syzkaller login: [ 38.698736] BUG: Bad rss-counter state mm:00000000c3a26c8b type:MM_FILEPAGES val:33 [ 38.699852] BUG: Bad rss-counter state mm:00000000c3a26c8b type:MM_ANONPAGES val:22 [ 38.880635] ================================================================== [ 38.881656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882651] Read of size 8 at addr ffff888016c944e0 by task sshd/218 [ 38.883592] [ 38.883830] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.884790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885871] Call Trace: [ 38.886210] [ 38.886520] dump_stack_lvl+0x91/0xf0 [ 38.887048] print_report+0xcc/0x620 [ 38.887583] ? __virt_addr_valid+0x102/0x340 [ 38.888178] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888868] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889527] kasan_report+0xbe/0xf0 [ 38.890044] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890716] vma_interval_tree_remove+0xc75/0xec0 [ 38.891376] vma_prepare+0xc54/0x11a0 [ 38.891899] __split_vma+0x5af/0x950 [ 38.892414] ? __pfx___split_vma+0x10/0x10 [ 38.892995] ? find_held_lock+0x2c/0x110 [ 38.893565] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894180] ? lock_is_held_type+0x9f/0x120 [ 38.894766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895425] ? mtree_range_walk+0x632/0x900 [ 38.896028] ? mas_walk+0x5c7/0x7c0 [ 38.896545] do_vmi_munmap+0x1f1/0x2b0 [ 38.897109] mmap_region+0x1f9/0x2660 [ 38.897630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.898182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898949] ? __pfx_lock_acquire+0x10/0x10 [ 38.899525] ? __pfx_mmap_region+0x10/0x10 [ 38.900100] ? security_mmap_addr+0x7d/0xa0 [ 38.900669] ? get_unmapped_area+0x1f5/0x3f0 [ 38.901274] do_mmap+0x854/0xf00 [ 38.901759] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.903030] ksys_mmap_pgoff+0x3af/0x500 [ 38.903585] do_syscall_64+0x3f/0x90 [ 38.904097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904817] RIP: 0033:0x7ff3d53a1d82 [ 38.905306] 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 [ 38.907573] RSP: 002b:00007ffdd2778098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908541] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3d53a1d82 [ 38.909453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3d47db000 [ 38.910351] RBP: 00007ff3d47db000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911254] R10: 0000000000000812 R11: 0000000000000206 R12: 000055658cf52ec0 [ 38.912142] R13: 00007ffdd27780b0 R14: 00007ffdd27780e0 R15: 00007ffdd2778440 [ 38.913062] [ 38.913369] [ 38.913594] Allocated by task 211: [ 38.914046] kasan_save_stack+0x22/0x50 [ 38.914580] kasan_set_track+0x25/0x30 [ 38.915094] __kasan_slab_alloc+0x59/0x70 [ 38.915653] kmem_cache_alloc+0x16b/0x370 [ 38.916203] vm_area_dup+0x20/0x160 [ 38.916678] __split_vma+0x170/0x950 [ 38.917190] split_vma+0xc6/0x110 [ 38.917646] mprotect_fixup+0x8d2/0xb30 [ 38.918166] do_mprotect_pkey+0x87e/0xd40 [ 38.918714] __x64_sys_mprotect+0x78/0xc0 [ 38.919260] do_syscall_64+0x3f/0x90 [ 38.919755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920421] [ 38.920648] Freed by task 211: [ 38.921065] kasan_save_stack+0x22/0x50 [ 38.921594] kasan_set_track+0x25/0x30 [ 38.922116] kasan_save_free_info+0x2b/0x50 [ 38.922668] __kasan_slab_free+0x10a/0x190 [ 38.923220] kmem_cache_free+0x10d/0x4d0 [ 38.923762] rcu_core+0x8c8/0x2860 [ 38.924224] __do_softirq+0x1b7/0x7d4 [ 38.924729] [ 38.924978] Last potentially related work creation: [ 38.925604] kasan_save_stack+0x22/0x50 [ 38.926130] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927405] remove_vma+0x139/0x170 [ 38.927876] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928461] do_vmi_munmap+0x1f1/0x2b0 [ 38.928977] __vm_munmap+0x138/0x3a0 [ 38.929467] __x64_sys_munmap+0x59/0x80 [ 38.929987] do_syscall_64+0x3f/0x90 [ 38.930470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931129] [ 38.931355] The buggy address belongs to the object at ffff888016c94488 [ 38.931355] which belongs to the cache vm_area_struct of size 168 [ 38.932891] The buggy address is located 88 bytes inside of [ 38.932891] freed 168-byte region [ffff888016c94488, ffff888016c94530) [ 38.934342] [ 38.934563] The buggy address belongs to the physical page: [ 38.935243] page:00000000fffe5a53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c94 [ 38.936363] memcg:ffff888009a76701 [ 38.936819] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.937478] page_type: 0xffffffff() [ 38.937949] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.938907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a76701 [ 38.939843] page dumped because: kasan: bad access detected [ 38.940524] [ 38.940749] Memory state around the buggy address: [ 38.941362] ffff888016c94380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.942249] ffff888016c94400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.943132] >ffff888016c94480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944002] ^ [ 38.944782] ffff888016c94500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.945665] ffff888016c94580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.946544] ================================================================== [ 38.947646] Disabling lock debugging due to kernel taint [ 41.196889] BUG: Bad rss-counter state mm:000000001352acd9 type:MM_FILEPAGES val:33 [ 41.198136] BUG: Bad rss-counter state mm:000000001352acd9 type:MM_ANONPAGES val:22 [ 41.659454] BUG: Bad rss-counter state mm:00000000be4b5a4a type:MM_FILEPAGES val:33 [ 41.660575] BUG: Bad rss-counter state mm:00000000be4b5a4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42653' (ECDSA) to the list of known hosts. 2023/06/20 02:22:53 fuzzer started 2023/06/20 02:22:53 dialing manager at localhost:44161 2023/06/20 02:22:53 checking machine... 2023/06/20 02:22:53 checking revisions... [ 42.410612] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:22:53 testing simple program... [ 42.470112] cgroup: Unknown subsys name 'net' [ 42.536558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:22:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055c428b87ed0 RCX=000000000000000a RDX=0000000000000a66 RSI=000000000000000a RDI=000055c428b96420 RBP=00007ffe074e2410 RSP=00007ffe074e23a8 R8 =000055c428b9642a R9 =00007f58e6560be0 R10=000000000000006f R11=0000000000000246 R12=00007f58e5fae900 R13=00007ffe074e2418 R14=0000000000000a66 R15=0000000000000000 RIP=00007f58e64fd9c1 RFL=00000257 [---ZAPC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f58e5fae900 00000000 00000000 GS =0000 0000000000000000 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=00007f58e6563650 CR3=0000000018252000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000ff000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=61726f706d6574206120736920736968 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880166af828 RCX=0000000000000001 RDX=1ffff11002cd5f10 RSI=ffff8880166afe28 RDI=ffff8880166af828 RBP=ffff8880166af880 RSP=ffff8880166af810 R8 =0000000000000001 R9 =ffff8880166af868 R10=0000000000038001 R11=00000000000229dc R12=ffff8880166af8f0 R13=0000000000000000 R14=ffff88800d99b680 R15=0000000000092cc0 RIP=ffffffff8113038e 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 00007f58e5fae900 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=00007f58e65660b0 CR3=0000000018252000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000