syzkaller login: [ 28.685454] BUG: Bad rss-counter state mm:00000000b2854270 type:MM_FILEPAGES val:33 [ 28.686599] BUG: Bad rss-counter state mm:00000000b2854270 type:MM_ANONPAGES val:22 [ 28.846874] ================================================================== [ 28.848002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.849106] Read of size 8 at addr ffff88800de1a4e0 by task sshd/219 [ 28.850156] [ 28.850373] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.851263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.852264] Call Trace: [ 28.852582] [ 28.852867] dump_stack_lvl+0x91/0xf0 [ 28.853367] print_report+0xcc/0x620 [ 28.853852] ? __virt_addr_valid+0x102/0x340 [ 28.854408] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.855025] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.855652] kasan_report+0xbe/0xf0 [ 28.856131] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.856753] vma_interval_tree_remove+0xc75/0xec0 [ 28.857352] vma_prepare+0xc54/0x11a0 [ 28.857830] __split_vma+0x5af/0x950 [ 28.858303] ? __pfx___split_vma+0x10/0x10 [ 28.858829] ? find_held_lock+0x2c/0x110 [ 28.859377] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.859941] ? lock_is_held_type+0x9f/0x120 [ 28.860483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.861088] ? mtree_range_walk+0x632/0x900 [ 28.861639] ? mas_walk+0x5c7/0x7c0 [ 28.862116] do_vmi_munmap+0x1f1/0x2b0 [ 28.862612] mmap_region+0x1f9/0x2660 [ 28.863095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.863621] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.864339] ? __pfx_lock_acquire+0x10/0x10 [ 28.864867] ? __pfx_mmap_region+0x10/0x10 [ 28.865406] ? security_mmap_addr+0x7d/0xa0 [ 28.865944] ? get_unmapped_area+0x1f5/0x3f0 [ 28.866494] do_mmap+0x854/0xf00 [ 28.866930] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.867439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.868001] ksys_mmap_pgoff+0x3af/0x500 [ 28.868509] do_syscall_64+0x3f/0x90 [ 28.868992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.869641] RIP: 0033:0x7f6f703dbd82 [ 28.870097] 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 [ 28.872224] RSP: 002b:00007fff40d94528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.873117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f703dbd82 [ 28.873953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f6f815000 [ 28.874799] RBP: 00007f6f6f815000 R08: 0000000000000009 R09: 0000000000001000 [ 28.875649] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2f520fec0 [ 28.876499] R13: 00007fff40d94540 R14: 00007fff40d94570 R15: 00007fff40d948d0 [ 28.877351] [ 28.877645] [ 28.877861] Allocated by task 212: [ 28.878291] kasan_save_stack+0x22/0x50 [ 28.878790] kasan_set_track+0x25/0x30 [ 28.879300] __kasan_slab_alloc+0x59/0x70 [ 28.879832] kmem_cache_alloc+0x16b/0x370 [ 28.880359] vm_area_dup+0x20/0x160 [ 28.880830] __split_vma+0x170/0x950 [ 28.881304] split_vma+0xc6/0x110 [ 28.881741] mprotect_fixup+0x8d2/0xb30 [ 28.882246] do_mprotect_pkey+0x87e/0xd40 [ 28.882769] __x64_sys_mprotect+0x78/0xc0 [ 28.883303] do_syscall_64+0x3f/0x90 [ 28.883783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884428] [ 28.884646] Freed by task 212: [ 28.885041] kasan_save_stack+0x22/0x50 [ 28.885552] kasan_set_track+0x25/0x30 [ 28.886051] kasan_save_free_info+0x2b/0x50 [ 28.886588] __kasan_slab_free+0x10a/0x190 [ 28.887119] kmem_cache_free+0x10d/0x4d0 [ 28.887632] rcu_core+0x8c8/0x2860 [ 28.888073] __do_softirq+0x1b7/0x7d4 [ 28.888558] [ 28.888774] Last potentially related work creation: [ 28.889355] kasan_save_stack+0x22/0x50 [ 28.889860] __kasan_record_aux_stack+0x8e/0xa0 [ 28.890436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.891156] remove_vma+0x139/0x170 [ 28.891618] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.892200] do_vmi_munmap+0x1f1/0x2b0 [ 28.892716] __vm_munmap+0x138/0x3a0 [ 28.893188] __x64_sys_munmap+0x59/0x80 [ 28.893688] do_syscall_64+0x3f/0x90 [ 28.894168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.894812] [ 