syzkaller login: [ 32.241544] BUG: Bad rss-counter state mm:0000000033f32956 type:MM_FILEPAGES val:33 [ 32.242794] BUG: Bad rss-counter state mm:0000000033f32956 type:MM_ANONPAGES val:22 [ 32.286504] ================================================================== [ 32.287437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.288400] Read of size 8 at addr ffff8880146e16b0 by task sshd/220 [ 32.289171] [ 32.289397] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.290416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.291412] Call Trace: [ 32.291746] [ 32.292052] dump_stack_lvl+0x91/0xf0 [ 32.292548] print_report+0xcc/0x620 [ 32.293045] ? __virt_addr_valid+0x102/0x340 [ 32.293607] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.294243] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.294865] kasan_report+0xbe/0xf0 [ 32.295359] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.296002] vma_interval_tree_remove+0xc75/0xec0 [ 32.296606] vma_prepare+0xc54/0x11a0 [ 32.297085] __split_vma+0x5af/0x950 [ 32.297564] ? __pfx___split_vma+0x10/0x10 [ 32.298100] ? find_held_lock+0x2c/0x110 [ 32.298632] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.299197] ? lock_is_held_type+0x9f/0x120 [ 32.299754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.300373] ? mtree_range_walk+0x632/0x900 [ 32.300934] ? mas_walk+0x5c7/0x7c0 [ 32.301403] do_vmi_munmap+0x1f1/0x2b0 [ 32.301904] mmap_region+0x1f9/0x2660 [ 32.302396] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.302915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.303643] ? __pfx_lock_acquire+0x10/0x10 [ 32.304175] ? __pfx_mmap_region+0x10/0x10 [ 32.304715] ? security_mmap_addr+0x7d/0xa0 [ 32.305252] ? get_unmapped_area+0x1f5/0x3f0 [ 32.305805] do_mmap+0x854/0xf00 [ 32.306249] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.306749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.307313] ksys_mmap_pgoff+0x3af/0x500 [ 32.307853] do_syscall_64+0x3f/0x90 [ 32.308339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.308989] RIP: 0033:0x7ff8d9f0ed82 [ 32.309451] 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 [ 32.311577] RSP: 002b:00007ffcabab9ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.312511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8d9f0ed82 [ 32.313359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8d9348000 [ 32.314217] RBP: 00007ff8d9348000 R08: 0000000000000009 R09: 0000000000001000 [ 32.315074] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b2280aec0 [ 32.315937] R13: 00007ffcabab9f10 R14: 00007ffcabab9f40 R15: 00007ffcababa2a0 [ 32.316785] [ 32.317082] [ 32.317301] Allocated by task 213: [ 32.317733] kasan_save_stack+0x22/0x50 [ 32.318244] kasan_set_track+0x25/0x30 [ 32.318750] __kasan_slab_alloc+0x59/0x70 [ 32.319288] kmem_cache_alloc+0x16b/0x370 [ 32.319830] vm_area_dup+0x20/0x160 [ 32.320299] __split_vma+0x170/0x950 [ 32.320767] split_vma+0xc6/0x110 [ 32.321209] mprotect_fixup+0x8d2/0xb30 [ 32.321723] do_mprotect_pkey+0x87e/0xd40 [ 32.322258] __x64_sys_mprotect+0x78/0xc0 [ 32.322784] do_syscall_64+0x3f/0x90 [ 32.323262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.323917] [ 32.324131] Freed by task 213: [ 32.324535] kasan_save_stack+0x22/0x50 [ 32.325047] kasan_set_track+0x25/0x30 [ 32.325541] kasan_save_free_info+0x2b/0x50 [ 32.326088] __kasan_slab_free+0x10a/0x190 [ 32.326637] kmem_cache_free+0x10d/0x4d0 [ 32.327149] rcu_core+0x8c8/0x2860 [ 32.327632] __do_softirq+0x1b7/0x7d4 [ 32.328118] [ 32.328332] Last potentially related work creation: [ 32.328917] kasan_save_stack+0x22/0x50 [ 32.329425] __kasan_record_aux_stack+0x8e/0xa0 [ 32.330005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.330654] remove_vma+0x139/0x170 [ 32.331190] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.331768] do_vmi_munmap+0x1f1/0x2b0 [ 32.332259] __vm_munmap+0x138/0x3a0 [ 32.332733] __x64_sys_munmap+0x59/0x80 [ 32.333229] do_syscall_64+0x3f/0x90 [ 32.333712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.334355] [ 32.334569] The buggy address belongs to the object at ffff8880146e1658 [ 32.334569] which belongs to the cache vm_area_struct of size 168 [ 32.336069] The buggy address is located 88 bytes inside of [ 32.336069] freed 168-byte region [ffff8880146e1658, ffff8880146e1700) [ 32.337497] [ 32.337719] The buggy address belongs to the physical page: [ 32.338388] page:000000002453bccd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146e1 [ 32.339487] memcg:ffff888016908801 [ 32.339926] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.340575] page_type: 0xffffffff() [ 32.341028] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.341947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016908801 [ 32.342870] page dumped because: kasan: bad access detected [ 32.343534] [ 32.343760] Memory state around the buggy address: [ 32.344340] ffff8880146e1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.345195] ffff8880146e1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.346058] >ffff8880146e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.346907] ^ [ 32.347488] ffff8880146e1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.348346] ffff8880146e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.349198] ================================================================== [ 32.350114] Disabling lock debugging due to kernel taint [ 34.769742] BUG: Bad rss-counter state mm:000000003003c1fa type:MM_FILEPAGES val:33 [ 34.770906] BUG: Bad rss-counter state mm:000000003003c1fa type:MM_ANONPAGES val:22 [ 35.161459] BUG: Bad rss-counter state mm:000000000c28d8f3 type:MM_FILEPAGES val:33 [ 35.162648] BUG: Bad rss-counter state mm:000000000c28d8f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36873' (ECDSA) to the list of known hosts. 2023/06/20 03:47:56 fuzzer started 2023/06/20 03:47:56 dialing manager at localhost:44161 2023/06/20 03:47:56 checking machine... 2023/06/20 03:47:56 checking revisions... [ 35.888770] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:47:56 testing simple program... [ 35.934865] cgroup: Unknown subsys name 'net' [ 35.993447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:47:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016f4f170 RCX=0000000000000005 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888016f4f118 RBP=ffff88800eceb680 RSP=ffff888016f4f080 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888016f4f0d8 R11=ffffffff81806df1 R12=0000000000000000 R13=ffff888016f4f100 R14=ffff88800eceb680 R15=ffff888016f4f0d8 RIP=ffffffff8450d445 RFL=00000206 [-----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 00007f39f44b0900 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=00007ffd6e6ad000 CR3=000000000cb3e000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009520000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000015 RDI=ffff8880095203f4 RBP=0000000000000015 RSP=ffff88800952f038 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000009293 R12=0000000000000001 R13=ffff88807ffdc000 R14=ffffea000073a580 R15=0000000000000001 RIP=ffffffff8135bd1b RFL=00000017 [----APC] 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 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=00007f39f4367000 CR3=000000000cb3e000 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=000005d20c000005c20806000005bc10 XMM02=080000061b084c151020000005241800 XMM03=501500000d260808000005b0204f1500 XMM04=1c9c1a00000679190000066f08060000 XMM05=270806000d000000420b000006640000 XMM06=17000016e108000000061b05b4170000 XMM07=000000341c1c16000016400300180000 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000