syzkaller login: [ 31.733369] BUG: Bad rss-counter state mm:000000009bcfcbfd type:MM_FILEPAGES val:33 [ 31.734345] BUG: Bad rss-counter state mm:000000009bcfcbfd type:MM_ANONPAGES val:22 [ 31.892983] ================================================================== [ 31.893931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.894868] Read of size 8 at addr ffff88800e2f2df0 by task sshd/220 [ 31.895646] [ 31.895865] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.897072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.898172] Call Trace: [ 31.898574] [ 31.898917] dump_stack_lvl+0x91/0xf0 [ 31.899523] print_report+0xcc/0x620 [ 31.900089] ? __virt_addr_valid+0x102/0x340 [ 31.900806] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.901559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.902181] kasan_report+0xbe/0xf0 [ 31.902684] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.903295] vma_interval_tree_remove+0xc75/0xec0 [ 31.903912] vma_prepare+0xc54/0x11a0 [ 31.904415] __split_vma+0x5af/0x950 [ 31.904914] ? __pfx___split_vma+0x10/0x10 [ 31.905478] ? find_held_lock+0x2c/0x110 [ 31.906005] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.906577] ? lock_is_held_type+0x9f/0x120 [ 31.907113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.907728] ? mtree_range_walk+0x632/0x900 [ 31.908276] ? mas_walk+0x5c7/0x7c0 [ 31.908787] do_vmi_munmap+0x1f1/0x2b0 [ 31.909274] mmap_region+0x1f9/0x2660 [ 31.909766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.910273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.910990] ? __pfx_lock_acquire+0x10/0x10 [ 31.911529] ? __pfx_mmap_region+0x10/0x10 [ 31.912058] ? security_mmap_addr+0x7d/0xa0 [ 31.912640] ? get_unmapped_area+0x1f5/0x3f0 [ 31.913185] do_mmap+0x854/0xf00 [ 31.913646] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.914136] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.914707] ksys_mmap_pgoff+0x3af/0x500 [ 31.915209] do_syscall_64+0x3f/0x90 [ 31.915705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.916357] RIP: 0033:0x7f5d03a3ad82 [ 31.916834] 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 [ 31.918972] RSP: 002b:00007ffd3b002c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.919879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d03a3ad82 [ 31.920750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d02e74000 [ 31.921603] RBP: 00007f5d02e74000 R08: 0000000000000009 R09: 0000000000001000 [ 31.922450] R10: 0000000000000812 R11: 0000000000000206 R12: 000056044fa63980 [ 31.923289] R13: 00007ffd3b002c60 R14: 00007ffd3b002c90 R15: 00007ffd3b002ff0 [ 31.924159] [ 31.924470] [ 31.924707] Allocated by task 213: [ 31.925133] kasan_save_stack+0x22/0x50 [ 31.925650] kasan_set_track+0x25/0x30 [ 31.926138] __kasan_slab_alloc+0x59/0x70 [ 31.926668] kmem_cache_alloc+0x16b/0x370 [ 31.927180] vm_area_dup+0x20/0x160 [ 31.927662] __split_vma+0x170/0x950 [ 31.928126] split_vma+0xc6/0x110 [ 31.928590] mprotect_fixup+0x8d2/0xb30 [ 31.929105] do_mprotect_pkey+0x87e/0xd40 [ 31.929649] __x64_sys_mprotect+0x78/0xc0 [ 31.930171] do_syscall_64+0x3f/0x90 [ 31.930656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.931311] [ 31.931539] Freed by task 213: [ 31.931928] kasan_save_stack+0x22/0x50 [ 31.932455] kasan_set_track+0x25/0x30 [ 31.932974] kasan_save_free_info+0x2b/0x50 [ 31.933517] __kasan_slab_free+0x10a/0x190 [ 31.934053] kmem_cache_free+0x10d/0x4d0 [ 31.934566] rcu_core+0x8c8/0x2860 [ 31.935007] __do_softirq+0x1b7/0x7d4 [ 31.935492] [ 31.935704] Last potentially related work creation: [ 31.936292] kasan_save_stack+0x22/0x50 [ 31.936834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.937433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.938227] remove_vma+0x139/0x170 [ 31.938700] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.939255] do_vmi_munmap+0x1f1/0x2b0 [ 31.939751] __vm_munmap+0x138/0x3a0 [ 31.940218] __x64_sys_munmap+0x59/0x80 [ 31.940759] do_syscall_64+0x3f/0x90 [ 31.941230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.941891] [ 31.942107] Second to last potentially related work creation: [ 31.942795] kasan_save_stack+0x22/0x50 [ 31.943291] __kasan_record_aux_stack+0x8e/0xa0 [ 31.943866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.944525] remove_vma+0x139/0x170 [ 31.944983] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.945544] do_vmi_munmap+0x1f1/0x2b0 [ 31.946027] mmap_region+0x1f9/0x2660 [ 31.946519] do_mmap+0x854/0xf00 [ 31.946950] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.947451] ksys_mmap_pgoff+0x7d/0x500 [ 31.947938] do_syscall_64+0x3f/0x90 [ 31.948431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.949085] [ 31.949298] The buggy address belongs to the object at ffff88800e2f2d98 [ 31.949298] which belongs to the cache vm_area_struct of size 168 [ 31.950779] The buggy address is located 88 bytes inside of [ 31.950779] freed 168-byte region [ffff88800e2f2d98, ffff88800e2f2e40) [ 31.952167] [ 31.952398] The buggy address belongs to the physical page: [ 31.953071] page:000000006f11245a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2f2 [ 31.954164] memcg:ffff88800e2e2601 [ 31.954600] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.955297] page_type: 0xffffffff() [ 31.955758] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f10c0 dead000000000005 [ 31.956711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2e2601 [ 31.957626] page dumped because: kasan: bad access detected [ 31.958279] [ 31.958509] Memory state around the buggy address: [ 31.959085] ffff88800e2f2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.959943] ffff88800e2f2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.960843] >ffff88800e2f2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.961697] ^ [ 31.962507] ffff88800e2f2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.963369] ffff88800e2f2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.964214] ================================================================== [ 31.965506] Disabling lock debugging due to kernel taint [ 34.656731] BUG: Bad rss-counter state mm:00000000abb49388 type:MM_FILEPAGES val:33 [ 34.657739] BUG: Bad rss-counter state mm:00000000abb49388 type:MM_ANONPAGES val:22 [ 35.232263] BUG: Bad rss-counter state mm:0000000098016e40 type:MM_FILEPAGES val:33 [ 35.233417] BUG: Bad rss-counter state mm:0000000098016e40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60355' (ECDSA) to the list of known hosts. 2023/06/20 21:21:30 fuzzer started 2023/06/20 21:21:30 dialing manager at localhost:36067 2023/06/20 21:21:30 checking machine... 2023/06/20 21:21:30 checking revisions... [ 35.858049] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:21:30 testing simple program... [ 35.899284] cgroup: Unknown subsys name 'net' [ 35.947153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:21:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fa27f2a6360 CR3=0000000016604000 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=2030333a31323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff85652c60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a327a30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f635b94a477 R13=0000000000000000 R14=ffff88800fbe51c0 R15=ffff88800d6fad10 RIP=ffffffff814c0250 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 00007f635b457900 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=00007ffc97ced000 CR3=000000000d81e000 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=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