syzkaller login: [ 38.651548] BUG: Bad rss-counter state mm:000000006f8d5cd6 type:MM_FILEPAGES val:33 [ 38.652106] BUG: Bad rss-counter state mm:000000006f8d5cd6 type:MM_ANONPAGES val:22 [ 38.817443] ================================================================== [ 38.818458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.819191] Read of size 8 at addr ffff88800de98968 by task sshd/224 [ 38.819790] [ 38.819936] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.820476] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.821089] Call Trace: [ 38.821296] [ 38.821476] dump_stack_lvl+0x91/0xf0 [ 38.821793] print_report+0xcc/0x620 [ 38.822109] ? __virt_addr_valid+0x102/0x340 [ 38.822497] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.822883] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.823254] kasan_report+0xbe/0xf0 [ 38.823551] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.823931] vma_interval_tree_remove+0xc75/0xec0 [ 38.824303] vma_prepare+0xc54/0x11a0 [ 38.824602] __split_vma+0x5af/0x950 [ 38.824911] ? __pfx___split_vma+0x10/0x10 [ 38.825255] ? find_held_lock+0x2c/0x110 [ 38.825587] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.825950] ? lock_is_held_type+0x9f/0x120 [ 38.826305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.826691] ? mtree_range_walk+0x632/0x900 [ 38.827045] ? mas_walk+0x5c7/0x7c0 [ 38.827352] do_vmi_munmap+0x1f1/0x2b0 [ 38.827676] mmap_region+0x1f9/0x2660 [ 38.827990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.828319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.828772] ? __pfx_lock_acquire+0x10/0x10 [ 38.829114] ? __pfx_mmap_region+0x10/0x10 [ 38.829458] ? security_mmap_addr+0x7d/0xa0 [ 38.829795] ? get_unmapped_area+0x1f5/0x3f0 [ 38.830132] do_mmap+0x854/0xf00 [ 38.830527] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.830834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.831186] ksys_mmap_pgoff+0x3af/0x500 [ 38.831509] do_syscall_64+0x3f/0x90 [ 38.831826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.832289] RIP: 0033:0x7f73624fbd82 [ 38.832571] 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 [ 38.833889] RSP: 002b:00007ffc58e77a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.834534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73624fbd82 [ 38.835122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7361935000 [ 38.835635] RBP: 00007f7361935000 R08: 0000000000000009 R09: 0000000000001000 [ 38.836189] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558496499ec0 [ 38.836706] R13: 00007ffc58e77a40 R14: 00007ffc58e77a70 R15: 00007ffc58e77dd0 [ 38.837282] [ 38.837467] [ 38.837600] Allocated by task 216: [ 38.837886] kasan_save_stack+0x22/0x50 [ 38.838204] kasan_set_track+0x25/0x30 [ 38.846569] __kasan_slab_alloc+0x59/0x70 [ 38.846947] kmem_cache_alloc+0x16b/0x370 [ 38.847277] vm_area_dup+0x20/0x160 [ 38.847570] __split_vma+0x170/0x950 [ 38.847875] split_vma+0xc6/0x110 [ 38.848158] mprotect_fixup+0x8d2/0xb30 [ 38.848472] do_mprotect_pkey+0x87e/0xd40 [ 38.848805] __x64_sys_mprotect+0x78/0xc0 [ 38.849148] do_syscall_64+0x3f/0x90 [ 38.849476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854522] [ 38.854663] Freed by task 207: [ 38.854914] kasan_save_stack+0x22/0x50 [ 38.855239] kasan_set_track+0x25/0x30 [ 38.858358] kasan_save_free_info+0x2b/0x50 [ 38.858709] __kasan_slab_free+0x10a/0x190 [ 38.859036] kmem_cache_free+0x10d/0x4d0 [ 38.859359] rcu_core+0x8c8/0x2860 [ 38.859625] __do_softirq+0x1b7/0x7d4 [ 38.859930] [ 38.860074] Last potentially related work creation: [ 38.860444] kasan_save_stack+0x22/0x50 [ 38.860755] __kasan_record_aux_stack+0x8e/0xa0 [ 38.861133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.861548] remove_vma+0x139/0x170 [ 38.861836] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.862197] do_vmi_munmap+0x1f1/0x2b0 [ 38.866518] __vm_munmap+0x138/0x3a0 [ 38.866807] __x64_sys_munmap+0x59/0x80 [ 38.867118] do_syscall_64+0x3f/0x90 [ 38.867413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867813] [ 38.867953] Second to last potentially related work creation: [ 38.868370] kasan_save_stack+0x22/0x50 [ 38.868691] __kasan_record_aux_stack+0x8e/0xa0 [ 38.869053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.869461] remove_vma+0x139/0x170 [ 38.869749] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.870112] do_vmi_munmap+0x1f1/0x2b0 [ 38.870556] mmap_region+0x1f9/0x2660 [ 38.870854] do_mmap+0x854/0xf00 [ 38.871131] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.871438] ksys_mmap_pgoff+0x3af/0x500 [ 38.871756] do_syscall_64+0x3f/0x90 [ 38.872045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872445] [ 38.872582] The buggy address belongs to the object at ffff88800de98910 [ 38.872582] which belongs to the cache vm_area_struct of size 168 [ 38.873542] The buggy address is located 88 bytes inside of [ 38.873542] freed 168-byte region [ffff88800de98910, ffff88800de989b8) [ 38.874583] [ 38.874719] The buggy address belongs to the physical page: [ 38.875168] page:0000000040343231 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde98 [ 38.875803] memcg:ffff88800db2fc01 [ 38.876058] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.876512] page_type: 0xffffffff() [ 38.876809] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390000 dead000000000005 [ 38.877390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db2fc01 [ 38.877952] page dumped because: kasan: bad access detected [ 38.878394] [ 38.878540] Memory state around the buggy address: [ 38.878911] ffff88800de98800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.879426] ffff88800de98880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.879971] >ffff88800de98900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.880503] ^ [ 38.880991] ffff88800de98980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.881545] ffff88800de98a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.882082] ================================================================== [ 38.882727] Disabling lock debugging due to kernel taint [ 41.898503] BUG: Bad rss-counter state mm:000000001b037458 type:MM_FILEPAGES val:33 [ 41.899192] BUG: Bad rss-counter state mm:000000001b037458 type:MM_ANONPAGES val:22 [ 42.377880] BUG: Bad rss-counter state mm:00000000396a3404 type:MM_FILEPAGES val:33 [ 42.378565] BUG: Bad rss-counter state mm:00000000396a3404 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1988' (ECDSA) to the list of known hosts. 2023/06/21 10:08:37 fuzzer started 2023/06/21 10:08:37 dialing manager at localhost:36067 2023/06/21 10:08:37 checking machine... 2023/06/21 10:08:37 checking revisions... [ 43.283688] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:08:37 testing simple program... [ 43.374174] cgroup: Unknown subsys name 'net' [ 43.510260] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:08:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88800cbf7af0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100197ef5f RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f8b50fe5900 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=00007f67893c6328 CR3=0000000018238000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff84536871 RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88801669fa50 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002cd3f4b RIP=ffffffff84536879 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=00007ffd8248c748 CR3=0000000005482000 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=00007f753d76b51000005629a43b9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000