syzkaller login: [ 31.669132] BUG: Bad rss-counter state mm:000000007ca66ae3 type:MM_FILEPAGES val:33 [ 31.669950] BUG: Bad rss-counter state mm:000000007ca66ae3 type:MM_ANONPAGES val:22 [ 31.861025] ================================================================== [ 31.862417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.863576] Read of size 8 at addr ffff88801adbfc20 by task sshd/220 [ 31.864566] [ 31.864840] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.865900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.867091] Call Trace: [ 31.867484] [ 31.867839] dump_stack_lvl+0x91/0xf0 [ 31.868487] print_report+0xcc/0x620 [ 31.869089] ? __virt_addr_valid+0x102/0x340 [ 31.869780] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.870546] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.871302] kasan_report+0xbe/0xf0 [ 31.871892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.872706] vma_interval_tree_remove+0xc75/0xec0 [ 31.873457] vma_prepare+0xc54/0x11a0 [ 31.874064] __split_vma+0x5af/0x950 [ 31.874641] ? __pfx___split_vma+0x10/0x10 [ 31.875291] ? find_held_lock+0x2c/0x110 [ 31.875939] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.876662] ? lock_is_held_type+0x9f/0x120 [ 31.877317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.878052] ? mtree_range_walk+0x632/0x900 [ 31.878742] ? mas_walk+0x5c7/0x7c0 [ 31.879329] do_vmi_munmap+0x1f1/0x2b0 [ 31.879933] mmap_region+0x1f9/0x2660 [ 31.880567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.881197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.882072] ? __pfx_lock_acquire+0x10/0x10 [ 31.882726] ? __pfx_mmap_region+0x10/0x10 [ 31.883409] ? security_mmap_addr+0x7d/0xa0 [ 31.884068] ? get_unmapped_area+0x1f5/0x3f0 [ 31.884788] do_mmap+0x854/0xf00 [ 31.885334] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.885947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886641] ksys_mmap_pgoff+0x3af/0x500 [ 31.887270] do_syscall_64+0x3f/0x90 [ 31.887863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888684] RIP: 0033:0x7fa3234a3d82 [ 31.889252] 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 [ 31.891858] RSP: 002b:00007ffdf6a576a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.893018] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3234a3d82 [ 31.894055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3228dd000 [ 31.895092] RBP: 00007fa3228dd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.896165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560403b2eec0 [ 31.897195] R13: 00007ffdf6a576c0 R14: 00007ffdf6a576f0 R15: 00007ffdf6a57a50 [ 31.898253] [ 31.898613] [ 31.898875] Allocated by task 213: [ 31.899409] kasan_save_stack+0x22/0x50 [ 31.900031] kasan_set_track+0x25/0x30 [ 31.900684] __kasan_slab_alloc+0x59/0x70 [ 31.901327] kmem_cache_alloc+0x16b/0x370 [ 31.901959] vm_area_dup+0x20/0x160 [ 31.902518] __split_vma+0x170/0x950 [ 31.903093] split_vma+0xc6/0x110 [ 31.903641] mprotect_fixup+0x8d2/0xb30 [ 31.904285] do_mprotect_pkey+0x87e/0xd40 [ 31.904935] __x64_sys_mprotect+0x78/0xc0 [ 31.905573] do_syscall_64+0x3f/0x90 [ 31.906154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.906942] [ 31.907209] Freed by task 213: [ 31.907696] kasan_save_stack+0x22/0x50 [ 31.908332] kasan_set_track+0x25/0x30 [ 31.908938] kasan_save_free_info+0x2b/0x50 [ 31.909593] __kasan_slab_free+0x10a/0x190 [ 31.910248] kmem_cache_free+0x10d/0x4d0 [ 31.910872] rcu_core+0x8c8/0x2860 [ 31.911409] __do_softirq+0x1b7/0x7d4 [ 31.911991] [ 31.912301] Last potentially related work creation: [ 31.913012] kasan_save_stack+0x22/0x50 [ 31.913628] __kasan_record_aux_stack+0x8e/0xa0 [ 31.914332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.915113] remove_vma+0x139/0x170 [ 31.915662] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.916373] do_vmi_munmap+0x1f1/0x2b0 [ 31.916960] __vm_munmap+0x138/0x3a0 [ 31.917528] __x64_sys_munmap+0x59/0x80 [ 31.918135] do_syscall_64+0x3f/0x90 [ 31.918714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.919496] [ 31.919763] The buggy address belongs to the object at ffff88801adbfbc8 [ 31.919763] which belongs to the cache vm_area_struct of size 168 [ 31.921599] The buggy address is located 88 bytes inside of [ 31.921599] freed 168-byte region [ffff88801adbfbc8, ffff88801adbfc70) [ 31.923318] [ 31.923581] The buggy address belongs to the physical page: [ 31.924425] page:00000000d947edc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1adbf [ 31.925754] memcg:ffff88800ef30a01 [ 31.926279] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.927065] page_type: 0xffffffff() [ 31.927615] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.928752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef30a01 [ 31.929851] page dumped because: kasan: bad access detected [ 31.930652] [ 31.930915] Memory state around the buggy address: [ 31.931618] ffff88801adbfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.932696] ffff88801adbfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.933740] >ffff88801adbfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.934770] ^ [ 31.935415] ffff88801adbfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.936471] ffff88801adbfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.937515] ================================================================== [ 31.939035] Disabling lock debugging due to kernel taint [ 33.884095] BUG: Bad rss-counter state mm:000000000c0513dc type:MM_FILEPAGES val:33 [ 33.884835] BUG: Bad rss-counter state mm:000000000c0513dc type:MM_ANONPAGES val:22 [ 34.253508] BUG: Bad rss-counter state mm:00000000aee50c93 type:MM_FILEPAGES val:33 [ 34.254637] BUG: Bad rss-counter state mm:00000000aee50c93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26185' (ECDSA) to the list of known hosts. 2023/06/20 08:43:18 fuzzer started 2023/06/20 08:43:19 dialing manager at localhost:44161 2023/06/20 08:43:19 checking machine... 2023/06/20 08:43:19 checking revisions... [ 34.794109] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:43:19 testing simple program... [ 34.829773] cgroup: Unknown subsys name 'net' [ 34.875479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=ffff88800f94d1c0 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110028d6edb RSP=ffff8880146b76c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88800c5a7ab0 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f7936a11900 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=00007fc848d4b650 CR3=000000000c6b6000 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=a13cde14d5989e3a00000000000ae988 XMM05=d7d72629bb39241c0000000000136778 XMM06=4fda316b135da52b0000000000135568 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001000 RCX=ffffffff81baddfd RDX=ffff888009520000 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800952faf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffffea000074a4c0 R13=ffff88801b9c3000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c01e1 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 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=00005637640d7d68 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f7a1e9ebc71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000