syzkaller login: [ 31.073747] BUG: Bad rss-counter state mm:0000000015572950 type:MM_FILEPAGES val:33 [ 31.074741] BUG: Bad rss-counter state mm:0000000015572950 type:MM_ANONPAGES val:22 [ 31.260449] ================================================================== [ 31.261441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.262455] Read of size 8 at addr ffff88800fb0a4e0 by task sshd/220 [ 31.263394] [ 31.263630] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.264544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.265622] Call Trace: [ 31.265966] [ 31.266287] dump_stack_lvl+0x91/0xf0 [ 31.266821] print_report+0xcc/0x620 [ 31.267333] ? __virt_addr_valid+0x102/0x340 [ 31.267950] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269302] kasan_report+0xbe/0xf0 [ 31.269801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270476] vma_interval_tree_remove+0xc75/0xec0 [ 31.271134] vma_prepare+0xc54/0x11a0 [ 31.271655] __split_vma+0x5af/0x950 [ 31.272161] ? __pfx___split_vma+0x10/0x10 [ 31.272748] ? find_held_lock+0x2c/0x110 [ 31.273312] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.273914] ? lock_is_held_type+0x9f/0x120 [ 31.274478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.275132] ? mtree_range_walk+0x632/0x900 [ 31.275767] ? mas_walk+0x5c7/0x7c0 [ 31.276289] do_vmi_munmap+0x1f1/0x2b0 [ 31.276835] mmap_region+0x1f9/0x2660 [ 31.277384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.277944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.278727] ? __pfx_lock_acquire+0x10/0x10 [ 31.279310] ? __pfx_mmap_region+0x10/0x10 [ 31.279892] ? security_mmap_addr+0x7d/0xa0 [ 31.280467] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281077] do_mmap+0x854/0xf00 [ 31.281550] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.282680] ksys_mmap_pgoff+0x3af/0x500 [ 31.283220] do_syscall_64+0x3f/0x90 [ 31.283730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284414] RIP: 0033:0x7f7611966d82 [ 31.284904] 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 [ 31.287162] RSP: 002b:00007fffe9cd5218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.288115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7611966d82 [ 31.289026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7610da0000 [ 31.289928] RBP: 00007f7610da0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.290862] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc6d32bb20 [ 31.291793] R13: 00007fffe9cd5230 R14: 00007fffe9cd5260 R15: 00007fffe9cd55c0 [ 31.292736] [ 31.293069] [ 31.293306] Allocated by task 213: [ 31.293778] kasan_save_stack+0x22/0x50 [ 31.294331] kasan_set_track+0x25/0x30 [ 31.294868] __kasan_slab_alloc+0x59/0x70 [ 31.295444] kmem_cache_alloc+0x16b/0x370 [ 31.296016] vm_area_dup+0x20/0x160 [ 31.296515] __split_vma+0x170/0x950 [ 31.297031] split_vma+0xc6/0x110 [ 31.297518] mprotect_fixup+0x8d2/0xb30 [ 31.298067] do_mprotect_pkey+0x87e/0xd40 [ 31.298639] __x64_sys_mprotect+0x78/0xc0 [ 31.299213] do_syscall_64+0x3f/0x90 [ 31.299736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300436] [ 31.300668] Freed by task 213: [ 31.301107] kasan_save_stack+0x22/0x50 [ 31.301655] kasan_set_track+0x25/0x30 [ 31.302191] kasan_save_free_info+0x2b/0x50 [ 31.302768] __kasan_slab_free+0x10a/0x190 [ 31.303345] kmem_cache_free+0x10d/0x4d0 [ 31.304019] rcu_core+0x8c8/0x2860 [ 31.304501] __do_softirq+0x1b7/0x7d4 [ 31.305035] [ 31.305265] Last potentially related work creation: [ 31.305904] kasan_save_stack+0x22/0x50 [ 31.306450] __kasan_record_aux_stack+0x8e/0xa0 [ 31.307078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.307777] remove_vma+0x139/0x170 [ 31.308267] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.308894] do_vmi_munmap+0x1f1/0x2b0 [ 31.309425] __vm_munmap+0x138/0x3a0 [ 31.309934] __x64_sys_munmap+0x59/0x80 [ 31.310474] do_syscall_64+0x3f/0x90 [ 31.310989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311682] [ 31.311912] The buggy address belongs to the object at ffff88800fb0a488 [ 31.311912] which belongs to the cache vm_area_struct of size 168 [ 31.313512] The buggy address is located 88 bytes inside of [ 31.313512] freed 168-byte region [ffff88800fb0a488, ffff88800fb0a530) [ 31.315035] [ 31.315270] The buggy address belongs to the physical page: [ 31.315988] page:000000001e32d6f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb0a [ 31.317169] memcg:ffff88800e077901 [ 31.317635] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.318327] page_type: 0xffffffff() [ 31.318810] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.319795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e077901 [ 31.320770] page dumped because: kasan: bad access detected [ 31.321504] [ 31.321734] Memory state around the buggy address: [ 31.322354] ffff88800fb0a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.323274] ffff88800fb0a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.324194] >ffff88800fb0a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.325114] ^ [ 31.325925] ffff88800fb0a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.326849] ffff88800fb0a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.327774] ================================================================== [ 31.328831] Disabling lock debugging due to kernel taint [ 33.603955] BUG: Bad rss-counter state mm:00000000791d266f type:MM_FILEPAGES val:33 [ 33.604825] BUG: Bad rss-counter state mm:00000000791d266f type:MM_ANONPAGES val:22 [ 34.140387] BUG: Bad rss-counter state mm:000000000f5f47e0 type:MM_FILEPAGES val:33 [ 34.141401] BUG: Bad rss-counter state mm:000000000f5f47e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27246' (ECDSA) to the list of known hosts. 2023/06/19 11:12:43 fuzzer started 2023/06/19 11:12:43 dialing manager at localhost:44161 2023/06/19 11:12:44 checking machine... 2023/06/19 11:12:44 checking revisions... [ 34.870890] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:12:44 testing simple program... [ 34.920297] cgroup: Unknown subsys name 'net' [ 34.964599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:12:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff814c07eb RCX=ffffffff864bb001 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff814c07eb RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016e53680 R15=ffff88800e5fb410 RIP=ffffffff811fc7a0 RFL=00000246 [---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 00007f8ec28e2700 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=00007ffec548f388 CR3=000000000f0ee000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32383236352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323832 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110011caf92 RSP=ffff888008e57c78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffffffff8560b520 R13=ffffffff81378294 R14=ffff88806cf35000 R15=ffff88801a10aa10 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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=00007f5d4ba74650 CR3=0000000016c8c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000