syzkaller login: [ 23.887258] BUG: Bad rss-counter state mm:0000000052e30c97 type:MM_FILEPAGES val:33 [ 23.888505] BUG: Bad rss-counter state mm:0000000052e30c97 type:MM_ANONPAGES val:22 [ 23.935284] ================================================================== [ 23.936229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.937210] Read of size 8 at addr ffff88800e619798 by task sshd/219 [ 23.938022] [ 23.938249] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 23.939187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.940213] Call Trace: [ 23.940556] [ 23.940858] dump_stack_lvl+0x91/0xf0 [ 23.941368] print_report+0xcc/0x620 [ 23.941894] ? __virt_addr_valid+0x102/0x340 [ 23.942655] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943324] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943977] kasan_report+0xbe/0xf0 [ 23.944477] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945133] vma_interval_tree_remove+0xc75/0xec0 [ 23.945779] vma_prepare+0xc54/0x11a0 [ 23.946283] __split_vma+0x5af/0x950 [ 23.946793] ? __pfx___split_vma+0x10/0x10 [ 23.947362] ? find_held_lock+0x2c/0x110 [ 23.947914] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.948497] ? lock_is_held_type+0x9f/0x120 [ 23.949076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.949719] ? mtree_range_walk+0x632/0x900 [ 23.950296] ? mas_walk+0x5c7/0x7c0 [ 23.950815] do_vmi_munmap+0x1f1/0x2b0 [ 23.951347] mmap_region+0x1f9/0x2660 [ 23.951860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.952391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.953161] ? __pfx_lock_acquire+0x10/0x10 [ 23.953789] ? __pfx_mmap_region+0x10/0x10 [ 23.954507] ? security_mmap_addr+0x7d/0xa0 [ 23.955132] ? get_unmapped_area+0x1f5/0x3f0 [ 23.955807] do_mmap+0x854/0xf00 [ 23.956401] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.957080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.957818] ksys_mmap_pgoff+0x3af/0x500 [ 23.958353] do_syscall_64+0x3f/0x90 [ 23.958892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959597] RIP: 0033:0x7f4d6942fd82 [ 23.960078] 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 [ 23.962327] RSP: 002b:00007ffcee93c3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.963307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d6942fd82 [ 23.964214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d68869000 [ 23.965116] RBP: 00007f4d68869000 R08: 0000000000000009 R09: 0000000000001000 [ 23.966015] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c7386dec0 [ 23.966919] R13: 00007ffcee93c400 R14: 00007ffcee93c430 R15: 00007ffcee93c790 [ 23.967842] [ 23.968144] [ 23.968370] Allocated by task 212: [ 23.968829] kasan_save_stack+0x22/0x50 [ 23.969360] kasan_set_track+0x25/0x30 [ 23.969900] __kasan_slab_alloc+0x59/0x70 [ 23.970454] kmem_cache_alloc+0x16b/0x370 [ 23.971022] vm_area_dup+0x20/0x160 [ 23.971499] __split_vma+0x170/0x950 [ 23.971993] split_vma+0xc6/0x110 [ 23.972446] mprotect_fixup+0x8d2/0xb30 [ 23.972985] do_mprotect_pkey+0x87e/0xd40 [ 23.973532] __x64_sys_mprotect+0x78/0xc0 [ 23.974105] do_syscall_64+0x3f/0x90 [ 23.974616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.975318] [ 23.975553] Freed by task 212: [ 23.975970] kasan_save_stack+0x22/0x50 [ 23.976489] kasan_set_track+0x25/0x30 [ 23.977015] kasan_save_free_info+0x2b/0x50 [ 23.977594] __kasan_slab_free+0x10a/0x190 [ 23.978148] kmem_cache_free+0x10d/0x4d0 [ 23.978693] rcu_core+0x8c8/0x2860 [ 23.979178] __do_softirq+0x1b7/0x7d4 [ 23.979688] [ 23.979908] Last potentially related work creation: [ 23.980528] kasan_save_stack+0x22/0x50 [ 23.981062] __kasan_record_aux_stack+0x8e/0xa0 [ 23.981675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.982345] remove_vma+0x139/0x170 [ 23.982838] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.983434] do_vmi_munmap+0x1f1/0x2b0 [ 23.984026] __vm_munmap+0x138/0x3a0 [ 23.984517] __x64_sys_munmap+0x59/0x80 [ 23.985040] do_syscall_64+0x3f/0x90 [ 23.985542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.986226] [ 23.986455] Second to last potentially related work creation: [ 