syzkaller login: [ 60.411434] BUG: Bad rss-counter state mm:00000000d97ed0df type:MM_FILEPAGES val:33 [ 60.412655] BUG: Bad rss-counter state mm:00000000d97ed0df type:MM_ANONPAGES val:22 [ 60.577607] ================================================================== [ 60.578527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.579493] Read of size 8 at addr ffff88800e25e140 by task sshd/219 [ 60.580290] [ 60.580510] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.581549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.582559] Call Trace: [ 60.582891] [ 60.583190] dump_stack_lvl+0x91/0xf0 [ 60.583695] print_report+0xcc/0x620 [ 60.584213] ? __virt_addr_valid+0x102/0x340 [ 60.584779] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.585418] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.586057] kasan_report+0xbe/0xf0 [ 60.586544] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.587181] vma_interval_tree_remove+0xc75/0xec0 [ 60.587789] vma_prepare+0xc54/0x11a0 [ 60.588287] __split_vma+0x5af/0x950 [ 60.588761] ? __pfx___split_vma+0x10/0x10 [ 60.589306] ? find_held_lock+0x2c/0x110 [ 60.589826] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.590400] ? lock_is_held_type+0x9f/0x120 [ 60.590951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.591559] ? mtree_range_walk+0x632/0x900 [ 60.592108] ? mas_walk+0x5c7/0x7c0 [ 60.592594] do_vmi_munmap+0x1f1/0x2b0 [ 60.593096] mmap_region+0x1f9/0x2660 [ 60.593577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.594091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.594810] ? __pfx_lock_acquire+0x10/0x10 [ 60.595351] ? __pfx_mmap_region+0x10/0x10 [ 60.595891] ? security_mmap_addr+0x7d/0xa0 [ 60.596447] ? get_unmapped_area+0x1f5/0x3f0 [ 60.597013] do_mmap+0x854/0xf00 [ 60.597449] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.597967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.598545] ksys_mmap_pgoff+0x3af/0x500 [ 60.599076] do_syscall_64+0x3f/0x90 [ 60.599557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.600225] RIP: 0033:0x7f28e60ebd82 [ 60.600684] 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 [ 60.602840] RSP: 002b:00007ffe0ca308e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.603750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28e60ebd82 [ 60.604624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28e5525000 [ 60.605480] RBP: 00007f28e5525000 R08: 0000000000000009 R09: 0000000000001000 [ 60.606333] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562955592f60 [ 60.607190] R13: 00007ffe0ca30900 R14: 00007ffe0ca30930 R15: 00007ffe0ca30c90 [ 60.608056] [ 60.608383] [ 60.608604] Allocated by task 212: [ 60.609034] kasan_save_stack+0x22/0x50 [ 60.609543] kasan_set_track+0x25/0x30 [ 60.610043] __kasan_slab_alloc+0x59/0x70 [ 60.610569] kmem_cache_alloc+0x16b/0x370 [ 60.611083] vm_area_dup+0x20/0x160 [ 60.611542] __split_vma+0x170/0x950 [ 60.612013] split_vma+0xc6/0x110 [ 60.612471] mprotect_fixup+0x8d2/0xb30 [ 60.612984] do_mprotect_pkey+0x87e/0xd40 [ 60.613507] __x64_sys_mprotect+0x78/0xc0 [ 60.614040] do_syscall_64+0x3f/0x90 [ 60.614514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.615159] [ 60.615383] Freed by task 212: [ 60.615784] kasan_save_stack+0x22/0x50 [ 60.616301] kasan_set_track+0x25/0x30 [ 60.616795] kasan_save_free_info+0x2b/0x50 [ 60.617333] __kasan_slab_free+0x10a/0x190 [ 60.617870] kmem_cache_free+0x10d/0x4d0 [ 60.618383] rcu_core+0x8c8/0x2860 [ 60.618833] __do_softirq+0x1b7/0x7d4 [ 60.619315] [ 60.619528] Last potentially related work creation: [ 60.620137] kasan_save_stack+0x22/0x50 [ 60.620648] __kasan_record_aux_stack+0x8e/0xa0 [ 60.621230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.621882] remove_vma+0x139/0x170 [ 60.622421] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.622980] do_vmi_munmap+0x1f1/0x2b0 [ 60.623472] __vm_munmap+0x138/0x3a0 [ 60.623947] __x64_sys_munmap+0x59/0x80 [ 60.624466] do_syscall_64+0x3f/0x90 [ 60.624944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.625591] [ 60.625808] The buggy address belongs to the object at ffff88800e25e0e8 [ 60.625808] which belongs to the cache vm_area_struct of size 168 [ 60.627274] The buggy address is located 88 bytes inside of [ 60.627274] freed 168-byte region [ffff88800e25e0e8, ffff88800e25e190) [ 60.628687] [ 60.628905] The buggy address belongs to the physical page: [ 60.629560] page:00000000c8e1d6c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe25e [ 60.630650] memcg:ffff88801a05c301 [ 60.631085] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.631740] page_type: 0xffffffff() [ 60.632219] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.633143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a05c301 [ 60.634059] page dumped because: kasan: bad access detected [ 60.634723] [ 60.634943] Memory state around the buggy address: [ 60.635517] ffff88800e25e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.636387] ffff88800e25e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 60.637245] >ffff88800e25e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.638090] ^ [ 60.638723] ffff88800e25e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.639579] ffff88800e25e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.640440] ================================================================== [ 60.641493] Disabling lock debugging due to kernel taint [ 62.651626] BUG: Bad rss-counter state mm:000000008a15b467 type:MM_FILEPAGES val:33 [ 62.652910] BUG: Bad rss-counter state mm:000000008a15b467 type:MM_ANONPAGES val:22 [ 63.134135] BUG: Bad rss-counter state mm:00000000ac6cd1b9 type:MM_FILEPAGES val:33 [ 63.135289] BUG: Bad rss-counter state mm:00000000ac6cd1b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35403' (ECDSA) to the list of known hosts. 2023/06/20 03:16:18 fuzzer started 2023/06/20 03:16:18 dialing manager at localhost:44161 2023/06/20 03:16:18 checking machine... 2023/06/20 03:16:18 checking revisions... [ 63.720460] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:16:18 testing simple program... [ 63.768183] cgroup: Unknown subsys name 'net' [ 63.832290] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:16:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019f0d1c0 RSI=ffffffff81710f7f RDI=ffffea000058be40 RBP=ffff888015dcfd90 RSP=ffff888015dcfbf8 R8 =0000000000000000 R9 =fffff940000b17c8 R10=ffffea000058be47 R11=0000000000000000 R12=ffffea000058be40 R13=ffff88800fb783a0 R14=ffff888015dcfdb8 R15=ffffea000058be74 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f148d785900 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=00007f148e2d9044 CR3=000000000fb4e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a 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=00007fd486f0cf30 CR3=000000000c5be000 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=a9749150ce28d78adb459e2527239da1 XMM02=2c67c8bc2e329bc3000000000011f520 XMM03=fb795ef6d65770560000000000123be8 XMM04=33af4e9076a9366c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133748 XMM06=b3dce72a9a04a8be00000000001325b0 XMM07=e042d86d42eb936e0000000000123e68 XMM08=345d9c2c8ebd1306000000000011f580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000