syzkaller login: [ 35.008316] BUG: Bad rss-counter state mm:000000007c057f46 type:MM_FILEPAGES val:33 [ 35.009541] BUG: Bad rss-counter state mm:000000007c057f46 type:MM_ANONPAGES val:22 [ 35.044794] ================================================================== [ 35.045976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.047251] Read of size 8 at addr ffff88801a4d4228 by task sshd/228 [ 35.048161] [ 35.048414] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.049484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.050734] Call Trace: [ 35.051078] [ 35.051481] dump_stack_lvl+0x91/0xf0 [ 35.052067] print_report+0xcc/0x620 [ 35.052628] ? __virt_addr_valid+0x102/0x340 [ 35.053277] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.054058] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.054710] kasan_report+0xbe/0xf0 [ 35.055340] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.056037] vma_interval_tree_remove+0xc75/0xec0 [ 35.056667] vma_prepare+0xc54/0x11a0 [ 35.057171] __split_vma+0x5af/0x950 [ 35.057673] ? __pfx___split_vma+0x10/0x10 [ 35.058238] ? find_held_lock+0x2c/0x110 [ 35.058812] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.059406] ? lock_is_held_type+0x9f/0x120 [ 35.059975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.060613] ? mtree_range_walk+0x632/0x900 [ 35.061186] ? mas_walk+0x5c7/0x7c0 [ 35.061688] do_vmi_munmap+0x1f1/0x2b0 [ 35.062203] mmap_region+0x1f9/0x2660 [ 35.062724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.063262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.064009] ? __pfx_lock_acquire+0x10/0x10 [ 35.064565] ? __pfx_mmap_region+0x10/0x10 [ 35.065130] ? security_mmap_addr+0x7d/0xa0 [ 35.065684] ? get_unmapped_area+0x1f5/0x3f0 [ 35.066560] do_mmap+0x854/0xf00 [ 35.067028] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.067549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.068147] ksys_mmap_pgoff+0x3af/0x500 [ 35.068683] do_syscall_64+0x3f/0x90 [ 35.069185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.069866] RIP: 0033:0x7fe8a0055d82 [ 35.070368] 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 [ 35.072644] RSP: 002b:00007fffd79c0ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.073599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8a0055d82 [ 35.074506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe89f48f000 [ 35.075387] RBP: 00007fe89f48f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.076279] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad712e2ec0 [ 35.077174] R13: 00007fffd79c0ad0 R14: 00007fffd79c0b00 R15: 00007fffd79c0e60 [ 35.078080] [ 35.078394] [ 35.078626] Allocated by task 221: [ 35.079078] kasan_save_stack+0x22/0x50 [ 35.079606] kasan_set_track+0x25/0x30 [ 35.080124] __kasan_slab_alloc+0x59/0x70 [ 35.080681] kmem_cache_alloc+0x16b/0x370 [ 35.081226] vm_area_dup+0x20/0x160 [ 35.081694] __split_vma+0x170/0x950 [ 35.082187] split_vma+0xc6/0x110 [ 35.082668] mprotect_fixup+0x8d2/0xb30 [ 35.083209] do_mprotect_pkey+0x87e/0xd40 [ 35.083763] __x64_sys_mprotect+0x78/0xc0 [ 35.084320] do_syscall_64+0x3f/0x90 [ 35.084822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.085497] [ 35.085723] Freed by task 221: [ 35.086138] kasan_save_stack+0x22/0x50 [ 35.086657] kasan_set_track+0x25/0x30 [ 35.087183] kasan_save_free_info+0x2b/0x50 [ 35.087722] __kasan_slab_free+0x10a/0x190 [ 35.088266] kmem_cache_free+0x10d/0x4d0 [ 35.088859] rcu_core+0x8c8/0x2860 [ 35.089315] __do_softirq+0x1b7/0x7d4 [ 35.089799] [ 35.090023] Last potentially related work creation: [ 35.090647] kasan_save_stack+0x22/0x50 [ 35.091164] __kasan_record_aux_stack+0x8e/0xa0 [ 35.091753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.092409] remove_vma+0x139/0x170 [ 35.092872] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.093438] do_vmi_munmap+0x1f1/0x2b0 [ 35.093933] __vm_munmap+0x138/0x3a0 [ 35.094407] __x64_sys_munmap+0x59/0x80 [ 35.094915] do_syscall_64+0x3f/0x90 [ 35.095393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.096053] [ 35.096269] The buggy address belongs to the object at ffff88801a4d41d0 [ 35.096269] which belongs to the cache vm_area_struct of size 168 [ 35.097750] The buggy address is located 88 bytes inside of [ 35.097750] freed 168-byte region [ffff88801a4d41d0, ffff88801a4d4278) [ 35.099182] [ 35.099397] The buggy address belongs to the physical page: [ 35.100066] page:000000006d0a5e9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a4d4 [ 35.101169] memcg:ffff88801a4b1701 [ 35.101595] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.102236] page_type: 0xffffffff() [ 35.102693] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.103621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4b1701 [ 35.104535] page dumped because: kasan: bad access detected [ 35.105195] [ 35.105417] Memory state around the buggy address: [ 35.105995] ffff88801a4d4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.106867] ffff88801a4d4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.107723] >ffff88801a4d4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.108583] ^ [ 35.109147] ffff88801a4d4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.110005] ffff88801a4d4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.110878] ================================================================== [ 35.111841] Disabling lock debugging due to kernel taint [ 37.630060] BUG: Bad rss-counter state mm:000000002de67088 type:MM_FILEPAGES val:33 [ 37.631742] BUG: Bad rss-counter state mm:000000002de67088 type:MM_ANONPAGES val:22 [ 38.091056] BUG: Bad rss-counter state mm:0000000081d00bd2 type:MM_FILEPAGES val:33 [ 38.092727] BUG: Bad rss-counter state mm:0000000081d00bd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7284' (ECDSA) to the list of known hosts. 2023/06/20 07:26:46 fuzzer started 2023/06/20 07:26:46 dialing manager at localhost:44161 2023/06/20 07:26:46 checking machine... 2023/06/20 07:26:46 checking revisions... [ 38.812949] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:26:46 testing simple program... [ 38.851892] cgroup: Unknown subsys name 'net' [ 38.914808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:26:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff888014787638 RSP=ffff888014787570 R8 =0000000000000001 R9 =ffffed10028f0eba R10=ffff8880147875d7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fa76204a900 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=00007f4302a3a650 CR3=000000000c5fe000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=515231955277c1f200000000000ae988 XMM05=5b698b2a0c6eba9a0000000000135fd0 XMM06=94aac670ef06ff650000000000134dc0 XMM07=fb795ef6d657705600000000001253e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffca3ce7528 CR3=000000000c5d8000 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=36323a3730203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3733325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000