23.987193] kasan_save_stack+0x22/0x50 [ 23.987730] __kasan_record_aux_stack+0x8e/0xa0 [ 23.988333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.989009] remove_vma+0x139/0x170 [ 23.989482] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.990082] do_vmi_munmap+0x1f1/0x2b0 [ 23.990609] mmap_region+0x1f9/0x2660 [ 23.991118] do_mmap+0x854/0xf00 [ 23.991572] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.992084] ksys_mmap_pgoff+0x3af/0x500 [ 23.992624] do_syscall_64+0x3f/0x90 [ 23.993120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.993812] [ 23.994040] The buggy address belongs to the object at ffff88800e619740 [ 23.994040] which belongs to the cache vm_area_struct of size 168 [ 23.995632] The buggy address is located 88 bytes inside of [ 23.995632] freed 168-byte region [ffff88800e619740, ffff88800e6197e8) [ 23.997121] [ 23.997349] The buggy address belongs to the physical page: [ 23.998061] page:000000009cc65941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe619 [ 23.999217] memcg:ffff88800e4c1601 [ 23.999681] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.000362] page_type: 0xffffffff() [ 24.000850] raw: 0100000000000200 ffff88800879fc80 ffffea0000399340 dead000000000004 [ 24.001834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4c1601 [ 24.002783] page dumped because: kasan: bad access detected [ 24.003482] [ 24.003717] Memory state around the buggy address: [ 24.004324] ffff88800e619680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.005220] ffff88800e619700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.006131] >ffff88800e619780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.007054] ^ [ 24.007563] ffff88800e619800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.008410] ffff88800e619880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.009272] ================================================================== [ 24.010231] Disabling lock debugging due to kernel taint [ 26.404513] BUG: Bad rss-counter state mm:00000000a6a15fac type:MM_FILEPAGES val:33 [ 26.405675] BUG: Bad rss-counter state mm:00000000a6a15fac type:MM_ANONPAGES val:22 [ 26.862111] BUG: Bad rss-counter state mm:00000000281dde04 type:MM_FILEPAGES val:33 [ 26.863502] BUG: Bad rss-counter state mm:00000000281dde04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13253' (ECDSA) to the list of known hosts. 2023/06/20 04:59:28 fuzzer started 2023/06/20 04:59:28 dialing manager at localhost:44161 2023/06/20 04:59:28 checking machine... 2023/06/20 04:59:28 checking revisions... [ 27.532521] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:59:28 testing simple program... [ 27.578371] cgroup: Unknown subsys name 'net' [ 27.619950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:28 Registers: info registers vcpu 0 RAX=ffff88800f3b1410 RBX=ffff888008d7fdc8 RCX=1ffff110011affbb RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008d7fdd8 RBP=0000000000000001 RSP=ffff888008d7fd30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d7fdc8 R14=ffff88806ce35000 R15=ffff88800f3b12e0 RIP=ffffffff8137fc68 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 0000000000000000 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=00007effc0849650 CR3=000000000c678000 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=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 info registers vcpu 1 RAX=000000001b81653d RBX=ffff888015c76fa8 RCX=0000000000000000 RDX=000000000000007c RSI=ffff88800e6ad100 RDI=ffff888014387678 RBP=ffff888015c76cf8 RSP=ffff888014387600 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000004 R11=00000000000b6c88 R12=ffff88800e6ad100 R13=ffff88801011c000 R14=ffff88801011c738 R15=ffff888014387678 RIP=ffffffff81f9a494 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f683545a900 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=00007f6834858480 CR3=000000000cc3c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ffc2d9a70207c7dc00000000000ae988 XMM05=db06ce96933b53710000000000136e80 XMM06=806171799158d9670000000000135900 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000