syzkaller login: [ 30.504003] BUG: Bad rss-counter state mm:00000000c0003216 type:MM_FILEPAGES val:33 [ 30.504826] BUG: Bad rss-counter state mm:00000000c0003216 type:MM_ANONPAGES val:22 [ 30.634134] ================================================================== [ 30.635145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.636429] Read of size 8 at addr ffff888019fb2798 by task sshd/219 [ 30.637288] [ 30.637531] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.638492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.639582] Call Trace: [ 30.640007] [ 30.640320] dump_stack_lvl+0x91/0xf0 [ 30.640876] print_report+0xcc/0x620 [ 30.641422] ? __virt_addr_valid+0x102/0x340 [ 30.642066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643454] kasan_report+0xbe/0xf0 [ 30.644023] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644728] vma_interval_tree_remove+0xc75/0xec0 [ 30.645399] vma_prepare+0xc54/0x11a0 [ 30.645946] __split_vma+0x5af/0x950 [ 30.646468] ? __pfx___split_vma+0x10/0x10 [ 30.647072] ? find_held_lock+0x2c/0x110 [ 30.647651] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.648326] ? lock_is_held_type+0x9f/0x120 [ 30.648942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.649616] ? mtree_range_walk+0x632/0x900 [ 30.650288] ? mas_walk+0x5c7/0x7c0 [ 30.650865] do_vmi_munmap+0x1f1/0x2b0 [ 30.651442] mmap_region+0x1f9/0x2660 [ 30.652057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.652686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.653530] ? __pfx_lock_acquire+0x10/0x10 [ 30.654143] ? __pfx_mmap_region+0x10/0x10 [ 30.654754] ? security_mmap_addr+0x7d/0xa0 [ 30.655363] ? get_unmapped_area+0x1f5/0x3f0 [ 30.656032] do_mmap+0x854/0xf00 [ 30.656530] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.657100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.657765] ksys_mmap_pgoff+0x3af/0x500 [ 30.658342] do_syscall_64+0x3f/0x90 [ 30.658905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659572] RIP: 0033:0x7f0c45fe4d82 [ 30.660059] 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 [ 30.662232] RSP: 002b:00007fff8d4eeb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.663154] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c45fe4d82 [ 30.664065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c4541e000 [ 30.664925] RBP: 00007f0c4541e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.665789] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f6d25df70 [ 30.666640] R13: 00007fff8d4eeb20 R14: 00007fff8d4eeb50 R15: 00007fff8d4eeeb0 [ 30.667517] [ 30.667846] [ 30.668070] Allocated by task 212: [ 30.668520] kasan_save_stack+0x22/0x50 [ 30.669067] kasan_set_track+0x25/0x30 [ 30.669586] __kasan_slab_alloc+0x59/0x70 [ 30.670155] kmem_cache_alloc+0x16b/0x370 [ 30.670717] vm_area_dup+0x20/0x160 [ 30.671201] __split_vma+0x170/0x950 [ 30.671712] split_vma+0xc6/0x110 [ 30.672214] mprotect_fixup+0x8d2/0xb30 [ 30.672760] do_mprotect_pkey+0x87e/0xd40 [ 30.673319] __x64_sys_mprotect+0x78/0xc0 [ 30.673878] do_syscall_64+0x3f/0x90 [ 30.674378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.675077] [ 30.675303] Freed by task 212: [ 30.675735] kasan_save_stack+0x22/0x50 [ 30.676302] kasan_set_track+0x25/0x30 [ 30.676831] kasan_save_free_info+0x2b/0x50 [ 30.677374] __kasan_slab_free+0x10a/0x190 [ 30.677937] kmem_cache_free+0x10d/0x4d0 [ 30.678452] rcu_core+0x8c8/0x2860 [ 30.678918] __do_softirq+0x1b7/0x7d4 [ 30.679411] [ 30.679629] Last potentially related work creation: [ 30.680262] kasan_save_stack+0x22/0x50 [ 30.680796] __kasan_record_aux_stack+0x8e/0xa0 [ 30.681391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.682061] remove_vma+0x139/0x170 [ 30.682527] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.683105] do_vmi_munmap+0x1f1/0x2b0 [ 30.683600] __vm_munmap+0x138/0x3a0 [ 30.684124] __x64_sys_munmap+0x59/0x80 [ 30.684643] do_syscall_64+0x3f/0x90 [ 30.685168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685871] [ 30.686100] The buggy address belongs to the object at ffff888019fb2740 [ 30.686100] which belongs to the cache vm_area_struct of size 168 [ 30.687687] The buggy address is located 88 bytes inside of [ 30.687687] freed 168-byte region [ffff888019fb2740, ffff888019fb27e8) [ 30.689254] [ 30.689487] The buggy address belongs to the physical page: [ 30.690215] page:000000009d6a84f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fb2 [ 30.691403] memcg:ffff888019f97501 [ 30.692068] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.692946] page_type: 0xffffffff() [ 30.693541] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.694779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f97501 [ 30.696029] page dumped because: kasan: bad access detected [ 30.696933] [ 30.697212] Memory state around the buggy address: [ 30.697994] ffff888019fb2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.699125] ffff888019fb2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.700279] >ffff888019fb2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.701413] ^ [ 30.702055] ffff888019fb2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.703196] ffff888019fb2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.704326] ================================================================== [ 30.705732] Disabling lock debugging due to kernel taint [ 32.625063] BUG: Bad rss-counter state mm:0000000067092aed type:MM_FILEPAGES val:33 [ 32.626281] BUG: Bad rss-counter state mm:0000000067092aed type:MM_ANONPAGES val:22 [ 33.078723] BUG: Bad rss-counter state mm:0000000062d4d86d type:MM_FILEPAGES val:33 [ 33.080390] BUG: Bad rss-counter state mm:0000000062d4d86d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15195' (ECDSA) to the list of known hosts. 2023/06/21 04:10:27 fuzzer started 2023/06/21 04:10:27 dialing manager at localhost:36067 2023/06/21 04:10:27 checking machine... 2023/06/21 04:10:27 checking revisions... [ 33.851875] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:10:27 testing simple program... [ 33.890769] cgroup: Unknown subsys name 'net' [ 33.931405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:10:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110028e4ef8 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880147277b0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888019e13608 R15=0000000000000000 RIP=ffffffff812d8f18 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 00007fd81b273900 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=00007fd81a67cd78 CR3=000000000f60a000 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=239c04bff8af4ba2cd49b8ff17f4e062 XMM02=0000000000119d60d59e07bde36eea69 XMM03=0000000000119e88ec2efd57dc4c00df XMM04=9536eb9bf413b7ca00000000000ae988 XMM05=0edc813135bc075500000000001321b0 XMM06=806171799158d9670000000000130fa0 XMM07=fb795ef6d657705600000000001212f0 XMM08=2c67c8bc2e329bc30000000000119e88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000f RCX=0000000000000000 RDX=ffff888016cab680 RSI=ffffffff844a53ab RDI=0000000000000007 RBP=ffff88800fd5f208 RSP=ffff8880164afce8 R8 =0000000000000007 R9 =0000000000000000 R10=00007f5e2e9cefff R11=0000000000000000 R12=00007f5e2e9cefff R13=000000000000000e R14=00007f5e2e9cefff R15=00007f5e2e9cefff RIP=ffffffff844a53b0 RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5e2de2f900 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=00007f5e2e983044 CR3=000000000db62000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=b7f2843b077b7d112cd617aa98934e80 XMM05=00000000000000000000000000000000 XMM06=7373653b077573112c65172068734e3d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000