syzkaller login: [ 38.987685] BUG: Bad rss-counter state mm:00000000a5131fde type:MM_FILEPAGES val:33 [ 38.988386] BUG: Bad rss-counter state mm:00000000a5131fde type:MM_ANONPAGES val:22 [ 39.133511] ================================================================== [ 39.134071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.134669] Read of size 8 at addr ffff88800ec99228 by task sshd/222 [ 39.135157] [ 39.135301] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.135846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.136460] Call Trace: [ 39.136668] [ 39.136854] dump_stack_lvl+0x91/0xf0 [ 39.137177] print_report+0xcc/0x620 [ 39.138396] ? __virt_addr_valid+0x102/0x340 [ 39.138761] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.139207] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.139609] kasan_report+0xbe/0xf0 [ 39.139923] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.140371] vma_interval_tree_remove+0xc75/0xec0 [ 39.140761] vma_prepare+0xc54/0x11a0 [ 39.141072] __split_vma+0x5af/0x950 [ 39.141444] ? __pfx___split_vma+0x10/0x10 [ 39.141824] ? find_held_lock+0x2c/0x110 [ 39.142254] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.142669] ? lock_is_held_type+0x9f/0x120 [ 39.143024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.143463] ? mtree_range_walk+0x632/0x900 [ 39.143829] ? mas_walk+0x5c7/0x7c0 [ 39.144195] do_vmi_munmap+0x1f1/0x2b0 [ 39.144517] mmap_region+0x1f9/0x2660 [ 39.144835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.145220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.146252] ? __pfx_lock_acquire+0x10/0x10 [ 39.146591] ? __pfx_mmap_region+0x10/0x10 [ 39.146940] ? security_mmap_addr+0x7d/0xa0 [ 39.147372] ? get_unmapped_area+0x1f5/0x3f0 [ 39.147732] do_mmap+0x854/0xf00 [ 39.148024] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.148393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.148786] ksys_mmap_pgoff+0x3af/0x500 [ 39.149170] do_syscall_64+0x3f/0x90 [ 39.149626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.150071] RIP: 0033:0x7fae28db7d82 [ 39.152532] 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 [ 39.154840] RSP: 002b:00007ffc5a5e0cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.156496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae28db7d82 [ 39.157062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae281f1000 [ 39.158668] RBP: 00007fae281f1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.160008] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb2ab63ec0 [ 39.160625] R13: 00007ffc5a5e0cd0 R14: 00007ffc5a5e0d00 R15: 00007ffc5a5e1060 [ 39.161300] [ 39.161515] [ 39.161665] Allocated by task 215: [ 39.162059] kasan_save_stack+0x22/0x50 [ 39.162523] kasan_set_track+0x25/0x30 [ 39.162865] __kasan_slab_alloc+0x59/0x70 [ 39.163408] kmem_cache_alloc+0x16b/0x370 [ 39.163767] vm_area_dup+0x20/0x160 [ 39.164155] __split_vma+0x170/0x950 [ 39.164479] split_vma+0xc6/0x110 [ 39.164783] mprotect_fixup+0x8d2/0xb30 [ 39.165255] do_mprotect_pkey+0x87e/0xd40 [ 39.165639] __x64_sys_mprotect+0x78/0xc0 [ 39.166211] do_syscall_64+0x3f/0x90 [ 39.166541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.167210] [ 39.167361] Freed by task 13: [ 39.167631] kasan_save_stack+0x22/0x50 [ 39.168075] kasan_set_track+0x25/0x30 [ 39.168466] kasan_save_free_info+0x2b/0x50 [ 39.168913] __kasan_slab_free+0x10a/0x190 [ 39.169324] kmem_cache_free+0x10d/0x4d0 [ 39.169714] rcu_core+0x8c8/0x2860 [ 39.170019] __do_softirq+0x1b7/0x7d4 [ 39.170403] [ 39.170557] Last potentially related work creation: [ 39.170932] kasan_save_stack+0x22/0x50 [ 39.171310] __kasan_record_aux_stack+0x8e/0xa0 [ 39.171814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.172358] remove_vma+0x139/0x170 [ 39.172674] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.173054] do_vmi_munmap+0x1f1/0x2b0 [ 39.173456] __vm_munmap+0x138/0x3a0 [ 39.173824] __x64_sys_munmap+0x59/0x80 [ 39.186464] do_syscall_64+0x3f/0x90 [ 39.186802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.188294] [ 39.188444] Second to last potentially related work creation: [ 39.188902] kasan_save_stack+0x22/0x50 [ 39.190327] __kasan_record_aux_stack+0x8e/0xa0 [ 39.190723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.192216] remove_vma+0x139/0x170 [ 39.192528] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.192915] do_vmi_munmap+0x1f1/0x2b0 [ 39.194367] mmap_region+0x1f9/0x2660 [ 39.194698] do_mmap+0x854/0xf00 [ 39.194976] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.196357] ksys_mmap_pgoff+0x3af/0x500 [ 39.196708] do_syscall_64+0x3f/0x90 [ 39.197038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.198535] [ 39.198686] The buggy address belongs to the object at ffff88800ec991d0 [ 39.198686] which belongs to the cache vm_area_struct of size 168 [ 39.200729] The buggy address is located 88 bytes inside of [ 39.200729] freed 168-byte region [ffff88800ec991d0, ffff88800ec99278) [ 39.202731] [ 39.202881] The buggy address belongs to the physical page: [ 39.204439] page:000000000969bd74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec99 [ 39.206227] memcg:ffff88800d8c0501 [ 39.206519] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.206935] page_type: 0xffffffff() [ 39.208305] raw: 0100000000000200 ffff8880087a0c80 ffffea000038fc00 dead00000000000e [ 39.208924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8c0501 [ 39.210605] page dumped because: kasan: bad access detected [ 39.211052] [ 39.212258] Memory state around the buggy address: [ 39.212653] ffff88800ec99100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.214346] ffff88800ec99180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.214924] >ffff88800ec99200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.216551] ^ [ 39.216938] ffff88800ec99280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.218555] ffff88800ec99300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.220172] ================================================================== [ 39.233747] Disabling lock debugging due to kernel taint [ 41.825506] BUG: Bad rss-counter state mm:00000000cb9755d6 type:MM_FILEPAGES val:33 [ 41.826192] BUG: Bad rss-counter state mm:00000000cb9755d6 type:MM_ANONPAGES val:22 [ 43.793588] BUG: Bad rss-counter state mm:0000000025154246 type:MM_FILEPAGES val:33 [ 43.794247] BUG: Bad rss-counter state mm:0000000025154246 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24894' (ECDSA) to the list of known hosts. 2023/06/21 08:20:11 fuzzer started 2023/06/21 08:20:11 dialing manager at localhost:36067 2023/06/21 08:20:11 checking machine... 2023/06/21 08:20:11 checking revisions... [ 44.654985] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:20:11 testing simple program... [ 44.701924] cgroup: Unknown subsys name 'net' [ 44.747895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:20:11 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=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=00007f96c5a77328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801ca474f8 RCX=0000000000000000 RDX=ffff888016851b40 RSI=ffffffff81810e58 RDI=ffff888016852f84 RBP=00000000000d20c0 RSP=ffff88801ca47448 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000002000 R11=0000000000000282 R12=ffff88801ca47514 R13=ffff88801ca47500 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff81792408 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 =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=00007f860f3fb260 CR3=000000000d4aa000 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=756e696c2d34365f3638782f62696c2f XMM01=732e746964756162696c2f756e672d78 XMM02=00312e6f732e746964756162696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000