syzkaller login: [ 35.194050] BUG: Bad rss-counter state mm:00000000a41155e0 type:MM_FILEPAGES val:33 [ 35.195449] BUG: Bad rss-counter state mm:00000000a41155e0 type:MM_ANONPAGES val:22 [ 35.335538] ================================================================== [ 35.336463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.337362] Read of size 8 at addr ffff88801663fa50 by task sshd/221 [ 35.338213] [ 35.338471] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.339321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.340254] Call Trace: [ 35.340584] [ 35.340865] dump_stack_lvl+0x91/0xf0 [ 35.341335] print_report+0xcc/0x620 [ 35.341805] ? __virt_addr_valid+0x102/0x340 [ 35.342343] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.342940] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.343568] kasan_report+0xbe/0xf0 [ 35.344034] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.344645] vma_interval_tree_remove+0xc75/0xec0 [ 35.345229] vma_prepare+0xc54/0x11a0 [ 35.345691] __split_vma+0x5af/0x950 [ 35.346151] ? __pfx___split_vma+0x10/0x10 [ 35.346661] ? find_held_lock+0x2c/0x110 [ 35.347169] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.347715] ? lock_is_held_type+0x9f/0x120 [ 35.348233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.348817] ? mtree_range_walk+0x632/0x900 [ 35.349347] ? mas_walk+0x5c7/0x7c0 [ 35.349808] do_vmi_munmap+0x1f1/0x2b0 [ 35.350283] mmap_region+0x1f9/0x2660 [ 35.350753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.351253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.351939] ? __pfx_lock_acquire+0x10/0x10 [ 35.352453] ? __pfx_mmap_region+0x10/0x10 [ 35.352967] ? security_mmap_addr+0x7d/0xa0 [ 35.353481] ? get_unmapped_area+0x1f5/0x3f0 [ 35.354018] do_mmap+0x854/0xf00 [ 35.354442] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.354933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.355501] ksys_mmap_pgoff+0x3af/0x500 [ 35.355996] do_syscall_64+0x3f/0x90 [ 35.356456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.357081] RIP: 0033:0x7f69e8f08d82 [ 35.357521] 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 [ 35.359590] RSP: 002b:00007ffed22aaaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.360468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69e8f08d82 [ 35.361308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69e8342000 [ 35.362188] RBP: 00007f69e8342000 R08: 0000000000000009 R09: 0000000000001000 [ 35.363068] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7bbf3eec0 [ 35.363942] R13: 00007ffed22aab10 R14: 00007ffed22aab40 R15: 00007ffed22aaea0 [ 35.364825] [ 35.365125] [ 35.365344] Allocated by task 214: [ 35.365787] kasan_save_stack+0x22/0x50 [ 35.366305] kasan_set_track+0x25/0x30 [ 35.366814] __kasan_slab_alloc+0x59/0x70 [ 35.367372] kmem_cache_alloc+0x16b/0x370 [ 35.367907] vm_area_dup+0x20/0x160 [ 35.368376] __split_vma+0x170/0x950 [ 35.368858] split_vma+0xc6/0x110 [ 35.369312] mprotect_fixup+0x8d2/0xb30 [ 35.369829] do_mprotect_pkey+0x87e/0xd40 [ 35.370368] __x64_sys_mprotect+0x78/0xc0 [ 35.370903] do_syscall_64+0x3f/0x90 [ 35.371403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.372069] [ 35.372289] Freed by task 214: [ 35.372692] kasan_save_stack+0x22/0x50 [ 35.373210] kasan_set_track+0x25/0x30 [ 35.373721] kasan_save_free_info+0x2b/0x50 [ 35.374320] __kasan_slab_free+0x10a/0x190 [ 35.374889] kmem_cache_free+0x10d/0x4d0 [ 35.375454] rcu_core+0x8c8/0x2860 [ 35.375932] __do_softirq+0x1b7/0x7d4 [ 35.376445] [ 35.376677] Last potentially related work creation: [ 35.377308] kasan_save_stack+0x22/0x50 [ 35.377847] __kasan_record_aux_stack+0x8e/0xa0 [ 35.378463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.379285] remove_vma+0x139/0x170 [ 35.379771] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.380371] do_vmi_munmap+0x1f1/0x2b0 [ 35.380888] __vm_munmap+0x138/0x3a0 [ 35.381391] __x64_sys_munmap+0x59/0x80 [ 35.381922] do_syscall_64+0x3f/0x90 [ 35.382425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.383137] [ 35.383369] The buggy address belongs to the object at ffff88801663f9f8 [ 35.383369] which belongs to the cache vm_area_struct of size 168 [ 35.384950] The buggy address is located 88 bytes inside of [ 35.384950] freed 168-byte region [ffff88801663f9f8, ffff88801663faa0) [ 35.386464] [ 35.386693] The buggy address belongs to the physical page: [ 35.387427] page:00000000b1fb0a10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1663f [ 35.388603] memcg:ffff888016638301 [ 35.389068] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.389768] page_type: 0xffffffff() [ 35.390253] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.391262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016638301 [ 35.392242] page dumped because: kasan: bad access detected [ 35.392957] [ 35.393188] Memory state around the buggy address: [ 35.393817] ffff88801663f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.394742] ffff88801663f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.395685] >ffff88801663fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.396603] ^ [ 35.397356] ffff88801663fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.398277] ffff88801663fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.399200] ================================================================== [ 35.400204] Disabling lock debugging due to kernel taint [ 37.917655] BUG: Bad rss-counter state mm:0000000058705e98 type:MM_FILEPAGES val:33 [ 37.918688] BUG: Bad rss-counter state mm:0000000058705e98 type:MM_ANONPAGES val:22 [ 38.392299] BUG: Bad rss-counter state mm:00000000860cf1cb type:MM_FILEPAGES val:33 [ 38.393357] BUG: Bad rss-counter state mm:00000000860cf1cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65070' (ECDSA) to the list of known hosts. 2023/06/20 00:24:17 fuzzer started 2023/06/20 00:24:18 dialing manager at localhost:44161 2023/06/20 00:24:18 checking machine... 2023/06/20 00:24:18 checking revisions... [ 39.119080] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:24:18 testing simple program... [ 39.176599] cgroup: Unknown subsys name 'net' [ 39.223741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:13 Registers: info registers vcpu 0 RAX=1ffff11001b6f9b5 RBX=ffff88800db7cd78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800db7cda8 RBP=ffff88801a067c00 RSP=ffff88800fd478e8 R8 =0000000000000001 R9 =ffffed1001fa8f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a069280 R14=ffffffff8366dfdf R15=0000000000000014 RIP=ffffffff81846362 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb69ce72900 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=00007ffe706de000 CR3=000000001a2de000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fc58b4d1430 CR3=0000000009796000 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=2037313a34323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a34323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000