28.895030] Second to last potentially related work creation: [ 28.895735] kasan_save_stack+0x22/0x50 [ 28.896243] __kasan_record_aux_stack+0x8e/0xa0 [ 28.896826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.897476] remove_vma+0x139/0x170 [ 28.897934] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.898518] do_vmi_munmap+0x1f1/0x2b0 [ 28.899020] mmap_region+0x1f9/0x2660 [ 28.899525] do_mmap+0x854/0xf00 [ 28.899951] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900473] ksys_mmap_pgoff+0x3af/0x500 [ 28.900976] do_syscall_64+0x3f/0x90 [ 28.901451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902107] [ 28.902323] The buggy address belongs to the object at ffff88800de1a488 [ 28.902323] which belongs to the cache vm_area_struct of size 168 [ 28.903815] The buggy address is located 88 bytes inside of [ 28.903815] freed 168-byte region [ffff88800de1a488, ffff88800de1a530) [ 28.905225] [ 28.905439] The buggy address belongs to the physical page: [ 28.906117] page:00000000582a3b3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde1a [ 28.907249] memcg:ffff88800ebaaa01 [ 28.907675] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.908333] page_type: 0xffffffff() [ 28.908786] raw: 0100000000000200 ffff8880087a0c80 ffffea00003872c0 dead000000000006 [ 28.909703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebaaa01 [ 28.910622] page dumped because: kasan: bad access detected [ 28.911299] [ 28.911516] Memory state around the buggy address: [ 28.912126] ffff88800de1a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.913061] ffff88800de1a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.913916] >ffff88800de1a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.914783] ^ [ 28.915570] ffff88800de1a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 28.916428] ffff88800de1a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.917291] ================================================================== [ 28.918220] Disabling lock debugging due to kernel taint [ 30.749996] BUG: Bad rss-counter state mm:0000000036c6630f type:MM_FILEPAGES val:33 [ 30.751730] BUG: Bad rss-counter state mm:0000000036c6630f type:MM_ANONPAGES val:22 [ 31.221572] BUG: Bad rss-counter state mm:000000008a860923 type:MM_FILEPAGES val:33 [ 31.222762] BUG: Bad rss-counter state mm:000000008a860923 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35051' (ECDSA) to the list of known hosts. 2023/06/21 00:50:29 fuzzer started 2023/06/21 00:50:29 dialing manager at localhost:36067 2023/06/21 00:50:29 checking machine... 2023/06/21 00:50:29 checking revisions... [ 31.995947] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:50:29 testing simple program... [ 32.052624] cgroup: Unknown subsys name 'net' [ 32.102182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c4d0000 RCX=0000000000000009 RDX=0000000000000000 RSI=ffff88800dc1c900 RDI=ffff88800c4d03f4 RBP=ffff8880087b8780 RSP=ffff8880169b7a20 R8 =ffff8880169b7a90 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800dc1c900 R13=0000000000000000 R14=ffff8880169b7a90 R15=ffffea00003be480 RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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 00007fe8594ff900 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=00007fe859ab4650 CR3=000000001c95c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff849f2d80 RBX=000000007301c077 RCX=0000000000000000 RDX=1ffffffff093e5eb RSI=ffffffff8219d5d5 RDI=0000000000000006 RBP=ffff8880197d7781 RSP=ffff8880197d7658 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=0000000000000002 R13=0000000000000001 R14=dffffc0000000000 R15=ffffffff849f2f5c RIP=ffffffff8219d614 RFL=00000217 [----APC] 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 00007fdbbeadb700 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=00007f60fd2c6ad0 CR3=0000000019766000 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=2038323a30353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000