syzkaller login: [ 30.810980] BUG: Bad rss-counter state mm:000000003f902ce0 type:MM_FILEPAGES val:33 [ 30.812015] BUG: Bad rss-counter state mm:000000003f902ce0 type:MM_ANONPAGES val:22 [ 30.979056] ================================================================== [ 30.980055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.980993] Read of size 8 at addr ffff88800f1754e0 by task sshd/219 [ 30.981862] [ 30.982123] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.982994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.983980] Call Trace: [ 30.984311] [ 30.984596] dump_stack_lvl+0x91/0xf0 [ 30.985087] print_report+0xcc/0x620 [ 30.985575] ? __virt_addr_valid+0x102/0x340 [ 30.986130] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.986747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.987395] kasan_report+0xbe/0xf0 [ 30.987873] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.988522] vma_interval_tree_remove+0xc75/0xec0 [ 30.989127] vma_prepare+0xc54/0x11a0 [ 30.989607] __split_vma+0x5af/0x950 [ 30.990083] ? __pfx___split_vma+0x10/0x10 [ 30.990609] ? find_held_lock+0x2c/0x110 [ 30.991155] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.991723] ? lock_is_held_type+0x9f/0x120 [ 30.992260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.992869] ? mtree_range_walk+0x632/0x900 [ 30.993423] ? mas_walk+0x5c7/0x7c0 [ 30.993895] do_vmi_munmap+0x1f1/0x2b0 [ 30.994390] mmap_region+0x1f9/0x2660 [ 30.994871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.995393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.996117] ? __pfx_lock_acquire+0x10/0x10 [ 30.996652] ? __pfx_mmap_region+0x10/0x10 [ 30.997188] ? security_mmap_addr+0x7d/0xa0 [ 30.997716] ? get_unmapped_area+0x1f5/0x3f0 [ 30.998279] do_mmap+0x854/0xf00 [ 30.998727] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.999233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.999797] ksys_mmap_pgoff+0x3af/0x500 [ 31.000304] do_syscall_64+0x3f/0x90 [ 31.000785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.001431] RIP: 0033:0x7fa52c9d3d82 [ 31.001888] 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 [ 31.004057] RSP: 002b:00007fffed04f678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.004969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa52c9d3d82 [ 31.005820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa52be0d000 [ 31.006663] RBP: 00007fa52be0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.007519] R10: 0000000000000812 R11: 0000000000000206 R12: 000055897d89eec0 [ 31.008370] R13: 00007fffed04f690 R14: 00007fffed04f6c0 R15: 00007fffed04fa20 [ 31.009234] [ 31.009529] [ 31.009747] Allocated by task 212: [ 31.010176] kasan_save_stack+0x22/0x50 [ 31.010680] kasan_set_track+0x25/0x30 [ 31.011183] __kasan_slab_alloc+0x59/0x70 [ 31.011717] kmem_cache_alloc+0x16b/0x370 [ 31.012240] vm_area_dup+0x20/0x160 [ 31.012693] __split_vma+0x170/0x950 [ 31.013163] split_vma+0xc6/0x110 [ 31.013604] mprotect_fixup+0x8d2/0xb30 [ 31.014106] do_mprotect_pkey+0x87e/0xd40 [ 31.014634] __x64_sys_mprotect+0x78/0xc0 [ 31.015185] do_syscall_64+0x3f/0x90 [ 31.015660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.016311] [ 31.016525] Freed by task 212: [ 31.016915] kasan_save_stack+0x22/0x50 [ 31.017418] kasan_set_track+0x25/0x30 [ 31.017910] kasan_save_free_info+0x2b/0x50 [ 31.018441] __kasan_slab_free+0x10a/0x190 [ 31.018975] kmem_cache_free+0x10d/0x4d0 [ 31.019489] rcu_core+0x8c8/0x2860 [ 31.019935] __do_softirq+0x1b7/0x7d4 [ 31.020415] [ 31.020630] Last potentially related work creation: [ 31.021213] kasan_save_stack+0x22/0x50 [ 31.021723] __kasan_record_aux_stack+0x8e/0xa0 [ 31.022309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.022957] remove_vma+0x139/0x170 [ 31.023484] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.024046] do_vmi_munmap+0x1f1/0x2b0 [ 31.024534] __vm_munmap+0x138/0x3a0 [ 31.024998] __x64_sys_munmap+0x59/0x80 [ 31.025498] do_syscall_64+0x3f/0x90 [ 31.025972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026613] [ 31.026828] The buggy address belongs to the object at ffff88800f175488 [ 31.026828] which belongs to the cache vm_area_struct of size 168 [ 31.028328] The buggy address is located 88 bytes inside of [ 31.028328] freed 168-byte region [ffff88800f175488, ffff88800f175530) [ 31.029735] [ 31.029953] The buggy address belongs to the physical page: [ 31.030621] page:000000001c022ad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf175 [ 31.031713] memcg:ffff888009719501 [ 31.032139] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.032784] page_type: 0xffffffff() [ 31.033238] raw: 0100000000000200 ffff8880087a0c80 ffffea0000265d00 dead000000000002 [ 31.034165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009719501 [ 31.035093] page dumped because: kasan: bad access detected [ 31.035759] [ 31.035976] Memory state around the buggy address: [ 31.036558] ffff88800f175380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.037433] ffff88800f175400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.038293] >ffff88800f175480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.039154] ^ [ 31.039908] ffff88800f175500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.040779] ffff88800f175580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.041633] ================================================================== [ 31.042559] Disabling lock debugging due to kernel taint [ 33.642309] BUG: Bad rss-counter state mm:000000009e1ec7f3 type:MM_FILEPAGES val:33 [ 33.643486] BUG: Bad rss-counter state mm:000000009e1ec7f3 type:MM_ANONPAGES val:22 [ 34.111831] BUG: Bad rss-counter state mm:00000000f077a8ea type:MM_FILEPAGES val:33 [ 34.113024] BUG: Bad rss-counter state mm:00000000f077a8ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31261' (ECDSA) to the list of known hosts. 2023/06/20 14:09:17 fuzzer started 2023/06/20 14:09:17 dialing manager at localhost:36067 2023/06/20 14:09:17 checking machine... 2023/06/20 14:09:17 checking revisions... [ 34.747731] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:09:17 testing simple program... [ 34.800181] cgroup: Unknown subsys name 'net' [ 34.835464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:17 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff888015c4fd28 RSP=ffff888015c4fc60 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000db R11=0000000000000000 R12=0000000000000015 R13=ffff888015c4fd60 R14=0000000000000015 R15=ffffc9000068d668 RIP=ffffffff815a72aa 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 00007f00c3a0b900 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=00007f171b8f8650 CR3=000000000d5a2000 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=6a631caf032cb70200000000000ae988 XMM05=3548361197eb74fe0000000000133380 XMM06=806171799158d9670000000000132170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffff8880087f7120 RCX=0000000000000000 RDX=ffff888019501b40 RSI=ffffffff818e9b91 RDI=0000000000000004 RBP=0000000000000008 RSP=ffff888009587d50 R8 =0000000000000004 R9 =0000000000000004 R10=0000000000000000 R11=0000000000000000 R12=ffff8880087f70c0 R13=0000000000000004 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c086b 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 00007f171b343900 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=00007f171b8fb0b0 CR3=0000000016648000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000