syzkaller login: [ 36.076911] BUG: Bad rss-counter state mm:000000002151c6b5 type:MM_FILEPAGES val:33 [ 36.078628] BUG: Bad rss-counter state mm:000000002151c6b5 type:MM_ANONPAGES val:22 [ 36.269418] ================================================================== [ 36.270382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.271414] Read of size 8 at addr ffff88801a1a4df0 by task sshd/220 [ 36.272205] [ 36.272436] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.273313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.274316] Call Trace: [ 36.274650] [ 36.274982] dump_stack_lvl+0x91/0xf0 [ 36.275505] print_report+0xcc/0x620 [ 36.275998] ? __virt_addr_valid+0x102/0x340 [ 36.276569] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.277199] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.277834] kasan_report+0xbe/0xf0 [ 36.278316] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.278982] vma_interval_tree_remove+0xc75/0xec0 [ 36.279621] vma_prepare+0xc54/0x11a0 [ 36.280110] __split_vma+0x5af/0x950 [ 36.280604] ? __pfx___split_vma+0x10/0x10 [ 36.281143] ? find_held_lock+0x2c/0x110 [ 36.281686] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.282281] ? lock_is_held_type+0x9f/0x120 [ 36.282854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.283494] ? mtree_range_walk+0x632/0x900 [ 36.284046] ? mas_walk+0x5c7/0x7c0 [ 36.284614] do_vmi_munmap+0x1f1/0x2b0 [ 36.285156] mmap_region+0x1f9/0x2660 [ 36.285667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.286182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.286929] ? __pfx_lock_acquire+0x10/0x10 [ 36.287496] ? __pfx_mmap_region+0x10/0x10 [ 36.288034] ? security_mmap_addr+0x7d/0xa0 [ 36.288624] ? get_unmapped_area+0x1f5/0x3f0 [ 36.289191] do_mmap+0x854/0xf00 [ 36.289708] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.290210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.290809] ksys_mmap_pgoff+0x3af/0x500 [ 36.291326] do_syscall_64+0x3f/0x90 [ 36.291812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.292481] RIP: 0033:0x7f68c9e6bd82 [ 36.292938] 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 [ 36.295150] RSP: 002b:00007ffd27856838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.296081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68c9e6bd82 [ 36.296949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68c92a5000 [ 36.297835] RBP: 00007f68c92a5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.298699] R10: 0000000000000812 R11: 0000000000000206 R12: 000056091f3a6ec0 [ 36.299585] R13: 00007ffd27856850 R14: 00007ffd27856880 R15: 00007ffd27856be0 [ 36.300452] [ 36.300748] [ 36.300966] Allocated by task 213: [ 36.301403] kasan_save_stack+0x22/0x50 [ 36.301972] kasan_set_track+0x25/0x30 [ 36.302484] __kasan_slab_alloc+0x59/0x70 [ 36.303033] kmem_cache_alloc+0x16b/0x370 [ 36.303558] vm_area_dup+0x20/0x160 [ 36.304015] __split_vma+0x170/0x950 [ 36.304491] split_vma+0xc6/0x110 [ 36.304935] mprotect_fixup+0x8d2/0xb30 [ 36.305460] do_mprotect_pkey+0x87e/0xd40 [ 36.305987] __x64_sys_mprotect+0x78/0xc0 [ 36.306524] do_syscall_64+0x3f/0x90 [ 36.307007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.307663] [ 36.307877] Freed by task 213: [ 36.308275] kasan_save_stack+0x22/0x50 [ 36.308789] kasan_set_track+0x25/0x30 [ 36.309283] kasan_save_free_info+0x2b/0x50 [ 36.309835] __kasan_slab_free+0x10a/0x190 [ 36.310367] kmem_cache_free+0x10d/0x4d0 [ 36.310904] rcu_core+0x8c8/0x2860 [ 36.311353] __do_softirq+0x1b7/0x7d4 [ 36.311843] [ 36.312057] Last potentially related work creation: [ 36.312655] kasan_save_stack+0x22/0x50 [ 36.313159] __kasan_record_aux_stack+0x8e/0xa0 [ 36.313761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.314408] remove_vma+0x139/0x170 [ 36.314906] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.315476] do_vmi_munmap+0x1f1/0x2b0 [ 36.316021] __vm_munmap+0x138/0x3a0 [ 36.316513] __x64_sys_munmap+0x59/0x80 [ 36.317022] do_syscall_64+0x3f/0x90 [ 36.317538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.318195] [ 36.318419] The buggy address belongs to the object at ffff88801a1a4d98 [ 36.318419] which belongs to the cache vm_area_struct of size 168 [ 36.319914] The buggy address is located 88 bytes inside of [ 36.319914] freed 168-byte region [ffff88801a1a4d98, ffff88801a1a4e40) [ 36.321346] [ 36.321597] The buggy address belongs to the physical page: [ 36.322301] page:00000000f0d83031 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1a4 [ 36.323492] memcg:ffff88800f277a01 [ 36.323994] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.324667] page_type: 0xffffffff() [ 36.325121] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.326097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f277a01 [ 36.327067] page dumped because: kasan: bad access detected [ 36.327758] [ 36.327977] Memory state around the buggy address: [ 36.328569] ffff88801a1a4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.329463] ffff88801a1a4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.330344] >ffff88801a1a4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.331226] ^ [ 36.332053] ffff88801a1a4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.332923] ffff88801a1a4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.333805] ================================================================== [ 36.335227] Disabling lock debugging due to kernel taint [ 38.668981] BUG: Bad rss-counter state mm:00000000687fb599 type:MM_FILEPAGES val:33 [ 38.670172] BUG: Bad rss-counter state mm:00000000687fb599 type:MM_ANONPAGES val:22 [ 39.057999] BUG: Bad rss-counter state mm:00000000071002e6 type:MM_FILEPAGES val:33 [ 39.058922] BUG: Bad rss-counter state mm:00000000071002e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51998' (ECDSA) to the list of known hosts. 2023/06/20 00:20:47 fuzzer started 2023/06/20 00:20:47 dialing manager at localhost:44161 2023/06/20 00:20:47 checking machine... 2023/06/20 00:20:47 checking revisions... [ 39.841249] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:20:47 testing simple program... [ 39.886009] cgroup: Unknown subsys name 'net' [ 39.925637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:20:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=1ffffffff0ba7a02 RDX=0000000000000002 RSI=00000000fffc0281 RDI=ffff88806ce3a2d2 RBP=0000000000000001 RSP=ffff88806ce095e0 R8 =00000000fffd9ca9 R9 =fffffbfff0ba77da R10=0000000000006f21 R11=00000016f07198e8 R12=ffffffff85d3bf9c R13=ffff88806ce3a2c0 R14=1ffff1100d9c12cd R15=0000000000000000 RIP=ffffffff8137cc90 RFL=00000002 [-------] 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=00007fd495ee5ce0 CR3=000000000da44000 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=2036343a30323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880198fb3c0 RCX=1ffff1100118f204 RDX=dffffc0000000000 RSI=ffffffff8386601e RDI=0000000000000000 RBP=ffffffff87f94640 RSP=ffff888014697db8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000009 R13=0000000000000ea0 R14=ffff888008c78ea0 R15=0000000000000001 RIP=ffffffff81392fc6 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 00007fc4d3b64900 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=00007ffec8028000 CR3=000000000e50c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000