syzkaller login: [ 31.203670] BUG: Bad rss-counter state mm:000000004a643e20 type:MM_FILEPAGES val:33 [ 31.204933] BUG: Bad rss-counter state mm:000000004a643e20 type:MM_ANONPAGES val:22 [ 31.349882] ================================================================== [ 31.350798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.351744] Read of size 8 at addr ffff888016e4e140 by task sshd/221 [ 31.352635] [ 31.352858] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.353738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.354718] Call Trace: [ 31.355039] [ 31.355327] dump_stack_lvl+0x91/0xf0 [ 31.355822] print_report+0xcc/0x620 [ 31.356307] ? __virt_addr_valid+0x102/0x340 [ 31.356870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358117] kasan_report+0xbe/0xf0 [ 31.358596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359226] vma_interval_tree_remove+0xc75/0xec0 [ 31.359835] vma_prepare+0xc54/0x11a0 [ 31.360311] __split_vma+0x5af/0x950 [ 31.360800] ? __pfx___split_vma+0x10/0x10 [ 31.361360] ? find_held_lock+0x2c/0x110 [ 31.361885] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.362450] ? lock_is_held_type+0x9f/0x120 [ 31.362993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.363601] ? mtree_range_walk+0x632/0x900 [ 31.364156] ? mas_walk+0x5c7/0x7c0 [ 31.364638] do_vmi_munmap+0x1f1/0x2b0 [ 31.365138] mmap_region+0x1f9/0x2660 [ 31.365619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.366137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.366864] ? __pfx_lock_acquire+0x10/0x10 [ 31.367396] ? __pfx_mmap_region+0x10/0x10 [ 31.367938] ? security_mmap_addr+0x7d/0xa0 [ 31.368481] ? get_unmapped_area+0x1f5/0x3f0 [ 31.369053] do_mmap+0x854/0xf00 [ 31.369499] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.370005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.370573] ksys_mmap_pgoff+0x3af/0x500 [ 31.371092] do_syscall_64+0x3f/0x90 [ 31.371574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372217] RIP: 0033:0x7fe89d519d82 [ 31.372681] 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 [ 31.374844] RSP: 002b:00007ffd8029b188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.375768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe89d519d82 [ 31.376635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe89c953000 [ 31.377557] RBP: 00007fe89c953000 R08: 0000000000000009 R09: 0000000000001000 [ 31.378447] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624074f0b20 [ 31.379307] R13: 00007ffd8029b1a0 R14: 00007ffd8029b1d0 R15: 00007ffd8029b530 [ 31.380167] [ 31.380459] [ 31.380674] Allocated by task 214: [ 31.381135] kasan_save_stack+0x22/0x50 [ 31.381648] kasan_set_track+0x25/0x30 [ 31.382146] __kasan_slab_alloc+0x59/0x70 [ 31.382673] kmem_cache_alloc+0x16b/0x370 [ 31.383188] vm_area_dup+0x20/0x160 [ 31.383643] __split_vma+0x170/0x950 [ 31.384107] split_vma+0xc6/0x110 [ 31.384546] mprotect_fixup+0x8d2/0xb30 [ 31.385053] do_mprotect_pkey+0x87e/0xd40 [ 31.385574] __x64_sys_mprotect+0x78/0xc0 [ 31.386104] do_syscall_64+0x3f/0x90 [ 31.386582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387233] [ 31.387445] Freed by task 214: [ 31.387845] kasan_save_stack+0x22/0x50 [ 31.388353] kasan_set_track+0x25/0x30 [ 31.388860] kasan_save_free_info+0x2b/0x50 [ 31.389403] __kasan_slab_free+0x10a/0x190 [ 31.389946] kmem_cache_free+0x10d/0x4d0 [ 31.390460] rcu_core+0x8c8/0x2860 [ 31.390902] __do_softirq+0x1b7/0x7d4 [ 31.391379] [ 31.391594] Last potentially related work creation: [ 31.392183] kasan_save_stack+0x22/0x50 [ 31.392686] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.393952] remove_vma+0x139/0x170 [ 31.394405] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.394963] do_vmi_munmap+0x1f1/0x2b0 [ 31.395455] __vm_munmap+0x138/0x3a0 [ 31.395924] __x64_sys_munmap+0x59/0x80 [ 31.396427] do_syscall_64+0x3f/0x90 [ 31.396912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397564] [ 31.397782] The buggy address belongs to the object at ffff888016e4e0e8 [ 31.397782] which belongs to the cache vm_area_struct of size 168 [ 31.399257] The buggy address is located 88 bytes inside of [ 31.399257] freed 168-byte region [ffff888016e4e0e8, ffff888016e4e190) [ 31.400665] [ 31.400880] The buggy address belongs to the physical page: [ 31.401557] page:000000003aa2449b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e4e [ 31.402660] memcg:ffff88800cfddc01 [ 31.403121] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.403819] page_type: 0xffffffff() [ 31.404299] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.405309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfddc01 [ 31.406286] page dumped because: kasan: bad access detected [ 31.407000] [ 31.407229] Memory state around the buggy address: [ 31.407855] ffff888016e4e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.408774] ffff888016e4e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.409707] >ffff888016e4e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410584] ^ [ 31.411220] ffff888016e4e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.412089] ffff888016e4e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.412965] ================================================================== [ 31.413939] Disabling lock debugging due to kernel taint [ 33.481644] BUG: Bad rss-counter state mm:000000004d36fc66 type:MM_FILEPAGES val:33 [ 33.482837] BUG: Bad rss-counter state mm:000000004d36fc66 type:MM_ANONPAGES val:22 [ 34.024006] BUG: Bad rss-counter state mm:000000008b12268c type:MM_FILEPAGES val:33 [ 34.025227] BUG: Bad rss-counter state mm:000000008b12268c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5191' (ECDSA) to the list of known hosts. 2023/06/21 01:10:22 fuzzer started 2023/06/21 01:10:22 dialing manager at localhost:36067 2023/06/21 01:10:22 checking machine... 2023/06/21 01:10:22 checking revisions... [ 34.714189] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:10:22 testing simple program... [ 34.759141] cgroup: Unknown subsys name 'net' [ 34.802773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:22 Registers: info registers vcpu 0 RAX=ffff8880146e77a0 RBX=ffff88800fed2298 RCX=1ffff110028dceeb RDX=0000000000000001 RSI=0000000000000003 RDI=ffff88800fed2298 RBP=ffff88800fed2298 RSP=ffff8880146e7728 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000003 R15=0000000000000003 RIP=ffffffff84535d0b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54cf2d6900 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=00007f54ce752630 CR3=000000000d622000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9e7daea3d4be873300000000000ae988 XMM05=6389b9891fdff68c00000000001327f0 XMM06=e4cb8bb95a7664b60000000000131938 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f5b70c0 RCX=0000000000000000 RDX=ffff888015d1b680 RSI=ffffffff818e8884 RDI=0000000000000005 RBP=0000000000000009 RSP=ffff888019f37ea8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f5b7120 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84538a40 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 00007f64ca3ec900 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=00007f64ca9a3618 CR3=000000001032a000 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=563412feff00545000000000000080fe 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