syzkaller login: [ 66.544999] BUG: Bad rss-counter state mm:00000000f49142eb type:MM_FILEPAGES val:33 [ 66.546210] BUG: Bad rss-counter state mm:00000000f49142eb type:MM_ANONPAGES val:22 [ 66.586860] ================================================================== [ 66.588088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.589232] Read of size 8 at addr ffff88801a529798 by task sshd/228 [ 66.590077] [ 66.590309] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.591322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.592472] Call Trace: [ 66.592797] [ 66.593155] dump_stack_lvl+0x91/0xf0 [ 66.593648] print_report+0xcc/0x620 [ 66.594167] ? __virt_addr_valid+0x102/0x340 [ 66.594889] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.595528] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.596152] kasan_report+0xbe/0xf0 [ 66.596631] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.597284] vma_interval_tree_remove+0xc75/0xec0 [ 66.598089] vma_prepare+0xc54/0x11a0 [ 66.598580] __split_vma+0x5af/0x950 [ 66.599120] ? __pfx___split_vma+0x10/0x10 [ 66.599843] ? find_held_lock+0x2c/0x110 [ 66.600414] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.601033] ? lock_is_held_type+0x9f/0x120 [ 66.601603] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.602332] ? mtree_range_walk+0x632/0x900 [ 66.602996] ? mas_walk+0x5c7/0x7c0 [ 66.603471] do_vmi_munmap+0x1f1/0x2b0 [ 66.603983] mmap_region+0x1f9/0x2660 [ 66.604467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.604975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.605704] ? __pfx_lock_acquire+0x10/0x10 [ 66.606251] ? __pfx_mmap_region+0x10/0x10 [ 66.606780] ? security_mmap_addr+0x7d/0xa0 [ 66.607308] ? get_unmapped_area+0x1f5/0x3f0 [ 66.607878] do_mmap+0x854/0xf00 [ 66.608321] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.608822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.609384] ksys_mmap_pgoff+0x3af/0x500 [ 66.609893] do_syscall_64+0x3f/0x90 [ 66.610370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.611017] RIP: 0033:0x7fb68c479d82 [ 66.611477] 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 [ 66.613635] RSP: 002b:00007ffe17b38908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.614541] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb68c479d82 [ 66.615407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb68b8b3000 [ 66.616277] RBP: 00007fb68b8b3000 R08: 0000000000000009 R09: 0000000000001000 [ 66.617139] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d141b2ec0 [ 66.618005] R13: 00007ffe17b38920 R14: 00007ffe17b38950 R15: 00007ffe17b38cb0 [ 66.618879] [ 66.619180] [ 66.619400] Allocated by task 221: [ 66.619848] kasan_save_stack+0x22/0x50 [ 66.620354] kasan_set_track+0x25/0x30 [ 66.620863] __kasan_slab_alloc+0x59/0x70 [ 66.621383] kmem_cache_alloc+0x16b/0x370 [ 66.621902] vm_area_dup+0x20/0x160 [ 66.622354] __split_vma+0x170/0x950 [ 66.622823] split_vma+0xc6/0x110 [ 66.623264] mprotect_fixup+0x8d2/0xb30 [ 66.623782] do_mprotect_pkey+0x87e/0xd40 [ 66.624302] __x64_sys_mprotect+0x78/0xc0 [ 66.624828] do_syscall_64+0x3f/0x90 [ 66.625302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.625947] [ 66.626165] Freed by task 221: [ 66.626560] kasan_save_stack+0x22/0x50 [ 66.627068] kasan_set_track+0x25/0x30 [ 66.627582] kasan_save_free_info+0x2b/0x50 [ 66.628114] __kasan_slab_free+0x10a/0x190 [ 66.628653] kmem_cache_free+0x10d/0x4d0 [ 66.629158] rcu_core+0x8c8/0x2860 [ 66.629598] __do_softirq+0x1b7/0x7d4 [ 66.630122] [ 66.630340] Last potentially related work creation: [ 66.630920] kasan_save_stack+0x22/0x50 [ 66.631425] __kasan_record_aux_stack+0x8e/0xa0 [ 66.632014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.632651] remove_vma+0x139/0x170 [ 66.633116] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.633673] do_vmi_munmap+0x1f1/0x2b0 [ 66.634166] __vm_munmap+0x138/0x3a0 [ 66.634635] __x64_sys_munmap+0x59/0x80 [ 66.635130] do_syscall_64+0x3f/0x90 [ 66.635618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.636271] [ 66.636484] The buggy address belongs to the object at ffff88801a529740 [ 66.636484] which belongs to the cache vm_area_struct of size 168 [ 66.637988] The buggy address is located 88 bytes inside of [ 66.637988] freed 168-byte region [ffff88801a529740, ffff88801a5297e8) [ 66.639423] [ 66.639645] The buggy address belongs to the physical page: [ 66.640307] page:00000000bc2b7a13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a529 [ 66.641437] memcg:ffff88800fea8c01 [ 66.641867] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.642529] page_type: 0xffffffff() [ 66.642988] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.643922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fea8c01 [ 66.644829] page dumped because: kasan: bad access detected [ 66.645506] [ 66.645727] Memory state around the buggy address: [ 66.646318] ffff88801a529680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.647174] ffff88801a529700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 66.648059] >ffff88801a529780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 66.648908] ^ [ 66.649395] ffff88801a529800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 66.650254] ffff88801a529880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 66.651101] ================================================================== [ 66.652009] Disabling lock debugging due to kernel taint [ 68.675794] BUG: Bad rss-counter state mm:00000000677c17aa type:MM_FILEPAGES val:33 [ 68.676992] BUG: Bad rss-counter state mm:00000000677c17aa type:MM_ANONPAGES val:22 [ 69.128816] BUG: Bad rss-counter state mm:000000004e33bf84 type:MM_FILEPAGES val:33 [ 69.129963] BUG: Bad rss-counter state mm:000000004e33bf84 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28947' (ECDSA) to the list of known hosts. 2023/06/19 11:46:21 fuzzer started 2023/06/19 11:46:22 dialing manager at localhost:44161 2023/06/19 11:46:22 checking machine... 2023/06/19 11:46:22 checking revisions... [ 69.823326] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:46:22 testing simple program... [ 69.863962] cgroup: Unknown subsys name 'net' [ 69.909775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:46:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800885cb80 RCX=0000000000000000 RDX=1ffffffff09a5d75 RSI=ffffffff818dcced RDI=ffffffff84d2eba8 RBP=ffffffff84d2eba0 RSP=ffff888017c1fc80 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000020 R14=ffff88800885cc08 R15=ffff88800885cc58 RIP=ffffffff814c07eb 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 00007f7630394900 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=00007fff62d04000 CR3=000000000f1d4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fe86b9315d0 CR3=000000000f246000 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=17864adb1556b9a99a4cc09b1b040aa2 XMM02=2c67c8bc2e329bc3000000000011d280 XMM03=fb795ef6d65770560000000000123fd8 XMM04=bb7dacfde64a5f8b00000000000ae988 XMM05=1a58cb52dc18f6d70000000000133898 XMM06=f50f1dd00cceccdd0000000000132a70 XMM07=e042d86d42eb936e00000000001242b0 XMM08=5c97a5f711c73041000000000011d2e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000