syzkaller login: [ 34.633459] BUG: Bad rss-counter state mm:000000007f65610f type:MM_FILEPAGES val:33 [ 34.634422] BUG: Bad rss-counter state mm:000000007f65610f type:MM_ANONPAGES val:22 [ 34.795745] ================================================================== [ 34.796605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.797584] Read of size 8 at addr ffff8880139df3f8 by task sshd/221 [ 34.798383] [ 34.798618] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.799652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.800668] Call Trace: [ 34.801000] <TASK> [ 34.801335] dump_stack_lvl+0x91/0xf0 [ 34.801846] print_report+0xcc/0x620 [ 34.802348] ? __virt_addr_valid+0x102/0x340 [ 34.802951] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.803606] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.804257] kasan_report+0xbe/0xf0 [ 34.804755] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.805401] vma_interval_tree_remove+0xc75/0xec0 [ 34.806031] vma_prepare+0xc54/0x11a0 [ 34.806537] __split_vma+0x5af/0x950 [ 34.807051] ? __pfx___split_vma+0x10/0x10 [ 34.807604] ? find_held_lock+0x2c/0x110 [ 34.808149] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.808739] ? lock_is_held_type+0x9f/0x120 [ 34.809296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.809926] ? mtree_range_walk+0x632/0x900 [ 34.810498] ? mas_walk+0x5c7/0x7c0 [ 34.810995] do_vmi_munmap+0x1f1/0x2b0 [ 34.811514] mmap_region+0x1f9/0x2660 [ 34.812017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.812560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.813311] ? __pfx_lock_acquire+0x10/0x10 [ 34.813874] ? __pfx_mmap_region+0x10/0x10 [ 34.814424] ? security_mmap_addr+0x7d/0xa0 [ 34.814983] ? get_unmapped_area+0x1f5/0x3f0 [ 34.815554] do_mmap+0x854/0xf00 [ 34.816008] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.816529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.817129] ksys_mmap_pgoff+0x3af/0x500 [ 34.817672] do_syscall_64+0x3f/0x90 [ 34.818170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.818864] RIP: 0033:0x7fa2380d1d82 [ 34.819338] 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 [ 34.821604] RSP: 002b:00007ffef24787f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.822564] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2380d1d82 [ 34.823480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa23750b000 [ 34.824362] RBP: 00007fa23750b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.825248] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b2b2f2980 [ 34.826182] R13: 00007ffef2478810 R14: 00007ffef2478840 R15: 00007ffef2478ba0 [ 34.827010] </TASK> [ 34.827289] [ 34.827496] Allocated by task 214: [ 34.827906] kasan_save_stack+0x22/0x50 [ 34.828393] kasan_set_track+0x25/0x30 [ 34.828860] __kasan_slab_alloc+0x59/0x70 [ 34.829358] kmem_cache_alloc+0x16b/0x370 [ 34.829950] vm_area_dup+0x20/0x160 [ 34.830503] __split_vma+0x170/0x950 [ 34.831097] split_vma+0xc6/0x110 [ 34.831629] mprotect_fixup+0x8d2/0xb30 [ 34.832229] do_mprotect_pkey+0x87e/0xd40 [ 34.832852] __x64_sys_mprotect+0x78/0xc0 [ 34.833487] do_syscall_64+0x3f/0x90 [ 34.834055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.834833] [ 34.835086] Freed by task 19: [ 34.835543] kasan_save_stack+0x22/0x50 [ 34.836141] kasan_set_track+0x25/0x30 [ 34.836729] kasan_save_free_info+0x2b/0x50 [ 34.837369] __kasan_slab_free+0x10a/0x190 [ 34.837899] kmem_cache_free+0x10d/0x4d0 [ 34.838399] rcu_core+0x8c8/0x2860 [ 34.838845] __do_softirq+0x1b7/0x7d4 [ 34.839315] [ 34.839529] Last potentially related work creation: [ 34.840171] kasan_save_stack+0x22/0x50 [ 34.840672] __kasan_record_aux_stack+0x8e/0xa0 [ 34.841286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.841955] remove_vma+0x139/0x170 [ 34.842401] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.842983] do_vmi_munmap+0x1f1/0x2b0 [ 34.843474] __vm_munmap+0x138/0x3a0 [ 34.843945] __x64_sys_munmap+0x59/0x80 [ 34.844452] do_syscall_64+0x3f/0x90 [ 34.844971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.845644] [ 34.845873] The buggy address belongs to the object at ffff8880139df3a0 [ 34.845873] which belongs to the cache vm_area_struct of size 168 [ 34.847422] The buggy address is located 88 bytes inside of [ 34.847422] freed 168-byte region [ffff8880139df3a0, ffff8880139df448) [ 34.848918] [ 34.849148] The buggy address belongs to the physical page: [ 34.849853] page:00000000f2ab7a54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x139df [ 34.851030] memcg:ffff8880139dd101 [ 34.851486] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.852161] page_type: 0xffffffff() [ 34.852641] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.853604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880139dd101 [ 34.854542] page dumped because: kasan: bad access detected [ 34.855249] [ 34.855476] Memory state around the buggy address: [ 34.856084] ffff8880139df280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.856992] ffff8880139df300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.857914] >ffff8880139df380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.858822] ^ [ 34.859713] ffff8880139df400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.860621] ffff8880139df480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.861528] ================================================================== [ 34.862520] Disabling lock debugging due to kernel taint [ 36.971131] BUG: Bad rss-counter state mm:0000000074f522b3 type:MM_FILEPAGES val:33 [ 36.972681] BUG: Bad rss-counter state mm:0000000074f522b3 type:MM_ANONPAGES val:22 [ 37.438681] BUG: Bad rss-counter state mm:000000003f1432ee type:MM_FILEPAGES val:33 [ 37.439700] BUG: Bad rss-counter state mm:000000003f1432ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32601' (ECDSA) to the list of known hosts. 2023/06/20 01:10:07 fuzzer started 2023/06/20 01:10:07 dialing manager at localhost:44161 2023/06/20 01:10:07 checking machine... 2023/06/20 01:10:07 checking revisions... [ 38.151349] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:10:07 testing simple program... [ 38.194297] cgroup: Unknown subsys name 'net' [ 38.232124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888018f71b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008f44000 RSP=ffff88801c9a7a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801c9a7d68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c0384 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 00007f4932dce900 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=00007f49333860b0 CR3=0000000015894000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fff8a541e28 CR3=000000000c992000 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=2036303a30313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a30313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000