syzkaller login: [ 31.223828] BUG: Bad rss-counter state mm:00000000a29c651d type:MM_FILEPAGES val:33 [ 31.225545] BUG: Bad rss-counter state mm:00000000a29c651d type:MM_ANONPAGES val:22 [ 31.392270] ================================================================== [ 31.393344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.394257] Read of size 8 at addr ffff888016930798 by task sshd/219 [ 31.395283] [ 31.395540] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.396560] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.397736] Call Trace: [ 31.398047] [ 31.398322] dump_stack_lvl+0x91/0xf0 [ 31.398800] print_report+0xcc/0x620 [ 31.399274] ? __virt_addr_valid+0x102/0x340 [ 31.399818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400425] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401030] kasan_report+0xbe/0xf0 [ 31.401529] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402135] vma_interval_tree_remove+0xc75/0xec0 [ 31.402723] vma_prepare+0xc54/0x11a0 [ 31.403188] __split_vma+0x5af/0x950 [ 31.403647] ? __pfx___split_vma+0x10/0x10 [ 31.404148] ? find_held_lock+0x2c/0x110 [ 31.404662] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.405223] ? lock_is_held_type+0x9f/0x120 [ 31.405751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.406347] ? mtree_range_walk+0x632/0x900 [ 31.406889] ? mas_walk+0x5c7/0x7c0 [ 31.407352] do_vmi_munmap+0x1f1/0x2b0 [ 31.407834] mmap_region+0x1f9/0x2660 [ 31.408312] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.408810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.409546] ? __pfx_lock_acquire+0x10/0x10 [ 31.410073] ? __pfx_mmap_region+0x10/0x10 [ 31.410598] ? security_mmap_addr+0x7d/0xa0 [ 31.411118] ? get_unmapped_area+0x1f5/0x3f0 [ 31.411664] do_mmap+0x854/0xf00 [ 31.412085] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.412577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.413115] ksys_mmap_pgoff+0x3af/0x500 [ 31.413633] do_syscall_64+0x3f/0x90 [ 31.414103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.414734] RIP: 0033:0x7f0f88aa0d82 [ 31.415187] 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 [ 31.417282] RSP: 002b:00007ffe2e9bfce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.418170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f88aa0d82 [ 31.418996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f87eda000 [ 31.419825] RBP: 00007f0f87eda000 R08: 0000000000000009 R09: 0000000000001000 [ 31.420651] R10: 0000000000000812 R11: 0000000000000206 R12: 000056266aa56b20 [ 31.421495] R13: 00007ffe2e9bfd00 R14: 00007ffe2e9bfd30 R15: 00007ffe2e9c0090 [ 31.422303] [ 31.422583] [ 31.422788] Allocated by task 212: [ 31.423192] kasan_save_stack+0x22/0x50 [ 31.423671] kasan_set_track+0x25/0x30 [ 31.424154] __kasan_slab_alloc+0x59/0x70 [ 31.424669] kmem_cache_alloc+0x16b/0x370 [ 31.425179] vm_area_dup+0x20/0x160 [ 31.425623] __split_vma+0x170/0x950 [ 31.426068] split_vma+0xc6/0x110 [ 31.426496] mprotect_fixup+0x8d2/0xb30 [ 31.426986] do_mprotect_pkey+0x87e/0xd40 [ 31.427493] __x64_sys_mprotect+0x78/0xc0 [ 31.428000] do_syscall_64+0x3f/0x90 [ 31.428477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429100] [ 31.429338] Freed by task 13: [ 31.429712] kasan_save_stack+0x22/0x50 [ 31.430205] kasan_set_track+0x25/0x30 [ 31.430680] kasan_save_free_info+0x2b/0x50 [ 31.431194] __kasan_slab_free+0x10a/0x190 [ 31.431712] kmem_cache_free+0x10d/0x4d0 [ 31.432213] rcu_core+0x8c8/0x2860 [ 31.432644] __do_softirq+0x1b7/0x7d4 [ 31.433106] [ 31.433328] Last potentially related work creation: [ 31.433893] kasan_save_stack+0x22/0x50 [ 31.434385] __kasan_record_aux_stack+0x8e/0xa0 [ 31.434940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.435578] remove_vma+0x139/0x170 [ 31.436030] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.436569] do_vmi_munmap+0x1f1/0x2b0 [ 31.437037] __vm_munmap+0x138/0x3a0 [ 31.437501] __x64_sys_munmap+0x59/0x80 [ 31.437976] do_syscall_64+0x3f/0x90 [ 31.438443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439073] [ 31.439287] The buggy address belongs to the object at ffff888016930740 [ 31.439287] which belongs to the cache vm_area_struct of size 168 [ 31.440721] The buggy address is located 88 bytes inside of [ 31.440721] freed 168-byte region [ffff888016930740, ffff8880169307e8) [ 31.442101] [ 31.442317] The buggy address belongs to the physical page: [ 31.442956] page:00000000c46cf949 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16930 [ 31.444034] memcg:ffff888018d45101 [ 31.444444] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.445067] page_type: 0xffffffff() [ 31.445511] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.446403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d45101 [ 31.447290] page dumped because: kasan: bad access detected [ 31.447931] [ 31.448142] Memory state around the buggy address: [ 31.448705] ffff888016930680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.449546] ffff888016930700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.450371] >ffff888016930780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.451201] ^ [ 31.451675] ffff888016930800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.452497] ffff888016930880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.453308] ================================================================== [ 31.454245] Disabling lock debugging due to kernel taint [ 33.526355] BUG: Bad rss-counter state mm:00000000b77bfb3e type:MM_FILEPAGES val:33 [ 33.527538] BUG: Bad rss-counter state mm:00000000b77bfb3e type:MM_ANONPAGES val:22 [ 33.984609] BUG: Bad rss-counter state mm:00000000b68decb6 type:MM_FILEPAGES val:33 [ 33.985828] BUG: Bad rss-counter state mm:00000000b68decb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44878' (ECDSA) to the list of known hosts. 2023/06/20 14:50:03 fuzzer started 2023/06/20 14:50:03 dialing manager at localhost:36067 2023/06/20 14:50:03 checking machine... 2023/06/20 14:50:03 checking revisions... [ 34.527587] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:50:04 testing simple program... [ 34.558311] cgroup: Unknown subsys name 'net' [ 34.610908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:03 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=00007ffede7e5308 CR3=0000000005482000 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=00007f276ecca5100000560fbfe97790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d6ce8a RSP=ffff888016b67440 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000009a8000009a8 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f1811e9d900 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=00007f1812454618 CR3=0000000019ff2000 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