syzkaller login: [ 31.353867] BUG: Bad rss-counter state mm:000000006ddfb805 type:MM_FILEPAGES val:33 [ 31.354989] BUG: Bad rss-counter state mm:000000006ddfb805 type:MM_ANONPAGES val:22 [ 31.527763] ================================================================== [ 31.528685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.529621] Read of size 8 at addr ffff8880159e1140 by task sshd/220 [ 31.530495] [ 31.530723] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.531582] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.532565] Call Trace: [ 31.532883] [ 31.533162] dump_stack_lvl+0x91/0xf0 [ 31.533644] print_report+0xcc/0x620 [ 31.534131] ? __virt_addr_valid+0x102/0x340 [ 31.534695] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.535313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.535928] kasan_report+0xbe/0xf0 [ 31.536400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.537042] vma_interval_tree_remove+0xc75/0xec0 [ 31.537646] vma_prepare+0xc54/0x11a0 [ 31.538130] __split_vma+0x5af/0x950 [ 31.538605] ? __pfx___split_vma+0x10/0x10 [ 31.539139] ? find_held_lock+0x2c/0x110 [ 31.539656] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.540224] ? lock_is_held_type+0x9f/0x120 [ 31.540772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.541368] ? mtree_range_walk+0x632/0x900 [ 31.541921] ? mas_walk+0x5c7/0x7c0 [ 31.542405] do_vmi_munmap+0x1f1/0x2b0 [ 31.542915] mmap_region+0x1f9/0x2660 [ 31.543391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.543902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.544619] ? __pfx_lock_acquire+0x10/0x10 [ 31.545155] ? __pfx_mmap_region+0x10/0x10 [ 31.545691] ? security_mmap_addr+0x7d/0xa0 [ 31.546223] ? get_unmapped_area+0x1f5/0x3f0 [ 31.546779] do_mmap+0x854/0xf00 [ 31.547217] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.547731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.548302] ksys_mmap_pgoff+0x3af/0x500 [ 31.548812] do_syscall_64+0x3f/0x90 [ 31.549297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.549946] RIP: 0033:0x7fe586829d82 [ 31.550404] 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 [ 31.552547] RSP: 002b:00007ffe8351aad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.553447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe586829d82 [ 31.554294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe585c63000 [ 31.555172] RBP: 00007fe585c63000 R08: 0000000000000009 R09: 0000000000001000 [ 31.556028] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cfb81eec0 [ 31.556875] R13: 00007ffe8351aaf0 R14: 00007ffe8351ab20 R15: 00007ffe8351ae80 [ 31.557729] [ 31.558016] [ 31.558232] Allocated by task 213: [ 31.558662] kasan_save_stack+0x22/0x50 [ 31.559171] kasan_set_track+0x25/0x30 [ 31.559659] __kasan_slab_alloc+0x59/0x70 [ 31.560182] kmem_cache_alloc+0x16b/0x370 [ 31.560694] vm_area_dup+0x20/0x160 [ 31.561144] __split_vma+0x170/0x950 [ 31.561616] split_vma+0xc6/0x110 [ 31.562050] mprotect_fixup+0x8d2/0xb30 [ 31.562555] do_mprotect_pkey+0x87e/0xd40 [ 31.563094] __x64_sys_mprotect+0x78/0xc0 [ 31.563616] do_syscall_64+0x3f/0x90 [ 31.564096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.564735] [ 31.564948] Freed by task 213: [ 31.565340] kasan_save_stack+0x22/0x50 [ 31.565838] kasan_set_track+0x25/0x30 [ 31.566335] kasan_save_free_info+0x2b/0x50 [ 31.566876] __kasan_slab_free+0x10a/0x190 [ 31.567409] kmem_cache_free+0x10d/0x4d0 [ 31.567914] rcu_core+0x8c8/0x2860 [ 31.568362] __do_softirq+0x1b7/0x7d4 [ 31.568833] [ 31.569056] Last potentially related work creation: [ 31.569651] kasan_save_stack+0x22/0x50 [ 31.570154] __kasan_record_aux_stack+0x8e/0xa0 [ 31.570737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.571372] remove_vma+0x139/0x170 [ 31.571818] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.572383] do_vmi_munmap+0x1f1/0x2b0 [ 31.572880] __vm_munmap+0x138/0x3a0 [ 31.573343] __x64_sys_munmap+0x59/0x80 [ 31.573836] do_syscall_64+0x3f/0x90 [ 31.574307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574951] [ 31.575166] The buggy address belongs to the object at ffff8880159e10e8 [ 31.575166] which belongs to the cache vm_area_struct of size 168 [ 31.576633] The buggy address is located 88 bytes inside of [ 31.576633] freed 168-byte region [ffff8880159e10e8, ffff8880159e1190) [ 31.578026] [ 31.578240] The buggy address belongs to the physical page: [ 31.578928] page:00000000a3f3a827 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159e1 [ 31.580012] memcg:ffff88801015b201 [ 31.580441] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.581085] page_type: 0xffffffff() [ 31.581531] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.582439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801015b201 [ 31.583370] page dumped because: kasan: bad access detected [ 31.584044] [ 31.584257] Memory state around the buggy address: [ 31.584841] ffff8880159e1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.585697] ffff8880159e1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.586569] >ffff8880159e1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.587424] ^ [ 31.588063] ffff8880159e1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.588923] ffff8880159e1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.589780] ================================================================== [ 31.590842] Disabling lock debugging due to kernel taint [ 33.985802] BUG: Bad rss-counter state mm:00000000e5891762 type:MM_FILEPAGES val:33 [ 33.987307] BUG: Bad rss-counter state mm:00000000e5891762 type:MM_ANONPAGES val:22 [ 34.498475] BUG: Bad rss-counter state mm:00000000a350053b type:MM_FILEPAGES val:33 [ 34.500200] BUG: Bad rss-counter state mm:00000000a350053b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60849' (ECDSA) to the list of known hosts. 2023/06/20 02:59:27 fuzzer started 2023/06/20 02:59:28 dialing manager at localhost:44161 2023/06/20 02:59:28 checking machine... 2023/06/20 02:59:28 checking revisions... [ 35.156042] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:59:28 testing simple program... [ 35.211789] cgroup: Unknown subsys name 'net' [ 35.270527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:59:27 Registers: info registers vcpu 0 RAX=ffffffff864bd3eb RBX=0000000000000001 RCX=ffffffff864bd3e6 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85d793d4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a7b RFL=00000202 [-------] 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 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=00007ffd41208718 CR3=000000000dcbe000 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=2037323a39353a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85d3d010 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=00000000fffbf162 RDI=ffff88806cf3a2d4 RBP=0000000000006e41 RSP=ffff88806cf09c40 R8 =00000000fffd8b8a R9 =fffffbfff0ba77da R10=0000000000006e41 R11=ffff88806cf09ff8 R12=ffffffff85d3bf9c R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8450bdc4 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 00007fd141994900 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=00007fd141f4c0b0 CR3=000000000edaa000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000