syzkaller login: [ 63.648881] BUG: Bad rss-counter state mm:000000007553d226 type:MM_FILEPAGES val:33 [ 63.650362] BUG: Bad rss-counter state mm:000000007553d226 type:MM_ANONPAGES val:22 [ 63.803730] ================================================================== [ 63.804686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.805685] Read of size 8 at addr ffff8880146cb228 by task sshd/228 [ 63.806697] [ 63.806947] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.807880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.808989] Call Trace: [ 63.809338] [ 63.809648] dump_stack_lvl+0x91/0xf0 [ 63.810167] print_report+0xcc/0x620 [ 63.810681] ? __virt_addr_valid+0x102/0x340 [ 63.811264] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.811918] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.812575] kasan_report+0xbe/0xf0 [ 63.813115] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.813810] vma_interval_tree_remove+0xc75/0xec0 [ 63.814465] vma_prepare+0xc54/0x11a0 [ 63.814983] __split_vma+0x5af/0x950 [ 63.815484] ? __pfx___split_vma+0x10/0x10 [ 63.816052] ? find_held_lock+0x2c/0x110 [ 63.816614] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.817234] ? lock_is_held_type+0x9f/0x120 [ 63.817821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.818470] ? mtree_range_walk+0x632/0x900 [ 63.819066] ? mas_walk+0x5c7/0x7c0 [ 63.819579] do_vmi_munmap+0x1f1/0x2b0 [ 63.820104] mmap_region+0x1f9/0x2660 [ 63.820635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.821209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.821994] ? __pfx_lock_acquire+0x10/0x10 [ 63.822566] ? __pfx_mmap_region+0x10/0x10 [ 63.823135] ? security_mmap_addr+0x7d/0xa0 [ 63.823698] ? get_unmapped_area+0x1f5/0x3f0 [ 63.824298] do_mmap+0x854/0xf00 [ 63.824775] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.825309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.825957] ksys_mmap_pgoff+0x3af/0x500 [ 63.826509] do_syscall_64+0x3f/0x90 [ 63.827036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.827737] RIP: 0033:0x7f95d1e4ad82 [ 63.828241] 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 [ 63.830593] RSP: 002b:00007ffe6cf6d728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.831590] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95d1e4ad82 [ 63.832524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95d1284000 [ 63.833465] RBP: 00007f95d1284000 R08: 0000000000000009 R09: 0000000000001000 [ 63.834402] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a65714ff70 [ 63.835344] R13: 00007ffe6cf6d740 R14: 00007ffe6cf6d770 R15: 00007ffe6cf6dad0 [ 63.836292] [ 63.836617] [ 63.836860] Allocated by task 221: [ 63.837332] kasan_save_stack+0x22/0x50 [ 63.837888] kasan_set_track+0x25/0x30 [ 63.838436] __kasan_slab_alloc+0x59/0x70 [ 63.839017] kmem_cache_alloc+0x16b/0x370 [ 63.839589] vm_area_dup+0x20/0x160 [ 63.840093] __split_vma+0x170/0x950 [ 63.840609] split_vma+0xc6/0x110 [ 63.841096] mprotect_fixup+0x8d2/0xb30 [ 63.841654] do_mprotect_pkey+0x87e/0xd40 [ 63.842232] __x64_sys_mprotect+0x78/0xc0 [ 63.842807] do_syscall_64+0x3f/0x90 [ 63.843329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.844040] [ 63.844280] Freed by task 221: [ 63.844716] kasan_save_stack+0x22/0x50 [ 63.845290] kasan_set_track+0x25/0x30 [ 63.845837] kasan_save_free_info+0x2b/0x50 [ 63.846423] __kasan_slab_free+0x10a/0x190 [ 63.847010] kmem_cache_free+0x10d/0x4d0 [ 63.847574] rcu_core+0x8c8/0x2860 [ 63.848120] __do_softirq+0x1b7/0x7d4 [ 63.848647] [ 63.848903] Last potentially related work creation: [ 63.849578] kasan_save_stack+0x22/0x50 [ 63.850136] __kasan_record_aux_stack+0x8e/0xa0 [ 63.850770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.851481] remove_vma+0x139/0x170 [ 