syzkaller login: [ 30.942250] BUG: Bad rss-counter state mm:000000002b1e7018 type:MM_FILEPAGES val:33 [ 30.943290] BUG: Bad rss-counter state mm:000000002b1e7018 type:MM_ANONPAGES val:22 [ 31.139021] ================================================================== [ 31.139960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.140940] Read of size 8 at addr ffff88800f5315c8 by task sshd/221 [ 31.141719] [ 31.142016] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.142898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.143931] Call Trace: [ 31.144262] [ 31.144558] dump_stack_lvl+0x91/0xf0 [ 31.145060] print_report+0xcc/0x620 [ 31.145557] ? __virt_addr_valid+0x102/0x340 [ 31.146152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146793] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147436] kasan_report+0xbe/0xf0 [ 31.147922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148590] vma_interval_tree_remove+0xc75/0xec0 [ 31.149204] vma_prepare+0xc54/0x11a0 [ 31.149718] __split_vma+0x5af/0x950 [ 31.150209] ? __pfx___split_vma+0x10/0x10 [ 31.150763] ? find_held_lock+0x2c/0x110 [ 31.151318] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.151909] ? lock_is_held_type+0x9f/0x120 [ 31.152479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.153110] ? mtree_range_walk+0x632/0x900 [ 31.153693] ? mas_walk+0x5c7/0x7c0 [ 31.154197] do_vmi_munmap+0x1f1/0x2b0 [ 31.154716] mmap_region+0x1f9/0x2660 [ 31.155256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.155844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.156657] ? __pfx_lock_acquire+0x10/0x10 [ 31.157268] ? __pfx_mmap_region+0x10/0x10 [ 31.157874] ? security_mmap_addr+0x7d/0xa0 [ 31.158486] ? get_unmapped_area+0x1f5/0x3f0 [ 31.159117] do_mmap+0x854/0xf00 [ 31.159631] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.160200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.160852] ksys_mmap_pgoff+0x3af/0x500 [ 31.161445] do_syscall_64+0x3f/0x90 [ 31.161994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162746] RIP: 0033:0x7fee1054fd82 [ 31.163299] 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 [ 31.165767] RSP: 002b:00007ffe4dddcbe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee1054fd82 [ 31.167790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee0f989000 [ 31.168762] RBP: 00007fee0f989000 R08: 0000000000000009 R09: 0000000000001000 [ 31.169733] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ddda84b20 [ 31.170702] R13: 00007ffe4dddcc00 R14: 00007ffe4dddcc30 R15: 00007ffe4dddcf90 [ 31.171700] [ 31.172033] [ 31.172271] Allocated by task 212: [ 31.172726] kasan_save_stack+0x22/0x50 [ 31.173262] kasan_set_track+0x25/0x30 [ 31.173780] __kasan_slab_alloc+0x59/0x70 [ 31.174333] kmem_cache_alloc+0x16b/0x370 [ 31.174872] vm_area_dup+0x20/0x160 [ 31.175368] __split_vma+0x170/0x950 [ 31.175835] split_vma+0xc6/0x110 [ 31.176275] mprotect_fixup+0x8d2/0xb30 [ 31.176785] do_mprotect_pkey+0x87e/0xd40 [ 31.177312] __x64_sys_mprotect+0x78/0xc0 [ 31.177833] do_syscall_64+0x3f/0x90 [ 31.178314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178965] [ 31.179186] Freed by task 212: [ 31.179591] kasan_save_stack+0x22/0x50 [ 31.180103] kasan_set_track+0x25/0x30 [ 31.180599] kasan_save_free_info+0x2b/0x50 [ 31.181132] __kasan_slab_free+0x10a/0x190 [ 31.181669] kmem_cache_free+0x10d/0x4d0 [ 31.182185] rcu_core+0x8c8/0x2860 [ 31.182637] __do_softirq+0x1b7/0x7d4 [ 31.183125] [ 31.183348] Last potentially related work creation: [ 31.183943] kasan_save_stack+0x22/0x50 [ 31.184465] __kasan_record_aux_stack+0x8e/0xa0 [ 31.185045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.185687] remove_vma+0x139/0x170 [ 31.186140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.186709] do_vmi_munmap+0x1f1/0x2b0 [ 31.187203] __vm_munmap+0x138/0x3a0 [ 31.187699] __x64_sys_munmap+0x59/0x80 [ 31.188195] do_syscall_64+0x3f/0x90 [ 31.188684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189331] [ 31.189550] The buggy address belongs to the object at ffff88800f531570 [ 31.189550] which belongs to the cache vm_area_struct of size 168 [ 31.191039] The buggy address is located 88 bytes inside of [ 31.191039] freed 168-byte region [ffff88800f531570, ffff88800f531618) [ 31.192501] [ 31.192719] The buggy address belongs to the physical page: [ 31.193392] page:00000000582398c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf531 [ 31.194490] memcg:ffff888018cef901 [ 31.194926] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.195602] page_type: 0xffffffff() [ 31.196056] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.196991] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cef901 [ 31.197896] page dumped because: kasan: bad access detected [ 31.198567] [ 31.198783] Memory state around the buggy address: [ 31.199376] ffff88800f531480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.200245] ffff88800f531500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.201090] >ffff88800f531580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.201944] ^ [ 31.202615] ffff88800f531600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.203472] ffff88800f531680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.204318] ================================================================== [ 31.205436] Disabling lock debugging due to kernel taint [ 33.291867] BUG: Bad rss-counter state mm:0000000072b77b82 type:MM_FILEPAGES val:33 [ 33.293078] BUG: Bad rss-counter state mm:0000000072b77b82 type:MM_ANONPAGES val:22 [ 33.789661] BUG: Bad rss-counter state mm:000000002e2f21c8 type:MM_FILEPAGES val:33 [ 33.790845] BUG: Bad rss-counter state mm:000000002e2f21c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40505' (ECDSA) to the list of known hosts. 2023/06/21 09:38:30 fuzzer started 2023/06/21 09:38:30 dialing manager at localhost:36067 2023/06/21 09:38:30 checking machine... 2023/06/21 09:38:30 checking revisions... [ 34.460523] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:38:30 testing simple program... [ 34.512300] cgroup: Unknown subsys name 'net' [ 34.544709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce3de20 RCX=0000000000000000 RDX=00000000800d000d RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800ec7f7e0 RSP=ffff88800ec7f720 R8 =00000000000d000d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=ffffea00003a7240 R15=ffff88806ce3de00 RIP=ffffffff81806eae 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 00007fe093c6e700 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=00007fa5fd0b40f0 CR3=0000000010292000 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=2030333a38333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38333a3930203132 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007f3d10d97618 CR3=0000000010292000 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=38333a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000