syzkaller login: [ 30.581455] BUG: Bad rss-counter state mm:00000000e35746e4 type:MM_FILEPAGES val:33 [ 30.582463] BUG: Bad rss-counter state mm:00000000e35746e4 type:MM_ANONPAGES val:22 [ 30.704921] ================================================================== [ 30.705588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.706250] Read of size 8 at addr ffff88800ba0da50 by task sshd/219 [ 30.706789] [ 30.706944] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.707550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.708238] Call Trace: [ 30.708465] [ 30.708666] dump_stack_lvl+0x91/0xf0 [ 30.709017] print_report+0xcc/0x620 [ 30.709547] ? __virt_addr_valid+0x102/0x340 [ 30.709936] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710804] kasan_report+0xbe/0xf0 [ 30.711141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711578] vma_interval_tree_remove+0xc75/0xec0 [ 30.712034] vma_prepare+0xc54/0x11a0 [ 30.712375] __split_vma+0x5af/0x950 [ 30.712694] ? __pfx___split_vma+0x10/0x10 [ 30.712983] ? find_held_lock+0x2c/0x110 [ 30.713271] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.713580] ? lock_is_held_type+0x9f/0x120 [ 30.713876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.714206] ? mtree_range_walk+0x632/0x900 [ 30.714509] ? mas_walk+0x5c7/0x7c0 [ 30.714769] do_vmi_munmap+0x1f1/0x2b0 [ 30.715039] mmap_region+0x1f9/0x2660 [ 30.715303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.715585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.715980] ? __pfx_lock_acquire+0x10/0x10 [ 30.716273] ? __pfx_mmap_region+0x10/0x10 [ 30.716564] ? security_mmap_addr+0x7d/0xa0 [ 30.716861] ? get_unmapped_area+0x1f5/0x3f0 [ 30.717160] do_mmap+0x854/0xf00 [ 30.717402] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.717674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.717980] ksys_mmap_pgoff+0x3af/0x500 [ 30.718258] do_syscall_64+0x3f/0x90 [ 30.718521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718875] RIP: 0033:0x7fdbafbfdd82 [ 30.719125] 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 [ 30.720277] RSP: 002b:00007ffe07c913d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.720769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbafbfdd82 [ 30.721259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbaf037000 [ 30.721719] RBP: 00007fdbaf037000 R08: 0000000000000009 R09: 0000000000001000 [ 30.722179] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a88aa6bec0 [ 30.722639] R13: 00007ffe07c913f0 R14: 00007ffe07c91420 R15: 00007ffe07c91780 [ 30.723102] [ 30.723261] [ 30.723379] Allocated by task 212: [ 30.723612] kasan_save_stack+0x22/0x50 [ 30.723904] kasan_set_track+0x25/0x30 [ 30.724172] __kasan_slab_alloc+0x59/0x70 [ 30.724457] kmem_cache_alloc+0x16b/0x370 [ 30.724738] vm_area_dup+0x20/0x160 [ 30.724986] __split_vma+0x170/0x950 [ 30.725239] split_vma+0xc6/0x110 [ 30.725479] mprotect_fixup+0x8d2/0xb30 [ 30.725758] do_mprotect_pkey+0x87e/0xd40 [ 30.726041] __x64_sys_mprotect+0x78/0xc0 [ 30.726325] do_syscall_64+0x3f/0x90 [ 30.726583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.726930] [ 30.727049] Freed by task 209: [ 30.727262] kasan_save_stack+0x22/0x50 [ 30.727536] kasan_set_track+0x25/0x30 [ 30.727810] kasan_save_free_info+0x2b/0x50 [ 30.728099] __kasan_slab_free+0x10a/0x190 [ 30.728388] kmem_cache_free+0x10d/0x4d0 [ 30.728666] rcu_core+0x8c8/0x2860 [ 30.728911] __do_softirq+0x1b7/0x7d4 [ 30.729170] [ 30.729288] Last potentially related work creation: [ 30.729605] kasan_save_stack+0x22/0x50 [ 30.729884] __kasan_record_aux_stack+0x8e/0xa0 [ 30.730194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.730543] remove_vma+0x139/0x170 [ 30.730789] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.731090] do_vmi_munmap+0x1f1/0x2b0 [ 30.731354] __vm_munmap+0x138/0x3a0 [ 30.731608] __x64_sys_munmap+0x59/0x80 [ 30.731888] do_syscall_64+0x3f/0x90 [ 30.732145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732492] [ 30.732610] The buggy address belongs to the object at ffff88800ba0d9f8 [ 30.732610] which belongs to the cache vm_area_struct of size 168 [ 30.733394] The buggy address is located 88 bytes inside of [ 30.733394] freed 168-byte region [ffff88800ba0d9f8, ffff88800ba0daa0) [ 30.734143] [ 30.734261] The buggy address belongs to the physical page: [ 30.734616] page:0000000024fa0d5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba0d [ 30.735201] memcg:ffff88800ddc1001 [ 30.735432] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.735796] page_type: 0xffffffff() [ 30.736042] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.736540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddc1001 [ 30.737026] page dumped because: kasan: bad access detected [ 30.737381] [ 30.737502] Memory state around the buggy address: [ 30.737817] ffff88800ba0d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.738276] ffff88800ba0d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.738736] >ffff88800ba0da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.739195] ^ [ 30.739573] ffff88800ba0da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.740043] ffff88800ba0db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.740500] ================================================================== [ 30.741044] Disabling lock debugging due to kernel taint [ 32.913484] BUG: Bad rss-counter state mm:00000000a0aa2bc5 type:MM_FILEPAGES val:33 [ 32.914892] BUG: Bad rss-counter state mm:00000000a0aa2bc5 type:MM_ANONPAGES val:22 [ 33.424468] BUG: Bad rss-counter state mm:0000000083926ef0 type:MM_FILEPAGES val:33 [ 33.425426] BUG: Bad rss-counter state mm:0000000083926ef0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37650' (ECDSA) to the list of known hosts. 2023/06/20 09:42:21 fuzzer started 2023/06/20 09:42:21 dialing manager at localhost:44161 2023/06/20 09:42:21 checking machine... 2023/06/20 09:42:21 checking revisions... [ 34.056459] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:42:21 testing simple program... [ 34.106960] cgroup: Unknown subsys name 'net' [ 34.153232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000288 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000d78 RDI=ffff88800de6ff80 RBP=ffff88800de6ff80 RSP=ffff8880163579e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000d78 R13=0000000000000282 R14=0000000000000dc0 R15=ffff88801468a000 RIP=ffffffff8183042c RFL=00000082 [--S----] 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 00007fbf592e1900 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=00007fbf598990b0 CR3=000000000e726000 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=0000000080000000 RBX=ffff88800db4e0c0 RCX=0000000080000000 RDX=ffff888010343680 RSI=ffffffff83636f7d RDI=ffff88800c906000 RBP=ffff88801477fda8 RSP=ffff88801477fc08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801477fda8 R13=ffff88800c906000 R14=ffffffff83636f60 R15=0000000000000001 RIP=ffffffff814c07f1 RFL=00000282 [--S----] 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 00007fb72eca5900 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=00007fb72e0ddf70 CR3=000000000d65a000 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=9392914819802ea90747a05a4d382ef1 XMM02=ec2efd57dc4c00df000000000011fb20 XMM03=14e46d609a60ca16000000000011fbf0 XMM04=538866914d837d6400000000000ae988 XMM05=dfcdbad4f1609c370000000000133e98 XMM06=aeca3f146b9b9d410000000000132d00 XMM07=e042d86d42eb936e0000000000124578 XMM08=14e46d609a60ca16000000000011fbf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000