syzkaller login: [ 38.797665] BUG: Bad rss-counter state mm:0000000081e09f73 type:MM_FILEPAGES val:33 [ 38.798843] BUG: Bad rss-counter state mm:0000000081e09f73 type:MM_ANONPAGES val:22 [ 38.837475] ================================================================== [ 38.838503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.839485] Read of size 8 at addr ffff88800e2d1228 by task sshd/218 [ 38.840391] [ 38.840615] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.841594] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.842565] Call Trace: [ 38.842883] [ 38.843168] dump_stack_lvl+0x91/0xf0 [ 38.843797] print_report+0xcc/0x620 [ 38.844290] ? __virt_addr_valid+0x102/0x340 [ 38.844885] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.845625] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846288] kasan_report+0xbe/0xf0 [ 38.846831] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847544] vma_interval_tree_remove+0xc75/0xec0 [ 38.848247] vma_prepare+0xc54/0x11a0 [ 38.848790] __split_vma+0x5af/0x950 [ 38.849270] ? __pfx___split_vma+0x10/0x10 [ 38.849801] ? find_held_lock+0x2c/0x110 [ 38.850326] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.850895] ? lock_is_held_type+0x9f/0x120 [ 38.851451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.852053] ? mtree_range_walk+0x632/0x900 [ 38.852611] ? mas_walk+0x5c7/0x7c0 [ 38.853093] do_vmi_munmap+0x1f1/0x2b0 [ 38.853589] mmap_region+0x1f9/0x2660 [ 38.854076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.854588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.855295] ? __pfx_lock_acquire+0x10/0x10 [ 38.855830] ? __pfx_mmap_region+0x10/0x10 [ 38.856362] ? security_mmap_addr+0x7d/0xa0 [ 38.856896] ? get_unmapped_area+0x1f5/0x3f0 [ 38.857440] do_mmap+0x854/0xf00 [ 38.857885] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.858376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.858937] ksys_mmap_pgoff+0x3af/0x500 [ 38.859454] do_syscall_64+0x3f/0x90 [ 38.859939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860581] RIP: 0033:0x7f3c4c6c7d82 [ 38.861033] 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 [ 38.863168] RSP: 002b:00007ffff64de228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.864081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c4c6c7d82 [ 38.864927] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c4bb01000 [ 38.865770] RBP: 00007f3c4bb01000 R08: 0000000000000009 R09: 0000000000001000 [ 38.866614] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f362723ec0 [ 38.867470] R13: 00007ffff64de240 R14: 00007ffff64de270 R15: 00007ffff64de5d0 [ 38.868339] [ 38.868648] [ 38.868869] Allocated by task 211: [ 38.869313] kasan_save_stack+0x22/0x50 [ 38.869832] kasan_set_track+0x25/0x30 [ 38.870338] __kasan_slab_alloc+0x59/0x70 [ 38.870889] kmem_cache_alloc+0x16b/0x370 [ 38.871434] vm_area_dup+0x20/0x160 [ 38.871914] __split_vma+0x170/0x950 [ 38.872387] split_vma+0xc6/0x110 [ 38.872831] mprotect_fixup+0x8d2/0xb30 [ 38.873345] do_mprotect_pkey+0x87e/0xd40 [ 38.873868] __x64_sys_mprotect+0x78/0xc0 [ 38.874385] do_syscall_64+0x3f/0x90 [ 38.874865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875515] [ 38.875730] Freed by task 211: [ 38.876122] kasan_save_stack+0x22/0x50 [ 38.876626] kasan_set_track+0x25/0x30 [ 38.877118] kasan_save_free_info+0x2b/0x50 [ 38.877647] __kasan_slab_free+0x10a/0x190 [ 38.878190] kmem_cache_free+0x10d/0x4d0 [ 38.878777] rcu_core+0x8c8/0x2860 [ 38.879225] __do_softirq+0x1b7/0x7d4 [ 38.879720] [ 38.879933] Last potentially related work creation: [ 38.880512] kasan_save_stack+0x22/0x50 [ 38.881020] __kasan_record_aux_stack+0x8e/0xa0 [ 38.881594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.882240] remove_vma+0x139/0x170 [ 38.882685] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.883245] do_vmi_munmap+0x1f1/0x2b0 [ 38.883734] __vm_munmap+0x138/0x3a0 [ 38.884207] __x64_sys_munmap+0x59/0x80 [ 38.884703] do_syscall_64+0x3f/0x90 [ 38.885185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885864] [ 38.886074] Second to last potentially related work creation: [ 38.886767] kasan_save_stack+0x22/0x50 [ 38.887280] __kasan_record_aux_stack+0x8e/0xa0 [ 38.887862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.888513] remove_vma+0x139/0x170 [ 38.888970] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.889523] do_vmi_munmap+0x1f1/0x2b0 [ 38.890008] mmap_region+0x1f9/0x2660 [ 38.890494] do_mmap+0x854/0xf00 [ 38.890935] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.891444] ksys_mmap_pgoff+0x3af/0x500 [ 38.891960] do_syscall_64+0x3f/0x90 [ 38.892442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893097] [ 38.893315] The buggy address belongs to the object at ffff88800e2d11d0 [ 38.893315] which belongs to the cache vm_area_struct of size 168 [ 38.894784] The buggy address is located 88 bytes inside of [ 38.894784] freed 168-byte region [ffff88800e2d11d0, ffff88800e2d1278) [ 38.896248] [ 38.896469] The buggy address belongs to the physical page: [ 38.897136] page:0000000015cb92e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d1 [ 38.898263] memcg:ffff88800e46ef01 [ 38.898708] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.899360] page_type: 0xffffffff() [ 38.899836] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.900794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e46ef01 [ 38.901707] page dumped because: kasan: bad access detected [ 38.902381] [ 38.902596] Memory state around the buggy address: [ 38.903177] ffff88800e2d1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.904048] ffff88800e2d1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.904901] >ffff88800e2d1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.905807] ^ [ 38.906362] ffff88800e2d1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.907213] ffff88800e2d1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.908091] ================================================================== [ 38.909147] Disabling lock debugging due to kernel taint [ 40.968097] BUG: Bad rss-counter state mm:00000000b8a52af2 type:MM_FILEPAGES val:33 [ 40.969264] BUG: Bad rss-counter state mm:00000000b8a52af2 type:MM_ANONPAGES val:22 [ 41.341378] BUG: Bad rss-counter state mm:0000000047b995e3 type:MM_FILEPAGES val:33 [ 41.342140] BUG: Bad rss-counter state mm:0000000047b995e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9411' (ECDSA) to the list of known hosts. 2023/06/21 01:51:19 fuzzer started 2023/06/21 01:51:19 dialing manager at localhost:36067 2023/06/21 01:51:19 checking machine... 2023/06/21 01:51:19 checking revisions... [ 42.010799] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:51:19 testing simple program... [ 42.058311] cgroup: Unknown subsys name 'net' [ 42.120092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:51:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd93163538 CR3=0000000005482000 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=00007fb92e49c51000005599eeb21790 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 info registers vcpu 1 RAX=ffffffffffffffd0 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86098094 RBP=ffff88800cbb77f8 RSP=ffff88800cbb76e0 R8 =0000000000000001 R9 =ffff88800cbb77e0 R10=0000000000038001 R11=0000000000006097 R12=ffff88800cbb7800 R13=ffff88800cbb77e8 R14=ffff88800cbb77a0 R15=ffff88800cbb77a0 RIP=ffffffff8113120f 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 00007f3176143900 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=00007f31766fb0b0 CR3=000000000efbc000 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=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