syzkaller login: [ 31.332360] BUG: Bad rss-counter state mm:00000000104e8683 type:MM_FILEPAGES val:33 [ 31.333582] BUG: Bad rss-counter state mm:00000000104e8683 type:MM_ANONPAGES val:22 [ 31.373792] ================================================================== [ 31.374820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.375874] Read of size 8 at addr ffff88801a339968 by task sshd/220 [ 31.376760] [ 31.377039] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.377963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.379122] Call Trace: [ 31.379444] [ 31.379789] dump_stack_lvl+0x91/0xf0 [ 31.380302] print_report+0xcc/0x620 [ 31.380788] ? __virt_addr_valid+0x102/0x340 [ 31.381499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382132] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382754] kasan_report+0xbe/0xf0 [ 31.383246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383894] vma_interval_tree_remove+0xc75/0xec0 [ 31.384516] vma_prepare+0xc54/0x11a0 [ 31.384995] __split_vma+0x5af/0x950 [ 31.385475] ? __pfx___split_vma+0x10/0x10 [ 31.386008] ? find_held_lock+0x2c/0x110 [ 31.386547] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.387156] ? lock_is_held_type+0x9f/0x120 [ 31.387713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.388335] ? mtree_range_walk+0x632/0x900 [ 31.388894] ? mas_walk+0x5c7/0x7c0 [ 31.389377] do_vmi_munmap+0x1f1/0x2b0 [ 31.389876] mmap_region+0x1f9/0x2660 [ 31.390367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.390881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.391624] ? __pfx_lock_acquire+0x10/0x10 [ 31.392164] ? __pfx_mmap_region+0x10/0x10 [ 31.392702] ? security_mmap_addr+0x7d/0xa0 [ 31.393230] ? get_unmapped_area+0x1f5/0x3f0 [ 31.393790] do_mmap+0x854/0xf00 [ 31.394235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.394745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.395326] ksys_mmap_pgoff+0x3af/0x500 [ 31.395844] do_syscall_64+0x3f/0x90 [ 31.396321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.396976] RIP: 0033:0x7fe806c02d82 [ 31.397436] 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 [ 31.399612] RSP: 002b:00007fff8924c968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.400526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe806c02d82 [ 31.401398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe80603c000 [ 31.402252] RBP: 00007fe80603c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.403117] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb2b92fec0 [ 31.404012] R13: 00007fff8924c980 R14: 00007fff8924c9b0 R15: 00007fff8924cd10 [ 31.404895] [ 31.405185] [ 31.405403] Allocated by task 213: [ 31.405833] kasan_save_stack+0x22/0x50 [ 31.406346] kasan_set_track+0x25/0x30 [ 31.406838] __kasan_slab_alloc+0x59/0x70 [ 31.407395] kmem_cache_alloc+0x16b/0x370 [ 31.407913] vm_area_dup+0x20/0x160 [ 31.408370] __split_vma+0x170/0x950 [ 31.408836] split_vma+0xc6/0x110 [ 31.409288] mprotect_fixup+0x8d2/0xb30 [ 31.409800] do_mprotect_pkey+0x87e/0xd40 [ 31.410319] __x64_sys_mprotect+0x78/0xc0 [ 31.410843] do_syscall_64+0x3f/0x90 [ 31.411326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411982] [ 31.412204] Freed by task 213: [ 31.412599] kasan_save_stack+0x22/0x50 [ 31.413112] kasan_set_track+0x25/0x30 [ 31.413611] kasan_save_free_info+0x2b/0x50 [ 31.414156] __kasan_slab_free+0x10a/0x190 [ 31.414760] kmem_cache_free+0x10d/0x4d0 [ 31.415308] rcu_core+0x8c8/0x2860 [ 31.415751] __do_softirq+0x1b7/0x7d4 [ 31.416223] [ 31.416439] Last potentially related work creation: [ 31.417032] kasan_save_stack+0x22/0x50 [ 31.417535] __kasan_record_aux_stack+0x8e/0xa0 [ 31.418107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.418761] remove_vma+0x139/0x170 [ 31.419216] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.419791] do_vmi_munmap+0x1f1/0x2b0 [ 31.420283] __vm_munmap+0x138/0x3a0 [ 31.420764] __x64_sys_munmap+0x59/0x80 [ 31.421276] do_syscall_64+0x3f/0x90 [ 31.421756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.422403] [ 31.422618] The buggy address belongs to the object at ffff88801a339910 [ 31.422618] which belongs to the cache vm_area_struct of size 168 [ 31.424174] The buggy address is located 88 bytes inside of [ 31.424174] freed 168-byte region [ffff88801a339910, ffff88801a3399b8) [ 31.425643] [ 31.425864] The buggy address belongs to the physical page: [ 31.426580] page:00000000feb3f688 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a339 [ 31.427833] memcg:ffff888010141e01 [ 31.428262] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.428927] page_type: 0xffffffff() [ 31.429395] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.430320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010141e01 [ 31.431274] page dumped because: kasan: bad access detected [ 31.431942] [ 31.432183] Memory state around the buggy address: [ 31.432821] ffff88801a339800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.433687] ffff88801a339880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.434596] >ffff88801a339900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.435492] ^ [ 31.436281] ffff88801a339980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.437167] ffff88801a339a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.438053] ================================================================== [ 31.439037] Disabling lock debugging due to kernel taint [ 33.738360] BUG: Bad rss-counter state mm:00000000ac8cbc93 type:MM_FILEPAGES val:33 [ 33.739381] BUG: Bad rss-counter state mm:00000000ac8cbc93 type:MM_ANONPAGES val:22 [ 34.311163] BUG: Bad rss-counter state mm:00000000f29a8ee2 type:MM_FILEPAGES val:33 [ 34.312371] BUG: Bad rss-counter state mm:00000000f29a8ee2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44963' (ECDSA) to the list of known hosts. 2023/06/20 01:37:38 fuzzer started 2023/06/20 01:37:39 dialing manager at localhost:44161 2023/06/20 01:37:39 checking machine... 2023/06/20 01:37:39 checking revisions... [ 34.939555] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:37:39 testing simple program... [ 34.985079] cgroup: Unknown subsys name 'net' [ 35.016188] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:38 Registers: info registers vcpu 0 RAX=1ffff1100341611d RBX=ffff88801a0b08b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a0b08e8 RBP=ffff88800e49ec00 RSP=ffff8880141d7788 R8 =0000000000000001 R9 =ffffed100283aee5 R10=0000000000000003 R11=00000000002a0029 R12=dffffc0000000000 R13=ffff88800e49cc00 R14=ffffffff81802eb3 R15=00000000802a0027 RIP=ffffffff81846362 RFL=00000046 [---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 00007f621f036900 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=00007f621e4ab0d0 CR3=000000001038e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5872f186df15e7ea00000000000ae988 XMM05=f54da9579c4703cb0000000000136050 XMM06=b9f40689d3062a330000000000134df0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4f19 RBX=ffffffff85fa78c8 RCX=ffffffff83684ee5 RDX=0000000000000000 RSI=ffffffff863b7b2e RDI=ffffffff85fa78c0 RBP=ffffffff85fa78c0 RSP=ffff88801a2b74c8 R8 =ffffffff863b7b2e R9 =ffff88801a2b75c0 R10=0000000000038001 R11=000000000008b93b R12=ffffffff85fa78d0 R13=ffffffff85fa78c0 R14=ffffffff85fa78c0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f6bff1e1900 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=00007f6bff798618 CR3=000000001a2b8000 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