syzkaller login: [ 30.808567] BUG: Bad rss-counter state mm:00000000f4319ca1 type:MM_FILEPAGES val:33 [ 30.810226] BUG: Bad rss-counter state mm:00000000f4319ca1 type:MM_ANONPAGES val:22 [ 30.974624] ================================================================== [ 30.975522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.976462] Read of size 8 at addr ffff88800ed45ed8 by task sshd/219 [ 30.977235] [ 30.977615] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.978510] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.979489] Call Trace: [ 30.979823] [ 30.980111] dump_stack_lvl+0x91/0xf0 [ 30.980605] print_report+0xcc/0x620 [ 30.981109] ? __virt_addr_valid+0x102/0x340 [ 30.981667] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982276] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982891] kasan_report+0xbe/0xf0 [ 30.983371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983985] vma_interval_tree_remove+0xc75/0xec0 [ 30.984590] vma_prepare+0xc54/0x11a0 [ 30.985080] __split_vma+0x5af/0x950 [ 30.985549] ? __pfx___split_vma+0x10/0x10 [ 30.986073] ? find_held_lock+0x2c/0x110 [ 30.986591] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.987147] ? mark_held_locks+0x9e/0xe0 [ 30.987649] ? lock_is_held_type+0x9f/0x120 [ 30.988188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.988800] ? mtree_range_walk+0x632/0x900 [ 30.989365] ? mas_walk+0x5c7/0x7c0 [ 30.989843] do_vmi_munmap+0x1f1/0x2b0 [ 30.990335] mmap_region+0x1f9/0x2660 [ 30.990813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.991330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.992040] ? __pfx_lock_acquire+0x10/0x10 [ 30.992576] ? __pfx_mmap_region+0x10/0x10 [ 30.993124] ? security_mmap_addr+0x7d/0xa0 [ 30.993655] ? get_unmapped_area+0x1f5/0x3f0 [ 30.994209] do_mmap+0x854/0xf00 [ 30.994649] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.995145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.995706] ksys_mmap_pgoff+0x3af/0x500 [ 30.996209] do_syscall_64+0x3f/0x90 [ 30.996691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997345] RIP: 0033:0x7f776aec9d82 [ 30.997807] 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 [ 30.999956] RSP: 002b:00007ffd4cf72918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.000922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f776aec9d82 [ 31.001792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f776a303000 [ 31.002639] RBP: 00007f776a303000 R08: 0000000000000009 R09: 0000000000001000 [ 31.003491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f70286fd90 [ 31.004343] R13: 00007ffd4cf72930 R14: 00007ffd4cf72960 R15: 00007ffd4cf72cc0 [ 31.005205] [ 31.005501] [ 31.005717] Allocated by task 212: [ 31.006146] kasan_save_stack+0x22/0x50 [ 31.006652] kasan_set_track+0x25/0x30 [ 31.007146] __kasan_slab_alloc+0x59/0x70 [ 31.007675] kmem_cache_alloc+0x16b/0x370 [ 31.008196] vm_area_dup+0x20/0x160 [ 31.008658] __split_vma+0x170/0x950 [ 31.009142] split_vma+0xc6/0x110 [ 31.009587] mprotect_fixup+0x8d2/0xb30 [ 31.010106] do_mprotect_pkey+0x87e/0xd40 [ 31.010649] __x64_sys_mprotect+0x78/0xc0 [ 31.011189] do_syscall_64+0x3f/0x90 [ 31.011688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012351] [ 31.012576] Freed by task 212: [ 31.012999] kasan_save_stack+0x22/0x50 [ 31.013520] kasan_set_track+0x25/0x30 [ 31.014029] kasan_save_free_info+0x2b/0x50 [ 31.014583] __kasan_slab_free+0x10a/0x190 [ 31.015141] kmem_cache_free+0x10d/0x4d0 [ 31.015660] rcu_core+0x8c8/0x2860 [ 31.016102] __do_softirq+0x1b7/0x7d4 [ 31.016586] [ 31.016804] Last potentially related work creation: [ 31.017402] kasan_save_stack+0x22/0x50 [ 31.017916] __kasan_record_aux_stack+0x8e/0xa0 [ 31.018494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.019248] remove_vma+0x139/0x170 [ 31.019707] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.020259] do_vmi_munmap+0x1f1/0x2b0 [ 31.020740] __vm_munmap+0x138/0x3a0 [ 31.021226] __x64_sys_munmap+0x59/0x80 [ 31.021721] do_syscall_64+0x3f/0x90 [ 31.022198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022838] [ 31.023052] Second to last potentially related work creation: [ 31.023765] kasan_save_stack+0x22/0x50 [ 31.024282] __kasan_record_aux_stack+0x8e/0xa0 [ 31.024883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.025538] remove_vma+0x139/0x170 [ 31.026004] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.026588] do_vmi_munmap+0x1f1/0x2b0 [ 31.027096] mmap_region+0x1f9/0x2660 [ 31.027600] do_mmap+0x854/0xf00 [ 31.028052] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.028558] ksys_mmap_pgoff+0x3af/0x500 [ 31.029082] do_syscall_64+0x3f/0x90 [ 31.029571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030235] [ 31.030458] The buggy address belongs to the object at ffff88800ed45e80 [ 31.030458] which belongs to the cache vm_area_struct of size 168 [ 31.031980] The buggy address is located 88 bytes inside of [ 31.031980] freed 168-byte region [ffff88800ed45e80, ffff88800ed45f28) [ 31.033459] [ 31.033680] The buggy address belongs to the physical page: [ 31.034367] page:00000000b0f0a745 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed45 [ 31.035501] memcg:ffff88800e617b01 [ 31.035952] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.036676] page_type: 0xffffffff() [ 31.037149] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.038121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e617b01 [ 31.039067] page dumped because: kasan: bad access detected [ 31.039747] [ 31.039967] Memory state around the buggy address: [ 31.040582] ffff88800ed45d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.041493] ffff88800ed45e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.042384] >ffff88800ed45e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.043271] ^ [ 31.044025] ffff88800ed45f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.044927] ffff88800ed45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.045806] ================================================================== [ 31.046771] Disabling lock debugging due to kernel taint [ 33.915786] BUG: Bad rss-counter state mm:00000000b1e59690 type:MM_FILEPAGES val:33 [ 33.916986] BUG: Bad rss-counter state mm:00000000b1e59690 type:MM_ANONPAGES val:22 [ 34.332673] BUG: Bad rss-counter state mm:000000002c75c7ef type:MM_FILEPAGES val:33 [ 34.334033] BUG: Bad rss-counter state mm:000000002c75c7ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30661' (ECDSA) to the list of known hosts. 2023/06/20 18:09:18 fuzzer started 2023/06/20 18:09:18 dialing manager at localhost:36067 2023/06/20 18:09:18 checking machine... 2023/06/20 18:09:18 checking revisions... [ 35.053460] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:09:18 testing simple program... [ 35.099885] cgroup: Unknown subsys name 'net' [ 35.152283] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d9a3680 RSI=ffffffff81f1756e RDI=0000000000000005 RBP=ffff888009b257d8 RSP=ffff888017caf858 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=ffffed1002f95f0d R15=0000000000000000 RIP=ffffffff81f17582 RFL=00000282 [--S----] 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 00007fc44408b900 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=00007fc444640650 CR3=000000000c580000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ff9671c02c0 CR3=000000000c456000 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=9713cdbfa6eaf2845540d0552b74822e XMM02=000000000011a8b0ec2efd57dc4c00df XMM03=000000000012212009c3e21ab7b2a6b6 XMM04=37c045dfdbdc0e2900000000000ae988 XMM05=19e9129bd510f23500000000001333f0 XMM06=cea8922017eb69a00000000000132258 XMM07=e042d86d42eb936e00000000001223a0 XMM08=09c3e21ab7b2a6b6000000000011a910 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000