syzkaller login: [ 60.515313] BUG: Bad rss-counter state mm:00000000788678d8 type:MM_FILEPAGES val:33 [ 60.516144] BUG: Bad rss-counter state mm:00000000788678d8 type:MM_ANONPAGES val:22 [ 60.641204] ================================================================== [ 60.642288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.643415] Read of size 8 at addr ffff88800c57eed8 by task sshd/222 [ 60.644417] [ 60.644677] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.645193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.645729] Call Trace: [ 60.645919] [ 60.646076] dump_stack_lvl+0x91/0xf0 [ 60.646355] print_report+0xcc/0x620 [ 60.646624] ? __virt_addr_valid+0x102/0x340 [ 60.646939] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.647275] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.647612] kasan_report+0xbe/0xf0 [ 60.647871] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.648210] vma_interval_tree_remove+0xc75/0xec0 [ 60.648539] vma_prepare+0xc54/0x11a0 [ 60.648812] __split_vma+0x5af/0x950 [ 60.649077] ? __pfx___split_vma+0x10/0x10 [ 60.649365] ? find_held_lock+0x2c/0x110 [ 60.649655] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.649969] ? lock_is_held_type+0x9f/0x120 [ 60.650266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.650597] ? mtree_range_walk+0x632/0x900 [ 60.650903] ? mas_walk+0x5c7/0x7c0 [ 60.651164] do_vmi_munmap+0x1f1/0x2b0 [ 60.651437] mmap_region+0x1f9/0x2660 [ 60.651702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.651984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.652374] ? __pfx_lock_acquire+0x10/0x10 [ 60.652666] ? __pfx_mmap_region+0x10/0x10 [ 60.652970] ? security_mmap_addr+0x7d/0xa0 [ 60.653263] ? get_unmapped_area+0x1f5/0x3f0 [ 60.653567] do_mmap+0x854/0xf00 [ 60.653811] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.654084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.654392] ksys_mmap_pgoff+0x3af/0x500 [ 60.654671] do_syscall_64+0x3f/0x90 [ 60.654932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.655287] RIP: 0033:0x7f6e92948d82 [ 60.655536] 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 [ 60.656702] RSP: 002b:00007ffdd819e948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.657206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e92948d82 [ 60.657674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e91d82000 [ 60.658141] RBP: 00007f6e91d82000 R08: 0000000000000009 R09: 0000000000001000 [ 60.658613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bded714ec0 [ 60.659077] R13: 00007ffdd819e960 R14: 00007ffdd819e990 R15: 00007ffdd819ecf0 [ 60.659547] [ 60.659706] [ 60.659823] Allocated by task 213: [ 60.660059] kasan_save_stack+0x22/0x50 [ 60.660337] kasan_set_track+0x25/0x30 [ 60.660604] __kasan_slab_alloc+0x59/0x70 [ 60.660905] kmem_cache_alloc+0x16b/0x370 [ 60.661195] vm_area_dup+0x20/0x160 [ 60.661447] __split_vma+0x170/0x950 [ 60.661702] split_vma+0xc6/0x110 [ 60.661944] mprotect_fixup+0x8d2/0xb30 [ 60.662222] do_mprotect_pkey+0x87e/0xd40 [ 60.662508] __x64_sys_mprotect+0x78/0xc0 [ 60.662793] do_syscall_64+0x3f/0x90 [ 60.663054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.663404] [ 60.663523] Freed by task 203: [ 60.663741] kasan_save_stack+0x22/0x50 [ 60.664017] kasan_set_track+0x25/0x30 [ 60.664284] kasan_save_free_info+0x2b/0x50 [ 60.664578] __kasan_slab_free+0x10a/0x190 [ 60.664875] kmem_cache_free+0x10d/0x4d0 [ 60.665157] rcu_core+0x8c8/0x2860 [ 60.665398] __do_softirq+0x1b7/0x7d4 [ 60.665661] [ 60.665778] Last potentially related work creation: [ 60.666101] kasan_save_stack+0x22/0x50 [ 60.666377] __kasan_record_aux_stack+0x8e/0xa0 [ 60.666688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.667041] remove_vma+0x139/0x170 [ 60.667290] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.667596] do_vmi_munmap+0x1f1/0x2b0 [ 60.667867] __vm_munmap+0x138/0x3a0 [ 60.668123] __x64_sys_munmap+0x59/0x80 [ 60.668395] do_syscall_64+0x3f/0x90 [ 60.668656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.669016] [ 60.669136] The buggy address belongs to the object at ffff88800c57ee80 [ 60.669136] which belongs to the cache vm_area_struct of size 168 [ 60.669963] The buggy address is located 88 bytes inside of [ 60.669963] freed 168-byte region [ffff88800c57ee80, ffff88800c57ef28) [ 60.670748] [ 60.670873] The buggy address belongs to the physical page: [ 60.671242] page:000000002a1e604e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc57e [ 60.671837] memcg:ffff88800aafc501 [ 60.672083] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.672456] page_type: 0xffffffff() [ 60.672713] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.673243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800aafc501 [ 60.673754] page dumped because: kasan: bad access detected [ 60.674134] [ 60.674258] Memory state around the buggy address: [ 60.674578] ffff88800c57ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.675051] ffff88800c57ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.675533] >ffff88800c57ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.676010] ^ [ 60.676415] ffff88800c57ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.676922] ffff88800c57ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.677401] ================================================================== [ 60.678050] Disabling lock debugging due to kernel taint [ 62.434884] BUG: Bad rss-counter state mm:000000005e7c524b type:MM_FILEPAGES val:33 [ 62.436065] BUG: Bad rss-counter state mm:000000005e7c524b type:MM_ANONPAGES val:22 [ 62.877237] BUG: Bad rss-counter state mm:00000000ce0c6a87 type:MM_FILEPAGES val:33 [ 62.878223] BUG: Bad rss-counter state mm:00000000ce0c6a87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15612' (ECDSA) to the list of known hosts. 2023/06/20 16:20:43 fuzzer started 2023/06/20 16:20:43 dialing manager at localhost:36067 2023/06/20 16:20:43 checking machine... 2023/06/20 16:20:43 checking revisions... [ 63.565006] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:20:43 testing simple program... [ 63.628989] cgroup: Unknown subsys name 'net' [ 63.666628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801647b680 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016b1f2f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000002000 RIP=ffffffff813744b6 RFL=00000293 [--S-A-C] 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 00007fb1790d3900 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=00007ffcba61a000 CR3=00000000196b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f08dec48030 CR3=000000000ecb0000 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=2032343a30323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000