syzkaller login: [ 72.815686] BUG: Bad rss-counter state mm:00000000c0b11726 type:MM_FILEPAGES val:33 [ 72.817054] BUG: Bad rss-counter state mm:00000000c0b11726 type:MM_ANONPAGES val:22 [ 72.955966] ================================================================== [ 72.956858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.957793] Read of size 8 at addr ffff88800e93fed8 by task sshd/219 [ 72.958561] [ 72.958906] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.959932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.960888] Call Trace: [ 72.961233] [ 72.961520] dump_stack_lvl+0x91/0xf0 [ 72.962000] print_report+0xcc/0x620 [ 72.962479] ? __virt_addr_valid+0x102/0x340 [ 72.963044] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.963649] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.964262] kasan_report+0xbe/0xf0 [ 72.964740] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.965358] vma_interval_tree_remove+0xc75/0xec0 [ 72.965960] vma_prepare+0xc54/0x11a0 [ 72.966434] __split_vma+0x5af/0x950 [ 72.966920] ? __pfx___split_vma+0x10/0x10 [ 72.967453] ? find_held_lock+0x2c/0x110 [ 72.967973] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.968529] ? lock_is_held_type+0x9f/0x120 [ 72.969060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.969656] ? mtree_range_walk+0x632/0x900 [ 72.970206] ? mas_walk+0x5c7/0x7c0 [ 72.970696] do_vmi_munmap+0x1f1/0x2b0 [ 72.971183] mmap_region+0x1f9/0x2660 [ 72.971666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.972176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.972875] ? __pfx_lock_acquire+0x10/0x10 [ 72.973407] ? __pfx_mmap_region+0x10/0x10 [ 72.973937] ? security_mmap_addr+0x7d/0xa0 [ 72.974457] ? get_unmapped_area+0x1f5/0x3f0 [ 72.975019] do_mmap+0x854/0xf00 [ 72.975450] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.975935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.976490] ksys_mmap_pgoff+0x3af/0x500 [ 72.976995] do_syscall_64+0x3f/0x90 [ 72.977477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.978112] RIP: 0033:0x7fbe19ae2d82 [ 72.978573] 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 [ 72.980676] RSP: 002b:00007fffb5854cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.981574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe19ae2d82 [ 72.982430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe18f1c000 [ 72.983274] RBP: 00007fbe18f1c000 R08: 0000000000000009 R09: 0000000000001000 [ 72.984110] R10: 0000000000000812 R11: 0000000000000206 R12: 000056511b170ec0 [ 72.984959] R13: 00007fffb5854d10 R14: 00007fffb5854d40 R15: 00007fffb58550a0 [ 72.985813] [ 72.986100] [ 72.986314] Allocated by task 212: [ 72.986752] kasan_save_stack+0x22/0x50 [ 72.987250] kasan_set_track+0x25/0x30 [ 72.987741] __kasan_slab_alloc+0x59/0x70 [ 72.988267] kmem_cache_alloc+0x16b/0x370 [ 72.988777] vm_area_dup+0x20/0x160 [ 72.989234] __split_vma+0x170/0x950 [ 72.989696] split_vma+0xc6/0x110 [ 72.990133] mprotect_fixup+0x8d2/0xb30 [ 72.990644] do_mprotect_pkey+0x87e/0xd40 [ 72.991154] __x64_sys_mprotect+0x78/0xc0 [ 72.991670] do_syscall_64+0x3f/0x90 [ 72.992134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.992765] [ 72.992979] Freed by task 212: [ 72.993369] kasan_save_stack+0x22/0x50 [ 72.993870] kasan_set_track+0x25/0x30 [ 72.994356] kasan_save_free_info+0x2b/0x50 [ 72.994894] __kasan_slab_free+0x10a/0x190 [ 72.995426] kmem_cache_free+0x10d/0x4d0 [ 72.995928] rcu_core+0x8c8/0x2860 [ 72.996367] __do_softirq+0x1b7/0x7d4 [ 72.996833] [ 72.997045] Last potentially related work creation: [ 72.997619] kasan_save_stack+0x22/0x50 [ 72.998112] __kasan_record_aux_stack+0x8e/0xa0 [ 72.998684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.999323] remove_vma+0x139/0x170 [ 72.999814] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.000388] do_vmi_munmap+0x1f1/0x2b0 [ 73.000870] __vm_munmap+0x138/0x3a0 [ 73.001329] __x64_sys_munmap+0x59/0x80 [ 73.001818] do_syscall_64+0x3f/0x90 [ 73.002288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.002939] [ 73.003150] The buggy address belongs to the object at ffff88800e93fe80 [ 73.003150] which belongs to the cache vm_area_struct of size 168 [ 73.004593] The buggy address is located 88 bytes inside of [ 73.004593] freed 168-byte region [ffff88800e93fe80, ffff88800e93ff28) [ 73.005991] [ 73.006202] The buggy address belongs to the physical page: [ 73.006859] page:00000000b7ca726f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe93f [ 73.007938] memcg:ffff88800ea5f001 [ 73.008364] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 73.009050] page_type: 0xffffffff() [ 73.009502] raw: 0100000000000200 ffff88800879fc80 ffffea00003a8480 dead000000000003 [ 73.010409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea5f001 [ 73.011316] page dumped because: kasan: bad access detected [ 73.011968] [ 73.012180] Memory state around the buggy address: [ 73.012756] ffff88800e93fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.013599] ffff88800e93fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 73.014443] >ffff88800e93fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.015302] ^ [ 73.016032] ffff88800e93ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 73.016880] ffff88800e93ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 73.017735] ================================================================== [ 73.018740] Disabling lock debugging due to kernel taint [ 74.921107] BUG: Bad rss-counter state mm:000000009a0f5caf type:MM_FILEPAGES val:33 [ 74.922014] BUG: Bad rss-counter state mm:000000009a0f5caf type:MM_ANONPAGES val:22 [ 75.389309] BUG: Bad rss-counter state mm:0000000087a3e9af type:MM_FILEPAGES val:33 [ 75.390342] BUG: Bad rss-counter state mm:0000000087a3e9af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28137' (ECDSA) to the list of known hosts. 2023/06/20 04:10:50 fuzzer started 2023/06/20 04:10:50 dialing manager at localhost:44161 2023/06/20 04:10:50 checking machine... 2023/06/20 04:10:50 checking revisions... [ 76.078919] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:10:50 testing simple program... [ 76.128976] cgroup: Unknown subsys name 'net' [ 76.195909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:10:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000607f92e15770 RCX=1ffffffff0ba7a02 RDX=0000000000000003 RSI=000000118b8c10f2 RDI=0000000000000000 RBP=ffff888015c97b88 RSP=ffff888015c97a58 R8 =ffff888015e6c0c0 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff8880160051c0 R14=ffff88801984d668 R15=ffff88801984d1c0 RIP=ffffffff84518070 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 00007f7dc20fd700 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=00007f52742240b0 CR3=00000000094c4000 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=2039343a30313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a30313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f728cc8f000 CR3=000000000d878000 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=0981dc78fc42dc8b0e4416835541d7d4 XMM02=2c67c8bc2e329bc30000000000123970 XMM03=fb795ef6d657705600000000001278f0 XMM04=ff1b893cfb2ae1c100000000000ae988 XMM05=dfcdbad4f1609c3700000000001377d8 XMM06=f72413b83bfc24c60000000000136248 XMM07=e042d86d42eb936e0000000000127b70 XMM08=b66f37b1cc7c9b2c00000000001239d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000