syzkaller login: [ 28.886345] BUG: Bad rss-counter state mm:000000002a25b107 type:MM_FILEPAGES val:33 [ 28.887528] BUG: Bad rss-counter state mm:000000002a25b107 type:MM_ANONPAGES val:22 [ 29.040160] ================================================================== [ 29.041231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.042341] Read of size 8 at addr ffff88800f31cc20 by task sshd/220 [ 29.043354] [ 29.043614] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.044481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.045482] Call Trace: [ 29.045812] [ 29.046100] dump_stack_lvl+0x91/0xf0 [ 29.046592] print_report+0xcc/0x620 [ 29.047070] ? __virt_addr_valid+0x102/0x340 [ 29.047618] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.048235] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.048845] kasan_report+0xbe/0xf0 [ 29.049321] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.049960] vma_interval_tree_remove+0xc75/0xec0 [ 29.050563] vma_prepare+0xc54/0x11a0 [ 29.051040] __split_vma+0x5af/0x950 [ 29.051503] ? __pfx___split_vma+0x10/0x10 [ 29.052024] ? find_held_lock+0x2c/0x110 [ 29.052535] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.053091] ? lock_is_held_type+0x9f/0x120 [ 29.053623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.054248] ? mtree_range_walk+0x632/0x900 [ 29.054800] ? mas_walk+0x5c7/0x7c0 [ 29.055269] do_vmi_munmap+0x1f1/0x2b0 [ 29.055763] mmap_region+0x1f9/0x2660 [ 29.056257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.056763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.057470] ? __pfx_lock_acquire+0x10/0x10 [ 29.058000] ? __pfx_mmap_region+0x10/0x10 [ 29.058527] ? security_mmap_addr+0x7d/0xa0 [ 29.059047] ? get_unmapped_area+0x1f5/0x3f0 [ 29.059592] do_mmap+0x854/0xf00 [ 29.060023] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.060515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.061074] ksys_mmap_pgoff+0x3af/0x500 [ 29.061582] do_syscall_64+0x3f/0x90 [ 29.062066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.062708] RIP: 0033:0x7f76b4b06d82 [ 29.063223] 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 [ 29.065659] RSP: 002b:00007fff5afaf7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.066709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76b4b06d82 [ 29.067673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76b3f40000 [ 29.068641] RBP: 00007f76b3f40000 R08: 0000000000000009 R09: 0000000000001000 [ 29.069604] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c43ca64f70 [ 29.070575] R13: 00007fff5afaf7d0 R14: 00007fff5afaf800 R15: 00007fff5afafb60 [ 29.071551] [ 29.071885] [ 29.072132] Allocated by task 212: [ 29.072621] kasan_save_stack+0x22/0x50 [ 29.073200] kasan_set_track+0x25/0x30 [ 29.073766] __kasan_slab_alloc+0x59/0x70 [ 29.074364] kmem_cache_alloc+0x16b/0x370 [ 29.074929] vm_area_dup+0x20/0x160 [ 29.075382] __split_vma+0x170/0x950 [ 29.075845] split_vma+0xc6/0x110 [ 29.076280] mprotect_fixup+0x8d2/0xb30 [ 29.076778] do_mprotect_pkey+0x87e/0xd40 [ 29.077297] __x64_sys_mprotect+0x78/0xc0 [ 29.077831] do_syscall_64+0x3f/0x90 [ 29.078313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.078955] [ 29.079170] Freed by task 203: [ 29.079560] kasan_save_stack+0x22/0x50 [ 29.080059] kasan_set_track+0x25/0x30 [ 29.080557] kasan_save_free_info+0x2b/0x50 [ 29.081088] __kasan_slab_free+0x10a/0x190 [ 29.081621] kmem_cache_free+0x10d/0x4d0 [ 29.082139] rcu_core+0x8c8/0x2860 [ 29.082582] __do_softirq+0x1b7/0x7d4 [ 29.083066] [ 29.083288] Last potentially related work creation: [ 29.083866] kasan_save_stack+0x22/0x50 [ 29.084373] __kasan_record_aux_stack+0x8e/0xa0 [ 29.084947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.085589] remove_vma+0x139/0x170 [ 29.086053] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.086612] do_vmi_munmap+0x1f1/0x2b0 [ 29.087096] __vm_munmap+0x138/0x3a0 [ 29.087568] __x64_sys_munmap+0x59/0x80 [ 29.088064] do_syscall_64+0x3f/0x90 [ 29.088533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.089173] [ 29.089393] The buggy address belongs to the object at ffff88800f31cbc8 [ 29.089393] which belongs to the cache vm_area_struct of size 168 [ 29.090890] The buggy address is located 88 bytes inside of [ 29.090890] freed 168-byte region [ffff88800f31cbc8, ffff88800f31cc70) [ 29.092297] [ 29.092512] The buggy address belongs to the physical page: [ 29.093174] page:000000001f44ef9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf31c [ 29.094276] memcg:ffff88800c42b101 [ 29.094705] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.095346] page_type: 0xffffffff() [ 29.095793] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.096710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c42b101 [ 29.097613] page dumped because: kasan: bad access detected [ 29.098281] [ 29.098495] Memory state around the buggy address: [ 29.099082] ffff88800f31cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.099937] ffff88800f31cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.100790] >ffff88800f31cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.101636] ^ [ 29.102167] ffff88800f31cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.103016] ffff88800f31cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.103862] ================================================================== [ 29.104914] Disabling lock debugging due to kernel taint [ 31.826830] BUG: Bad rss-counter state mm:0000000033d3f7a9 type:MM_FILEPAGES val:33 [ 31.828107] BUG: Bad rss-counter state mm:0000000033d3f7a9 type:MM_ANONPAGES val:22 [ 32.324502] BUG: Bad rss-counter state mm:00000000c5e7aa9e type:MM_FILEPAGES val:33 [ 32.325554] BUG: Bad rss-counter state mm:00000000c5e7aa9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44931' (ECDSA) to the list of known hosts. 2023/06/19 15:56:45 fuzzer started 2023/06/19 15:56:45 dialing manager at localhost:44161 2023/06/19 15:56:45 checking machine... 2023/06/19 15:56:45 checking revisions... [ 33.079962] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:56:45 testing simple program... [ 33.124417] cgroup: Unknown subsys name 'net' [ 33.251175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f19ee285000 RCX=ffffffff81007b82 RDX=00007f19ee285000 RSI=ffffffffff600000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888018d07878 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f19ee285000 R11=00000000000b6996 R12=ffff888018d079c0 R13=0000000000000000 R14=ffff888015aab680 R15=0000000000092cc0 RIP=ffffffff814c01d0 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 00007f19edd92900 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=00007f5c7634a290 CR3=000000000c6ae000 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=ffffffff8613773b RBX=0000000000000001 RCX=ffffffff86137736 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016f7f680 RSP=ffff888016f7f5b8 R8 =ffffffff8613773a R9 =ffff888016f7f668 R10=0000000000038001 R11=0000000000020de7 R12=ffff888016f7f688 R13=ffff888016f7f670 R14=ffff888016f7f9b0 R15=ffff888016f7f628 RIP=ffffffff81131134 RFL=00000293 [--S-A-C] 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 00007f8147fff700 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=00007f19ee347650 CR3=000000000e236000 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=2034343a36353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000