syzkaller login: [ 38.809848] BUG: Bad rss-counter state mm:000000009a2ac7ff type:MM_FILEPAGES val:33 [ 38.811228] BUG: Bad rss-counter state mm:000000009a2ac7ff type:MM_ANONPAGES val:22 [ 38.963144] ================================================================== [ 38.964250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.965549] Read of size 8 at addr ffff88800a478228 by task sshd/220 [ 38.966462] [ 38.966764] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.967823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.968793] Call Trace: [ 38.969117] [ 38.969407] dump_stack_lvl+0x91/0xf0 [ 38.969909] print_report+0xcc/0x620 [ 38.970402] ? __virt_addr_valid+0x102/0x340 [ 38.970985] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971619] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972269] kasan_report+0xbe/0xf0 [ 38.972772] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973430] vma_interval_tree_remove+0xc75/0xec0 [ 38.974070] vma_prepare+0xc54/0x11a0 [ 38.974573] __split_vma+0x5af/0x950 [ 38.975113] ? __pfx___split_vma+0x10/0x10 [ 38.975709] ? find_held_lock+0x2c/0x110 [ 38.976272] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.976885] ? lock_is_held_type+0x9f/0x120 [ 38.977466] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.978121] ? mtree_range_walk+0x632/0x900 [ 38.978748] ? mas_walk+0x5c7/0x7c0 [ 38.979254] do_vmi_munmap+0x1f1/0x2b0 [ 38.979804] mmap_region+0x1f9/0x2660 [ 38.980335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.980900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.981669] ? __pfx_lock_acquire+0x10/0x10 [ 38.982231] ? __pfx_mmap_region+0x10/0x10 [ 38.982830] ? security_mmap_addr+0x7d/0xa0 [ 38.983403] ? get_unmapped_area+0x1f5/0x3f0 [ 38.984164] do_mmap+0x854/0xf00 [ 38.984696] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.985273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.985940] ksys_mmap_pgoff+0x3af/0x500 [ 38.986538] do_syscall_64+0x3f/0x90 [ 38.987100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987890] RIP: 0033:0x7f7bee29fd82 [ 38.988430] 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 [ 38.990923] RSP: 002b:00007fff4f4e5328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.992019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bee29fd82 [ 38.993014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bed6d9000 [ 38.994013] RBP: 00007f7bed6d9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.995007] R10: 0000000000000812 R11: 0000000000000206 R12: 000056508b4d6ec0 [ 38.996014] R13: 00007fff4f4e5340 R14: 00007fff4f4e5370 R15: 00007fff4f4e56d0 [ 38.997016] [ 38.997364] [ 38.997617] Allocated by task 212: [ 38.998121] kasan_save_stack+0x22/0x50 [ 38.998715] kasan_set_track+0x25/0x30 [ 38.999306] __kasan_slab_alloc+0x59/0x70 [ 38.999926] kmem_cache_alloc+0x16b/0x370 [ 39.000323] vm_area_dup+0x20/0x160 [ 39.000675] __split_vma+0x170/0x950 [ 39.001034] split_vma+0xc6/0x110 [ 39.001368] mprotect_fixup+0x8d2/0xb30 [ 39.001751] do_mprotect_pkey+0x87e/0xd40 [ 39.002149] __x64_sys_mprotect+0x78/0xc0 [ 39.002554] do_syscall_64+0x3f/0x90 [ 39.002921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.003412] [ 39.003588] Freed by task 19: [ 39.003884] kasan_save_stack+0x22/0x50 [ 39.004270] kasan_set_track+0x25/0x30 [ 39.004651] kasan_save_free_info+0x2b/0x50 [ 39.005132] __kasan_slab_free+0x10a/0x190 [ 39.005539] kmem_cache_free+0x10d/0x4d0 [ 39.005943] rcu_core+0x8c8/0x2860 [ 39.006283] __do_softirq+0x1b7/0x7d4 [ 39.006668] [ 39.006834] Last potentially related work creation: [ 39.007282] kasan_save_stack+0x22/0x50 [ 39.007679] __kasan_record_aux_stack+0x8e/0xa0 [ 39.008115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.008598] remove_vma+0x139/0x170 [ 39.008943] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.009368] do_vmi_munmap+0x1f1/0x2b0 [ 39.009737] __vm_munmap+0x138/0x3a0 [ 39.010096] __x64_sys_munmap+0x59/0x80 [ 39.010469] do_syscall_64+0x3f/0x90 [ 39.010828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011324] [ 39.011495] The buggy address belongs to the object at ffff88800a4781d0 [ 39.011495] which belongs to the cache vm_area_struct of size 168 [ 39.012617] The buggy address is located 88 bytes inside of [ 39.012617] freed 168-byte region [ffff88800a4781d0, ffff88800a478278) [ 39.013696] [ 39.013862] The buggy address belongs to the physical page: [ 39.014377] page:0000000066177d26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa478 [ 39.015208] memcg:ffff88800f4a5701 [ 39.015544] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.016038] page_type: 0xffffffff() [ 39.016382] raw: 0100000000000200 ffff8880087a0c80 ffffea00005bd140 dead000000000004 [ 39.017090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4a5701 [ 39.017780] page dumped because: kasan: bad access detected [ 39.018288] [ 39.018455] Memory state around the buggy address: [ 39.018901] ffff88800a478100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.019576] ffff88800a478180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.020241] >ffff88800a478200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.020890] ^ [ 39.021317] ffff88800a478280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.021980] ffff88800a478300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.022617] ================================================================== [ 39.023436] Disabling lock debugging due to kernel taint [ 41.476662] BUG: Bad rss-counter state mm:00000000b4dcad2d type:MM_FILEPAGES val:33 [ 41.477605] BUG: Bad rss-counter state mm:00000000b4dcad2d type:MM_ANONPAGES val:22 [ 42.048247] BUG: Bad rss-counter state mm:000000005ea1ba53 type:MM_FILEPAGES val:33 [ 42.049407] BUG: Bad rss-counter state mm:000000005ea1ba53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12670' (ECDSA) to the list of known hosts. 2023/06/20 14:55:41 fuzzer started 2023/06/20 14:55:42 dialing manager at localhost:36067 2023/06/20 14:55:42 checking machine... 2023/06/20 14:55:42 checking revisions... [ 42.713740] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:55:42 testing simple program... [ 42.772543] cgroup: Unknown subsys name 'net' [ 42.816543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:55:41 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000090 RCX=0000000000000000 RDX=0000000000000090 RSI=00007ffc81fae6a0 RDI=ffff888019fdea00 RBP=00007ffc81fae6a0 RSP=ffff88801675fa78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888019fdea00 R13=0000000000000090 R14=0000000000000090 R15=ffff88801675fd90 RIP=ffffffff814c086b 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 00007f576cfb8900 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=00007ffc81faf000 CR3=0000000015a3a000 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=6720646572637465733a4d41503d706f 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 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=00007f8707f43f50 CR3=0000000010158000 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=2031343a35353a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35353a3431203032 XMM08=3d6874617020303d64696720303d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000