syzkaller login: [ 31.331974] BUG: Bad rss-counter state mm:000000002ea08bbb type:MM_FILEPAGES val:33 [ 31.333184] BUG: Bad rss-counter state mm:000000002ea08bbb type:MM_ANONPAGES val:22 [ 31.369611] ================================================================== [ 31.370569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.371548] Read of size 8 at addr ffff88800fbea140 by task sshd/220 [ 31.372351] [ 31.372569] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.373459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.374469] Call Trace: [ 31.374803] [ 31.375095] dump_stack_lvl+0x91/0xf0 [ 31.375620] print_report+0xcc/0x620 [ 31.376120] ? __virt_addr_valid+0x102/0x340 [ 31.376718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377364] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377982] kasan_report+0xbe/0xf0 [ 31.378484] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379110] vma_interval_tree_remove+0xc75/0xec0 [ 31.379770] vma_prepare+0xc54/0x11a0 [ 31.380286] __split_vma+0x5af/0x950 [ 31.380765] ? __pfx___split_vma+0x10/0x10 [ 31.381319] ? find_held_lock+0x2c/0x110 [ 31.381852] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.382439] ? lock_is_held_type+0x9f/0x120 [ 31.382983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.383664] ? mtree_range_walk+0x632/0x900 [ 31.384253] ? mas_walk+0x5c7/0x7c0 [ 31.384742] do_vmi_munmap+0x1f1/0x2b0 [ 31.385260] mmap_region+0x1f9/0x2660 [ 31.385756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.386289] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.387014] ? __pfx_lock_acquire+0x10/0x10 [ 31.387593] ? __pfx_mmap_region+0x10/0x10 [ 31.388132] ? security_mmap_addr+0x7d/0xa0 [ 31.388704] ? get_unmapped_area+0x1f5/0x3f0 [ 31.389277] do_mmap+0x854/0xf00 [ 31.389724] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.390249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.390822] ksys_mmap_pgoff+0x3af/0x500 [ 31.391438] do_syscall_64+0x3f/0x90 [ 31.392090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392971] RIP: 0033:0x7fdea757fd82 [ 31.393586] 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 [ 31.396348] RSP: 002b:00007fff5882a868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.397429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdea757fd82 [ 31.398305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdea69b9000 [ 31.399185] RBP: 00007fdea69b9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.400065] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e012d1ec0 [ 31.400938] R13: 00007fff5882a880 R14: 00007fff5882a8b0 R15: 00007fff5882ac10 [ 31.401811] [ 31.402106] [ 31.402336] Allocated by task 213: [ 31.402763] kasan_save_stack+0x22/0x50 [ 31.403299] kasan_set_track+0x25/0x30 [ 31.403795] __kasan_slab_alloc+0x59/0x70 [ 31.404357] kmem_cache_alloc+0x16b/0x370 [ 31.404880] vm_area_dup+0x20/0x160 [ 31.405352] __split_vma+0x170/0x950 [ 31.405822] split_vma+0xc6/0x110 [ 31.406287] mprotect_fixup+0x8d2/0xb30 [ 31.406795] do_mprotect_pkey+0x87e/0xd40 [ 31.407345] __x64_sys_mprotect+0x78/0xc0 [ 31.407874] do_syscall_64+0x3f/0x90 [ 31.408396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.409055] [ 31.409295] Freed by task 13: [ 31.409677] kasan_save_stack+0x22/0x50 [ 31.410200] kasan_set_track+0x25/0x30 [ 31.410700] kasan_save_free_info+0x2b/0x50 [ 31.411254] __kasan_slab_free+0x10a/0x190 [ 31.411818] kmem_cache_free+0x10d/0x4d0 [ 31.412356] rcu_core+0x8c8/0x2860 [ 31.412806] __do_softirq+0x1b7/0x7d4 [ 31.413316] [ 31.413536] Last potentially related work creation: [ 31.414123] kasan_save_stack+0x22/0x50 [ 31.414649] __kasan_record_aux_stack+0x8e/0xa0 [ 31.415240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.415909] remove_vma+0x139/0x170 [ 31.416407] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.416972] do_vmi_munmap+0x1f1/0x2b0 [ 31.417475] __vm_munmap+0x138/0x3a0 [ 31.417943] __x64_sys_munmap+0x59/0x80 [ 31.418462] do_syscall_64+0x3f/0x90 [ 31.418940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419624] [ 31.419843] The buggy address belongs to the object at ffff88800fbea0e8 [ 31.419843] which belongs to the cache vm_area_struct of size 168 [ 31.421368] The buggy address is located 88 bytes inside of [ 31.421368] freed 168-byte region [ffff88800fbea0e8, ffff88800fbea190) [ 31.422795] [ 31.423013] The buggy address belongs to the physical page: [ 31.423716] page:000000004ede45a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbea [ 31.424854] memcg:ffff88800b97d701 [ 31.425316] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.425966] page_type: 0xffffffff() [ 31.426529] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.427625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b97d701 [ 31.428554] page dumped because: kasan: bad access detected [ 31.429271] [ 31.429494] Memory state around the buggy address: [ 31.430084] ffff88800fbea000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.430962] ffff88800fbea080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.431865] >ffff88800fbea100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.432748] ^ [ 31.433424] ffff88800fbea180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.434300] ffff88800fbea200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.435166] ================================================================== [ 31.436117] Disabling lock debugging due to kernel taint [ 33.315772] BUG: Bad rss-counter state mm:00000000e9d42c0b type:MM_FILEPAGES val:33 [ 33.316688] BUG: Bad rss-counter state mm:00000000e9d42c0b type:MM_ANONPAGES val:22 [ 33.826588] BUG: Bad rss-counter state mm:0000000033878dc5 type:MM_FILEPAGES val:33 [ 33.827839] BUG: Bad rss-counter state mm:0000000033878dc5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38827' (ECDSA) to the list of known hosts. 2023/06/21 00:39:55 fuzzer started 2023/06/21 00:39:55 dialing manager at localhost:36067 2023/06/21 00:39:55 checking machine... 2023/06/21 00:39:55 checking revisions... [ 34.606648] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:39:55 testing simple program... [ 34.653092] cgroup: Unknown subsys name 'net' [ 34.709446] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:54 Registers: info registers vcpu 0 RAX=0000563082409e90 RBX=0000000000046180 RCX=000056308240be90 RDX=0000000000002011 RSI=0000000000002000 RDI=0000563082409e90 RBP=0000000000002010 RSP=00007ffdf979e340 R8 =0000000000000003 R9 =00007f9b3e940be0 R10=0000000000000070 R11=0000000000000000 R12=00007f9b3e940b80 R13=0000000000000201 R14=fffffffffffffe28 R15=0000563082409e90 RIP=00007f9b3e80a65d RFL=00000202 [-------] 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 00007f9b3e38e900 00000000 00000000 GS =0000 0000000000000000 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=00007f9b3e943650 CR3=000000000d6a8000 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=66206465736f6c63206e6f6973736573 XMM01=746f6f72207265737520726f66206465 XMM02=0000000000000000000000ffffffffff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=6f69737365735f6e65706f0000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800dc14390 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800dc14394 RBP=1ffff1100287af93 RSP=ffff8880143d7c90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000202 R13=ffff88800dc143d0 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff812e0055 RFL=00000016 [----AP-] 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 00007f63c10c5900 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=00007f63c052ff50 CR3=000000000e22c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=93072bc05963b5f600000000000ae988 XMM05=ce397d4f7d5964130000000000132aa0 XMM06=4fda316b135da52b0000000000131890 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000