syzkaller login: [ 31.587832] BUG: Bad rss-counter state mm:0000000052172638 type:MM_FILEPAGES val:33 [ 31.588974] BUG: Bad rss-counter state mm:0000000052172638 type:MM_ANONPAGES val:22 [ 31.717413] ================================================================== [ 31.718514] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.719624] Read of size 8 at addr ffff88800feb7968 by task sshd/220 [ 31.720654] [ 31.720940] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.721963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.722856] Call Trace: [ 31.723099] [ 31.723314] dump_stack_lvl+0x91/0xf0 [ 31.723692] print_report+0xcc/0x620 [ 31.724062] ? __virt_addr_valid+0x102/0x340 [ 31.724486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.725429] kasan_report+0xbe/0xf0 [ 31.725789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.726276] vma_interval_tree_remove+0xc75/0xec0 [ 31.726745] vma_prepare+0xc54/0x11a0 [ 31.727118] __split_vma+0x5af/0x950 [ 31.727481] ? __pfx___split_vma+0x10/0x10 [ 31.727894] ? find_held_lock+0x2c/0x110 [ 31.728296] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.728727] ? lock_is_held_type+0x9f/0x120 [ 31.729136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.729599] ? mtree_range_walk+0x632/0x900 [ 31.730017] ? mas_walk+0x5c7/0x7c0 [ 31.730390] do_vmi_munmap+0x1f1/0x2b0 [ 31.730765] mmap_region+0x1f9/0x2660 [ 31.731142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.731540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.732083] ? __pfx_lock_acquire+0x10/0x10 [ 31.732491] ? __pfx_mmap_region+0x10/0x10 [ 31.732900] ? security_mmap_addr+0x7d/0xa0 [ 31.733308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.733730] do_mmap+0x854/0xf00 [ 31.734079] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.734456] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.734887] ksys_mmap_pgoff+0x3af/0x500 [ 31.735284] do_syscall_64+0x3f/0x90 [ 31.735650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736147] RIP: 0033:0x7fed55db1d82 [ 31.736500] 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 [ 31.738153] RSP: 002b:00007ffc25572888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.738843] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed55db1d82 [ 31.739500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed551eb000 [ 31.740144] RBP: 00007fed551eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.740792] R10: 0000000000000812 R11: 0000000000000206 R12: 000056504e8aaf70 [ 31.741438] R13: 00007ffc255728a0 R14: 00007ffc255728d0 R15: 00007ffc25572c30 [ 31.742105] [ 31.742332] [ 31.742496] Allocated by task 213: [ 31.742824] kasan_save_stack+0x22/0x50 [ 31.743210] kasan_set_track+0x25/0x30 [ 31.743584] __kasan_slab_alloc+0x59/0x70 [ 31.743982] kmem_cache_alloc+0x16b/0x370 [ 31.744374] vm_area_dup+0x20/0x160 [ 31.744718] __split_vma+0x170/0x950 [ 31.745073] split_vma+0xc6/0x110 [ 31.745409] mprotect_fixup+0x8d2/0xb30 [ 31.745796] do_mprotect_pkey+0x87e/0xd40 [ 31.746210] __x64_sys_mprotect+0x78/0xc0 [ 31.746611] do_syscall_64+0x3f/0x90 [ 31.746969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747471] [ 31.747636] Freed by task 213: [ 31.747936] kasan_save_stack+0x22/0x50 [ 31.748318] kasan_set_track+0x25/0x30 [ 31.748694] kasan_save_free_info+0x2b/0x50 [ 31.749102] __kasan_slab_free+0x10a/0x190 [ 31.749508] kmem_cache_free+0x10d/0x4d0 [ 31.749895] rcu_core+0x8c8/0x2860 [ 31.750246] __do_softirq+0x1b7/0x7d4 [ 31.750612] [ 31.750774] Last potentially related work creation: [ 31.751228] kasan_save_stack+0x22/0x50 [ 31.751610] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752541] remove_vma+0x139/0x170 [ 31.752889] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753317] do_vmi_munmap+0x1f1/0x2b0 [ 31.753689] __vm_munmap+0x138/0x3a0 [ 31.754057] __x64_sys_munmap+0x59/0x80 [ 31.754439] do_syscall_64+0x3f/0x90 [ 31.754802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755293] [ 31.755457] The buggy address belongs to the object at ffff88800feb7910 [ 31.755457] which belongs to the cache vm_area_struct of size 168 [ 31.756608] The buggy address is located 88 bytes inside of [ 31.756608] freed 168-byte region [ffff88800feb7910, ffff88800feb79b8) [ 31.757692] [ 31.757858] The buggy address belongs to the physical page: [ 31.758371] page:00000000eba1990b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeb7 [ 31.759216] memcg:ffff888019cc9e01 [ 31.759544] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.760037] page_type: 0xffffffff() [ 31.760382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.761087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cc9e01 [ 31.761794] page dumped because: kasan: bad access detected [ 31.762405] [ 31.762572] Memory state around the buggy address: [ 31.763023] ffff88800feb7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.763680] ffff88800feb7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.764335] >ffff88800feb7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.764999] ^ [ 31.765600] ffff88800feb7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.766265] ffff88800feb7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.766926] ================================================================== [ 31.767652] Disabling lock debugging due to kernel taint [ 33.760510] BUG: Bad rss-counter state mm:000000004a86b419 type:MM_FILEPAGES val:33 [ 33.761811] BUG: Bad rss-counter state mm:000000004a86b419 type:MM_ANONPAGES val:22 [ 34.194857] BUG: Bad rss-counter state mm:00000000c0695bab type:MM_FILEPAGES val:33 [ 34.196034] BUG: Bad rss-counter state mm:00000000c0695bab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12352' (ECDSA) to the list of known hosts. 2023/06/19 11:10:45 fuzzer started 2023/06/19 11:10:45 dialing manager at localhost:44161 2023/06/19 11:10:45 checking machine... 2023/06/19 11:10:45 checking revisions... [ 34.843802] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:10:45 testing simple program... [ 34.893180] cgroup: Unknown subsys name 'net' [ 34.933786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:44 Registers: info registers vcpu 0 RAX=1ffffffff0bc5772 RBX=ffffffff85e2bb94 RCX=ffffffff81b4bda0 RDX=0000000000000000 RSI=ffffffff8617df48 RDI=ffffffff85e2bb7c RBP=ffffffff85e2bb7c RSP=ffff8880165df4e8 R8 =ffffffff8617df48 R9 =ffff8880165df5e0 R10=0000000000038001 R11=000000000002c9ea R12=ffffffff85e2bbb0 R13=ffffffff85e2bb7c R14=ffffffff85e2bb7c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fb45ffe0700 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=0000556cd543de58 CR3=000000001680a000 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=2035343a30313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a30313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81839a7d RSP=ffff88806cf09db8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f1ef88f1900 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=00007f1ef8ea8618 CR3=000000001a374000 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=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