syzkaller login: [ 32.749728] BUG: Bad rss-counter state mm:000000004e72bc23 type:MM_FILEPAGES val:33 [ 32.750733] BUG: Bad rss-counter state mm:000000004e72bc23 type:MM_ANONPAGES val:22 [ 32.909251] ================================================================== [ 32.910156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.911117] Read of size 8 at addr ffff8880180b15c8 by task sshd/220 [ 32.911896] [ 32.912115] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.913155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.914142] Call Trace: [ 32.914471] [ 32.914758] dump_stack_lvl+0x91/0xf0 [ 32.915280] print_report+0xcc/0x620 [ 32.915770] ? __virt_addr_valid+0x102/0x340 [ 32.916328] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.916954] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.917580] kasan_report+0xbe/0xf0 [ 32.918065] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.918720] vma_interval_tree_remove+0xc75/0xec0 [ 32.919373] vma_prepare+0xc54/0x11a0 [ 32.919861] __split_vma+0x5af/0x950 [ 32.920341] ? __pfx___split_vma+0x10/0x10 [ 32.920889] ? find_held_lock+0x2c/0x110 [ 32.921422] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.922002] ? lock_is_held_type+0x9f/0x120 [ 32.922559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.923196] ? mtree_range_walk+0x632/0x900 [ 32.923768] ? mas_walk+0x5c7/0x7c0 [ 32.924257] do_vmi_munmap+0x1f1/0x2b0 [ 32.924755] mmap_region+0x1f9/0x2660 [ 32.925255] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.925789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.926529] ? __pfx_lock_acquire+0x10/0x10 [ 32.927084] ? __pfx_mmap_region+0x10/0x10 [ 32.927635] ? security_mmap_addr+0x7d/0xa0 [ 32.928175] ? get_unmapped_area+0x1f5/0x3f0 [ 32.928751] do_mmap+0x854/0xf00 [ 32.929203] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.929714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.930292] ksys_mmap_pgoff+0x3af/0x500 [ 32.930811] do_syscall_64+0x3f/0x90 [ 32.931322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.931974] RIP: 0033:0x7fa4a50afd82 [ 32.932447] 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 [ 32.934655] RSP: 002b:00007ffef4cab708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.935603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4a50afd82 [ 32.936474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4a44e9000 [ 32.937334] RBP: 00007fa4a44e9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.938203] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddcd35ff70 [ 32.939092] R13: 00007ffef4cab720 R14: 00007ffef4cab750 R15: 00007ffef4cabab0 [ 32.939966] [ 32.940258] [ 32.940484] Allocated by task 213: [ 32.940923] kasan_save_stack+0x22/0x50 [ 32.941440] kasan_set_track+0x25/0x30 [ 32.941936] __kasan_slab_alloc+0x59/0x70 [ 32.942472] kmem_cache_alloc+0x16b/0x370 [ 32.943026] vm_area_dup+0x20/0x160 [ 32.943502] __split_vma+0x170/0x950 [ 32.943987] split_vma+0xc6/0x110 [ 32.944442] mprotect_fixup+0x8d2/0xb30 [ 32.944964] do_mprotect_pkey+0x87e/0xd40 [ 32.945494] __x64_sys_mprotect+0x78/0xc0 [ 32.946037] do_syscall_64+0x3f/0x90 [ 32.946532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.947204] [ 32.947430] Freed by task 213: [ 32.947830] kasan_save_stack+0x22/0x50 [ 32.948358] kasan_set_track+0x25/0x30 [ 32.948862] kasan_save_free_info+0x2b/0x50 [ 32.949403] __kasan_slab_free+0x10a/0x190 [ 32.949954] kmem_cache_free+0x10d/0x4d0 [ 32.950471] rcu_core+0x8c8/0x2860 [ 32.950933] __do_softirq+0x1b7/0x7d4 [ 32.951418] [ 32.951646] Last potentially related work creation: [ 32.952249] kasan_save_stack+0x22/0x50 [ 32.952770] __kasan_record_aux_stack+0x8e/0xa0 [ 32.953357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.954088] remove_vma+0x139/0x170 [ 32.954546] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.955124] do_vmi_munmap+0x1f1/0x2b0 [ 32.955614] __vm_munmap+0x138/0x3a0 [ 32.956090] __x64_sys_munmap+0x59/0x80 [ 32.956598] do_syscall_64+0x3f/0x90 [ 32.957083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.957738] [ 32.957953] The buggy address belongs to the object at ffff8880180b1570 [ 32.957953] which belongs to the cache vm_area_struct of size 168 [ 32.959466] The buggy address is located 88 bytes inside of [ 32.959466] freed 168-byte region [ffff8880180b1570, ffff8880180b1618) [ 32.960892] [ 32.961119] The buggy address belongs to the physical page: [ 32.961789] page:000000009dd1adaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180b1 [ 32.962937] memcg:ffff88800f1bb201 [ 32.963378] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.964036] page_type: 0xffffffff() [ 32.964501] raw: 0100000000000200 ffff88800879fc80 ffffea00003c3500 dead000000000004 [ 32.965453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1bb201 [ 32.966368] page dumped because: kasan: bad access detected [ 32.967052] [ 32.967271] Memory state around the buggy address: [ 32.967859] ffff8880180b1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.968729] ffff8880180b1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.969604] >ffff8880180b1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.970477] ^ [ 32.971160] ffff8880180b1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.972026] ffff8880180b1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.972888] ================================================================== [ 32.973916] Disabling lock debugging due to kernel taint [ 35.088884] BUG: Bad rss-counter state mm:00000000abdd6cd9 type:MM_FILEPAGES val:33 [ 35.090074] BUG: Bad rss-counter state mm:00000000abdd6cd9 type:MM_ANONPAGES val:22 [ 35.555606] BUG: Bad rss-counter state mm:0000000074bd5f57 type:MM_FILEPAGES val:33 [ 35.556804] BUG: Bad rss-counter state mm:0000000074bd5f57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15854' (ECDSA) to the list of known hosts. 2023/06/19 20:49:22 fuzzer started 2023/06/19 20:49:22 dialing manager at localhost:44161 2023/06/19 20:49:22 checking machine... 2023/06/19 20:49:22 checking revisions... [ 36.208940] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:49:22 testing simple program... [ 36.261006] cgroup: Unknown subsys name 'net' [ 36.335278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:20 Registers: info registers vcpu 0 RAX=ffff88801bc4fe60 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801bc4fa01 RSI=ffff88801bc4faf0 RDI=ffff88801bc4faf0 RBP=ffff88801bc4f578 RSP=ffff88801bc4f4b0 R8 =0000000000000001 R9 =ffff88801bc4f560 R10=0000000000038001 R11=0000000000091aff R12=ffff88801bc4f580 R13=ffff88801bc4f568 R14=ffff88801bc4faf0 R15=ffff88801bc4f520 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fbe31ee4900 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=00007fbe3249b618 CR3=0000000017168000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd6cce91800 CR3=000000000d7c6000 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=7da589312fc332a3fc44dce9fd62fd4d XMM02=0000000000121988eff9b2d0a8fce9cb XMM03=0000000000121a582c67c8bc2e329bc3 XMM04=bfa43cc7c717e9c300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134620 XMM06=33997ffc875785220000000000133488 XMM07=e042d86d42eb936e0000000000124d08 XMM08=0d9c5242e92a4d0e0000000000121a58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000