syzkaller login: [ 50.411686] BUG: Bad rss-counter state mm:00000000572d80f9 type:MM_FILEPAGES val:33 [ 50.413063] BUG: Bad rss-counter state mm:00000000572d80f9 type:MM_ANONPAGES val:22 [ 50.565667] ================================================================== [ 50.566590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.567546] Read of size 8 at addr ffff88800c48e5c8 by task sshd/219 [ 50.568338] [ 50.568665] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.569546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.570537] Call Trace: [ 50.570972] [ 50.571316] dump_stack_lvl+0x91/0xf0 [ 50.571915] print_report+0xcc/0x620 [ 50.572492] ? __virt_addr_valid+0x102/0x340 [ 50.573144] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.573870] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.574609] kasan_report+0xbe/0xf0 [ 50.575181] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.575926] vma_interval_tree_remove+0xc75/0xec0 [ 50.576637] vma_prepare+0xc54/0x11a0 [ 50.577199] __split_vma+0x5af/0x950 [ 50.577764] ? __pfx___split_vma+0x10/0x10 [ 50.578392] ? find_held_lock+0x2c/0x110 [ 50.579007] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.579671] ? lock_is_held_type+0x9f/0x120 [ 50.580340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.581021] ? mtree_range_walk+0x632/0x900 [ 50.581573] ? mas_walk+0x5c7/0x7c0 [ 50.582046] do_vmi_munmap+0x1f1/0x2b0 [ 50.582534] mmap_region+0x1f9/0x2660 [ 50.583013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.583519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.584241] ? __pfx_lock_acquire+0x10/0x10 [ 50.584777] ? __pfx_mmap_region+0x10/0x10 [ 50.585319] ? security_mmap_addr+0x7d/0xa0 [ 50.585850] ? get_unmapped_area+0x1f5/0x3f0 [ 50.586402] do_mmap+0x854/0xf00 [ 50.586846] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.587345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.587914] ksys_mmap_pgoff+0x3af/0x500 [ 50.588420] do_syscall_64+0x3f/0x90 [ 50.588893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.589537] RIP: 0033:0x7fb11a446d82 [ 50.589995] 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 [ 50.592132] RSP: 002b:00007ffcc5ceecb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.593041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb11a446d82 [ 50.593881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb119880000 [ 50.594722] RBP: 00007fb119880000 R08: 0000000000000009 R09: 0000000000001000 [ 50.595569] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a45e641ec0 [ 50.596434] R13: 00007ffcc5ceecd0 R14: 00007ffcc5ceed00 R15: 00007ffcc5cef060 [ 50.597299] [ 50.597589] [ 50.597804] Allocated by task 212: [ 50.598232] kasan_save_stack+0x22/0x50 [ 50.598735] kasan_set_track+0x25/0x30 [ 50.599228] __kasan_slab_alloc+0x59/0x70 [ 50.599756] kmem_cache_alloc+0x16b/0x370 [ 50.600295] vm_area_dup+0x20/0x160 [ 50.600751] __split_vma+0x170/0x950 [ 50.601217] split_vma+0xc6/0x110 [ 50.601655] mprotect_fixup+0x8d2/0xb30 [ 50.602153] do_mprotect_pkey+0x87e/0xd40 [ 50.602677] __x64_sys_mprotect+0x78/0xc0 [ 50.603194] do_syscall_64+0x3f/0x90 [ 50.603664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.604316] [ 50.604529] Freed by task 212: [ 50.604921] kasan_save_stack+0x22/0x50 [ 50.605440] kasan_set_track+0x25/0x30 [ 50.605935] kasan_save_free_info+0x2b/0x50 [ 50.606474] __kasan_slab_free+0x10a/0x190 [ 50.607006] kmem_cache_free+0x10d/0x4d0 [ 50.607510] rcu_core+0x8c8/0x2860 [ 50.607959] __do_softirq+0x1b7/0x7d4 [ 50.608439] [ 50.608652] Last potentially related work creation: [ 50.609235] kasan_save_stack+0x22/0x50 [ 50.609820] __kasan_record_aux_stack+0x8e/0xa0 [ 50.610396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.611040] remove_vma+0x139/0x170 [ 50.611490] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.612057] do_vmi_munmap+0x1f1/0x2b0 [ 50.612547] __vm_munmap+0x138/0x3a0 [ 50.613022] __x64_sys_munmap+0x59/0x80 [ 50.613550] do_syscall_64+0x3f/0x90 [ 50.614035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.614691] [ 50.614905] Second to last potentially related work creation: [ 50.615605] kasan_save_stack+0x22/0x50 [ 50.616134] __kasan_record_aux_stack+0x8e/0xa0 [ 50.616722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.617375] remove_vma+0x139/0x170 [ 50.617835] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.618406] do_vmi_munmap+0x1f1/0x2b0 [ 50.618913] mmap_region+0x1f9/0x2660 [ 50.619392] do_mmap+0x854/0xf00 [ 50.619824] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.620348] ksys_mmap_pgoff+0x3af/0x500 [ 50.620850] do_syscall_64+0x3f/0x90 [ 50.621328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.621971] [ 50.622189] The buggy address belongs to the object at ffff88800c48e570 [ 50.622189] which belongs to the cache vm_area_struct of size 168 [ 50.623651] The buggy address is located 88 bytes inside of [ 50.623651] freed 168-byte region [ffff88800c48e570, ffff88800c48e618) [ 50.625069] [ 50.625289] The buggy address belongs to the physical page: [ 50.625944] page:00000000eba2fbc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc48e [ 50.627023] memcg:ffff888019cea501 [ 50.627449] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.628111] page_type: 0xffffffff() [ 50.628562] raw: 0100000000000200 ffff88800879fc80 ffffea0000312140 0000000000000002 [ 50.629480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cea501 [ 50.630393] page dumped because: kasan: bad access detected [ 50.631062] [ 50.631280] Memory state around the buggy address: [ 50.631879] ffff88800c48e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.632742] ffff88800c48e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 50.633603] >ffff88800c48e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.634453] ^ [ 50.635115] ffff88800c48e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 50.635983] ffff88800c48e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.636832] ================================================================== [ 50.637778] Disabling lock debugging due to kernel taint [ 52.829132] BUG: Bad rss-counter state mm:00000000793e5f96 type:MM_FILEPAGES val:33 [ 52.830062] BUG: Bad rss-counter state mm:00000000793e5f96 type:MM_ANONPAGES val:22 [ 53.348582] BUG: Bad rss-counter state mm:0000000004ddfea2 type:MM_FILEPAGES val:33 [ 53.349783] BUG: Bad rss-counter state mm:0000000004ddfea2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47067' (ECDSA) to the list of known hosts. 2023/06/20 01:12:43 fuzzer started 2023/06/20 01:12:44 dialing manager at localhost:44161 2023/06/20 01:12:44 checking machine... 2023/06/20 01:12:44 checking revisions... [ 54.031295] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:12:44 testing simple program... [ 54.072951] cgroup: Unknown subsys name 'net' [ 54.122288] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102ef670 RCX=0000000000000001 RDX=1ffff1100205dee2 RSI=ffffffff83684ee6 RDI=ffff8880102ef67c RBP=ffff8880102ef710 RSP=ffff8880102ef588 R8 =0000000000000001 R9 =ffff8880102ef5e8 R10=0000000000038001 R11=000000000008b61a R12=ffff8880102ef670 R13=0000000000000000 R14=ffff888015908000 R15=0000000000000000 RIP=ffffffff813ad4f9 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 00007f52bd937900 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=00007f52bdeee618 CR3=00000000168d4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055e2719f7a50 RCX=0000000000000000 RDX=0000000000000001 RSI=000055e272a35e00 RDI=000055e272a39a20 RBP=00007fb400006cf0 RSP=00007fb40f8d2850 R8 =00007fb400006ef8 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=00007fb40f8d28d0 R13=000055e272a35e00 R14=000055e2719f7ec0 R15=000055e272a39a20 RIP=000055e2719ad532 RFL=00000246 [---Z-P-] 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 00007fb40f8d3700 00000000 00000000 GS =0000 0000000000000000 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=00007f53ec38ffa0 CR3=000000000e81c000 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=6e6f6373696420646576696563655220 XMM01=31313a32343736332074726f7020322e XMM02=63736964203a31313a32343736332074 XMM03=66207463656e6e6f6373696420646576 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a32313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000