syzkaller login: [ 30.663207] BUG: Bad rss-counter state mm:0000000038a71444 type:MM_FILEPAGES val:33 [ 30.664671] BUG: Bad rss-counter state mm:0000000038a71444 type:MM_ANONPAGES val:22 [ 30.821740] ================================================================== [ 30.822798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.823901] Read of size 8 at addr ffff88801a3c6df0 by task sshd/221 [ 30.824994] [ 30.825248] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827132] Call Trace: [ 30.827460] [ 30.827750] dump_stack_lvl+0x91/0xf0 [ 30.828242] print_report+0xcc/0x620 [ 30.828735] ? __virt_addr_valid+0x102/0x340 [ 30.829297] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829919] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830532] kasan_report+0xbe/0xf0 [ 30.831007] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831618] vma_interval_tree_remove+0xc75/0xec0 [ 30.832221] vma_prepare+0xc54/0x11a0 [ 30.832707] __split_vma+0x5af/0x950 [ 30.833179] ? __pfx___split_vma+0x10/0x10 [ 30.833743] ? find_held_lock+0x2c/0x110 [ 30.834267] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.834835] ? lock_is_held_type+0x9f/0x120 [ 30.835372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.835975] ? mtree_range_walk+0x632/0x900 [ 30.836535] ? mas_walk+0x5c7/0x7c0 [ 30.837009] do_vmi_munmap+0x1f1/0x2b0 [ 30.837505] mmap_region+0x1f9/0x2660 [ 30.837986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.838490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.839200] ? __pfx_lock_acquire+0x10/0x10 [ 30.839729] ? __pfx_mmap_region+0x10/0x10 [ 30.840262] ? security_mmap_addr+0x7d/0xa0 [ 30.840792] ? get_unmapped_area+0x1f5/0x3f0 [ 30.841345] do_mmap+0x854/0xf00 [ 30.841794] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.842286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.842849] ksys_mmap_pgoff+0x3af/0x500 [ 30.843355] do_syscall_64+0x3f/0x90 [ 30.843832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.844479] RIP: 0033:0x7f16aadfcd82 [ 30.844934] 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 [ 30.847058] RSP: 002b:00007fff899af1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.847965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16aadfcd82 [ 30.848805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16aa236000 [ 30.849672] RBP: 00007f16aa236000 R08: 0000000000000009 R09: 0000000000001000 [ 30.850510] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585f77a4d90 [ 30.851344] R13: 00007fff899af1c0 R14: 00007fff899af1f0 R15: 00007fff899af550 [ 30.852185] [ 30.852477] [ 30.852688] Allocated by task 214: [ 30.853111] kasan_save_stack+0x22/0x50 [ 30.853629] kasan_set_track+0x25/0x30 [ 30.854123] __kasan_slab_alloc+0x59/0x70 [ 30.854645] kmem_cache_alloc+0x16b/0x370 [ 30.855155] vm_area_dup+0x20/0x160 [ 30.855603] __split_vma+0x170/0x950 [ 30.856066] split_vma+0xc6/0x110 [ 30.856499] mprotect_fixup+0x8d2/0xb30 [ 30.856997] do_mprotect_pkey+0x87e/0xd40 [ 30.857529] __x64_sys_mprotect+0x78/0xc0 [ 30.858052] do_syscall_64+0x3f/0x90 [ 30.858525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859164] [ 30.859383] Freed by task 214: [ 30.859773] kasan_save_stack+0x22/0x50 [ 30.860271] kasan_set_track+0x25/0x30 [ 30.860763] kasan_save_free_info+0x2b/0x50 [ 30.861288] __kasan_slab_free+0x10a/0x190 [ 30.861836] kmem_cache_free+0x10d/0x4d0 [ 30.862347] rcu_core+0x8c8/0x2860 [ 30.862791] __do_softirq+0x1b7/0x7d4 [ 30.863262] [ 30.863477] Last potentially related work creation: [ 30.864062] kasan_save_stack+0x22/0x50 [ 30.864559] __kasan_record_aux_stack+0x8e/0xa0 [ 30.865146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.865855] remove_vma+0x139/0x170 [ 30.866307] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.866855] do_vmi_munmap+0x1f1/0x2b0 [ 30.867334] __vm_munmap+0x138/0x3a0 [ 30.867799] __x64_sys_munmap+0x59/0x80 [ 30.868295] do_syscall_64+0x3f/0x90 [ 30.868765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869405] [ 30.869645] The buggy address belongs to the object at ffff88801a3c6d98 [ 30.869645] which belongs to the cache vm_area_struct of size 168 [ 30.871113] The buggy address is located 88 bytes inside of [ 30.871113] freed 168-byte region [ffff88801a3c6d98, ffff88801a3c6e40) [ 30.872506] [ 30.872720] The buggy address belongs to the physical page: [ 30.873374] page:00000000ce864b7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3c6 [ 30.874503] memcg:ffff88801a3cb201 [ 30.874946] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.875611] page_type: 0xffffffff() [ 30.876073] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.877031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3cb201 [ 30.877980] page dumped because: kasan: bad access detected [ 30.878663] [ 30.878885] Memory state around the buggy address: [ 30.879495] ffff88801a3c6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.880386] ffff88801a3c6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.881273] >ffff88801a3c6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.882173] ^ [ 30.883000] ffff88801a3c6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.883887] ffff88801a3c6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.884772] ================================================================== [ 30.885719] Disabling lock debugging due to kernel taint [ 32.938366] BUG: Bad rss-counter state mm:00000000a9fcf31b type:MM_FILEPAGES val:33 [ 32.939577] BUG: Bad rss-counter state mm:00000000a9fcf31b type:MM_ANONPAGES val:22 [ 33.535799] BUG: Bad rss-counter state mm:00000000a421b949 type:MM_FILEPAGES val:33 [ 33.536977] BUG: Bad rss-counter state mm:00000000a421b949 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14729' (ECDSA) to the list of known hosts. 2023/06/21 00:35:27 fuzzer started 2023/06/21 00:35:27 dialing manager at localhost:36067 2023/06/21 00:35:27 checking machine... 2023/06/21 00:35:27 checking revisions... [ 34.195705] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:35:27 testing simple program... [ 34.238189] cgroup: Unknown subsys name 'net' [ 34.289773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8171110a RDX=ffff888016b20000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f32fd90 RSP=ffff88800f32fbf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea000056e8c0 R13=ffff88801bfeebc8 R14=ffff88800f32fdb8 R15=ffffea000056e8f4 RIP=ffffffff814c027c RFL=00000246 [---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 00007f48da651900 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=000055889d228744 CR3=00000000165ca000 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=0000000000000000000055889c491060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff85652d08 RCX=0000000080000000 RDX=1ffffffff0aca5a1 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d9b7408 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000246 [---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 00007f1b9d1c5900 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=00007f1b9c616fc0 CR3=000000000c55a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=38946dc0ddedf0f100000000000ae988 XMM05=13ad6b0251f0f21c0000000000132e10 XMM06=c291bd5c70af25b90000000000131c00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000