syzkaller login: [ 30.772506] BUG: Bad rss-counter state mm:000000006578e9f0 type:MM_FILEPAGES val:33 [ 30.773620] BUG: Bad rss-counter state mm:000000006578e9f0 type:MM_ANONPAGES val:22 [ 30.939214] ================================================================== [ 30.940365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.941478] Read of size 8 at addr ffff88801a3c1880 by task sshd/219 [ 30.942557] [ 30.942779] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.943649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944698] Call Trace: [ 30.945019] [ 30.945308] dump_stack_lvl+0x91/0xf0 [ 30.945798] print_report+0xcc/0x620 [ 30.946292] ? __virt_addr_valid+0x102/0x340 [ 30.946839] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947470] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948131] kasan_report+0xbe/0xf0 [ 30.948618] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949249] vma_interval_tree_remove+0xc75/0xec0 [ 30.949855] vma_prepare+0xc54/0x11a0 [ 30.950333] __split_vma+0x5af/0x950 [ 30.950813] ? __pfx___split_vma+0x10/0x10 [ 30.951349] ? find_held_lock+0x2c/0x110 [ 30.951873] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952508] ? lock_is_held_type+0x9f/0x120 [ 30.953046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953685] ? mtree_range_walk+0x632/0x900 [ 30.954242] ? mas_walk+0x5c7/0x7c0 [ 30.954727] do_vmi_munmap+0x1f1/0x2b0 [ 30.955222] mmap_region+0x1f9/0x2660 [ 30.955718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.956300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.957017] ? __pfx_lock_acquire+0x10/0x10 [ 30.957549] ? __pfx_mmap_region+0x10/0x10 [ 30.958080] ? security_mmap_addr+0x7d/0xa0 [ 30.958610] ? get_unmapped_area+0x1f5/0x3f0 [ 30.959162] do_mmap+0x854/0xf00 [ 30.959606] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.960161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.960735] ksys_mmap_pgoff+0x3af/0x500 [ 30.961246] do_syscall_64+0x3f/0x90 [ 30.961730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.962386] RIP: 0033:0x7fa25c7dbd82 [ 30.962849] 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 [ 30.965013] RSP: 002b:00007ffcfaa48078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.965913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa25c7dbd82 [ 30.966763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa25bc15000 [ 30.967607] RBP: 00007fa25bc15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.968506] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d4be67ec0 [ 30.969362] R13: 00007ffcfaa48090 R14: 00007ffcfaa480c0 R15: 00007ffcfaa48420 [ 30.970220] [ 30.970517] [ 30.970735] Allocated by task 212: [ 30.971174] kasan_save_stack+0x22/0x50 [ 30.971682] kasan_set_track+0x25/0x30 [ 30.972232] __kasan_slab_alloc+0x59/0x70 [ 30.972757] kmem_cache_alloc+0x16b/0x370 [ 30.973278] vm_area_dup+0x20/0x160 [ 30.973730] __split_vma+0x170/0x950 [ 30.974197] split_vma+0xc6/0x110 [ 30.974638] mprotect_fixup+0x8d2/0xb30 [ 30.975143] do_mprotect_pkey+0x87e/0xd40 [ 30.975671] __x64_sys_mprotect+0x78/0xc0 [ 30.976244] do_syscall_64+0x3f/0x90 [ 30.976729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977378] [ 30.977596] Freed by task 212: [ 30.977990] kasan_save_stack+0x22/0x50 [ 30.978492] kasan_set_track+0x25/0x30 [ 30.978987] kasan_save_free_info+0x2b/0x50 [ 30.979517] __kasan_slab_free+0x10a/0x190 [ 30.980074] kmem_cache_free+0x10d/0x4d0 [ 30.980639] rcu_core+0x8c8/0x2860 [ 30.981084] __do_softirq+0x1b7/0x7d4 [ 30.981562] [ 30.981779] Last potentially related work creation: [ 30.982366] kasan_save_stack+0x22/0x50 [ 30.982953] __kasan_record_aux_stack+0x8e/0xa0 [ 30.983532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.984239] remove_vma+0x139/0x170 [ 30.984693] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.985254] do_vmi_munmap+0x1f1/0x2b0 [ 30.985751] __vm_munmap+0x138/0x3a0 [ 30.986219] __x64_sys_munmap+0x59/0x80 [ 30.986719] do_syscall_64+0x3f/0x90 [ 30.987191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987841] [ 30.988089] The buggy address belongs to the object at ffff88801a3c1828 [ 30.988089] which belongs to the cache vm_area_struct of size 168 [ 30.989599] The buggy address is located 88 bytes inside of [ 30.989599] freed 168-byte region [ffff88801a3c1828, ffff88801a3c18d0) [ 30.991036] [ 30.991256] The buggy address belongs to the physical page: [ 30.991910] page:00000000c066e83e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3c1 [ 30.993043] memcg:ffff88801a3c2001 [ 30.993476] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994127] page_type: 0xffffffff() [ 30.994578] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.995493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3c2001 [ 30.996446] page dumped because: kasan: bad access detected [ 30.997114] [ 30.997333] Memory state around the buggy address: [ 30.997912] ffff88801a3c1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.998762] ffff88801a3c1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.999620] >ffff88801a3c1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.000536] ^ [ 31.000946] ffff88801a3c1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001800] ffff88801a3c1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.002645] ================================================================== [ 31.003600] Disabling lock debugging due to kernel taint [ 33.079572] BUG: Bad rss-counter state mm:0000000045bd6f2a type:MM_FILEPAGES val:33 [ 33.080751] BUG: Bad rss-counter state mm:0000000045bd6f2a type:MM_ANONPAGES val:22 [ 33.612747] BUG: Bad rss-counter state mm:000000005366b0c9 type:MM_FILEPAGES val:33 [ 33.613889] BUG: Bad rss-counter state mm:000000005366b0c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14038' (ECDSA) to the list of known hosts. 2023/06/19 20:13:37 fuzzer started 2023/06/19 20:13:37 dialing manager at localhost:44161 2023/06/19 20:13:37 checking machine... 2023/06/19 20:13:37 checking revisions... [ 34.252882] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:13:37 testing simple program... [ 34.304942] cgroup: Unknown subsys name 'net' [ 34.355866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:13:36 Registers: info registers vcpu 0 RAX=ffff88806ce02000 RBX=ffff88806ce09b30 RCX=0000000000000001 RDX=ffff88806ce0a000 RSI=ffff88806ce09b30 RDI=ffff88806ce09aa8 RBP=dffffc0000000000 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffed100d9c1355 R13=ffffed100d9c1354 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81132fc3 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 00007f210fb07900 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=00007f21100be618 CR3=000000000ef44000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f87fb2f4fc0 CR3=000000000cb56000 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=660344e4edbe65bd9f4e3b04a0b2137f XMM02=ec2efd57dc4c00df00000000001217b8 XMM03=d69df7e5606b1cd70000000000121888 XMM04=3d8dc57f5ec98cfe00000000000ae988 XMM05=dfcdbad4f1609c370000000000134c78 XMM06=1d52fe5b00c8738c0000000000133ae0 XMM07=e042d86d42eb936e0000000000125378 XMM08=d69df7e5606b1cd70000000000121888 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000