syzkaller login: [ 30.544473] BUG: Bad rss-counter state mm:00000000c2e53379 type:MM_FILEPAGES val:33 [ 30.545734] BUG: Bad rss-counter state mm:00000000c2e53379 type:MM_ANONPAGES val:22 [ 30.715995] ================================================================== [ 30.716988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.718005] Read of size 8 at addr ffff88800d926140 by task sshd/220 [ 30.718937] [ 30.719171] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.720083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.721115] Call Trace: [ 30.721453] [ 30.721759] dump_stack_lvl+0x91/0xf0 [ 30.722285] print_report+0xcc/0x620 [ 30.722830] ? __virt_addr_valid+0x102/0x340 [ 30.723428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724768] kasan_report+0xbe/0xf0 [ 30.725285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725962] vma_interval_tree_remove+0xc75/0xec0 [ 30.726625] vma_prepare+0xc54/0x11a0 [ 30.727147] __split_vma+0x5af/0x950 [ 30.727658] ? __pfx___split_vma+0x10/0x10 [ 30.728241] ? find_held_lock+0x2c/0x110 [ 30.728814] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.729430] ? lock_is_held_type+0x9f/0x120 [ 30.730018] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.730689] ? mtree_range_walk+0x632/0x900 [ 30.731295] ? mas_walk+0x5c7/0x7c0 [ 30.731814] do_vmi_munmap+0x1f1/0x2b0 [ 30.732350] mmap_region+0x1f9/0x2660 [ 30.732873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734214] ? __pfx_lock_acquire+0x10/0x10 [ 30.734811] ? __pfx_mmap_region+0x10/0x10 [ 30.735388] ? security_mmap_addr+0x7d/0xa0 [ 30.735969] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736576] do_mmap+0x854/0xf00 [ 30.737063] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738212] ksys_mmap_pgoff+0x3af/0x500 [ 30.738773] do_syscall_64+0x3f/0x90 [ 30.739296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739999] RIP: 0033:0x7f15f8eacd82 [ 30.740495] 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 [ 30.742836] RSP: 002b:00007ffe253ea6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15f8eacd82 [ 30.744742] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15f82e6000 [ 30.745669] RBP: 00007f15f82e6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.746595] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0176daec0 [ 30.747511] R13: 00007ffe253ea6e0 R14: 00007ffe253ea710 R15: 00007ffe253eaa70 [ 30.748441] [ 30.748765] [ 30.748998] Allocated by task 213: [ 30.749464] kasan_save_stack+0x22/0x50 [ 30.750014] kasan_set_track+0x25/0x30 [ 30.750565] __kasan_slab_alloc+0x59/0x70 [ 30.751134] kmem_cache_alloc+0x16b/0x370 [ 30.751694] vm_area_dup+0x20/0x160 [ 30.752189] __split_vma+0x170/0x950 [ 30.752692] split_vma+0xc6/0x110 [ 30.753169] mprotect_fixup+0x8d2/0xb30 [ 30.753713] do_mprotect_pkey+0x87e/0xd40 [ 30.754277] __x64_sys_mprotect+0x78/0xc0 [ 30.754845] do_syscall_64+0x3f/0x90 [ 30.755363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756060] [ 30.756296] Freed by task 213: [ 30.756728] kasan_save_stack+0x22/0x50 [ 30.757272] kasan_set_track+0x25/0x30 [ 30.757810] kasan_save_free_info+0x2b/0x50 [ 30.758388] __kasan_slab_free+0x10a/0x190 [ 30.758993] kmem_cache_free+0x10d/0x4d0 [ 30.759545] rcu_core+0x8c8/0x2860 [ 30.760028] __do_softirq+0x1b7/0x7d4 [ 30.760548] [ 30.760783] Last potentially related work creation: [ 30.761428] kasan_save_stack+0x22/0x50 [ 30.761980] __kasan_record_aux_stack+0x8e/0xa0 [ 30.762615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.763314] remove_vma+0x139/0x170 [ 30.763805] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.764415] do_vmi_munmap+0x1f1/0x2b0 [ 30.764942] __vm_munmap+0x138/0x3a0 [ 30.765448] __x64_sys_munmap+0x59/0x80 [ 30.765989] do_syscall_64+0x3f/0x90 [ 30.766503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767210] [ 30.767440] The buggy address belongs to the object at ffff88800d9260e8 [ 30.767440] which belongs to the cache vm_area_struct of size 168 [ 30.769048] The buggy address is located 88 bytes inside of [ 30.769048] freed 168-byte region [ffff88800d9260e8, ffff88800d926190) [ 30.770594] [ 30.770832] The buggy address belongs to the physical page: [ 30.771551] page:000000002b42b579 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd926 [ 30.772722] memcg:ffff88800e967d01 [ 30.773170] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.773856] page_type: 0xffffffff() [ 30.774342] raw: 0100000000000200 ffff8880087a0c80 ffffea00006339c0 dead000000000004 [ 30.775347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e967d01 [ 30.776337] page dumped because: kasan: bad access detected [ 30.777053] [ 30.777291] Memory state around the buggy address: [ 30.777924] ffff88800d926000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.778873] ffff88800d926080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.779812] >ffff88800d926100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.780738] ^ [ 30.781441] ffff88800d926180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.782363] ffff88800d926200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.783310] ================================================================== [ 30.784440] Disabling lock debugging due to kernel taint [ 32.780147] BUG: Bad rss-counter state mm:000000001afea2b9 type:MM_FILEPAGES val:33 [ 32.781129] BUG: Bad rss-counter state mm:000000001afea2b9 type:MM_ANONPAGES val:22 [ 33.273418] BUG: Bad rss-counter state mm:00000000f96da41e type:MM_FILEPAGES val:33 [ 33.274397] BUG: Bad rss-counter state mm:00000000f96da41e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64350' (ECDSA) to the list of known hosts. 2023/06/21 07:29:42 fuzzer started 2023/06/21 07:29:42 dialing manager at localhost:36067 2023/06/21 07:29:42 checking machine... 2023/06/21 07:29:42 checking revisions... [ 33.988926] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:29:43 testing simple program... [ 34.026619] cgroup: Unknown subsys name 'net' [ 34.087578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:29:42 Registers: info registers vcpu 0 RAX=000000000000002c RBX=000056285883eedf RCX=0000000000000030 RDX=0000000000000001 RSI=0000562858841bb0 RDI=000056285883eee0 RBP=0000000000000000 RSP=00007ffd141b4968 R8 =000056285883eeb0 R9 =0074696d7265705f R10=000056285883eeb0 R11=0000000000000297 R12=0000000000000008 R13=000056285883f350 R14=0000000000000069 R15=0000562858862c20 RIP=00007f4dbf338edf RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4dbede3900 00000000 00000000 GS =0000 0000000000000000 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=00007f4dbf39b0b0 CR3=000000000feb2000 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=ffffffffffffff000000000000000000 XMM02=000000000000000000000000000000ff XMM03=00007f4d006f730078696e755f6d6170 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=00007fbb97132108 CR3=000000000d6c8000 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=197b0515e79120bfff44555795b52f03 XMM02=2c67c8bc2e329bc3000000000011ab80 XMM03=fb795ef6d65770560000000000121850 XMM04=7bae97f783201fe500000000000ae988 XMM05=95101deff1e7d4be0000000000131b18 XMM06=4fda316b135da52b0000000000131510 XMM07=e042d86d42eb936e0000000000121ad0 XMM08=9793ef9f7ca63902000000000011abe0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000