syzkaller login: [ 31.092892] BUG: Bad rss-counter state mm:00000000b4c7d5d9 type:MM_FILEPAGES val:33 [ 31.094047] BUG: Bad rss-counter state mm:00000000b4c7d5d9 type:MM_ANONPAGES val:22 [ 31.132024] ================================================================== [ 31.132993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.134040] Read of size 8 at addr ffff88800fe5a880 by task sshd/222 [ 31.134777] [ 31.134990] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.136050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.137101] Call Trace: [ 31.137459] [ 31.137800] dump_stack_lvl+0x91/0xf0 [ 31.138286] print_report+0xcc/0x620 [ 31.138829] ? __virt_addr_valid+0x102/0x340 [ 31.139369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140016] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140682] kasan_report+0xbe/0xf0 [ 31.141217] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141819] vma_interval_tree_remove+0xc75/0xec0 [ 31.142410] vma_prepare+0xc54/0x11a0 [ 31.142872] __split_vma+0x5af/0x950 [ 31.143328] ? __pfx___split_vma+0x10/0x10 [ 31.143844] ? find_held_lock+0x2c/0x110 [ 31.144427] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.145001] ? lock_is_held_type+0x9f/0x120 [ 31.145526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.146115] ? mtree_range_walk+0x632/0x900 [ 31.146651] ? mas_walk+0x5c7/0x7c0 [ 31.147113] do_vmi_munmap+0x1f1/0x2b0 [ 31.147590] mmap_region+0x1f9/0x2660 [ 31.148089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.148634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.149334] ? __pfx_lock_acquire+0x10/0x10 [ 31.149865] ? __pfx_mmap_region+0x10/0x10 [ 31.150382] ? security_mmap_addr+0x7d/0xa0 [ 31.150895] ? get_unmapped_area+0x1f5/0x3f0 [ 31.151430] do_mmap+0x854/0xf00 [ 31.151858] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.152367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.152919] ksys_mmap_pgoff+0x3af/0x500 [ 31.153413] do_syscall_64+0x3f/0x90 [ 31.153881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154509] RIP: 0033:0x7f33db8cbd82 [ 31.154956] 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 [ 31.157054] RSP: 002b:00007fff1a68a958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.157928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33db8cbd82 [ 31.158760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33dad05000 [ 31.159614] RBP: 00007f33dad05000 R08: 0000000000000009 R09: 0000000000001000 [ 31.160480] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cbf160d90 [ 31.161315] R13: 00007fff1a68a970 R14: 00007fff1a68a9a0 R15: 00007fff1a68ad00 [ 31.162142] [ 31.162426] [ 31.162639] Allocated by task 215: [ 31.163060] kasan_save_stack+0x22/0x50 [ 31.163555] kasan_set_track+0x25/0x30 [ 31.164037] __kasan_slab_alloc+0x59/0x70 [ 31.164559] kmem_cache_alloc+0x16b/0x370 [ 31.165058] vm_area_dup+0x20/0x160 [ 31.165498] __split_vma+0x170/0x950 [ 31.165953] split_vma+0xc6/0x110 [ 31.166383] mprotect_fixup+0x8d2/0xb30 [ 31.166867] do_mprotect_pkey+0x87e/0xd40 [ 31.167380] __x64_sys_mprotect+0x78/0xc0 [ 31.167892] do_syscall_64+0x3f/0x90 [ 31.168370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168995] [ 31.169203] Freed by task 215: [ 31.169603] kasan_save_stack+0x22/0x50 [ 31.170106] kasan_set_track+0x25/0x30 [ 31.170604] kasan_save_free_info+0x2b/0x50 [ 31.171142] __kasan_slab_free+0x10a/0x190 [ 31.171680] kmem_cache_free+0x10d/0x4d0 [ 31.172182] rcu_core+0x8c8/0x2860 [ 31.172636] __do_softirq+0x1b7/0x7d4 [ 31.173110] [ 31.173319] Last potentially related work creation: [ 31.173886] kasan_save_stack+0x22/0x50 [ 31.174380] __kasan_record_aux_stack+0x8e/0xa0 [ 31.174934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.175560] remove_vma+0x139/0x170 [ 31.175999] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.176553] do_vmi_munmap+0x1f1/0x2b0 [ 31.177056] __vm_munmap+0x138/0x3a0 [ 31.177648] __x64_sys_munmap+0x59/0x80 [ 31.178148] do_syscall_64+0x3f/0x90 [ 31.178628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.179276] [ 31.179489] The buggy address belongs to the object at ffff88800fe5a828 [ 31.179489] which belongs to the cache vm_area_struct of size 168 [ 31.180992] The buggy address is located 88 bytes inside of [ 31.180992] freed 168-byte region [ffff88800fe5a828, ffff88800fe5a8d0) [ 31.182402] [ 31.182616] The buggy address belongs to the physical page: [ 31.183287] page:00000000d7cc5613 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe5a [ 31.184384] memcg:ffff88800fe88701 [ 31.184810] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.185459] page_type: 0xffffffff() [ 31.185910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.186826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe88701 [ 31.187732] page dumped because: kasan: bad access detected [ 31.188412] [ 31.188631] Memory state around the buggy address: [ 31.189223] ffff88800fe5a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.190084] ffff88800fe5a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.190947] >ffff88800fe5a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.191799] ^ [ 31.192210] ffff88800fe5a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.193075] ffff88800fe5a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.193940] ================================================================== [ 31.194854] Disabling lock debugging due to kernel taint [ 33.133357] BUG: Bad rss-counter state mm:000000003d7f28da type:MM_FILEPAGES val:33 [ 33.134830] BUG: Bad rss-counter state mm:000000003d7f28da type:MM_ANONPAGES val:22 [ 33.596544] BUG: Bad rss-counter state mm:000000007d78ef70 type:MM_FILEPAGES val:33 [ 33.597705] BUG: Bad rss-counter state mm:000000007d78ef70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60952' (ECDSA) to the list of known hosts. 2023/06/20 11:40:57 fuzzer started 2023/06/20 11:40:57 dialing manager at localhost:36067 2023/06/20 11:40:57 checking machine... 2023/06/20 11:40:57 checking revisions... [ 34.318904] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:40:57 testing simple program... [ 34.370684] cgroup: Unknown subsys name 'net' [ 34.430126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019ff7648 RCX=0000000000000001 RDX=1ffff110033feeca RSI=ffffffff836827e6 RDI=ffff888019ff7650 RBP=0000000000000005 RSP=ffff888019ff7560 R8 =0000000000000001 R9 =ffff888019ff75c0 R10=0000000000038001 R11=000000000008b60d R12=ffff888019ff7648 R13=0000000000000000 R14=ffff888015d251c0 R15=00000000000000a4 RIP=ffffffff813ad4be RFL=00000216 [----AP-] 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 00007f29f929d900 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=00007ffdc10cd000 CR3=000000000d88a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ff79f66f000 CR3=000000000e5d0000 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=f3128b2c9c934eb51e494c5379b129c6 XMM02=ec2efd57dc4c00df000000000011a230 XMM03=f456b86594638895000000000011a300 XMM04=cf26ac55aa3bd84a00000000000ae988 XMM05=25698b955cf8df3f0000000000132828 XMM06=00c3ffa147b8d85700000000001318c8 XMM07=e042d86d42eb936e0000000000121ea0 XMM08=f456b86594638895000000000011a300 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000