syzkaller login: [ 43.794392] BUG: Bad rss-counter state mm:000000002e80b8dd type:MM_FILEPAGES val:33 [ 43.795413] BUG: Bad rss-counter state mm:000000002e80b8dd type:MM_ANONPAGES val:22 [ 43.952049] ================================================================== [ 43.952994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.953933] Read of size 8 at addr ffff88800ea58c20 by task sshd/219 [ 43.954714] [ 43.954935] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.956010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.957022] Call Trace: [ 43.957343] [ 43.957631] dump_stack_lvl+0x91/0xf0 [ 43.958136] print_report+0xcc/0x620 [ 43.958629] ? __virt_addr_valid+0x102/0x340 [ 43.959177] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.959802] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.960423] kasan_report+0xbe/0xf0 [ 43.960913] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.961539] vma_interval_tree_remove+0xc75/0xec0 [ 43.962149] vma_prepare+0xc54/0x11a0 [ 43.962641] __split_vma+0x5af/0x950 [ 43.963115] ? __pfx___split_vma+0x10/0x10 [ 43.963641] ? find_held_lock+0x2c/0x110 [ 43.964177] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.964774] ? lock_is_held_type+0x9f/0x120 [ 43.965322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.965936] ? mtree_range_walk+0x632/0x900 [ 43.966487] ? mas_walk+0x5c7/0x7c0 [ 43.966960] do_vmi_munmap+0x1f1/0x2b0 [ 43.967460] mmap_region+0x1f9/0x2660 [ 43.967949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.968463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.969210] ? __pfx_lock_acquire+0x10/0x10 [ 43.969758] ? __pfx_mmap_region+0x10/0x10 [ 43.970302] ? security_mmap_addr+0x7d/0xa0 [ 43.970852] ? get_unmapped_area+0x1f5/0x3f0 [ 43.971402] do_mmap+0x854/0xf00 [ 43.971855] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.972361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.972951] ksys_mmap_pgoff+0x3af/0x500 [ 43.973469] do_syscall_64+0x3f/0x90 [ 43.973949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.974609] RIP: 0033:0x7fa1ffad2d82 [ 43.975072] 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 [ 43.977252] RSP: 002b:00007ffebabed0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.978177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1ffad2d82 [ 43.979038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1fef0c000 [ 43.979898] RBP: 00007fa1fef0c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.980777] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f37bd39d90 [ 43.981631] R13: 00007ffebabed0d0 R14: 00007ffebabed100 R15: 00007ffebabed460 [ 43.982504] [ 43.982808] [ 43.983024] Allocated by task 212: [ 43.983457] kasan_save_stack+0x22/0x50 [ 43.983967] kasan_set_track+0x25/0x30 [ 43.984468] __kasan_slab_alloc+0x59/0x70 [ 43.985009] kmem_cache_alloc+0x16b/0x370 [ 43.985527] vm_area_dup+0x20/0x160 [ 43.985982] __split_vma+0x170/0x950 [ 43.986465] split_vma+0xc6/0x110 [ 43.986910] mprotect_fixup+0x8d2/0xb30 [ 43.987415] do_mprotect_pkey+0x87e/0xd40 [ 43.987935] __x64_sys_mprotect+0x78/0xc0 [ 43.988464] do_syscall_64+0x3f/0x90 [ 43.988967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.989627] [ 43.989847] Freed by task 13: [ 43.990247] kasan_save_stack+0x22/0x50 [ 43.990755] kasan_set_track+0x25/0x30 [ 43.991256] kasan_save_free_info+0x2b/0x50 [ 43.991799] __kasan_slab_free+0x10a/0x190 [ 43.992349] kmem_cache_free+0x10d/0x4d0 [ 43.992872] rcu_core+0x8c8/0x2860 [ 43.993326] __do_softirq+0x1b7/0x7d4 [ 43.993814] [ 43.994039] Last potentially related work creation: [ 43.994638] kasan_save_stack+0x22/0x50 [ 43.995152] __kasan_record_aux_stack+0x8e/0xa0 [ 43.995732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.996383] remove_vma+0x139/0x170 [ 43.996871] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.997505] do_vmi_munmap+0x1f1/0x2b0 [ 43.998002] __vm_munmap+0x138/0x3a0 [ 43.998484] __x64_sys_munmap+0x59/0x80 [ 43.998991] do_syscall_64+0x3f/0x90 [ 43.999483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.000144] [ 44.000368] The buggy address belongs to the object at ffff88800ea58bc8 [ 44.000368] which belongs to the cache vm_area_struct of size 168 [ 44.001884] The buggy address is located 88 bytes inside of [ 44.001884] freed 168-byte region [ffff88800ea58bc8, ffff88800ea58c70) [ 44.003317] [ 44.003534] The buggy address belongs to the physical page: [ 44.004198] page:00000000f5147028 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea58 [ 44.005302] memcg:ffff88800cfa1001 [ 44.005733] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.006382] page_type: 0xffffffff() [ 44.006841] raw: 0100000000000200 ffff88800879fc80 ffffea0000351500 dead000000000008 [ 44.007779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfa1001 [ 44.008717] page dumped because: kasan: bad access detected [ 44.009384] [ 44.009604] Memory state around the buggy address: [ 44.010187] ffff88800ea58b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.011057] ffff88800ea58b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.011928] >ffff88800ea58c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.012805] ^ [ 44.013339] ffff88800ea58c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.014201] ffff88800ea58d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.015067] ================================================================== [ 44.016002] Disabling lock debugging due to kernel taint [ 46.167052] BUG: Bad rss-counter state mm:000000002934df33 type:MM_FILEPAGES val:33 [ 46.168233] BUG: Bad rss-counter state mm:000000002934df33 type:MM_ANONPAGES val:22 [ 46.667769] BUG: Bad rss-counter state mm:0000000098b13a3e type:MM_FILEPAGES val:33 [ 46.668987] BUG: Bad rss-counter state mm:0000000098b13a3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18474' (ECDSA) to the list of known hosts. 2023/06/19 15:39:29 fuzzer started 2023/06/19 15:39:29 dialing manager at localhost:44161 2023/06/19 15:39:29 checking machine... 2023/06/19 15:39:29 checking revisions... [ 47.325089] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:39:29 testing simple program... [ 47.370193] cgroup: Unknown subsys name 'net' [ 47.427072] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=1ffff11002b53f82 RDX=ffff888008fe3680 RSI=ffffffff81402abe RDI=ffff888015a9fd18 RBP=0000000000000000 RSP=ffff888015a9fbd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000e94 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff81402ac3 RFL=00000293 [--S-A-C] 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 00007f8e6144c700 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=00007fd4367e30b0 CR3=000000000fe2a000 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=39333a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383134 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007f4ecf2aac40 CR3=000000000efb4000 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=805a88754137f29fc744cdfce0afc0b8 XMM02=000000000011d0e0eff9b2d0a8fce9cb XMM03=000000000011d1b02c67c8bc2e329bc3 XMM04=7b9914e02a8f4adb00000000000ae988 XMM05=7d250da8e85a6d960000000000134bb0 XMM06=4fda316b135da52b0000000000133c50 XMM07=e042d86d42eb936e0000000000123d70 XMM08=a37a2749792c8a70000000000011d1b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000