syzkaller login: [ 30.734719] sshd (214) used greatest stack depth: 24128 bytes left [ 30.735574] BUG: Bad rss-counter state mm:000000006da4cbcc type:MM_FILEPAGES val:33 [ 30.736555] BUG: Bad rss-counter state mm:000000006da4cbcc type:MM_ANONPAGES val:22 [ 30.909236] ================================================================== [ 30.910329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.911367] Read of size 8 at addr ffff88800d9ad228 by task sshd/221 [ 30.912247] [ 30.912468] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.913432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.914494] Call Trace: [ 30.914836] [ 30.915120] dump_stack_lvl+0x91/0xf0 [ 30.915615] print_report+0xcc/0x620 [ 30.916104] ? __virt_addr_valid+0x102/0x340 [ 30.916663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917291] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917914] kasan_report+0xbe/0xf0 [ 30.918412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919048] vma_interval_tree_remove+0xc75/0xec0 [ 30.919660] vma_prepare+0xc54/0x11a0 [ 30.920145] __split_vma+0x5af/0x950 [ 30.920636] ? __pfx___split_vma+0x10/0x10 [ 30.921172] ? find_held_lock+0x2c/0x110 [ 30.921704] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.922277] ? lock_is_held_type+0x9f/0x120 [ 30.922845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.923447] ? mtree_range_walk+0x632/0x900 [ 30.924038] ? mas_walk+0x5c7/0x7c0 [ 30.924567] do_vmi_munmap+0x1f1/0x2b0 [ 30.925107] mmap_region+0x1f9/0x2660 [ 30.925642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.926205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.926999] ? __pfx_lock_acquire+0x10/0x10 [ 30.927592] ? __pfx_mmap_region+0x10/0x10 [ 30.928179] ? security_mmap_addr+0x7d/0xa0 [ 30.928788] ? get_unmapped_area+0x1f5/0x3f0 [ 30.929400] do_mmap+0x854/0xf00 [ 30.929888] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.930446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.931065] ksys_mmap_pgoff+0x3af/0x500 [ 30.931632] do_syscall_64+0x3f/0x90 [ 30.932165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.932882] RIP: 0033:0x7f2919a14d82 [ 30.933387] 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 [ 30.935758] RSP: 002b:00007fffac894368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.936763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2919a14d82 [ 30.937697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2918e4e000 [ 30.938649] RBP: 00007f2918e4e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.939589] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e34f76eec0 [ 30.940538] R13: 00007fffac894380 R14: 00007fffac8943b0 R15: 00007fffac894710 [ 30.941489] [ 30.941814] [ 30.942047] Allocated by task 214: [ 30.942542] kasan_save_stack+0x22/0x50 [ 30.943094] kasan_set_track+0x25/0x30 [ 30.943639] __kasan_slab_alloc+0x59/0x70 [ 30.944217] kmem_cache_alloc+0x16b/0x370 [ 30.944783] vm_area_dup+0x20/0x160 [ 30.945286] __split_vma+0x170/0x950 [ 30.945799] split_vma+0xc6/0x110 [ 30.946281] mprotect_fixup+0x8d2/0xb30 [ 30.946845] do_mprotect_pkey+0x87e/0xd40 [ 30.947422] __x64_sys_mprotect+0x78/0xc0 [ 30.947992] do_syscall_64+0x3f/0x90 [ 30.948524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949237] [ 30.949478] Freed by task 214: [ 30.949918] kasan_save_stack+0x22/0x50 [ 30.950481] kasan_set_track+0x25/0x30 [ 30.951031] kasan_save_free_info+0x2b/0x50 [ 30.951626] __kasan_slab_free+0x10a/0x190 [ 30.952211] kmem_cache_free+0x10d/0x4d0 [ 30.952778] rcu_core+0x8c8/0x2860 [ 30.953276] __do_softirq+0x1b7/0x7d4 [ 30.953812] [ 30.954103] Last potentially related work creation: [ 30.954757] kasan_save_stack+0x22/0x50 [ 30.955306] __kasan_record_aux_stack+0x8e/0xa0 [ 30.955958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.956652] remove_vma+0x139/0x170 [ 30.957149] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.957746] do_vmi_munmap+0x1f1/0x2b0 [ 30.958266] __vm_munmap+0x138/0x3a0 [ 30.958779] __x64_sys_munmap+0x59/0x80 [ 30.959315] do_syscall_64+0x3f/0x90 [ 30.959821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960525] [ 30.960758] The buggy address belongs to the object at ffff88800d9ad1d0 [ 30.960758] which belongs to the cache vm_area_struct of size 168 [ 30.962345] The buggy address is located 88 bytes inside of [ 30.962345] freed 168-byte region [ffff88800d9ad1d0, ffff88800d9ad278) [ 30.963852] [ 30.964088] The buggy address belongs to the physical page: [ 30.964797] page:0000000069a1e963 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ad [ 30.965981] memcg:ffff88800eda7701 [ 30.966471] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.967188] page_type: 0xffffffff() [ 30.967692] raw: 0100000000000200 ffff8880087a0c80 ffffea0000399740 dead000000000004 [ 30.968715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eda7701 [ 30.969723] page dumped because: kasan: bad access detected [ 30.970476] [ 30.970713] Memory state around the buggy address: [ 30.971353] ffff88800d9ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.972305] ffff88800d9ad180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.973261] >ffff88800d9ad200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.974202] ^ [ 30.974826] ffff88800d9ad280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.975774] ffff88800d9ad300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.976718] ================================================================== [ 30.977914] Disabling lock debugging due to kernel taint [ 33.603671] BUG: Bad rss-counter state mm:00000000b58e1d7a type:MM_FILEPAGES val:33 [ 33.604979] BUG: Bad rss-counter state mm:00000000b58e1d7a type:MM_ANONPAGES val:22 [ 34.061911] BUG: Bad rss-counter state mm:00000000cee37a41 type:MM_FILEPAGES val:33 [ 34.062813] BUG: Bad rss-counter state mm:00000000cee37a41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30639' (ECDSA) to the list of known hosts. 2023/06/20 15:23:21 fuzzer started 2023/06/20 15:23:21 dialing manager at localhost:36067 2023/06/20 15:23:21 checking machine... 2023/06/20 15:23:21 checking revisions... [ 34.776860] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:23:21 testing simple program... [ 34.827869] cgroup: Unknown subsys name 'net' [ 34.867739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:21 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=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcea799cb8 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=00007fd9ba1a0510000055e1244ff790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001aceb43 RBX=ffff88800d6759e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d675a18 RBP=ffff888019c2e2f0 RSP=ffff88800bf27d18 R8 =0000000000000001 R9 =ffffed10017e4f97 R10=0000000000000003 R11=00000000000b6d7d R12=dffffc0000000000 R13=ffff888019c2d028 R14=ffffffff813782f8 R15=ffff888018838000 RIP=ffffffff818464e2 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5ae6f00900 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=00007f5ae74b5650 CR3=000000001981c000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=752f3d4854415009485441505f564e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000