syzkaller login: [ 109.429202] BUG: Bad rss-counter state mm:00000000635ece27 type:MM_FILEPAGES val:33 [ 109.430214] BUG: Bad rss-counter state mm:00000000635ece27 type:MM_ANONPAGES val:22 [ 109.596452] ================================================================== [ 109.597388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 109.598344] Read of size 8 at addr ffff88800dcab228 by task sshd/221 [ 109.599189] [ 109.599439] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 109.600482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 109.601492] Call Trace: [ 109.601811] [ 109.602101] dump_stack_lvl+0x91/0xf0 [ 109.602599] print_report+0xcc/0x620 [ 109.603090] ? __virt_addr_valid+0x102/0x340 [ 109.603671] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.604285] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.604890] kasan_report+0xbe/0xf0 [ 109.605362] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.605984] vma_interval_tree_remove+0xc75/0xec0 [ 109.606584] vma_prepare+0xc54/0x11a0 [ 109.607062] __split_vma+0x5af/0x950 [ 109.607542] ? __pfx___split_vma+0x10/0x10 [ 109.608067] ? find_held_lock+0x2c/0x110 [ 109.608580] do_vmi_align_munmap+0x2ba/0x11f0 [ 109.609141] ? lock_is_held_type+0x9f/0x120 [ 109.609673] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 109.610277] ? mtree_range_walk+0x632/0x900 [ 109.610820] ? mas_walk+0x5c7/0x7c0 [ 109.611328] do_vmi_munmap+0x1f1/0x2b0 [ 109.611826] mmap_region+0x1f9/0x2660 [ 109.612307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 109.612815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 109.613529] ? __pfx_lock_acquire+0x10/0x10 [ 109.614064] ? __pfx_mmap_region+0x10/0x10 [ 109.614587] ? security_mmap_addr+0x7d/0xa0 [ 109.615113] ? get_unmapped_area+0x1f5/0x3f0 [ 109.615675] do_mmap+0x854/0xf00 [ 109.616113] vm_mmap_pgoff+0x1a6/0x3a0 [ 109.616603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 109.617162] ksys_mmap_pgoff+0x3af/0x500 [ 109.617667] do_syscall_64+0x3f/0x90 [ 109.618145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.618793] RIP: 0033:0x7f18ac686d82 [ 109.619251] 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 [ 109.621401] RSP: 002b:00007ffcf1aa6998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 109.622300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18ac686d82 [ 109.623147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18abac0000 [ 109.624020] RBP: 00007f18abac0000 R08: 0000000000000009 R09: 0000000000001000 [ 109.624859] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d4db22ec0 [ 109.625694] R13: 00007ffcf1aa69b0 R14: 00007ffcf1aa69e0 R15: 00007ffcf1aa6d40 [ 109.626538] [ 109.626830] [ 109.627047] Allocated by task 214: [ 109.627499] kasan_save_stack+0x22/0x50 [ 109.628002] kasan_set_track+0x25/0x30 [ 109.628494] __kasan_slab_alloc+0x59/0x70 [ 109.629014] kmem_cache_alloc+0x16b/0x370 [ 109.629529] vm_area_dup+0x20/0x160 [ 109.629981] __split_vma+0x170/0x950 [ 109.630441] split_vma+0xc6/0x110 [ 109.630878] mprotect_fixup+0x8d2/0xb30 [ 109.631539] do_mprotect_pkey+0x87e/0xd40 [ 109.632205] __x64_sys_mprotect+0x78/0xc0 [ 109.632841] do_syscall_64+0x3f/0x90 [ 109.633421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.634205] [ 109.634467] Freed by task 214: [ 109.634949] kasan_save_stack+0x22/0x50 [ 109.635603] kasan_set_track+0x25/0x30 [ 109.636205] kasan_save_free_info+0x2b/0x50 [ 109.636855] __kasan_slab_free+0x10a/0x190 [ 109.637508] kmem_cache_free+0x10d/0x4d0 [ 109.638131] rcu_core+0x8c8/0x2860 [ 109.638673] __do_softirq+0x1b7/0x7d4 [ 109.639261] [ 109.639542] Last potentially related work creation: [ 109.640267] kasan_save_stack+0x22/0x50 [ 109.640885] __kasan_record_aux_stack+0x8e/0xa0 [ 109.641575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 109.642370] remove_vma+0x139/0x170 [ 109.642935] do_vmi_align_munmap+0xd4a/0x11f0 [ 109.643644] do_vmi_munmap+0x1f1/0x2b0 [ 109.644241] __vm_munmap+0x138/0x3a0 [ 109.644811] __x64_sys_munmap+0x59/0x80 [ 109.645428] do_syscall_64+0x3f/0x90 [ 109.646003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.646786] [ 109.647050] The buggy address belongs to the object at ffff88800dcab1d0 [ 109.647050] which belongs to the cache vm_area_struct of size 168 [ 109.648714] The buggy address is located 88 bytes inside of [ 109.648714] freed 168-byte region [ffff88800dcab1d0, ffff88800dcab278) [ 109.650097] [ 109.650313] The buggy address belongs to the physical page: [ 109.650965] page:000000008b35e94f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcab [ 109.652069] memcg:ffff888017db1901 [ 109.652502] flags: 0x100000000000200(slab|node=0|zone=1) [ 109.653151] page_type: 0xffffffff() [ 109.653596] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 109.654503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017db1901 [ 109.655415] page dumped because: kasan: bad access detected [ 109.656067] [ 109.656282] Memory state around the buggy address: [ 109.656862] ffff88800dcab100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 109.657709] ffff88800dcab180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 109.658561] >ffff88800dcab200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 109.659419] ^ [ 109.659968] ffff88800dcab280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 109.660823] ffff88800dcab300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 109.661662] ================================================================== [ 109.662920] Disabling lock debugging due to kernel taint [ 111.561275] BUG: Bad rss-counter state mm:0000000005764293 type:MM_FILEPAGES val:33 [ 111.562259] BUG: Bad rss-counter state mm:0000000005764293 type:MM_ANONPAGES val:22 [ 112.099705] BUG: Bad rss-counter state mm:00000000bdfd16cf type:MM_FILEPAGES val:33 [ 112.100867] BUG: Bad rss-counter state mm:00000000bdfd16cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35724' (ECDSA) to the list of known hosts. 2023/06/20 08:44:24 fuzzer started 2023/06/20 08:44:24 dialing manager at localhost:44161 2023/06/20 08:44:24 checking machine... 2023/06/20 08:44:24 checking revisions... [ 112.732992] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:44:24 testing simple program... [ 112.785509] cgroup: Unknown subsys name 'net' [ 112.826800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613753e RDX=1ffff1100d9c135c RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09df8 R15=ffff88806ce09a98 RIP=ffffffff81131c60 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 00007f142fd5c900 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=00007f1430311650 CR3=000000001a1ce000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fffc3e19558 CR3=000000000caba000 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=2034323a34343a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a34343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000