syzkaller login: [ 30.680231] BUG: Bad rss-counter state mm:00000000957ceed9 type:MM_FILEPAGES val:33 [ 30.681458] BUG: Bad rss-counter state mm:00000000957ceed9 type:MM_ANONPAGES val:22 [ 30.841555] ================================================================== [ 30.842494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.843446] Read of size 8 at addr ffff8880099b3a50 by task sshd/221 [ 30.844227] [ 30.844573] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.845435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.846405] Call Trace: [ 30.846741] [ 30.847024] dump_stack_lvl+0x91/0xf0 [ 30.847531] print_report+0xcc/0x620 [ 30.848022] ? __virt_addr_valid+0x102/0x340 [ 30.848611] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849861] kasan_report+0xbe/0xf0 [ 30.850335] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850965] vma_interval_tree_remove+0xc75/0xec0 [ 30.851569] vma_prepare+0xc54/0x11a0 [ 30.852046] __split_vma+0x5af/0x950 [ 30.852526] ? __pfx___split_vma+0x10/0x10 [ 30.853055] ? find_held_lock+0x2c/0x110 [ 30.853576] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.854146] ? lock_is_held_type+0x9f/0x120 [ 30.854684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.855284] ? mtree_range_walk+0x632/0x900 [ 30.855836] ? mas_walk+0x5c7/0x7c0 [ 30.856315] do_vmi_munmap+0x1f1/0x2b0 [ 30.856818] mmap_region+0x1f9/0x2660 [ 30.857303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.857816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.858552] ? __pfx_lock_acquire+0x10/0x10 [ 30.859089] ? __pfx_mmap_region+0x10/0x10 [ 30.859628] ? security_mmap_addr+0x7d/0xa0 [ 30.860164] ? get_unmapped_area+0x1f5/0x3f0 [ 30.860733] do_mmap+0x854/0xf00 [ 30.861176] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.861678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.862246] ksys_mmap_pgoff+0x3af/0x500 [ 30.862762] do_syscall_64+0x3f/0x90 [ 30.863252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863917] RIP: 0033:0x7f828561dd82 [ 30.864373] 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 [ 30.866536] RSP: 002b:00007ffff461a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.867444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f828561dd82 [ 30.868326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8284a57000 [ 30.869221] RBP: 00007f8284a57000 R08: 0000000000000009 R09: 0000000000001000 [ 30.870112] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608e11d9b20 [ 30.871036] R13: 00007ffff461a110 R14: 00007ffff461a140 R15: 00007ffff461a4a0 [ 30.871947] [ 30.872251] [ 30.872470] Allocated by task 214: [ 30.872934] kasan_save_stack+0x22/0x50 [ 30.873436] kasan_set_track+0x25/0x30 [ 30.873928] __kasan_slab_alloc+0x59/0x70 [ 30.874465] kmem_cache_alloc+0x16b/0x370 [ 30.874987] vm_area_dup+0x20/0x160 [ 30.875446] __split_vma+0x170/0x950 [ 30.875920] split_vma+0xc6/0x110 [ 30.876362] mprotect_fixup+0x8d2/0xb30 [ 30.876889] do_mprotect_pkey+0x87e/0xd40 [ 30.877417] __x64_sys_mprotect+0x78/0xc0 [ 30.877936] do_syscall_64+0x3f/0x90 [ 30.878415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879072] [ 30.879291] Freed by task 214: [ 30.879684] kasan_save_stack+0x22/0x50 [ 30.880190] kasan_set_track+0x25/0x30 [ 30.880692] kasan_save_free_info+0x2b/0x50 [ 30.881228] __kasan_slab_free+0x10a/0x190 [ 30.881766] kmem_cache_free+0x10d/0x4d0 [ 30.882280] rcu_core+0x8c8/0x2860 [ 30.882724] __do_softirq+0x1b7/0x7d4 [ 30.883214] [ 30.883435] Last potentially related work creation: [ 30.884030] kasan_save_stack+0x22/0x50 [ 30.884548] __kasan_record_aux_stack+0x8e/0xa0 [ 30.885138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.885793] remove_vma+0x139/0x170 [ 30.886249] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.886815] do_vmi_munmap+0x1f1/0x2b0 [ 30.887307] __vm_munmap+0x138/0x3a0 [ 30.887777] __x64_sys_munmap+0x59/0x80 [ 30.888280] do_syscall_64+0x3f/0x90 [ 30.888782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889425] [ 30.889640] The buggy address belongs to the object at ffff8880099b39f8 [ 30.889640] which belongs to the cache vm_area_struct of size 168 [ 30.891197] The buggy address is located 88 bytes inside of [ 30.891197] freed 168-byte region [ffff8880099b39f8, ffff8880099b3aa0) [ 30.892714] [ 30.892942] The buggy address belongs to the physical page: [ 30.893625] page:00000000bc2961b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b3 [ 30.894763] memcg:ffff88800ed68201 [ 30.895214] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.895896] page_type: 0xffffffff() [ 30.896371] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.897371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed68201 [ 30.898331] page dumped because: kasan: bad access detected [ 30.899020] [ 30.899248] Memory state around the buggy address: [ 30.899857] ffff8880099b3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.900780] ffff8880099b3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.901683] >ffff8880099b3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902593] ^ [ 30.903334] ffff8880099b3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.904240] ffff8880099b3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905144] ================================================================== [ 30.906163] Disabling lock debugging due to kernel taint [ 32.892406] BUG: Bad rss-counter state mm:00000000091c6a6d type:MM_FILEPAGES val:33 [ 32.893599] BUG: Bad rss-counter state mm:00000000091c6a6d type:MM_ANONPAGES val:22 [ 33.283101] BUG: Bad rss-counter state mm:00000000b49a4695 type:MM_FILEPAGES val:33 [ 33.284333] BUG: Bad rss-counter state mm:00000000b49a4695 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60312' (ECDSA) to the list of known hosts. 2023/06/20 14:51:43 fuzzer started 2023/06/20 14:51:44 dialing manager at localhost:36067 2023/06/20 14:51:44 checking machine... 2023/06/20 14:51:44 checking revisions... [ 33.968021] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:51:44 testing simple program... [ 34.017404] cgroup: Unknown subsys name 'net' [ 34.068498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:51:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000066 RCX=1ffff11001f4980f RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800c2be5c0 RSP=ffff88800f01f728 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6d53 R12=ffff888010116100 R13=0000000000000000 R14=ffff88800c2be360 R15=0000000000000000 RIP=ffffffff814c0404 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa18fdb6900 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=00007fa18f233c60 CR3=000000000c7fa000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f671a4441dc1e17f00000000000ae988 XMM05=2c48bdfa892a06900000000000133248 XMM06=c291bd5c70af25b900000000001322e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800edef408 RCX=0000000000000001 RDX=1ffff11001dbde83 RSI=ffff88800edef538 RDI=ffff88800edef418 RBP=ffff88800edef538 RSP=ffff88800edef360 R8 =ffffffff860d825a R9 =ffff88800edef448 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88800ede8000 R14=ffff88800edef540 R15=ffff88800edef408 RIP=ffffffff81130468 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 00007f4f68ffc700 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=00007ffc7e3b5bc8 CR3=000000001683e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732033343a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000