syzkaller login: [ 31.076875] BUG: Bad rss-counter state mm:000000003aef4713 type:MM_FILEPAGES val:33 [ 31.078217] BUG: Bad rss-counter state mm:000000003aef4713 type:MM_ANONPAGES val:22 [ 31.242051] ================================================================== [ 31.242998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.243942] Read of size 8 at addr ffff88801a522ed8 by task sshd/220 [ 31.244930] [ 31.245149] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.246032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.247042] Call Trace: [ 31.247366] [ 31.247653] dump_stack_lvl+0x91/0xf0 [ 31.248158] print_report+0xcc/0x620 [ 31.248648] ? __virt_addr_valid+0x102/0x340 [ 31.249203] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250478] kasan_report+0xbe/0xf0 [ 31.250957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251584] vma_interval_tree_remove+0xc75/0xec0 [ 31.252188] vma_prepare+0xc54/0x11a0 [ 31.252677] __split_vma+0x5af/0x950 [ 31.253161] ? __pfx___split_vma+0x10/0x10 [ 31.253709] ? find_held_lock+0x2c/0x110 [ 31.254251] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.254897] ? lock_is_held_type+0x9f/0x120 [ 31.255516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.256203] ? mtree_range_walk+0x632/0x900 [ 31.256842] ? mas_walk+0x5c7/0x7c0 [ 31.257388] do_vmi_munmap+0x1f1/0x2b0 [ 31.257967] mmap_region+0x1f9/0x2660 [ 31.258523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.259099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.259917] ? __pfx_lock_acquire+0x10/0x10 [ 31.260535] ? __pfx_mmap_region+0x10/0x10 [ 31.261140] ? security_mmap_addr+0x7d/0xa0 [ 31.261770] ? get_unmapped_area+0x1f5/0x3f0 [ 31.262413] do_mmap+0x854/0xf00 [ 31.262922] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.263494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.264136] ksys_mmap_pgoff+0x3af/0x500 [ 31.264725] do_syscall_64+0x3f/0x90 [ 31.265276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266035] RIP: 0033:0x7f361b29cd82 [ 31.266575] 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 [ 31.269025] RSP: 002b:00007fff3a788ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f361b29cd82 [ 31.271077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f361a6d6000 [ 31.272059] RBP: 00007f361a6d6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.272931] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595269bcec0 [ 31.273794] R13: 00007fff3a788b00 R14: 00007fff3a788b30 R15: 00007fff3a788e90 [ 31.274678] [ 31.274973] [ 31.275196] Allocated by task 213: [ 31.275633] kasan_save_stack+0x22/0x50 [ 31.276174] kasan_set_track+0x25/0x30 [ 31.276694] __kasan_slab_alloc+0x59/0x70 [ 31.277211] kmem_cache_alloc+0x16b/0x370 [ 31.277729] vm_area_dup+0x20/0x160 [ 31.278192] __split_vma+0x170/0x950 [ 31.278673] split_vma+0xc6/0x110 [ 31.279137] mprotect_fixup+0x8d2/0xb30 [ 31.279643] do_mprotect_pkey+0x87e/0xd40 [ 31.280165] __x64_sys_mprotect+0x78/0xc0 [ 31.280686] do_syscall_64+0x3f/0x90 [ 31.281162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281836] [ 31.282047] Freed by task 213: [ 31.282444] kasan_save_stack+0x22/0x50 [ 31.282950] kasan_set_track+0x25/0x30 [ 31.283454] kasan_save_free_info+0x2b/0x50 [ 31.283995] __kasan_slab_free+0x10a/0x190 [ 31.284531] kmem_cache_free+0x10d/0x4d0 [ 31.285036] rcu_core+0x8c8/0x2860 [ 31.285490] __do_softirq+0x1b7/0x7d4 [ 31.286046] [ 31.286259] Last potentially related work creation: [ 31.286852] kasan_save_stack+0x22/0x50 [ 31.287370] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288592] remove_vma+0x139/0x170 [ 31.289040] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289619] do_vmi_munmap+0x1f1/0x2b0 [ 31.290133] __vm_munmap+0x138/0x3a0 [ 31.290606] __x64_sys_munmap+0x59/0x80 [ 31.291105] do_syscall_64+0x3f/0x90 [ 31.291589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292235] [ 31.292457] The buggy address belongs to the object at ffff88801a522e80 [ 31.292457] which belongs to the cache vm_area_struct of size 168 [ 31.293958] The buggy address is located 88 bytes inside of [ 31.293958] freed 168-byte region [ffff88801a522e80, ffff88801a522f28) [ 31.295372] [ 31.295588] The buggy address belongs to the physical page: [ 31.296256] page:0000000026e3e3ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a522 [ 31.297359] memcg:ffff88800f6ddf01 [ 31.297818] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298476] page_type: 0xffffffff() [ 31.298934] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.299862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ddf01 [ 31.300783] page dumped because: kasan: bad access detected [ 31.301456] [ 31.301672] Memory state around the buggy address: [ 31.302259] ffff88801a522d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.303120] ffff88801a522e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.303972] >ffff88801a522e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304903] ^ [ 31.305733] ffff88801a522f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.306686] ffff88801a522f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.307680] ================================================================== [ 31.308784] Disabling lock debugging due to kernel taint [ 33.941437] BUG: Bad rss-counter state mm:000000007c07ff34 type:MM_FILEPAGES val:33 [ 33.942812] BUG: Bad rss-counter state mm:000000007c07ff34 type:MM_ANONPAGES val:22 [ 34.491489] BUG: Bad rss-counter state mm:00000000bf5f5bb7 type:MM_FILEPAGES val:33 [ 34.492644] BUG: Bad rss-counter state mm:00000000bf5f5bb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11409' (ECDSA) to the list of known hosts. 2023/06/21 04:21:59 fuzzer started 2023/06/21 04:21:59 dialing manager at localhost:36067 2023/06/21 04:21:59 checking machine... 2023/06/21 04:21:59 checking revisions... [ 35.122317] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:21:59 testing simple program... [ 35.168753] cgroup: Unknown subsys name 'net' [ 35.214902] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:21:58 Registers: info registers vcpu 0 RAX=ffff888013fee380 RBX=ffff888013fee380 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888013fee380 RBP=ffff888013fee380 RSP=ffff8880140e76d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=3830306234386136 R12=ffff888013fee408 R13=ffff888013fee380 R14=ffff888013fee2f0 R15=ffffffff87f35670 RIP=ffffffff8180f036 RFL=00000202 [-------] 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 00007fe0bdcff900 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=00007fe0bd134d50 CR3=000000000d810000 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=2637415e42041a9200000000000ae988 XMM05=23cd1d55feb0919d0000000000132918 XMM06=4fda316b135da52b0000000000131708 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f1b92b01618 CR3=000000000e72c000 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=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