syzkaller login: [ 30.602714] BUG: Bad rss-counter state mm:00000000edafe12c type:MM_FILEPAGES val:33 [ 30.603895] BUG: Bad rss-counter state mm:00000000edafe12c type:MM_ANONPAGES val:22 [ 30.704646] ================================================================== [ 30.705595] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.706561] Read of size 8 at addr ffff888015f8d228 by task sshd/220 [ 30.707447] [ 30.707671] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.708531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.709514] Call Trace: [ 30.709829] [ 30.710110] dump_stack_lvl+0x91/0xf0 [ 30.710630] print_report+0xcc/0x620 [ 30.711117] ? __virt_addr_valid+0x102/0x340 [ 30.711683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712896] kasan_report+0xbe/0xf0 [ 30.713369] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714022] vma_interval_tree_remove+0xc75/0xec0 [ 30.714636] vma_prepare+0xc54/0x11a0 [ 30.715129] __split_vma+0x5af/0x950 [ 30.715611] ? __pfx___split_vma+0x10/0x10 [ 30.716148] ? find_held_lock+0x2c/0x110 [ 30.716690] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.717256] ? lock_is_held_type+0x9f/0x120 [ 30.717821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.718442] ? mtree_range_walk+0x632/0x900 [ 30.719032] ? mas_walk+0x5c7/0x7c0 [ 30.719519] do_vmi_munmap+0x1f1/0x2b0 [ 30.720027] mmap_region+0x1f9/0x2660 [ 30.720518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.721053] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.721790] ? __pfx_lock_acquire+0x10/0x10 [ 30.722334] ? __pfx_mmap_region+0x10/0x10 [ 30.722895] ? security_mmap_addr+0x7d/0xa0 [ 30.723433] ? get_unmapped_area+0x1f5/0x3f0 [ 30.723984] do_mmap+0x854/0xf00 [ 30.724417] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.724909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.725488] ksys_mmap_pgoff+0x3af/0x500 [ 30.726014] do_syscall_64+0x3f/0x90 [ 30.726516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.727173] RIP: 0033:0x7f712514bd82 [ 30.727639] 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 [ 30.729760] RSP: 002b:00007fff44c5a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.730674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f712514bd82 [ 30.731524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7124585000 [ 30.732414] RBP: 00007f7124585000 R08: 0000000000000009 R09: 0000000000001000 [ 30.733285] R10: 0000000000000812 R11: 0000000000000206 R12: 000056085faf3f70 [ 30.734161] R13: 00007fff44c5a110 R14: 00007fff44c5a140 R15: 00007fff44c5a4a0 [ 30.735066] [ 30.735369] [ 30.735588] Allocated by task 213: [ 30.736038] kasan_save_stack+0x22/0x50 [ 30.736559] kasan_set_track+0x25/0x30 [ 30.737080] __kasan_slab_alloc+0x59/0x70 [ 30.737615] kmem_cache_alloc+0x16b/0x370 [ 30.738150] vm_area_dup+0x20/0x160 [ 30.738634] __split_vma+0x170/0x950 [ 30.739118] split_vma+0xc6/0x110 [ 30.739573] mprotect_fixup+0x8d2/0xb30 [ 30.740082] do_mprotect_pkey+0x87e/0xd40 [ 30.740625] __x64_sys_mprotect+0x78/0xc0 [ 30.741155] do_syscall_64+0x3f/0x90 [ 30.741636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742299] [ 30.742527] Freed by task 213: [ 30.742916] kasan_save_stack+0x22/0x50 [ 30.743418] kasan_set_track+0x25/0x30 [ 30.743909] kasan_save_free_info+0x2b/0x50 [ 30.744436] __kasan_slab_free+0x10a/0x190 [ 30.744970] kmem_cache_free+0x10d/0x4d0 [ 30.745488] rcu_core+0x8c8/0x2860 [ 30.745939] __do_softirq+0x1b7/0x7d4 [ 30.746419] [ 30.746652] Last potentially related work creation: [ 30.747259] kasan_save_stack+0x22/0x50 [ 30.747774] __kasan_record_aux_stack+0x8e/0xa0 [ 30.748383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.749056] remove_vma+0x139/0x170 [ 30.749515] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.750077] do_vmi_munmap+0x1f1/0x2b0 [ 30.750586] __vm_munmap+0x138/0x3a0 [ 30.751089] __x64_sys_munmap+0x59/0x80 [ 30.751593] do_syscall_64+0x3f/0x90 [ 30.752073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752729] [ 30.752954] The buggy address belongs to the object at ffff888015f8d1d0 [ 30.752954] which belongs to the cache vm_area_struct of size 168 [ 30.754473] The buggy address is located 88 bytes inside of [ 30.754473] freed 168-byte region [ffff888015f8d1d0, ffff888015f8d278) [ 30.755903] [ 30.756117] The buggy address belongs to the physical page: [ 30.756771] page:000000007f8c8551 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f8d [ 30.757861] memcg:ffff88800da36a01 [ 30.758292] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.758947] page_type: 0xffffffff() [ 30.759403] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.760346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da36a01 [ 30.761285] page dumped because: kasan: bad access detected [ 30.761946] [ 30.762164] Memory state around the buggy address: [ 30.762761] ffff888015f8d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.763623] ffff888015f8d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.764482] >ffff888015f8d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.765341] ^ [ 30.765933] ffff888015f8d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.766849] ffff888015f8d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.767716] ================================================================== [ 30.768843] Disabling lock debugging due to kernel taint [ 32.705546] BUG: Bad rss-counter state mm:000000009e754aee type:MM_FILEPAGES val:33 [ 32.706593] BUG: Bad rss-counter state mm:000000009e754aee type:MM_ANONPAGES val:22 [ 33.129136] BUG: Bad rss-counter state mm:00000000688999cf type:MM_FILEPAGES val:33 [ 33.130702] BUG: Bad rss-counter state mm:00000000688999cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21916' (ECDSA) to the list of known hosts. 2023/06/20 12:26:47 fuzzer started 2023/06/20 12:26:47 dialing manager at localhost:36067 2023/06/20 12:26:47 checking machine... 2023/06/20 12:26:47 checking revisions... [ 33.836281] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:26:47 testing simple program... [ 33.876342] cgroup: Unknown subsys name 'net' [ 33.938626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:26:47 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=ffff888008c04000 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=00007fff02454a58 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=00007f06b01e9510000055608e4a3790 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=dffffc0000000000 RBX=ffffea00006bca80 RCX=ffffffff8176423f RDX=1ffffd40000d7950 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffea00006bca80 RSP=ffff888016537bc0 R8 =0000000000000000 R9 =fffff940000d7950 R10=ffffea00006bca87 R11=0000000000000000 R12=ffff88800c56e910 R13=0000000000000001 R14=ffff888015f68110 R15=ffffea00006bca80 RIP=ffffffff814c03a8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbe0d98b900 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=00007fbe0df3fae8 CR3=000000000e21e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000