syzkaller login: [ 30.556398] BUG: Bad rss-counter state mm:00000000bebfc14f type:MM_FILEPAGES val:33 [ 30.558695] BUG: Bad rss-counter state mm:00000000bebfc14f type:MM_ANONPAGES val:22 [ 30.718478] ================================================================== [ 30.719397] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.720345] Read of size 8 at addr ffff8880162595c8 by task sshd/219 [ 30.721134] [ 30.721364] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.722340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.723334] Call Trace: [ 30.723651] [ 30.723978] dump_stack_lvl+0x91/0xf0 [ 30.724475] print_report+0xcc/0x620 [ 30.724995] ? __virt_addr_valid+0x102/0x340 [ 30.725552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726173] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726792] kasan_report+0xbe/0xf0 [ 30.727284] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727912] vma_interval_tree_remove+0xc75/0xec0 [ 30.728521] vma_prepare+0xc54/0x11a0 [ 30.729020] __split_vma+0x5af/0x950 [ 30.729490] ? __pfx___split_vma+0x10/0x10 [ 30.730018] ? find_held_lock+0x2c/0x110 [ 30.730541] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.731115] ? lock_is_held_type+0x9f/0x120 [ 30.731657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.732268] ? mtree_range_walk+0x632/0x900 [ 30.732848] ? mas_walk+0x5c7/0x7c0 [ 30.733327] do_vmi_munmap+0x1f1/0x2b0 [ 30.733825] mmap_region+0x1f9/0x2660 [ 30.734312] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.734829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.735559] ? __pfx_lock_acquire+0x10/0x10 [ 30.736098] ? __pfx_mmap_region+0x10/0x10 [ 30.736641] ? security_mmap_addr+0x7d/0xa0 [ 30.737172] ? get_unmapped_area+0x1f5/0x3f0 [ 30.737741] do_mmap+0x854/0xf00 [ 30.738182] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.738700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.739272] ksys_mmap_pgoff+0x3af/0x500 [ 30.739783] do_syscall_64+0x3f/0x90 [ 30.740280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740948] RIP: 0033:0x7fdd9b766d82 [ 30.741417] 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 [ 30.743553] RSP: 002b:00007ffee5b60ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.744474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd9b766d82 [ 30.745352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd9aba0000 [ 30.746211] RBP: 00007fdd9aba0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.747063] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628add31f60 [ 30.747917] R13: 00007ffee5b60f00 R14: 00007ffee5b60f30 R15: 00007ffee5b61290 [ 30.748809] [ 30.749121] [ 30.749340] Allocated by task 212: [ 30.749773] kasan_save_stack+0x22/0x50 [ 30.750297] kasan_set_track+0x25/0x30 [ 30.750810] __kasan_slab_alloc+0x59/0x70 [ 30.751349] kmem_cache_alloc+0x16b/0x370 [ 30.751865] vm_area_dup+0x20/0x160 [ 30.752332] __split_vma+0x170/0x950 [ 30.752806] split_vma+0xc6/0x110 [ 30.753246] mprotect_fixup+0x8d2/0xb30 [ 30.753755] do_mprotect_pkey+0x87e/0xd40 [ 30.754294] __x64_sys_mprotect+0x78/0xc0 [ 30.754825] do_syscall_64+0x3f/0x90 [ 30.755312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755966] [ 30.756184] Freed by task 212: [ 30.756592] kasan_save_stack+0x22/0x50 [ 30.757105] kasan_set_track+0x25/0x30 [ 30.757599] kasan_save_free_info+0x2b/0x50 [ 30.758142] __kasan_slab_free+0x10a/0x190 [ 30.758691] kmem_cache_free+0x10d/0x4d0 [ 30.759206] rcu_core+0x8c8/0x2860 [ 30.759653] __do_softirq+0x1b7/0x7d4 [ 30.760138] [ 30.760353] Last potentially related work creation: [ 30.760948] kasan_save_stack+0x22/0x50 [ 30.761467] __kasan_record_aux_stack+0x8e/0xa0 [ 30.762053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.762710] remove_vma+0x139/0x170 [ 30.763168] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.763737] do_vmi_munmap+0x1f1/0x2b0 [ 30.764223] __vm_munmap+0x138/0x3a0 [ 30.764720] __x64_sys_munmap+0x59/0x80 [ 30.765218] do_syscall_64+0x3f/0x90 [ 30.765697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766358] [ 30.766578] The buggy address belongs to the object at ffff888016259570 [ 30.766578] which belongs to the cache vm_area_struct of size 168 [ 30.768066] The buggy address is located 88 bytes inside of [ 30.768066] freed 168-byte region [ffff888016259570, ffff888016259618) [ 30.769516] [ 30.769737] The buggy address belongs to the physical page: [ 30.770420] page:0000000028198392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16259 [ 30.771534] memcg:ffff88800cb38901 [ 30.771983] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772646] page_type: 0xffffffff() [ 30.773114] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.774063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb38901 [ 30.774993] page dumped because: kasan: bad access detected [ 30.775670] [ 30.775894] Memory state around the buggy address: [ 30.776495] ffff888016259480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.777374] ffff888016259500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.778258] >ffff888016259580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.779134] ^ [ 30.779804] ffff888016259600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.780686] ffff888016259680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.781559] ================================================================== [ 30.782550] Disabling lock debugging due to kernel taint [ 33.275650] BUG: Bad rss-counter state mm:000000000e772f32 type:MM_FILEPAGES val:33 [ 33.276966] BUG: Bad rss-counter state mm:000000000e772f32 type:MM_ANONPAGES val:22 [ 33.730912] BUG: Bad rss-counter state mm:00000000030af00f type:MM_FILEPAGES val:33 [ 33.731595] BUG: Bad rss-counter state mm:00000000030af00f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28564' (ECDSA) to the list of known hosts. 2023/06/21 07:30:28 fuzzer started 2023/06/21 07:30:28 dialing manager at localhost:36067 2023/06/21 07:30:28 checking machine... 2023/06/21 07:30:28 checking revisions... [ 34.362314] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:30:29 testing simple program... [ 34.419738] cgroup: Unknown subsys name 'net' [ 34.458578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00005597b2ffc000 CR3=00000000162ea000 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=2038323a30333a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffe6d2906b0 RBX=0000000000000003 RCX=00007ffe6d290420 RDX=0000000000000010 RSI=00007ffe6d290410 RDI=00007ffe6d2906b0 RBP=0000000000000003 RSP=00007ffe6d2902b8 R8 =0000000000000000 R9 =0000000000000010 R10=0000000000000002 R11=0000000000656434 R12=0000000000000180 R13=00007ffe6d2906b0 R14=00007ffe6d2905c0 R15=0000000000000000 RIP=00007f03a77e3b3f 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 00007f03a6eb6900 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=00007f03a62bc990 CR3=000000000c520000 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=8cdec34d38af4c0a00000000000f7d10 XMM01=8cdec34d38af4c0a00000000000f7d10 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2884b19f1b6c75f500000000000ae988 XMM05=46ac5b035319f6fe00000000001320a0 XMM06=806171799158d9670000000000130e90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000