63.851984] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.852599] do_vmi_munmap+0x1f1/0x2b0 [ 63.853140] __vm_munmap+0x138/0x3a0 [ 63.853658] __x64_sys_munmap+0x59/0x80 [ 63.854207] do_syscall_64+0x3f/0x90 [ 63.854729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.855441] [ 63.855678] The buggy address belongs to the object at ffff8880146cb1d0 [ 63.855678] which belongs to the cache vm_area_struct of size 168 [ 63.857319] The buggy address is located 88 bytes inside of [ 63.857319] freed 168-byte region [ffff8880146cb1d0, ffff8880146cb278) [ 63.858877] [ 63.859113] The buggy address belongs to the physical page: [ 63.859841] page:00000000cad34e9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146cb [ 63.861043] memcg:ffff88800c519f01 [ 63.861521] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.862230] page_type: 0xffffffff() [ 63.862729] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.863745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c519f01 [ 63.864764] page dumped because: kasan: bad access detected [ 63.865491] [ 63.865732] Memory state around the buggy address: [ 63.866374] ffff8880146cb100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.867319] ffff8880146cb180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 63.868271] >ffff8880146cb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.869216] ^ [ 63.869831] ffff8880146cb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.870771] ffff8880146cb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.871710] ================================================================== [ 63.872845] Disabling lock debugging due to kernel taint [ 65.594393] BUG: Bad rss-counter state mm:00000000f61f7a69 type:MM_FILEPAGES val:33 [ 65.595112] BUG: Bad rss-counter state mm:00000000f61f7a69 type:MM_ANONPAGES val:22 [ 66.104933] BUG: Bad rss-counter state mm:00000000d8d0a0ad type:MM_FILEPAGES val:33 [ 66.106065] BUG: Bad rss-counter state mm:00000000d8d0a0ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7273' (ECDSA) to the list of known hosts. 2023/06/19 13:06:15 fuzzer started 2023/06/19 13:06:16 dialing manager at localhost:44161 2023/06/19 13:06:16 checking machine... 2023/06/19 13:06:16 checking revisions... [ 66.851333] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:06:16 testing simple program... [ 66.914472] cgroup: Unknown subsys name 'net' [ 66.961948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:13 Registers: info registers vcpu 0 RAX=0000000000020dae RBX=0000000000000001 RCX=ffffffff8180c8d9 RDX=0000000000020db4 RSI=00000000000080c8 RDI=000000000006290a RBP=ffff8880147af500 RSP=ffff8880147af438 R8 =ffffffff861375e0 R9 =ffff8880147af4e8 R10=0000000000038001 R11=0000000000020dae R12=ffff8880147af508 R13=ffff8880147af4f0 R14=ffff8880147af4e9 R15=ffff8880147af4a8 RIP=ffffffff81130853 RFL=00000283 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd86a38900 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=00007fcd85e6d250 CR3=000000000d554000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=007405df9bd69fc600000000000ae988 XMM05=ad6d08639e112a2000000000001357f8 XMM06=b00eac2517f7a7ca0000000000134598 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800db97888 RCX=0000000000000001 RDX=1ffff11001b72f1c RSI=ffff88800db97e58 RDI=ffffffff8363dd1c RBP=ffff88800db978e0 RSP=ffff88800db97870 R8 =0000000000000001 R9 =ffff88800db978c8 R10=0000000000038001 R11=000000000008a6be R12=ffff88800db97950 R13=0000000000000000 R14=ffff888016ed8000 R15=0000000000092cc0 RIP=ffffffff81130399 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 00007f7d888d1900 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=00007ffc3f018000 CR3=00000000181fe000 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=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