syzkaller login: [ 30.775270] BUG: Bad rss-counter state mm:000000003abc94d1 type:MM_FILEPAGES val:33 [ 30.776852] BUG: Bad rss-counter state mm:000000003abc94d1 type:MM_ANONPAGES val:22 [ 30.926335] ================================================================== [ 30.927450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.928627] Read of size 8 at addr ffff888018828c20 by task sshd/221 [ 30.929748] [ 30.930024] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.931107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.932272] Call Trace: [ 30.932608] [ 30.932902] dump_stack_lvl+0x91/0xf0 [ 30.933400] print_report+0xcc/0x620 [ 30.933891] ? __virt_addr_valid+0x102/0x340 [ 30.934455] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935709] kasan_report+0xbe/0xf0 [ 30.936195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936839] vma_interval_tree_remove+0xc75/0xec0 [ 30.937448] vma_prepare+0xc54/0x11a0 [ 30.937939] __split_vma+0x5af/0x950 [ 30.938422] ? __pfx___split_vma+0x10/0x10 [ 30.938959] ? find_held_lock+0x2c/0x110 [ 30.939486] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.940057] ? lock_is_held_type+0x9f/0x120 [ 30.940624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.941238] ? mtree_range_walk+0x632/0x900 [ 30.941799] ? mas_walk+0x5c7/0x7c0 [ 30.942285] do_vmi_munmap+0x1f1/0x2b0 [ 30.942783] mmap_region+0x1f9/0x2660 [ 30.943265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.943785] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.944510] ? __pfx_lock_acquire+0x10/0x10 [ 30.945076] ? __pfx_mmap_region+0x10/0x10 [ 30.945623] ? security_mmap_addr+0x7d/0xa0 [ 30.946179] ? get_unmapped_area+0x1f5/0x3f0 [ 30.946758] do_mmap+0x854/0xf00 [ 30.947216] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.947725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.948304] ksys_mmap_pgoff+0x3af/0x500 [ 30.948836] do_syscall_64+0x3f/0x90 [ 30.949327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949986] RIP: 0033:0x7f49a0facd82 [ 30.950452] 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 [ 30.952617] RSP: 002b:00007ffc7f007528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.953553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49a0facd82 [ 30.954456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49a03e6000 [ 30.955349] RBP: 00007f49a03e6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.956221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e1fcc5ec0 [ 30.957085] R13: 00007ffc7f007540 R14: 00007ffc7f007570 R15: 00007ffc7f0078d0 [ 30.957967] [ 30.958267] [ 30.958483] Allocated by task 214: [ 30.958916] kasan_save_stack+0x22/0x50 [ 30.959417] kasan_set_track+0x25/0x30 [ 30.959915] __kasan_slab_alloc+0x59/0x70 [ 30.960446] kmem_cache_alloc+0x16b/0x370 [ 30.960979] vm_area_dup+0x20/0x160 [ 30.961434] __split_vma+0x170/0x950 [ 30.961911] split_vma+0xc6/0x110 [ 30.962350] mprotect_fixup+0x8d2/0xb30 [ 30.962865] do_mprotect_pkey+0x87e/0xd40 [ 30.963391] __x64_sys_mprotect+0x78/0xc0 [ 30.963913] do_syscall_64+0x3f/0x90 [ 30.964392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965068] [ 30.965288] Freed by task 214: [ 30.965686] kasan_save_stack+0x22/0x50 [ 30.966188] kasan_set_track+0x25/0x30 [ 30.966683] kasan_save_free_info+0x2b/0x50 [ 30.967219] __kasan_slab_free+0x10a/0x190 [ 30.967760] kmem_cache_free+0x10d/0x4d0 [ 30.968270] rcu_core+0x8c8/0x2860 [ 30.968721] __do_softirq+0x1b7/0x7d4 [ 30.969207] [ 30.969423] Last potentially related work creation: [ 30.970012] kasan_save_stack+0x22/0x50 [ 30.970565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.971137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.971778] remove_vma+0x139/0x170 [ 30.972268] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.972966] do_vmi_munmap+0x1f1/0x2b0 [ 30.973554] __vm_munmap+0x138/0x3a0 [ 30.974129] __x64_sys_munmap+0x59/0x80 [ 30.974730] do_syscall_64+0x3f/0x90 [ 30.975312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976106] [ 30.976364] The buggy address belongs to the object at ffff888018828bc8 [ 30.976364] which belongs to the cache vm_area_struct of size 168 [ 30.978146] The buggy address is located 88 bytes inside of [ 30.978146] freed 168-byte region [ffff888018828bc8, ffff888018828c70) [ 30.979885] [ 30.980148] The buggy address belongs to the physical page: [ 30.980969] page:00000000897b1869 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18828 [ 30.982305] memcg:ffff888018820201 [ 30.982819] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.983608] page_type: 0xffffffff() [ 30.984158] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.985300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018820201 [ 30.986425] page dumped because: kasan: bad access detected [ 30.987243] [ 30.987505] Memory state around the buggy address: [ 30.988206] ffff888018828b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.989258] ffff888018828b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.990282] >ffff888018828c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.991290] ^ [ 30.991926] ffff888018828c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.992987] ffff888018828d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.994024] ================================================================== [ 30.995124] Disabling lock debugging due to kernel taint [ 32.962953] BUG: Bad rss-counter state mm:00000000a4a4d0b8 type:MM_FILEPAGES val:33 [ 32.963854] BUG: Bad rss-counter state mm:00000000a4a4d0b8 type:MM_ANONPAGES val:22 [ 33.547998] BUG: Bad rss-counter state mm:00000000aa49b2d2 type:MM_FILEPAGES val:33 [ 33.549198] BUG: Bad rss-counter state mm:00000000aa49b2d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50189' (ECDSA) to the list of known hosts. 2023/06/20 20:12:43 fuzzer started 2023/06/20 20:12:43 dialing manager at localhost:36067 2023/06/20 20:12:43 checking machine... 2023/06/20 20:12:43 checking revisions... [ 34.183504] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:12:44 testing simple program... [ 34.236038] cgroup: Unknown subsys name 'net' [ 34.284390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:12:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff8183a44c RSP=ffff88800fe1fc50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffff88800d82b280 R14=0000000000000cc0 R15=0000000000000000 RIP=ffffffff815342e3 RFL=00000047 [---Z-PC] 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 00007f8402090900 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=00007f84026480b0 CR3=000000000fc14000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f59b1893ac0 CR3=000000000e486000 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=2033343a32313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a32313a3032203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000