syzkaller login: [ 31.179112] BUG: Bad rss-counter state mm:00000000c413b60e type:MM_FILEPAGES val:33 [ 31.180594] BUG: Bad rss-counter state mm:00000000c413b60e type:MM_ANONPAGES val:22 [ 31.329207] ================================================================== [ 31.330593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.332032] Read of size 8 at addr ffff88801698bb38 by task sshd/221 [ 31.333175] [ 31.333489] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.334708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.336100] Call Trace: [ 31.336560] [ 31.336974] dump_stack_lvl+0x91/0xf0 [ 31.337667] print_report+0xcc/0x620 [ 31.338344] ? __virt_addr_valid+0x102/0x340 [ 31.339118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.339982] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.340872] kasan_report+0xbe/0xf0 [ 31.341538] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342401] vma_interval_tree_remove+0xc75/0xec0 [ 31.343254] vma_prepare+0xc54/0x11a0 [ 31.343916] __split_vma+0x5af/0x950 [ 31.344574] ? __pfx___split_vma+0x10/0x10 [ 31.345321] ? find_held_lock+0x2c/0x110 [ 31.346050] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.346844] ? lock_is_held_type+0x9f/0x120 [ 31.347596] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.348470] ? mtree_range_walk+0x632/0x900 [ 31.349250] ? mas_walk+0x5c7/0x7c0 [ 31.349909] do_vmi_munmap+0x1f1/0x2b0 [ 31.350597] mmap_region+0x1f9/0x2660 [ 31.351272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.351994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.353019] ? __pfx_lock_acquire+0x10/0x10 [ 31.353769] ? __pfx_mmap_region+0x10/0x10 [ 31.354509] ? security_mmap_addr+0x7d/0xa0 [ 31.355270] ? get_unmapped_area+0x1f5/0x3f0 [ 31.356043] do_mmap+0x854/0xf00 [ 31.356654] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.357354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.358151] ksys_mmap_pgoff+0x3af/0x500 [ 31.358872] do_syscall_64+0x3f/0x90 [ 31.359542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.360472] RIP: 0033:0x7f4154f32d82 [ 31.361147] 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 [ 31.364167] RSP: 002b:00007ffdd0a48218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4154f32d82 [ 31.366671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f415436c000 [ 31.367899] RBP: 00007f415436c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368857] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563edda92ec0 [ 31.369800] R13: 00007ffdd0a48230 R14: 00007ffdd0a48260 R15: 00007ffdd0a485c0 [ 31.370759] [ 31.371085] [ 31.371324] Allocated by task 214: [ 31.371810] kasan_save_stack+0x22/0x50 [ 31.372371] kasan_set_track+0x25/0x30 [ 31.372950] __kasan_slab_alloc+0x59/0x70 [ 31.373535] kmem_cache_alloc+0x16b/0x370 [ 31.374118] vm_area_dup+0x20/0x160 [ 31.374639] __split_vma+0x170/0x950 [ 31.375162] split_vma+0xc6/0x110 [ 31.375655] mprotect_fixup+0x8d2/0xb30 [ 31.376221] do_mprotect_pkey+0x87e/0xd40 [ 31.376820] __x64_sys_mprotect+0x78/0xc0 [ 31.377436] do_syscall_64+0x3f/0x90 [ 31.377961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378681] [ 31.378922] Freed by task 214: [ 31.379377] kasan_save_stack+0x22/0x50 [ 31.379951] kasan_set_track+0x25/0x30 [ 31.380516] kasan_save_free_info+0x2b/0x50 [ 31.381120] __kasan_slab_free+0x10a/0x190 [ 31.381745] kmem_cache_free+0x10d/0x4d0 [ 31.382338] rcu_core+0x8c8/0x2860 [ 31.382858] __do_softirq+0x1b7/0x7d4 [ 31.383427] [ 31.383689] Last potentially related work creation: [ 31.384368] kasan_save_stack+0x22/0x50 [ 31.384960] __kasan_record_aux_stack+0x8e/0xa0 [ 31.385638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.386395] remove_vma+0x139/0x170 [ 31.386925] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.387567] do_vmi_munmap+0x1f1/0x2b0 [ 31.388145] __vm_munmap+0x138/0x3a0 [ 31.388684] __x64_sys_munmap+0x59/0x80 [ 31.389278] do_syscall_64+0x3f/0x90 [ 31.389858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390632] [ 31.390896] The buggy address belongs to the object at ffff88801698bae0 [ 31.390896] which belongs to the cache vm_area_struct of size 168 [ 31.392541] The buggy address is located 88 bytes inside of [ 31.392541] freed 168-byte region [ffff88801698bae0, ffff88801698bb88) [ 31.394117] [ 31.394358] The buggy address belongs to the physical page: [ 31.395103] page:00000000854c6965 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1698b [ 31.396337] memcg:ffff88800c573701 [ 31.396806] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.397620] page_type: 0xffffffff() [ 31.398128] raw: 0100000000000200 ffff88800879fc80 ffffea00003fadc0 dead000000000003 [ 31.399155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c573701 [ 31.400161] page dumped because: kasan: bad access detected [ 31.400902] [ 31.401151] Memory state around the buggy address: [ 31.401796] ffff88801698ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.402747] ffff88801698ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.403707] >ffff88801698bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.404639] ^ [ 31.405326] ffff88801698bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.406272] ffff88801698bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.407209] ================================================================== [ 31.408749] Disabling lock debugging due to kernel taint [ 33.394331] BUG: Bad rss-counter state mm:00000000cda69acc type:MM_FILEPAGES val:33 [ 33.395494] BUG: Bad rss-counter state mm:00000000cda69acc type:MM_ANONPAGES val:22 [ 33.852471] BUG: Bad rss-counter state mm:00000000a8283c17 type:MM_FILEPAGES val:33 [ 33.853247] BUG: Bad rss-counter state mm:00000000a8283c17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53464' (ECDSA) to the list of known hosts. 2023/06/20 02:19:42 fuzzer started 2023/06/20 02:19:42 dialing manager at localhost:44161 2023/06/20 02:19:42 checking machine... 2023/06/20 02:19:42 checking revisions... [ 34.532066] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:19:42 testing simple program... [ 34.565462] cgroup: Unknown subsys name 'net' [ 34.596565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:41 Registers: info registers vcpu 0 RAX=ffffffff84089480 RBX=00000000ffffffff RCX=0000000000000000 RDX=ffff88801a417d28 RSI=0000000000000001 RDI=ffffffff85c58900 RBP=ffffffff85c58900 RSP=ffff88801a417bf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=ffffffff85a63a00 R15=0000000000000001 RIP=ffffffff84089484 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 00007f56982ef900 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=00007f56988a6618 CR3=000000001958a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f60c21f30f0 CR3=000000000d6ee000 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=aec052b1439f0b8a11417c800a0ea7cc XMM02=000000000011ceb0ec2efd57dc4c00df XMM03=00000000001243f00cd303a159df26e4 XMM04=1ff4387b76f6ddcb00000000000ae988 XMM05=2bbf34270fecce5e0000000000134d40 XMM06=c291bd5c70af25b90000000000133de0 XMM07=e042d86d42eb936e0000000000124670 XMM08=0cd303a159df26e4000000000011cf10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000