syzkaller login: [ 30.711506] BUG: Bad rss-counter state mm:000000000cd32076 type:MM_FILEPAGES val:33 [ 30.712526] BUG: Bad rss-counter state mm:000000000cd32076 type:MM_ANONPAGES val:22 [ 30.877000] ================================================================== [ 30.878093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.879304] Read of size 8 at addr ffff88800d5c1df0 by task sshd/220 [ 30.880195] [ 30.880420] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.881317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.882321] Call Trace: [ 30.882652] [ 30.882946] dump_stack_lvl+0x91/0xf0 [ 30.883458] print_report+0xcc/0x620 [ 30.883950] ? __virt_addr_valid+0x102/0x340 [ 30.884519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885137] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885756] kasan_report+0xbe/0xf0 [ 30.886243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886867] vma_interval_tree_remove+0xc75/0xec0 [ 30.887478] vma_prepare+0xc54/0x11a0 [ 30.887961] __split_vma+0x5af/0x950 [ 30.888460] ? __pfx___split_vma+0x10/0x10 [ 30.888991] ? find_held_lock+0x2c/0x110 [ 30.889524] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.890097] ? lock_is_held_type+0x9f/0x120 [ 30.890652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.891266] ? mtree_range_walk+0x632/0x900 [ 30.891825] ? mas_walk+0x5c7/0x7c0 [ 30.892322] do_vmi_munmap+0x1f1/0x2b0 [ 30.892828] mmap_region+0x1f9/0x2660 [ 30.893312] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.893838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.894564] ? __pfx_lock_acquire+0x10/0x10 [ 30.895097] ? __pfx_mmap_region+0x10/0x10 [ 30.895631] ? security_mmap_addr+0x7d/0xa0 [ 30.896172] ? get_unmapped_area+0x1f5/0x3f0 [ 30.896732] do_mmap+0x854/0xf00 [ 30.897172] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.897679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.898241] ksys_mmap_pgoff+0x3af/0x500 [ 30.898766] do_syscall_64+0x3f/0x90 [ 30.899259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899910] RIP: 0033:0x7f9138796d82 [ 30.900396] 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 [ 30.902550] RSP: 002b:00007ffd73bd6228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.903464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9138796d82 [ 30.904322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9137bd0000 [ 30.905179] RBP: 00007f9137bd0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.906043] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2886feec0 [ 30.906890] R13: 00007ffd73bd6240 R14: 00007ffd73bd6270 R15: 00007ffd73bd65d0 [ 30.907761] [ 30.908063] [ 30.908281] Allocated by task 213: [ 30.908713] kasan_save_stack+0x22/0x50 [ 30.909223] kasan_set_track+0x25/0x30 [ 30.909730] __kasan_slab_alloc+0x59/0x70 [ 30.910256] kmem_cache_alloc+0x16b/0x370 [ 30.910802] vm_area_dup+0x20/0x160 [ 30.911261] __split_vma+0x170/0x950 [ 30.911751] split_vma+0xc6/0x110 [ 30.912239] mprotect_fixup+0x8d2/0xb30 [ 30.912743] do_mprotect_pkey+0x87e/0xd40 [ 30.913265] __x64_sys_mprotect+0x78/0xc0 [ 30.913790] do_syscall_64+0x3f/0x90 [ 30.914276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914930] [ 30.915144] Freed by task 213: [ 30.915540] kasan_save_stack+0x22/0x50 [ 30.916056] kasan_set_track+0x25/0x30 [ 30.916556] kasan_save_free_info+0x2b/0x50 [ 30.917090] __kasan_slab_free+0x10a/0x190 [ 30.917627] kmem_cache_free+0x10d/0x4d0 [ 30.918143] rcu_core+0x8c8/0x2860 [ 30.918596] __do_softirq+0x1b7/0x7d4 [ 30.919082] [ 30.919301] Last potentially related work creation: [ 30.919885] kasan_save_stack+0x22/0x50 [ 30.920407] __kasan_record_aux_stack+0x8e/0xa0 [ 30.920982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.921622] remove_vma+0x139/0x170 [ 30.922080] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.922637] do_vmi_munmap+0x1f1/0x2b0 [ 30.923128] __vm_munmap+0x138/0x3a0 [ 30.923596] __x64_sys_munmap+0x59/0x80 [ 30.924110] do_syscall_64+0x3f/0x90 [ 30.924597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925241] [ 30.925455] The buggy address belongs to the object at ffff88800d5c1d98 [ 30.925455] which belongs to the cache vm_area_struct of size 168 [ 30.926928] The buggy address is located 88 bytes inside of [ 30.926928] freed 168-byte region [ffff88800d5c1d98, ffff88800d5c1e40) [ 30.928353] [ 30.928568] The buggy address belongs to the physical page: [ 30.929235] page:00000000e523fa17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c1 [ 30.930318] memcg:ffff888013f3e401 [ 30.930746] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.931447] page_type: 0xffffffff() [ 30.931907] raw: 0100000000000200 ffff8880087a0c80 ffffea000034e900 dead000000000003 [ 30.932851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f3e401 [ 30.933761] page dumped because: kasan: bad access detected [ 30.934427] [ 30.934645] Memory state around the buggy address: [ 30.935223] ffff88800d5c1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.936093] ffff88800d5c1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.936954] >ffff88800d5c1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.937823] ^ [ 30.938624] ffff88800d5c1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.939480] ffff88800d5c1e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.940359] ================================================================== [ 30.941493] Disabling lock debugging due to kernel taint [ 32.722612] BUG: Bad rss-counter state mm:00000000df2d7e9d type:MM_FILEPAGES val:33 [ 32.723274] BUG: Bad rss-counter state mm:00000000df2d7e9d type:MM_ANONPAGES val:22 [ 33.233984] BUG: Bad rss-counter state mm:00000000ac23a4af type:MM_FILEPAGES val:33 [ 33.235142] BUG: Bad rss-counter state mm:00000000ac23a4af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17548' (ECDSA) to the list of known hosts. 2023/06/20 23:01:44 fuzzer started 2023/06/20 23:01:44 dialing manager at localhost:36067 2023/06/20 23:01:44 checking machine... 2023/06/20 23:01:44 checking revisions... [ 33.899216] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:01:44 testing simple program... [ 33.947939] cgroup: Unknown subsys name 'net' [ 33.995811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007fa3be8ad0a6 RSP=ffff88800f237658 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fa3be8ad0a6 R13=0000000000000000 R14=ffff88800d9a0000 R15=0000000000000024 RIP=ffffffff814c8496 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 00007fa3be3ba900 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=00007ffe23e4d000 CR3=000000000fb14000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe10748bb90 CR3=000000000f68a000 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=2033343a31303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000