syzkaller login: [ 23.721428] BUG: Bad rss-counter state mm:000000000236a150 type:MM_FILEPAGES val:33 [ 23.722678] BUG: Bad rss-counter state mm:000000000236a150 type:MM_ANONPAGES val:22 [ 23.879861] ================================================================== [ 23.880793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.881753] Read of size 8 at addr ffff888016512228 by task sshd/220 [ 23.882675] [ 23.882903] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.883800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.884854] Call Trace: [ 23.885183] [ 23.885481] dump_stack_lvl+0x91/0xf0 [ 23.885982] print_report+0xcc/0x620 [ 23.886470] ? __virt_addr_valid+0x102/0x340 [ 23.887031] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.887671] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.888290] kasan_report+0xbe/0xf0 [ 23.888775] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.889399] vma_interval_tree_remove+0xc75/0xec0 [ 23.890006] vma_prepare+0xc54/0x11a0 [ 23.890493] __split_vma+0x5af/0x950 [ 23.890972] ? __pfx___split_vma+0x10/0x10 [ 23.891509] ? find_held_lock+0x2c/0x110 [ 23.892059] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.892639] ? lock_is_held_type+0x9f/0x120 [ 23.893190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.893798] ? mtree_range_walk+0x632/0x900 [ 23.894351] ? mas_walk+0x5c7/0x7c0 [ 23.894830] do_vmi_munmap+0x1f1/0x2b0 [ 23.895325] mmap_region+0x1f9/0x2660 [ 23.895831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.896342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.897054] ? __pfx_lock_acquire+0x10/0x10 [ 23.897588] ? __pfx_mmap_region+0x10/0x10 [ 23.898125] ? security_mmap_addr+0x7d/0xa0 [ 23.898661] ? get_unmapped_area+0x1f5/0x3f0 [ 23.899213] do_mmap+0x854/0xf00 [ 23.899660] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.900158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.900717] ksys_mmap_pgoff+0x3af/0x500 [ 23.901228] do_syscall_64+0x3f/0x90 [ 23.901712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.902361] RIP: 0033:0x7fea6413cd82 [ 23.902821] 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 [ 23.904970] RSP: 002b:00007ffec0fa1f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.905875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea6413cd82 [ 23.906732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea63576000 [ 23.907584] RBP: 00007fea63576000 R08: 0000000000000009 R09: 0000000000001000 [ 23.908448] R10: 0000000000000812 R11: 0000000000000206 R12: 000055624e18cf70 [ 23.909297] R13: 00007ffec0fa1f30 R14: 00007ffec0fa1f60 R15: 00007ffec0fa22c0 [ 23.910159] [ 23.910455] [ 23.910676] Allocated by task 213: [ 23.911129] kasan_save_stack+0x22/0x50 [ 23.911639] kasan_set_track+0x25/0x30 [ 23.912139] __kasan_slab_alloc+0x59/0x70 [ 23.912667] kmem_cache_alloc+0x16b/0x370 [ 23.913182] vm_area_dup+0x20/0x160 [ 23.913636] __split_vma+0x170/0x950 [ 23.914104] split_vma+0xc6/0x110 [ 23.914546] mprotect_fixup+0x8d2/0xb30 [ 23.915051] do_mprotect_pkey+0x87e/0xd40 [ 23.915589] __x64_sys_mprotect+0x78/0xc0 [ 23.916114] do_syscall_64+0x3f/0x90 [ 23.916592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917238] [ 23.917454] Freed by task 213: [ 23.917841] kasan_save_stack+0x22/0x50 [ 23.918348] kasan_set_track+0x25/0x30 [ 23.918844] kasan_save_free_info+0x2b/0x50 [ 23.919375] __kasan_slab_free+0x10a/0x190 [ 23.919914] kmem_cache_free+0x10d/0x4d0 [ 23.920421] rcu_core+0x8c8/0x2860 [ 23.920867] __do_softirq+0x1b7/0x7d4 [ 23.921346] [ 23.921569] Last potentially related work creation: [ 23.922151] kasan_save_stack+0x22/0x50 [ 23.922653] __kasan_record_aux_stack+0x8e/0xa0 [ 23.923295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.923962] remove_vma+0x139/0x170 [ 23.924416] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.924996] do_vmi_munmap+0x1f1/0x2b0 [ 23.925490] __vm_munmap+0x138/0x3a0 [ 23.925955] __x64_sys_munmap+0x59/0x80 [ 23.926452] do_syscall_64+0x3f/0x90 [ 23.926924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.927574] [ 23.927793] The buggy address belongs to the object at ffff8880165121d0 [ 23.927793] which belongs to the cache vm_area_struct of size 168 [ 23.929286] The buggy address is located 88 bytes inside of [ 23.929286] freed 168-byte region [ffff8880165121d0, ffff888016512278) [ 23.930699] [ 23.930911] The buggy address belongs to the physical page: [ 23.931565] page:00000000f226d66e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16512 [ 23.932675] memcg:ffff88800ddbdf01 [ 23.933106] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.933751] page_type: 0xffffffff() [ 23.934200] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.935113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddbdf01 [ 23.936028] page dumped because: kasan: bad access detected [ 23.936680] [ 23.936890] Memory state around the buggy address: [ 23.937469] ffff888016512100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.938314] ffff888016512180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.939148] >ffff888016512200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.939997] ^ [ 23.940555] ffff888016512280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.941413] ffff888016512300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.942258] ================================================================== [ 23.943295] Disabling lock debugging due to kernel taint [ 25.943857] BUG: Bad rss-counter state mm:00000000393953d7 type:MM_FILEPAGES val:33 [ 25.944533] BUG: Bad rss-counter state mm:00000000393953d7 type:MM_ANONPAGES val:22 [ 26.387042] BUG: Bad rss-counter state mm:0000000067e3f4f4 type:MM_FILEPAGES val:33 [ 26.388155] BUG: Bad rss-counter state mm:0000000067e3f4f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47689' (ECDSA) to the list of known hosts. 2023/06/20 21:56:28 fuzzer started 2023/06/20 21:56:29 dialing manager at localhost:36067 2023/06/20 21:56:29 checking machine... 2023/06/20 21:56:29 checking revisions... [ 27.104655] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:56:29 testing simple program... [ 27.141546] cgroup: Unknown subsys name 'net' [ 27.193639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:28 Registers: info registers vcpu 0 RAX=1ffff11000d099a9 RBX=ffff88800684cd48 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f589ee RDI=ffff88800ffd0a58 RBP=ffff88800ffd0800 RSP=ffff8880192d7a78 R8 =0000000000000002 R9 =0000000000000019 R10=0000000000000062 R11=00000000000b6a61 R12=ffff8880192d7d68 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff81f58a1f RFL=00000216 [----AP-] 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 00007fb17bb1b900 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=00007fb17c0d0650 CR3=0000000015902000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fa155f9c160 CR3=000000001914c000 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=2038323a36353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000