syzkaller login: [ 31.540470] BUG: Bad rss-counter state mm:000000002190960c type:MM_FILEPAGES val:33 [ 31.542597] BUG: Bad rss-counter state mm:000000002190960c type:MM_ANONPAGES val:22 [ 31.708616] ================================================================== [ 31.709689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.710933] Read of size 8 at addr ffff88800dd104e0 by task sshd/220 [ 31.711868] [ 31.712130] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.713219] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.714260] Call Trace: [ 31.714602] [ 31.714902] dump_stack_lvl+0x91/0xf0 [ 31.715436] print_report+0xcc/0x620 [ 31.715951] ? __virt_addr_valid+0x102/0x340 [ 31.716537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717881] kasan_report+0xbe/0xf0 [ 31.718404] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.719089] vma_interval_tree_remove+0xc75/0xec0 [ 31.719775] vma_prepare+0xc54/0x11a0 [ 31.720300] __split_vma+0x5af/0x950 [ 31.720821] ? __pfx___split_vma+0x10/0x10 [ 31.721407] ? find_held_lock+0x2c/0x110 [ 31.721977] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.722602] ? lock_is_held_type+0x9f/0x120 [ 31.723195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.723869] ? mtree_range_walk+0x632/0x900 [ 31.724483] ? mas_walk+0x5c7/0x7c0 [ 31.725001] do_vmi_munmap+0x1f1/0x2b0 [ 31.725545] mmap_region+0x1f9/0x2660 [ 31.726077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.726637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.727445] ? __pfx_lock_acquire+0x10/0x10 [ 31.728025] ? __pfx_mmap_region+0x10/0x10 [ 31.728611] ? security_mmap_addr+0x7d/0xa0 [ 31.729198] ? get_unmapped_area+0x1f5/0x3f0 [ 31.729806] do_mmap+0x854/0xf00 [ 31.730292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.730836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.731463] ksys_mmap_pgoff+0x3af/0x500 [ 31.732005] do_syscall_64+0x3f/0x90 [ 31.732516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.733208] RIP: 0033:0x7faeb34f2d82 [ 31.733693] 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 [ 31.735971] RSP: 002b:00007ffdb1bc9fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.736941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faeb34f2d82 [ 31.737848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faeb292c000 [ 31.738755] RBP: 00007faeb292c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.739687] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef00f3aec0 [ 31.740612] R13: 00007ffdb1bc9fd0 R14: 00007ffdb1bca000 R15: 00007ffdb1bca360 [ 31.741559] [ 31.741878] [ 31.742108] Allocated by task 213: [ 31.742573] kasan_save_stack+0x22/0x50 [ 31.743117] kasan_set_track+0x25/0x30 [ 31.743651] __kasan_slab_alloc+0x59/0x70 [ 31.744211] kmem_cache_alloc+0x16b/0x370 [ 31.744761] vm_area_dup+0x20/0x160 [ 31.745250] __split_vma+0x170/0x950 [ 31.745744] split_vma+0xc6/0x110 [ 31.746214] mprotect_fixup+0x8d2/0xb30 [ 31.746751] do_mprotect_pkey+0x87e/0xd40 [ 31.747306] __x64_sys_mprotect+0x78/0xc0 [ 31.747872] do_syscall_64+0x3f/0x90 [ 31.748378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.749056] [ 31.749283] Freed by task 213: [ 31.749701] kasan_save_stack+0x22/0x50 [ 31.750231] kasan_set_track+0x25/0x30 [ 31.750753] kasan_save_free_info+0x2b/0x50 [ 31.751319] __kasan_slab_free+0x10a/0x190 [ 31.751894] kmem_cache_free+0x10d/0x4d0 [ 31.752437] rcu_core+0x8c8/0x2860 [ 31.752907] __do_softirq+0x1b7/0x7d4 [ 31.753416] [ 31.753646] Last potentially related work creation: [ 31.754270] kasan_save_stack+0x22/0x50 [ 31.754805] __kasan_record_aux_stack+0x8e/0xa0 [ 31.755432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.756115] remove_vma+0x139/0x170 [ 31.756597] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.757187] do_vmi_munmap+0x1f1/0x2b0 [ 31.757712] __vm_munmap+0x138/0x3a0 [ 31.758220] __x64_sys_munmap+0x59/0x80 [ 31.758748] do_syscall_64+0x3f/0x90 [ 31.759253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.759960] [ 31.760194] The buggy address belongs to the object at ffff88800dd10488 [ 31.760194] which belongs to the cache vm_area_struct of size 168 [ 31.761773] The buggy address is located 88 bytes inside of [ 31.761773] freed 168-byte region [ffff88800dd10488, ffff88800dd10530) [ 31.763268] [ 31.763504] The buggy address belongs to the physical page: [ 31.764211] page:0000000031aa084f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd10 [ 31.765363] memcg:ffff88800dd17d01 [ 31.765809] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.766507] page_type: 0xffffffff() [ 31.766992] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.767989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd17d01 [ 31.768973] page dumped because: kasan: bad access detected [ 31.769691] [ 31.769923] Memory state around the buggy address: [ 31.770561] ffff88800dd10380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.771530] ffff88800dd10400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.772454] >ffff88800dd10480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.773368] ^ [ 31.774182] ffff88800dd10500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.775110] ffff88800dd10580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.776050] ================================================================== [ 31.777260] Disabling lock debugging due to kernel taint [ 33.934324] BUG: Bad rss-counter state mm:00000000c47d69fa type:MM_FILEPAGES val:33 [ 33.935129] BUG: Bad rss-counter state mm:00000000c47d69fa type:MM_ANONPAGES val:22 [ 34.421359] BUG: Bad rss-counter state mm:00000000d04f586e type:MM_FILEPAGES val:33 [ 34.422550] BUG: Bad rss-counter state mm:00000000d04f586e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38635' (ECDSA) to the list of known hosts. 2023/06/19 15:56:18 fuzzer started 2023/06/19 15:56:18 dialing manager at localhost:44161 2023/06/19 15:56:18 checking machine... 2023/06/19 15:56:18 checking revisions... [ 35.122025] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:56:19 testing simple program... [ 35.170566] cgroup: Unknown subsys name 'net' [ 35.219073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:17 Registers: info registers vcpu 0 RAX=ffffffff8613dd30 RBX=0000000000000001 RCX=ffffffff81847451 RDX=0000000000000000 RSI=ffffffff8613dd30 RDI=ffffffff85e00f6c RBP=ffff88801036f4e8 RSP=ffff88801036f418 R8 =ffffffff8613dd30 R9 =ffff88801036f4d0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88801036f4f0 R13=ffff88801036f4d8 R14=ffff88801036f4d1 R15=ffff88801036f490 RIP=ffffffff8112fcc1 RFL=00000286 [--S--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 00007f03b5f4a900 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=00007ffccd64a000 CR3=000000000c49e000 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=ffffffff81161490 RBX=00000000000000ab RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888019cf0000 RBP=00000000000000ac RSP=ffff88806cf09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888019cf0000 RIP=ffffffff81161494 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 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=00007fbfdfa8eeb0 CR3=000000000ef62000 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=2038313a36353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a36353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000