syzkaller login: [ 34.073976] BUG: Bad rss-counter state mm:000000006ffc7937 type:MM_FILEPAGES val:33 [ 34.075638] BUG: Bad rss-counter state mm:000000006ffc7937 type:MM_ANONPAGES val:22 [ 34.235111] ================================================================== [ 34.236050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.237008] Read of size 8 at addr ffff88800e97d5c8 by task sshd/219 [ 34.237869] [ 34.238124] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.239029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.240058] Call Trace: [ 34.240386] [ 34.240676] dump_stack_lvl+0x91/0xf0 [ 34.241181] print_report+0xcc/0x620 [ 34.241676] ? __virt_addr_valid+0x102/0x340 [ 34.242232] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.242878] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.243523] kasan_report+0xbe/0xf0 [ 34.244011] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.244660] vma_interval_tree_remove+0xc75/0xec0 [ 34.245283] vma_prepare+0xc54/0x11a0 [ 34.245787] __split_vma+0x5af/0x950 [ 34.246279] ? __pfx___split_vma+0x10/0x10 [ 34.246836] ? find_held_lock+0x2c/0x110 [ 34.247369] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.247960] ? lock_is_held_type+0x9f/0x120 [ 34.248515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.249143] ? mtree_range_walk+0x632/0x900 [ 34.249718] ? mas_walk+0x5c7/0x7c0 [ 34.250204] do_vmi_munmap+0x1f1/0x2b0 [ 34.250730] mmap_region+0x1f9/0x2660 [ 34.251237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.251767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.252507] ? __pfx_lock_acquire+0x10/0x10 [ 34.253060] ? __pfx_mmap_region+0x10/0x10 [ 34.253605] ? security_mmap_addr+0x7d/0xa0 [ 34.254155] ? get_unmapped_area+0x1f5/0x3f0 [ 34.254738] do_mmap+0x854/0xf00 [ 34.255191] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.255699] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.256277] ksys_mmap_pgoff+0x3af/0x500 [ 34.256801] do_syscall_64+0x3f/0x90 [ 34.257296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.257964] RIP: 0033:0x7f31381e8d82 [ 34.258443] 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 [ 34.260673] RSP: 002b:00007ffde28edde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.261602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31381e8d82 [ 34.262493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3137622000 [ 34.263366] RBP: 00007f3137622000 R08: 0000000000000009 R09: 0000000000001000 [ 34.264250] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae2e4daf70 [ 34.265141] R13: 00007ffde28ede00 R14: 00007ffde28ede30 R15: 00007ffde28ee190 [ 34.266045] [ 34.266351] [ 34.266577] Allocated by task 212: [ 34.267022] kasan_save_stack+0x22/0x50 [ 34.267548] kasan_set_track+0x25/0x30 [ 34.268066] __kasan_slab_alloc+0x59/0x70 [ 34.268611] kmem_cache_alloc+0x16b/0x370 [ 34.269152] vm_area_dup+0x20/0x160 [ 34.269633] __split_vma+0x170/0x950 [ 34.270118] split_vma+0xc6/0x110 [ 34.270598] mprotect_fixup+0x8d2/0xb30 [ 34.271122] do_mprotect_pkey+0x87e/0xd40 [ 34.271673] __x64_sys_mprotect+0x78/0xc0 [ 34.272219] do_syscall_64+0x3f/0x90 [ 34.272709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.273386] [ 34.273609] Freed by task 212: [ 34.274020] kasan_save_stack+0x22/0x50 [ 34.274552] kasan_set_track+0x25/0x30 [ 34.275060] kasan_save_free_info+0x2b/0x50 [ 34.275620] __kasan_slab_free+0x10a/0x190 [ 34.276185] kmem_cache_free+0x10d/0x4d0 [ 34.276713] rcu_core+0x8c8/0x2860 [ 34.277182] __do_softirq+0x1b7/0x7d4 [ 34.277682] [ 34.277901] Last potentially related work creation: [ 34.278536] kasan_save_stack+0x22/0x50 [ 34.279061] __kasan_record_aux_stack+0x8e/0xa0 [ 34.279658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.280334] remove_vma+0x139/0x170 [ 34.280802] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.281391] do_vmi_munmap+0x1f1/0x2b0 [ 34.281895] __vm_munmap+0x138/0x3a0 [ 34.282382] __x64_sys_munmap+0x59/0x80 [ 