 30.455751] [ 30.455964] Memory state around the buggy address: [ 30.456544] ffff88800e955c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.457395] ffff88800e955d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.458248] >ffff88800e955d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.459114] ^ [ 30.459953] ffff88800e955e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.460818] ffff88800e955e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.461677] ================================================================== [ 30.462694] Disabling lock debugging due to kernel taint [ 32.912952] BUG: Bad rss-counter state mm:0000000016cedde3 type:MM_FILEPAGES val:33 [ 32.913876] BUG: Bad rss-counter state mm:0000000016cedde3 type:MM_ANONPAGES val:22 [ 33.382308] BUG: Bad rss-counter state mm:00000000a123f14c type:MM_FILEPAGES val:33 [ 33.383572] BUG: Bad rss-counter state mm:00000000a123f14c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29861' (ECDSA) to the list of known hosts. 2023/06/21 08:14:17 fuzzer started 2023/06/21 08:14:18 dialing manager at localhost:36067 2023/06/21 08:14:18 checking machine... 2023/06/21 08:14:18 checking revisions... [ 34.105754] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:14:18 testing simple program... [ 34.152365] cgroup: Unknown subsys name 'net' [ 34.188265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81f17502 RDX=ffff888016de9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800b638c98 RSP=ffff888015c2f480 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff11002b85e93 R15=0000000000000000 RIP=ffffffff814c0408 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 00007fd568a96900 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=00007fb995c24650 CR3=000000000c742000 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=b7c1c871cf4d81a000000000000ae988 XMM05=d770e85c8b9861a70000000000132680 XMM06=806171799158d9670000000000131470 XMM07=fb795ef6d657705600000000001217a0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100274df10 RSI=ffffffff8363b743 RDI=ffff888013a6f8f0 RBP=ffff888013a6f8c0 RSP=ffff888013a6f818 R8 =0000000000000001 R9 =ffff888013a6f868 R10=0000000000038001 R11=000000000008a966 R12=ffff888013a6f8f0 R13=0000000000000000 R14=ffff88800fc5b680 R15=0000000000092cc0 RIP=ffffffff813ad47f 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 00007fb99566f900 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=00007fb995c26618 CR3=000000000e9f8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000