syzkaller login: [ 31.184126] BUG: Bad rss-counter state mm:000000001adcbdf9 type:MM_FILEPAGES val:33 [ 31.185428] BUG: Bad rss-counter state mm:000000001adcbdf9 type:MM_ANONPAGES val:22 [ 31.317197] ================================================================== [ 31.318306] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.319441] Read of size 8 at addr ffff88800c6cc968 by task sshd/220 [ 31.320530] [ 31.320792] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.321820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.323035] Call Trace: [ 31.323399] [ 31.323693] dump_stack_lvl+0x91/0xf0 [ 31.324192] print_report+0xcc/0x620 [ 31.324684] ? __virt_addr_valid+0x102/0x340 [ 31.325240] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.326534] kasan_report+0xbe/0xf0 [ 31.327032] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327666] vma_interval_tree_remove+0xc75/0xec0 [ 31.328270] vma_prepare+0xc54/0x11a0 [ 31.328769] __split_vma+0x5af/0x950 [ 31.329248] ? __pfx___split_vma+0x10/0x10 [ 31.329781] ? find_held_lock+0x2c/0x110 [ 31.330325] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.330895] ? lock_is_held_type+0x9f/0x120 [ 31.331444] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.332053] ? mtree_range_walk+0x632/0x900 [ 31.332607] ? mas_walk+0x5c7/0x7c0 [ 31.333087] do_vmi_munmap+0x1f1/0x2b0 [ 31.333581] mmap_region+0x1f9/0x2660 [ 31.334067] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.334612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.335332] ? __pfx_lock_acquire+0x10/0x10 [ 31.335877] ? __pfx_mmap_region+0x10/0x10 [ 31.336417] ? security_mmap_addr+0x7d/0xa0 [ 31.336957] ? get_unmapped_area+0x1f5/0x3f0 [ 31.337516] do_mmap+0x854/0xf00 [ 31.337957] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.338464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.339034] ksys_mmap_pgoff+0x3af/0x500 [ 31.339551] do_syscall_64+0x3f/0x90 [ 31.340039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340694] RIP: 0033:0x7f8bbc0f5d82 [ 31.341156] 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 [ 31.343300] RSP: 002b:00007ffee9a0af38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.344211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bbc0f5d82 [ 31.345088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8bbb52f000 [ 31.345974] RBP: 00007f8bbb52f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.346861] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557777fccf70 [ 31.347733] R13: 00007ffee9a0af50 R14: 00007ffee9a0af80 R15: 00007ffee9a0b2e0 [ 31.348631] [ 31.348926] [ 31.349150] Allocated by task 213: [ 31.349585] kasan_save_stack+0x22/0x50 [ 31.350101] kasan_set_track+0x25/0x30 [ 31.350617] __kasan_slab_alloc+0x59/0x70 [ 31.351143] kmem_cache_alloc+0x16b/0x370 [ 31.351684] vm_area_dup+0x20/0x160 [ 31.352140] __split_vma+0x170/0x950 [ 31.352615] split_vma+0xc6/0x110 [ 31.353061] mprotect_fixup+0x8d2/0xb30 [ 31.353570] do_mprotect_pkey+0x87e/0xd40 [ 31.354093] __x64_sys_mprotect+0x78/0xc0 [ 31.354626] do_syscall_64+0x3f/0x90 [ 31.355109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.355765] [ 31.355983] Freed by task 213: [ 31.356380] kasan_save_stack+0x22/0x50 [ 31.356888] kasan_set_track+0x25/0x30 [ 31.357382] kasan_save_free_info+0x2b/0x50 [ 31.357916] __kasan_slab_free+0x10a/0x190 [ 31.358461] kmem_cache_free+0x10d/0x4d0 [ 31.358979] rcu_core+0x8c8/0x2860 [ 31.359432] __do_softirq+0x1b7/0x7d4 [ 31.359921] [ 31.360141] Last potentially related work creation: [ 31.360728] kasan_save_stack+0x22/0x50 [ 31.361242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.361891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.362562] remove_vma+0x139/0x170 [ 31.363025] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.363597] do_vmi_munmap+0x1f1/0x2b0 [ 31.364087] __vm_munmap+0x138/0x3a0 [ 31.364566] __x64_sys_munmap+0x59/0x80 [ 31.365063] do_syscall_64+0x3f/0x90 [ 31.365545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366204] [ 31.366425] The buggy address belongs to the object at ffff88800c6cc910 [ 31.366425] which belongs to the cache vm_area_struct of size 168 [ 31.367922] The buggy address is located 88 bytes inside of [ 31.367922] freed 168-byte region [ffff88800c6cc910, ffff88800c6cc9b8) [ 31.369366] [ 31.369585] The buggy address belongs to the physical page: [ 31.370271] page:00000000c1944739 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6cc [ 31.371357] memcg:ffff88800daebd01 [ 31.371784] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.372440] page_type: 0xffffffff() [ 31.372892] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b1fc0 dead000000000004 [ 31.373823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daebd01 [ 31.374745] page dumped because: kasan: bad access detected [ 31.375409] [ 31.375629] Memory state around the buggy address: [ 31.376212] ffff88800c6cc800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.377078] ffff88800c6cc880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.377950] >ffff88800c6cc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.378819] ^ [ 31.379602] ffff88800c6cc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.380462] ffff88800c6cca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.381326] ================================================================== [ 31.382262] Disabling lock debugging due to kernel taint [ 33.829022] BUG: Bad rss-counter state mm:00000000b304e931 type:MM_FILEPAGES val:33 [ 33.830041] BUG: Bad rss-counter state mm:00000000b304e931 type:MM_ANONPAGES val:22 [ 34.341016] BUG: Bad rss-counter state mm:00000000b860dc5c type:MM_FILEPAGES val:33 [ 34.342055] BUG: Bad rss-counter state mm:00000000b860dc5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57484' (ECDSA) to the list of known hosts. 2023/06/20 13:31:48 fuzzer started 2023/06/20 13:31:48 dialing manager at localhost:36067 2023/06/20 13:31:48 checking machine... 2023/06/20 13:31:48 checking revisions... [ 35.032732] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:31:49 testing simple program... [ 35.074598] cgroup: Unknown subsys name 'net' [ 35.120356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=ffff888016f59b40 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=00007f902f1ae20c RSP=ffff8880181df3e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f902f1ae20c R13=0000000000000000 R14=ffff888016f59b40 R15=0000000000092cc0 RIP=ffffffff8135bd4f RFL=00000293 [--S-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 00007f902ecbb900 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=00007f902f270650 CR3=000000000f150000 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=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e60 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a10 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf02000 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff811304d1 RFL=00000282 [--S----] 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=00007fbf75732470 CR3=00000000141de000 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=94092e3c62d569a48a4646cb7727dbb2 XMM02=000000000011bfa0eff9b2d0a8fce9cb XMM03=000000000011c0702c67c8bc2e329bc3 XMM04=fa2db1463841fa2400000000000ae988 XMM05=19e9129bd510f2350000000000131e58 XMM06=4fda316b135da52b0000000000131ce0 XMM07=e042d86d42eb936e0000000000122510 XMM08=b69496a645054d7d000000000011c070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000