syzkaller login: [ 38.930541] BUG: Bad rss-counter state mm:00000000a73a083f type:MM_FILEPAGES val:33 [ 38.931829] BUG: Bad rss-counter state mm:00000000a73a083f type:MM_ANONPAGES val:22 [ 38.972415] ================================================================== [ 38.973385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.974420] Read of size 8 at addr ffff88800e724c20 by task sshd/219 [ 38.975239] [ 38.975470] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.976398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.977437] Call Trace: [ 38.977783] [ 38.978090] dump_stack_lvl+0x91/0xf0 [ 38.978623] print_report+0xcc/0x620 [ 38.979133] ? __virt_addr_valid+0x102/0x340 [ 38.979691] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980309] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980923] kasan_report+0xbe/0xf0 [ 38.981403] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.982028] vma_interval_tree_remove+0xc75/0xec0 [ 38.982639] vma_prepare+0xc54/0x11a0 [ 38.983126] __split_vma+0x5af/0x950 [ 38.983598] ? __pfx___split_vma+0x10/0x10 [ 38.984126] ? find_held_lock+0x2c/0x110 [ 38.984648] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.985217] ? lock_is_held_type+0x9f/0x120 [ 38.985770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.986396] ? mtree_range_walk+0x632/0x900 [ 38.986953] ? mas_walk+0x5c7/0x7c0 [ 38.987429] do_vmi_munmap+0x1f1/0x2b0 [ 38.987924] mmap_region+0x1f9/0x2660 [ 38.988412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.988922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.989640] ? __pfx_lock_acquire+0x10/0x10 [ 38.990172] ? __pfx_mmap_region+0x10/0x10 [ 38.990719] ? security_mmap_addr+0x7d/0xa0 [ 38.991260] ? get_unmapped_area+0x1f5/0x3f0 [ 38.991821] do_mmap+0x854/0xf00 [ 38.992271] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.992773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.993346] ksys_mmap_pgoff+0x3af/0x500 [ 38.993852] do_syscall_64+0x3f/0x90 [ 38.994353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995005] RIP: 0033:0x7f94fe130d82 [ 38.995472] 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 [ 38.997619] RSP: 002b:00007fffd062f558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.998665] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94fe130d82 [ 38.999510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94fd56a000 [ 39.000376] RBP: 00007f94fd56a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.001247] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635cded4ec0 [ 39.002108] R13: 00007fffd062f570 R14: 00007fffd062f5a0 R15: 00007fffd062f900 [ 39.003001] [ 39.003295] [ 39.003514] Allocated by task 212: [ 39.003947] kasan_save_stack+0x22/0x50 [ 39.004452] kasan_set_track+0x25/0x30 [ 39.004949] __kasan_slab_alloc+0x59/0x70 [ 39.005476] kmem_cache_alloc+0x16b/0x370 [ 39.005990] vm_area_dup+0x20/0x160 [ 39.006447] __split_vma+0x170/0x950 [ 39.006919] split_vma+0xc6/0x110 [ 39.007362] mprotect_fixup+0x8d2/0xb30 [ 39.007877] do_mprotect_pkey+0x87e/0xd40 [ 39.008410] __x64_sys_mprotect+0x78/0xc0 [ 39.008937] do_syscall_64+0x3f/0x90 [ 39.009413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010056] [ 39.010275] Freed by task 13: [ 39.010665] kasan_save_stack+0x22/0x50 [ 39.011174] kasan_set_track+0x25/0x30 [ 39.011667] kasan_save_free_info+0x2b/0x50 [ 39.012201] __kasan_slab_free+0x10a/0x190 [ 39.012733] kmem_cache_free+0x10d/0x4d0 [ 39.013254] rcu_core+0x8c8/0x2860 [ 39.013697] __do_softirq+0x1b7/0x7d4 [ 39.014180] [ 39.014410] Last potentially related work creation: [ 39.015000] kasan_save_stack+0x22/0x50 [ 39.015503] __kasan_record_aux_stack+0x8e/0xa0 [ 39.016085] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.016725] remove_vma+0x139/0x170 [ 39.017186] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.017745] do_vmi_munmap+0x1f1/0x2b0 [ 39.018234] __vm_munmap+0x138/0x3a0 [ 39.018717] __x64_sys_munmap+0x59/0x80 [ 39.019210] do_syscall_64+0x3f/0x90 [ 39.019685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.020332] [ 39.020547] The buggy address belongs to the object at ffff88800e724bc8 [ 39.020547] which belongs to the cache vm_area_struct of size 168 [ 39.022010] The buggy address is located 88 bytes inside of [ 39.022010] freed 168-byte region [ffff88800e724bc8, ffff88800e724c70) [ 39.023440] [ 39.023659] The buggy address belongs to the physical page: [ 39.024324] page:00000000f6da5fc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe724 [ 39.025417] memcg:ffff88800e354001 [ 39.025848] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.026518] page_type: 0xffffffff() [ 39.026970] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.027890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e354001 [ 39.028803] page dumped because: kasan: bad access detected [ 39.029464] [ 39.029683] Memory state around the buggy address: [ 39.030261] ffff88800e724b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.031136] ffff88800e724b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.031997] >ffff88800e724c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.032850] ^ [ 39.033383] ffff88800e724c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.034243] ffff88800e724d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.035131] ================================================================== [ 39.036205] Disabling lock debugging due to kernel taint [ 41.186882] BUG: Bad rss-counter state mm:000000005f1e07b9 type:MM_FILEPAGES val:33 [ 41.187875] BUG: Bad rss-counter state mm:000000005f1e07b9 type:MM_ANONPAGES val:22 [ 41.662164] BUG: Bad rss-counter state mm:000000006de17259 type:MM_FILEPAGES val:33 [ 41.663349] BUG: Bad rss-counter state mm:000000006de17259 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46951' (ECDSA) to the list of known hosts. 2023/06/20 19:05:42 fuzzer started 2023/06/20 19:05:43 dialing manager at localhost:36067 2023/06/20 19:05:43 checking machine... 2023/06/20 19:05:43 checking revisions... [ 42.295916] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:05:43 testing simple program... [ 42.344332] cgroup: Unknown subsys name 'net' [ 42.386215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f3f4dae1040 CR3=000000000d7c4000 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=d71fba3a3b483580ae4acc5fe9a77725 XMM02=ec2efd57dc4c00df000000000011c1d0 XMM03=24bd02cc94cfe373000000000011c2a0 XMM04=99dad28e628969dd00000000000ae988 XMM05=dfcdbad4f1609c370000000000132048 XMM06=806171799158d9670000000000131ed0 XMM07=e042d86d42eb936e0000000000122720 XMM08=24bd02cc94cfe373000000000011c2a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff88800cdefc70 RDI=ffff88806cf09aa0 RBP=ffff88800cdefc70 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88800cdefc70 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2ce2c6e900 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=00007ffd2780f80c CR3=000000000e378000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=3d616e696d68657420322e322e0e1d00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000