syzkaller login: [ 40.107010] BUG: Bad rss-counter state mm:00000000ae496bd1 type:MM_FILEPAGES val:33 [ 40.108415] BUG: Bad rss-counter state mm:00000000ae496bd1 type:MM_ANONPAGES val:22 [ 40.258684] ================================================================== [ 40.259605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.260553] Read of size 8 at addr ffff888019cc4c20 by task sshd/220 [ 40.261430] [ 40.261654] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.262537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.263509] Call Trace: [ 40.263827] [ 40.264111] dump_stack_lvl+0x91/0xf0 [ 40.264599] print_report+0xcc/0x620 [ 40.265115] ? __virt_addr_valid+0x102/0x340 [ 40.265674] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.266300] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.266923] kasan_report+0xbe/0xf0 [ 40.267404] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.268036] vma_interval_tree_remove+0xc75/0xec0 [ 40.268648] vma_prepare+0xc54/0x11a0 [ 40.269135] __split_vma+0x5af/0x950 [ 40.269610] ? __pfx___split_vma+0x10/0x10 [ 40.270140] ? find_held_lock+0x2c/0x110 [ 40.270670] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.271238] ? lock_is_held_type+0x9f/0x120 [ 40.271779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.272392] ? mtree_range_walk+0x632/0x900 [ 40.272957] ? mas_walk+0x5c7/0x7c0 [ 40.273448] do_vmi_munmap+0x1f1/0x2b0 [ 40.273948] mmap_region+0x1f9/0x2660 [ 40.274433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.274950] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.275675] ? __pfx_lock_acquire+0x10/0x10 [ 40.276212] ? __pfx_mmap_region+0x10/0x10 [ 40.276765] ? security_mmap_addr+0x7d/0xa0 [ 40.277298] ? get_unmapped_area+0x1f5/0x3f0 [ 40.277853] do_mmap+0x854/0xf00 [ 40.278292] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.278799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.279361] ksys_mmap_pgoff+0x3af/0x500 [ 40.279873] do_syscall_64+0x3f/0x90 [ 40.280353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.281018] RIP: 0033:0x7f03891a9d82 [ 40.281476] 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 [ 40.283597] RSP: 002b:00007fff5c3c6698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.284524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03891a9d82 [ 40.285405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03885e3000 [ 40.286275] RBP: 00007f03885e3000 R08: 0000000000000009 R09: 0000000000001000 [ 40.287128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e63b52eec0 [ 40.287996] R13: 00007fff5c3c66b0 R14: 00007fff5c3c66e0 R15: 00007fff5c3c6a40 [ 40.288872] [ 40.289172] [ 40.289390] Allocated by task 213: [ 40.289817] kasan_save_stack+0x22/0x50 [ 40.290339] kasan_set_track+0x25/0x30 [ 40.290837] __kasan_slab_alloc+0x59/0x70 [ 40.291362] kmem_cache_alloc+0x16b/0x370 [ 40.291897] vm_area_dup+0x20/0x160 [ 40.292357] __split_vma+0x170/0x950 [ 40.292832] split_vma+0xc6/0x110 [ 40.293279] mprotect_fixup+0x8d2/0xb30 [ 40.293800] do_mprotect_pkey+0x87e/0xd40 [ 40.294344] __x64_sys_mprotect+0x78/0xc0 [ 40.294884] do_syscall_64+0x3f/0x90 [ 40.295375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.296039] [ 40.296261] Freed by task 213: [ 40.296692] kasan_save_stack+0x22/0x50 [ 40.297215] kasan_set_track+0x25/0x30 [ 40.297733] kasan_save_free_info+0x2b/0x50 [ 40.298283] __kasan_slab_free+0x10a/0x190 [ 40.298835] kmem_cache_free+0x10d/0x4d0 [ 40.299358] rcu_core+0x8c8/0x2860 [ 40.299823] __do_softirq+0x1b7/0x7d4 [ 40.300320] [ 40.300540] Last potentially related work creation: [ 40.301167] kasan_save_stack+0x22/0x50 [ 40.301688] __kasan_record_aux_stack+0x8e/0xa0 [ 40.302285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.302947] remove_vma+0x139/0x170 [ 40.303423] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.304004] do_vmi_munmap+0x1f1/0x2b0 [ 40.304516] __vm_munmap+0x138/0x3a0 [ 40.305009] __x64_sys_munmap+0x59/0x80 [ 40.305536] do_syscall_64+0x3f/0x90 [ 40.306037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.306717] [ 40.306942] The buggy address belongs to the object at ffff888019cc4bc8 [ 40.306942] which belongs to the cache vm_area_struct of size 168 [ 40.308481] The buggy address is located 88 bytes inside of [ 40.308481] freed 168-byte region [ffff888019cc4bc8, ffff888019cc4c70) [ 40.309983] [ 40.310206] The buggy address belongs to the physical page: [ 40.310899] page:00000000103503d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cc4 [ 40.312043] memcg:ffff888009a7a001 [ 40.312492] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.313181] page_type: 0xffffffff() [ 40.313652] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.314619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a7a001 [ 40.315577] page dumped because: kasan: bad access detected [ 40.316269] [ 40.316491] Memory state around the buggy address: [ 40.317116] ffff888019cc4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.318026] ffff888019cc4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.318930] >ffff888019cc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.319827] ^ [ 40.320378] ffff888019cc4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.321277] ffff888019cc4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.322168] ================================================================== [ 40.323252] Disabling lock debugging due to kernel taint [ 42.879174] BUG: Bad rss-counter state mm:00000000913d9d25 type:MM_FILEPAGES val:33 [ 42.880810] BUG: Bad rss-counter state mm:00000000913d9d25 type:MM_ANONPAGES val:22 [ 43.280972] BUG: Bad rss-counter state mm:00000000994f71f3 type:MM_FILEPAGES val:33 [ 43.282126] BUG: Bad rss-counter state mm:00000000994f71f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1665' (ECDSA) to the list of known hosts. 2023/06/19 20:58:49 fuzzer started 2023/06/19 20:58:49 dialing manager at localhost:44161 2023/06/19 20:58:49 checking machine... 2023/06/19 20:58:49 checking revisions... [ 43.794297] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:58:49 testing simple program... [ 43.824330] cgroup: Unknown subsys name 'net' [ 43.877276] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:48 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000003 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8182839d RBP=ffff88806ce361a0 RSP=ffff88806ce09d70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffff88806ce361c8 R14=0000000000000003 R15=ffff888009c94000 RIP=ffffffff8450b936 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 00007f43805cf900 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=00007f4380b84650 CR3=00000000198d6000 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=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=00007f6e81c00338 CR3=000000000e462000 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=2039343a38353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000