syzkaller login: [ 31.130134] BUG: Bad rss-counter state mm:000000000d4dff23 type:MM_FILEPAGES val:33 [ 31.131634] BUG: Bad rss-counter state mm:000000000d4dff23 type:MM_ANONPAGES val:22 [ 31.288929] ================================================================== [ 31.289839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.290785] Read of size 8 at addr ffff888009a784e0 by task sshd/220 [ 31.291728] [ 31.291945] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.292838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.293848] Call Trace: [ 31.294180] [ 31.294463] dump_stack_lvl+0x91/0xf0 [ 31.294960] print_report+0xcc/0x620 [ 31.295467] ? __virt_addr_valid+0x102/0x340 [ 31.296018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.296646] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297277] kasan_report+0xbe/0xf0 [ 31.297756] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298389] vma_interval_tree_remove+0xc75/0xec0 [ 31.298989] vma_prepare+0xc54/0x11a0 [ 31.299466] __split_vma+0x5af/0x950 [ 31.299948] ? __pfx___split_vma+0x10/0x10 [ 31.300479] ? find_held_lock+0x2c/0x110 [ 31.301025] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.301590] ? lock_is_held_type+0x9f/0x120 [ 31.302148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.302760] ? mtree_range_walk+0x632/0x900 [ 31.303316] ? mas_walk+0x5c7/0x7c0 [ 31.303794] do_vmi_munmap+0x1f1/0x2b0 [ 31.304291] mmap_region+0x1f9/0x2660 [ 31.304793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.305304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.306031] ? __pfx_lock_acquire+0x10/0x10 [ 31.306559] ? __pfx_mmap_region+0x10/0x10 [ 31.307098] ? security_mmap_addr+0x7d/0xa0 [ 31.307650] ? get_unmapped_area+0x1f5/0x3f0 [ 31.308221] do_mmap+0x854/0xf00 [ 31.308676] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.309173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.309751] ksys_mmap_pgoff+0x3af/0x500 [ 31.310261] do_syscall_64+0x3f/0x90 [ 31.310741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311404] RIP: 0033:0x7f930004cd82 [ 31.311856] 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 [ 31.314060] RSP: 002b:00007ffce3ea8e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.314971] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f930004cd82 [ 31.315816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92ff486000 [ 31.316671] RBP: 00007f92ff486000 R08: 0000000000000009 R09: 0000000000001000 [ 31.317518] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb629dd980 [ 31.318408] R13: 00007ffce3ea8e50 R14: 00007ffce3ea8e80 R15: 00007ffce3ea91e0 [ 31.319264] [ 31.319555] [ 31.319775] Allocated by task 213: [ 31.320212] kasan_save_stack+0x22/0x50 [ 31.320760] kasan_set_track+0x25/0x30 [ 31.321262] __kasan_slab_alloc+0x59/0x70 [ 31.321786] kmem_cache_alloc+0x16b/0x370 [ 31.322301] vm_area_dup+0x20/0x160 [ 31.322763] __split_vma+0x170/0x950 [ 31.323257] split_vma+0xc6/0x110 [ 31.323709] mprotect_fixup+0x8d2/0xb30 [ 31.324219] do_mprotect_pkey+0x87e/0xd40 [ 31.324747] __x64_sys_mprotect+0x78/0xc0 [ 31.325273] do_syscall_64+0x3f/0x90 [ 31.325759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326408] [ 31.326623] Freed by task 213: [ 31.327025] kasan_save_stack+0x22/0x50 [ 31.327535] kasan_set_track+0x25/0x30 [ 31.328041] kasan_save_free_info+0x2b/0x50 [ 31.328628] __kasan_slab_free+0x10a/0x190 [ 31.329164] kmem_cache_free+0x10d/0x4d0 [ 31.329675] rcu_core+0x8c8/0x2860 [ 31.330122] __do_softirq+0x1b7/0x7d4 [ 31.330604] [ 31.330818] Last potentially related work creation: [ 31.331401] kasan_save_stack+0x22/0x50 [ 31.331901] __kasan_record_aux_stack+0x8e/0xa0 [ 31.332577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.333236] remove_vma+0x139/0x170 [ 31.333712] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.334289] do_vmi_munmap+0x1f1/0x2b0 [ 31.334783] __vm_munmap+0x138/0x3a0 [ 31.335257] __x64_sys_munmap+0x59/0x80 [ 31.335763] do_syscall_64+0x3f/0x90 [ 31.336244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336898] [ 31.337117] The buggy address belongs to the object at ffff888009a78488 [ 31.337117] which belongs to the cache vm_area_struct of size 168 [ 31.338603] The buggy address is located 88 bytes inside of [ 31.338603] freed 168-byte region [ffff888009a78488, ffff888009a78530) [ 31.340022] [ 31.340246] The buggy address belongs to the physical page: [ 31.340926] page:000000004c57ba10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a78 [ 31.342008] memcg:ffff88800c5b4401 [ 31.342441] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.343091] page_type: 0xffffffff() [ 31.343542] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.344484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5b4401 [ 31.345444] page dumped because: kasan: bad access detected [ 31.346120] [ 31.346337] Memory state around the buggy address: [ 31.346916] ffff888009a78380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.347780] ffff888009a78400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.348661] >ffff888009a78480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.349513] ^ [ 31.350276] ffff888009a78500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.351133] ffff888009a78580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351974] ================================================================== [ 31.352914] Disabling lock debugging due to kernel taint [ 33.408788] BUG: Bad rss-counter state mm:000000005df2518f type:MM_FILEPAGES val:33 [ 33.409992] BUG: Bad rss-counter state mm:000000005df2518f type:MM_ANONPAGES val:22 [ 33.895739] BUG: Bad rss-counter state mm:00000000f6cf41bf type:MM_FILEPAGES val:33 [ 33.896918] BUG: Bad rss-counter state mm:00000000f6cf41bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1779' (ECDSA) to the list of known hosts. 2023/06/20 18:50:29 fuzzer started 2023/06/20 18:50:29 dialing manager at localhost:36067 2023/06/20 18:50:29 checking machine... 2023/06/20 18:50:29 checking revisions... [ 34.535191] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:50:29 testing simple program... [ 34.596385] cgroup: Unknown subsys name 'net' [ 34.635701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:29 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85dbd818 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff888015a378f8 R8 =ffffffff860d8256 R9 =ffff888015a379f0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd838 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007f498dcb4900 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=00007f498e26c0b0 CR3=000000000d6a8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81279d58 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=dffffc0000000000 RSP=ffff888008e07e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-PC] 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=00007f9cacabc730 CR3=000000000cbdc000 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=82ddd0443cc2b1a6644c31d30b834f30 XMM02=ec2efd57dc4c00df000000000011a398 XMM03=53312444d0e87353000000000011a468 XMM04=67ba2d2940e0cc2400000000000ae988 XMM05=e8538d1e81b7854000000000001325a8 XMM06=4fda316b135da52b0000000000131648 XMM07=e042d86d42eb936e0000000000121c00 XMM08=53312444d0e87353000000000011a468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000