syzkaller login: [ 30.292690] BUG: Bad rss-counter state mm:00000000e75385cd type:MM_FILEPAGES val:33 [ 30.293896] BUG: Bad rss-counter state mm:00000000e75385cd type:MM_ANONPAGES val:22 [ 30.447099] ================================================================== [ 30.448098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.449102] Read of size 8 at addr ffff88800b831310 by task sshd/220 [ 30.450031] [ 30.450263] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.451185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.452240] Call Trace: [ 30.452589] [ 30.452896] dump_stack_lvl+0x91/0xf0 [ 30.453414] print_report+0xcc/0x620 [ 30.453933] ? __virt_addr_valid+0x102/0x340 [ 30.454524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455829] kasan_report+0xbe/0xf0 [ 30.456331] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.457001] vma_interval_tree_remove+0xc75/0xec0 [ 30.457642] vma_prepare+0xc54/0x11a0 [ 30.458154] __split_vma+0x5af/0x950 [ 30.458661] ? __pfx___split_vma+0x10/0x10 [ 30.459220] ? find_held_lock+0x2c/0x110 [ 30.459774] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.460372] ? lock_is_held_type+0x9f/0x120 [ 30.460979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.461631] ? mtree_range_walk+0x632/0x900 [ 30.462220] ? mas_walk+0x5c7/0x7c0 [ 30.462730] do_vmi_munmap+0x1f1/0x2b0 [ 30.463261] mmap_region+0x1f9/0x2660 [ 30.463779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.464323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.465101] ? __pfx_lock_acquire+0x10/0x10 [ 30.465669] ? __pfx_mmap_region+0x10/0x10 [ 30.466243] ? security_mmap_addr+0x7d/0xa0 [ 30.466818] ? get_unmapped_area+0x1f5/0x3f0 [ 30.467401] do_mmap+0x854/0xf00 [ 30.467868] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.468405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.469010] ksys_mmap_pgoff+0x3af/0x500 [ 30.469544] do_syscall_64+0x3f/0x90 [ 30.470056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.470743] RIP: 0033:0x7fc83be83d82 [ 30.471227] 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 [ 30.473501] RSP: 002b:00007ffc06748918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.474461] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc83be83d82 [ 30.475364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc83b2bd000 [ 30.476264] RBP: 00007fc83b2bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.477163] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557eb39ffb20 [ 30.478064] R13: 00007ffc06748930 R14: 00007ffc06748960 R15: 00007ffc06748cc0 [ 30.478968] [ 30.479275] [ 30.479502] Allocated by task 213: [ 30.479961] kasan_save_stack+0x22/0x50 [ 30.480518] kasan_set_track+0x25/0x30 [ 30.481045] __kasan_slab_alloc+0x59/0x70 [ 30.481601] kmem_cache_alloc+0x16b/0x370 [ 30.482153] vm_area_dup+0x20/0x160 [ 30.482644] __split_vma+0x170/0x950 [ 30.483137] split_vma+0xc6/0x110 [ 30.483602] mprotect_fixup+0x8d2/0xb30 [ 30.484136] do_mprotect_pkey+0x87e/0xd40 [ 30.484710] __x64_sys_mprotect+0x78/0xc0 [ 30.485266] do_syscall_64+0x3f/0x90 [ 30.485769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486462] [ 30.486696] Freed by task 213: [ 30.487116] kasan_save_stack+0x22/0x50 [ 30.487653] kasan_set_track+0x25/0x30 [ 30.488176] kasan_save_free_info+0x2b/0x50 [ 30.488750] __kasan_slab_free+0x10a/0x190 [ 30.489328] kmem_cache_free+0x10d/0x4d0 [ 30.489873] rcu_core+0x8c8/0x2860 [ 30.490347] __do_softirq+0x1b7/0x7d4 [ 30.490864] [ 30.491091] Last potentially related work creation: [ 30.491710] kasan_save_stack+0x22/0x50 [ 30.492242] __kasan_record_aux_stack+0x8e/0xa0 [ 30.492883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.493572] remove_vma+0x139/0x170 [ 30.494055] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.494644] do_vmi_munmap+0x1f1/0x2b0 [ 30.495177] __vm_munmap+0x138/0x3a0 [ 30.495671] __x64_sys_munmap+0x59/0x80 [ 30.496210] do_syscall_64+0x3f/0x90 [ 30.496733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.497426] [ 30.497658] The buggy address belongs to the object at ffff88800b8312b8 [ 30.497658] which belongs to the cache vm_area_struct of size 168 [ 30.499226] The buggy address is located 88 bytes inside of [ 30.499226] freed 168-byte region [ffff88800b8312b8, ffff88800b831360) [ 30.500744] [ 30.500977] The buggy address belongs to the physical page: [ 30.501686] page:000000005f60c7c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb831 [ 30.502838] memcg:ffff88800c52b201 [ 30.503302] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.503988] page_type: 0xffffffff() [ 30.504482] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.505466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c52b201 [ 30.506437] page dumped because: kasan: bad access detected [ 30.507148] [ 30.507379] Memory state around the buggy address: [ 30.508004] ffff88800b831200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.508936] ffff88800b831280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.509850] >ffff88800b831300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.510765] ^ [ 30.511265] ffff88800b831380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.512183] ffff88800b831400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.513118] ================================================================== [ 30.514438] Disabling lock debugging due to kernel taint [ 33.166260] BUG: Bad rss-counter state mm:000000004a539a8e type:MM_FILEPAGES val:33 [ 33.167369] BUG: Bad rss-counter state mm:000000004a539a8e type:MM_ANONPAGES val:22 [ 33.589763] BUG: Bad rss-counter state mm:000000003e7b70d2 type:MM_FILEPAGES val:33 [ 33.590786] BUG: Bad rss-counter state mm:000000003e7b70d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7159' (ECDSA) to the list of known hosts. 2023/06/21 04:43:18 fuzzer started 2023/06/21 04:43:18 dialing manager at localhost:36067 2023/06/21 04:43:18 checking machine... 2023/06/21 04:43:18 checking revisions... [ 34.248794] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:43:18 testing simple program... [ 34.292687] cgroup: Unknown subsys name 'net' [ 34.336530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:43:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100172af09 RSI=ffff88800b957f48 RDI=ffff88800b957850 RBP=0000000000000000 RSP=ffff88800b957790 R8 =0000000000000001 R9 =ffff88800b957840 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800b957860 R13=ffff88800b957848 R14=ffff88800b957f48 R15=ffff88800b957800 RIP=ffffffff81131c60 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 00007f0271352900 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=00007f02707647d0 CR3=000000000d584000 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=4b07385d8bdbb5ac00000000000ae988 XMM05=f354267c6d1b2b130000000000132fc8 XMM06=00c3ffa147b8d8570000000000131db8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=0000000000000001 RCX=ffffffff83636c05 RDX=0000000000000009 RSI=ffffffff863b3050 RDI=ffffffff85fa4bf4 RBP=ffffffff85fa4bf4 RSP=ffff888019c772f0 R8 =ffffffff863b3050 R9 =ffff888019c773e8 R10=0000000000038001 R11=000000000008a88c R12=ffffffff85fa4c18 R13=ffffffff85fa4bf4 R14=ffffffff85fa4bf4 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000213 [----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 00007feb22dc1900 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=00007ffcef59a000 CR3=000000000d68a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000