syzkaller login: [ 30.206462] BUG: Bad rss-counter state mm:0000000024b37df2 type:MM_FILEPAGES val:33 [ 30.207459] BUG: Bad rss-counter state mm:0000000024b37df2 type:MM_ANONPAGES val:22 [ 30.376531] ================================================================== [ 30.377635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.378895] Read of size 8 at addr ffff8880146c7c20 by task sshd/219 [ 30.379885] [ 30.380147] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.381199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.382388] Call Trace: [ 30.382834] [ 30.383161] dump_stack_lvl+0x91/0xf0 [ 30.383688] print_report+0xcc/0x620 [ 30.384191] ? __virt_addr_valid+0x102/0x340 [ 30.384751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.386028] kasan_report+0xbe/0xf0 [ 30.386551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.387217] vma_interval_tree_remove+0xc75/0xec0 [ 30.387832] vma_prepare+0xc54/0x11a0 [ 30.388310] __split_vma+0x5af/0x950 [ 30.388790] ? __pfx___split_vma+0x10/0x10 [ 30.389320] ? find_held_lock+0x2c/0x110 [ 30.389842] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.390425] ? lock_is_held_type+0x9f/0x120 [ 30.390989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.391628] ? mtree_range_walk+0x632/0x900 [ 30.392194] ? mas_walk+0x5c7/0x7c0 [ 30.392687] do_vmi_munmap+0x1f1/0x2b0 [ 30.393204] mmap_region+0x1f9/0x2660 [ 30.393694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.394222] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.394983] ? __pfx_lock_acquire+0x10/0x10 [ 30.395538] ? __pfx_mmap_region+0x10/0x10 [ 30.396084] ? security_mmap_addr+0x7d/0xa0 [ 30.396643] ? get_unmapped_area+0x1f5/0x3f0 [ 30.397208] do_mmap+0x854/0xf00 [ 30.397654] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.398169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.398778] ksys_mmap_pgoff+0x3af/0x500 [ 30.399310] do_syscall_64+0x3f/0x90 [ 30.399811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400472] RIP: 0033:0x7f2571519d82 [ 30.400922] 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 [ 30.403172] RSP: 002b:00007fff41f3b4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.404112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2571519d82 [ 30.404995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2570953000 [ 30.405888] RBP: 00007f2570953000 R08: 0000000000000009 R09: 0000000000001000 [ 30.406775] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d469aeec0 [ 30.407663] R13: 00007fff41f3b4d0 R14: 00007fff41f3b500 R15: 00007fff41f3b860 [ 30.408561] [ 30.408858] [ 30.409076] Allocated by task 212: [ 30.409514] kasan_save_stack+0x22/0x50 [ 30.410030] kasan_set_track+0x25/0x30 [ 30.410543] __kasan_slab_alloc+0x59/0x70 [ 30.411108] kmem_cache_alloc+0x16b/0x370 [ 30.411643] vm_area_dup+0x20/0x160 [ 30.412125] __split_vma+0x170/0x950 [ 30.412612] split_vma+0xc6/0x110 [ 30.413068] mprotect_fixup+0x8d2/0xb30 [ 30.413596] do_mprotect_pkey+0x87e/0xd40 [ 30.414151] __x64_sys_mprotect+0x78/0xc0 [ 30.414722] do_syscall_64+0x3f/0x90 [ 30.415208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.415867] [ 30.416078] Freed by task 212: [ 30.416481] kasan_save_stack+0x22/0x50 [ 30.416999] kasan_set_track+0x25/0x30 [ 30.417514] kasan_save_free_info+0x2b/0x50 [ 30.418081] __kasan_slab_free+0x10a/0x190 [ 30.418650] kmem_cache_free+0x10d/0x4d0 [ 30.419187] rcu_core+0x8c8/0x2860 [ 30.419645] __do_softirq+0x1b7/0x7d4 [ 30.420140] [ 30.420415] Last potentially related work creation: [ 30.421021] kasan_save_stack+0x22/0x50 [ 30.421539] __kasan_record_aux_stack+0x8e/0xa0 [ 30.422131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.422803] remove_vma+0x139/0x170 [ 30.423256] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.423818] do_vmi_munmap+0x1f1/0x2b0 [ 30.424299] __vm_munmap+0x138/0x3a0 [ 30.424775] __x64_sys_munmap+0x59/0x80 [ 30.425274] do_syscall_64+0x3f/0x90 [ 30.425752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.426400] [ 30.426620] The buggy address belongs to the object at ffff8880146c7bc8 [ 30.426620] which belongs to the cache vm_area_struct of size 168 [ 30.428103] The buggy address is located 88 bytes inside of [ 30.428103] freed 168-byte region [ffff8880146c7bc8, ffff8880146c7c70) [ 30.429514] [ 30.429733] The buggy address belongs to the physical page: [ 30.430400] page:000000006762c29a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146c7 [ 30.431496] memcg:ffff88800e089301 [ 30.431930] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.432579] page_type: 0xffffffff() [ 30.433031] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.433952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e089301 [ 30.434882] page dumped because: kasan: bad access detected [ 30.435548] [ 30.435764] Memory state around the buggy address: [ 30.436360] ffff8880146c7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.437224] ffff8880146c7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.438087] >ffff8880146c7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.438959] ^ [ 30.439491] ffff8880146c7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.440352] ffff8880146c7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.441209] ================================================================== [ 30.442225] Disabling lock debugging due to kernel taint [ 32.294217] BUG: Bad rss-counter state mm:000000006e97c2fc type:MM_FILEPAGES val:33 [ 32.295128] BUG: Bad rss-counter state mm:000000006e97c2fc type:MM_ANONPAGES val:22 [ 32.775041] BUG: Bad rss-counter state mm:000000003750c675 type:MM_FILEPAGES val:33 [ 32.776093] BUG: Bad rss-counter state mm:000000003750c675 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12507' (ECDSA) to the list of known hosts. 2023/06/21 01:43:15 fuzzer started 2023/06/21 01:43:15 dialing manager at localhost:36067 2023/06/21 01:43:15 checking machine... 2023/06/21 01:43:15 checking revisions... [ 33.469474] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:43:15 testing simple program... [ 33.517087] cgroup: Unknown subsys name 'net' [ 33.571704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:43:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146dfa88 RCX=ffffffff86138e01 RDX=1ffff110028dbf53 RSI=ffffffff8180effe RDI=ffff8880146dfa98 RBP=ffff8880146dfa58 RSP=ffff8880146df9a0 R8 =ffffffff86138e90 R9 =ffff8880146dfa00 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880146dfa88 R13=0000000000000000 R14=ffff8880146e0000 R15=ffff88800fffa500 RIP=ffffffff813ad496 RFL=00000286 [--S--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 00007f0346bc2900 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=00007f0346052560 CR3=000000000c47c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9d305bbebf9cd14c00000000000ae988 XMM05=4dd185399c8531550000000000133990 XMM06=806171799158d9670000000000132780 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801a8675a8 RCX=0000000000000001 RDX=1ffff1100350ceb6 RSI=ffff88801a867910 RDI=ffff88801a8675b0 RBP=ffff88801a867910 RSP=ffff88801a867500 R8 =ffffffff86139748 R9 =ffff88801a8675e8 R10=0000000000038001 R11=0000000000020f03 R12=0000000000000008 R13=ffff88801a8675f0 R14=ffff88801a867918 R15=ffff88801a8675a8 RIP=ffffffff81130445 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 00007f04e27cd900 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=00007fff51d74000 CR3=000000001a812000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000