syzkaller login: [ 31.375710] BUG: Bad rss-counter state mm:00000000c53726bc type:MM_FILEPAGES val:33 [ 31.376950] BUG: Bad rss-counter state mm:00000000c53726bc type:MM_ANONPAGES val:22 [ 31.417648] ================================================================== [ 31.418689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.419627] Read of size 8 at addr ffff888019ae24e0 by task sshd/221 [ 31.420400] [ 31.420625] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.421493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.422480] Call Trace: [ 31.422806] [ 31.423095] dump_stack_lvl+0x91/0xf0 [ 31.423588] print_report+0xcc/0x620 [ 31.424074] ? __virt_addr_valid+0x102/0x340 [ 31.424639] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.425263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.425881] kasan_report+0xbe/0xf0 [ 31.426385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.427019] vma_interval_tree_remove+0xc75/0xec0 [ 31.427614] vma_prepare+0xc54/0x11a0 [ 31.428087] __split_vma+0x5af/0x950 [ 31.428562] ? __pfx___split_vma+0x10/0x10 [ 31.429091] ? find_held_lock+0x2c/0x110 [ 31.429605] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.430167] ? lock_is_held_type+0x9f/0x120 [ 31.430715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.431318] ? mtree_range_walk+0x632/0x900 [ 31.431864] ? mas_walk+0x5c7/0x7c0 [ 31.432339] do_vmi_munmap+0x1f1/0x2b0 [ 31.432826] mmap_region+0x1f9/0x2660 [ 31.433303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.433814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.434538] ? __pfx_lock_acquire+0x10/0x10 [ 31.435070] ? __pfx_mmap_region+0x10/0x10 [ 31.435602] ? security_mmap_addr+0x7d/0xa0 [ 31.436133] ? get_unmapped_area+0x1f5/0x3f0 [ 31.436684] do_mmap+0x854/0xf00 [ 31.437130] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.437630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.438190] ksys_mmap_pgoff+0x3af/0x500 [ 31.438715] do_syscall_64+0x3f/0x90 [ 31.439191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439832] RIP: 0033:0x7f1db7e99d82 [ 31.440287] 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 [ 31.442577] RSP: 002b:00007ffcd25cd8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.443496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1db7e99d82 [ 31.444365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1db72d3000 [ 31.445223] RBP: 00007f1db72d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.446079] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa12bded90 [ 31.446943] R13: 00007ffcd25cd8c0 R14: 00007ffcd25cd8f0 R15: 00007ffcd25cdc50 [ 31.447807] [ 31.448112] [ 31.448326] Allocated by task 214: [ 31.448757] kasan_save_stack+0x22/0x50 [ 31.449274] kasan_set_track+0x25/0x30 [ 31.449772] __kasan_slab_alloc+0x59/0x70 [ 31.450355] kmem_cache_alloc+0x16b/0x370 [ 31.450906] vm_area_dup+0x20/0x160 [ 31.451366] __split_vma+0x170/0x950 [ 31.451836] split_vma+0xc6/0x110 [ 31.452283] mprotect_fixup+0x8d2/0xb30 [ 31.452786] do_mprotect_pkey+0x87e/0xd40 [ 31.453300] __x64_sys_mprotect+0x78/0xc0 [ 31.453823] do_syscall_64+0x3f/0x90 [ 31.454307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.454956] [ 31.455175] Freed by task 214: [ 31.455566] kasan_save_stack+0x22/0x50 [ 31.456066] kasan_set_track+0x25/0x30 [ 31.456560] kasan_save_free_info+0x2b/0x50 [ 31.457091] __kasan_slab_free+0x10a/0x190 [ 31.457624] kmem_cache_free+0x10d/0x4d0 [ 31.458129] rcu_core+0x8c8/0x2860 [ 31.458594] __do_softirq+0x1b7/0x7d4 [ 31.459067] [ 31.459281] Last potentially related work creation: [ 31.459865] kasan_save_stack+0x22/0x50 [ 31.460383] __kasan_record_aux_stack+0x8e/0xa0 [ 31.460963] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.461611] remove_vma+0x139/0x170 [ 31.462083] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.462653] do_vmi_munmap+0x1f1/0x2b0 [ 31.463150] __vm_munmap+0x138/0x3a0 [ 31.463635] __x64_sys_munmap+0x59/0x80 [ 31.464129] do_syscall_64+0x3f/0x90 [ 31.464608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.465257] [ 31.465475] The buggy address belongs to the object at ffff888019ae2488 [ 31.465475] which belongs to the cache vm_area_struct of size 168 [ 31.466993] The buggy address is located 88 bytes inside of [ 31.466993] freed 168-byte region [ffff888019ae2488, ffff888019ae2530) [ 31.468425] [ 31.468641] The buggy address belongs to the physical page: [ 31.469309] page:00000000d879ca12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ae2 [ 31.470430] memcg:ffff88800c50ae01 [ 31.470875] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.471520] page_type: 0xffffffff() [ 31.471968] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.472887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c50ae01 [ 31.473793] page dumped because: kasan: bad access detected [ 31.474458] [ 31.474671] Memory state around the buggy address: [ 31.475252] ffff888019ae2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.476111] ffff888019ae2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.476956] >ffff888019ae2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.477804] ^ [ 31.478577] ffff888019ae2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.479422] ffff888019ae2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.480269] ================================================================== [ 31.481364] Disabling lock debugging due to kernel taint [ 33.581203] BUG: Bad rss-counter state mm:0000000053f16227 type:MM_FILEPAGES val:33 [ 33.582137] BUG: Bad rss-counter state mm:0000000053f16227 type:MM_ANONPAGES val:22 [ 34.078519] BUG: Bad rss-counter state mm:000000004a9d12e0 type:MM_FILEPAGES val:33 [ 34.079555] BUG: Bad rss-counter state mm:000000004a9d12e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50633' (ECDSA) to the list of known hosts. 2023/06/19 10:57:28 fuzzer started 2023/06/19 10:57:28 dialing manager at localhost:44161 2023/06/19 10:57:28 checking machine... 2023/06/19 10:57:28 checking revisions... [ 34.803685] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:57:28 testing simple program... [ 34.854880] cgroup: Unknown subsys name 'net' [ 34.907938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fbe84311f20 CR3=000000000d8ba000 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=52807f8aabfbb992124df4d7a77cab3a XMM02=2c67c8bc2e329bc3000000000011dc18 XMM03=fb795ef6d657705600000000001248e8 XMM04=f0afeb0b3a1d0c7100000000000ae988 XMM05=b761df155f50844e0000000000135238 XMM06=00c3ffa147b8d85700000000001342d8 XMM07=e042d86d42eb936e0000000000124b68 XMM08=efab7334cd2c8dea000000000011dc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809911 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100283aee1 RSI=ffffffff81809911 RDI=ffff8880141d7778 RBP=ffff8880141d7748 RSP=ffff8880141d76a8 R8 =0000000000000001 R9 =ffff8880141d76f0 R10=0000000000038001 R11=000000000000fc0f R12=ffff8880141d7778 R13=0000000000000000 R14=ffff8880159551c0 R15=0000000000000000 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f3daca9f900 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=00007f3daca7e020 CR3=00000000197b0000 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