34.282906] do_syscall_64+0x3f/0x90 [ 34.283401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.284069] [ 34.284299] The buggy address belongs to the object at ffff88800e97d570 [ 34.284299] which belongs to the cache vm_area_struct of size 168 [ 34.285839] The buggy address is located 88 bytes inside of [ 34.285839] freed 168-byte region [ffff88800e97d570, ffff88800e97d618) [ 34.287368] [ 34.287594] The buggy address belongs to the physical page: [ 34.288300] page:0000000051a3df4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe97d [ 34.289434] memcg:ffff88800e94a001 [ 34.289881] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.290574] page_type: 0xffffffff() [ 34.291047] raw: 0100000000000200 ffff88800879fc80 ffffea0000379f40 dead000000000006 [ 34.292038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e94a001 [ 34.293004] page dumped because: kasan: bad access detected [ 34.293711] [ 34.293936] Memory state around the buggy address: [ 34.294555] ffff88800e97d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.295456] ffff88800e97d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.296360] >ffff88800e97d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.297261] ^ [ 34.297965] ffff88800e97d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.298880] ffff88800e97d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.299768] ================================================================== [ 34.300777] Disabling lock debugging due to kernel taint [ 36.573474] BUG: Bad rss-counter state mm:00000000822b415c type:MM_FILEPAGES val:33 [ 36.574465] BUG: Bad rss-counter state mm:00000000822b415c type:MM_ANONPAGES val:22 [ 37.143666] BUG: Bad rss-counter state mm:000000004bd2c0ca type:MM_FILEPAGES val:33 [ 37.144790] BUG: Bad rss-counter state mm:000000004bd2c0ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63464' (ECDSA) to the list of known hosts. 2023/06/19 20:12:06 fuzzer started 2023/06/19 20:12:07 dialing manager at localhost:44161 2023/06/19 20:12:07 checking machine... 2023/06/19 20:12:07 checking revisions... [ 37.788455] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:12:07 testing simple program... [ 37.838244] cgroup: Unknown subsys name 'net' [ 37.889699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:12:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ee2f9a0 RCX=0000000000000001 RDX=1ffff11001dc5f34 RSI=ffff88800ee2fdf0 RDI=ffff88800ee2f9a0 RBP=ffff88800ee2fa38 RSP=ffff88800ee2f988 R8 =0000000000000001 R9 =ffff88800ee2f9e0 R10=0000000000038001 R11=0000000000091a6c R12=ffff88800ee2fa68 R13=0000000000000000 R14=ffff888015b151c0 R15=ffff88801a492be0 RIP=ffffffff8113035a RFL=00000212 [----A--] 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 00007fea8e07e900 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=00007fea8e6360b0 CR3=00000000167d4000 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=2036303a32313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a32313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a58b21 RBX=ffff888008d876d8 RCX=0000000000000000 RDX=0000000000039500 RSI=0000000000039500 RDI=ffffffff852c5908 RBP=0000000000000001 RSP=ffff888008d87508 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008deb180 R11=0000000000000000 R12=ffff88806cf286b8 R13=0000000000000001 R14=ffff888008c58400 R15=ffff888008d87a40 RIP=ffffffff81269e14 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 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=00007ff6bc3a5130 CR3=000000000d60c000 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=a7df0688b0448ea4ab49cf8a629642f4 XMM02=000000000011ebf8eff9b2d0a8fce9cb XMM03=000000000011ecc82c67c8bc2e329bc3 XMM04=fb79adf65ed3d89700000000000ae988 XMM05=19e9129bd510f2350000000000134ab8 XMM06=4fda316b135da52b0000000000134940 XMM07=e042d86d42eb936e00000000001254f8 XMM08=7ec811f9b0b5aaff000000000011ecc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000