syzkaller login: [ 31.089291] BUG: Bad rss-counter state mm:00000000470cafb4 type:MM_FILEPAGES val:33 [ 31.090683] BUG: Bad rss-counter state mm:00000000470cafb4 type:MM_ANONPAGES val:22 [ 31.235017] ================================================================== [ 31.235926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.236877] Read of size 8 at addr ffff888016bb3140 by task sshd/219 [ 31.237635] [ 31.237871] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.238831] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.239816] Call Trace: [ 31.240140] [ 31.240429] dump_stack_lvl+0x91/0xf0 [ 31.240934] print_report+0xcc/0x620 [ 31.241423] ? __virt_addr_valid+0x102/0x340 [ 31.242012] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243241] kasan_report+0xbe/0xf0 [ 31.243725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244348] vma_interval_tree_remove+0xc75/0xec0 [ 31.244944] vma_prepare+0xc54/0x11a0 [ 31.245438] __split_vma+0x5af/0x950 [ 31.245935] ? __pfx___split_vma+0x10/0x10 [ 31.246472] ? find_held_lock+0x2c/0x110 [ 31.246996] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247568] ? lock_is_held_type+0x9f/0x120 [ 31.248112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248727] ? mtree_range_walk+0x632/0x900 [ 31.249281] ? mas_walk+0x5c7/0x7c0 [ 31.249774] do_vmi_munmap+0x1f1/0x2b0 [ 31.250269] mmap_region+0x1f9/0x2660 [ 31.250749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.251974] ? __pfx_lock_acquire+0x10/0x10 [ 31.252500] ? __pfx_mmap_region+0x10/0x10 [ 31.253029] ? security_mmap_addr+0x7d/0xa0 [ 31.253563] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254137] do_mmap+0x854/0xf00 [ 31.254582] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255641] ksys_mmap_pgoff+0x3af/0x500 [ 31.256145] do_syscall_64+0x3f/0x90 [ 31.256628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257285] RIP: 0033:0x7fabc06d0d82 [ 31.257742] 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 [ 31.259915] RSP: 002b:00007ffd874e6bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.260831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabc06d0d82 [ 31.261694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabbfb0a000 [ 31.262565] RBP: 00007fabbfb0a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263412] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e82816f70 [ 31.264257] R13: 00007ffd874e6bd0 R14: 00007ffd874e6c00 R15: 00007ffd874e6f60 [ 31.265148] [ 31.265441] [ 31.265656] Allocated by task 212: [ 31.266098] kasan_save_stack+0x22/0x50 [ 31.266608] kasan_set_track+0x25/0x30 [ 31.267101] __kasan_slab_alloc+0x59/0x70 [ 31.267618] kmem_cache_alloc+0x16b/0x370 [ 31.268134] vm_area_dup+0x20/0x160 [ 31.268590] __split_vma+0x170/0x950 [ 31.269052] split_vma+0xc6/0x110 [ 31.269494] mprotect_fixup+0x8d2/0xb30 [ 31.270007] do_mprotect_pkey+0x87e/0xd40 [ 31.270536] __x64_sys_mprotect+0x78/0xc0 [ 31.271056] do_syscall_64+0x3f/0x90 [ 31.271539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272187] [ 31.272404] Freed by task 212: [ 31.272794] kasan_save_stack+0x22/0x50 [ 31.273300] kasan_set_track+0x25/0x30 [ 31.273815] kasan_save_free_info+0x2b/0x50 [ 31.274350] __kasan_slab_free+0x10a/0x190 [ 31.274879] kmem_cache_free+0x10d/0x4d0 [ 31.275389] rcu_core+0x8c8/0x2860 [ 31.275833] __do_softirq+0x1b7/0x7d4 [ 31.276308] [ 31.276522] Last potentially related work creation: [ 31.277114] kasan_save_stack+0x22/0x50 [ 31.277618] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.278844] remove_vma+0x139/0x170 [ 31.279296] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.279857] do_vmi_munmap+0x1f1/0x2b0 [ 31.280350] __vm_munmap+0x138/0x3a0 [ 31.280815] __x64_sys_munmap+0x59/0x80 [ 31.281308] do_syscall_64+0x3f/0x90 [ 31.281795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282438] [ 31.282653] The buggy address belongs to the object at ffff888016bb30e8 [ 31.282653] which belongs to the cache vm_area_struct of size 168 [ 31.284132] The buggy address is located 88 bytes inside of [ 31.284132] freed 168-byte region [ffff888016bb30e8, ffff888016bb3190) [ 31.285549] [ 31.285769] The buggy address belongs to the physical page: [ 31.286435] page:00000000cf95f477 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bb3 [ 31.287540] memcg:ffff88800cb0f601 [ 31.287968] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288612] page_type: 0xffffffff() [ 31.289065] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.290003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb0f601 [ 31.290905] page dumped because: kasan: bad access detected [ 31.291572] [ 31.291787] Memory state around the buggy address: [ 31.292373] ffff888016bb3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.293239] ffff888016bb3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.294112] >ffff888016bb3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.294964] ^ [ 31.295602] ffff888016bb3180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.296467] ffff888016bb3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.297323] ================================================================== [ 31.298659] Disabling lock debugging due to kernel taint [ 33.767554] sshd (219) used greatest stack depth: 24120 bytes left [ 33.769252] BUG: Bad rss-counter state mm:00000000de86aba1 type:MM_FILEPAGES val:33 [ 33.770130] BUG: Bad rss-counter state mm:00000000de86aba1 type:MM_ANONPAGES val:22 [ 34.217235] BUG: Bad rss-counter state mm:0000000017024dce type:MM_FILEPAGES val:33 [ 34.218224] BUG: Bad rss-counter state mm:0000000017024dce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55594' (ECDSA) to the list of known hosts. 2023/06/20 15:38:44 fuzzer started 2023/06/20 15:38:45 dialing manager at localhost:36067 2023/06/20 15:38:45 checking machine... 2023/06/20 15:38:45 checking revisions... [ 34.962543] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:38:45 testing simple program... [ 35.010889] cgroup: Unknown subsys name 'net' [ 35.047252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:44 Registers: info registers vcpu 0 RAX=1ffffffff0bc0764 RBX=ffffffff85e03b24 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b24 RSP=ffff8880165b75e0 R8 =ffffffff86141712 R9 =ffff8880165b76d8 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b24 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f39c131c900 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=00007f39c18d40b0 CR3=000000000ebf4000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88806cf09e58 RSP=ffff88806cf09e58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800d9611b0 RIP=ffffffff81809aee RFL=00000202 [-------] 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=00007f9fadba5bb0 CR3=000000000daa4000 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=ae2073636e7bfca45e43c31cf38ca95b XMM02=ec2efd57dc4c00df000000000011a748 XMM03=512c8fb08b8fd853000000000011a818 XMM04=d340b703fa13197000000000000ae988 XMM05=dfcdbad4f1609c370000000000131c18 XMM06=b0060b9da19caf7b00000000001308c8 XMM07=e042d86d42eb936e0000000000121f10 XMM08=512c8fb08b8fd853000000000011a818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000