syzkaller login: [ 28.735455] BUG: Bad rss-counter state mm:000000002438a713 type:MM_FILEPAGES val:33 [ 28.736650] BUG: Bad rss-counter state mm:000000002438a713 type:MM_ANONPAGES val:22 [ 28.886071] ================================================================== [ 28.886811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.887605] Read of size 8 at addr ffff88800d4ce310 by task sshd/220 [ 28.888257] [ 28.888440] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.889166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.889988] Call Trace: [ 28.890257] [ 28.890497] dump_stack_lvl+0x91/0xf0 [ 28.890918] print_report+0xcc/0x620 [ 28.891326] ? __virt_addr_valid+0x102/0x340 [ 28.891825] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.892352] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.892877] kasan_report+0xbe/0xf0 [ 28.893284] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.893806] vma_interval_tree_remove+0xc75/0xec0 [ 28.894318] vma_prepare+0xc54/0x11a0 [ 28.894727] __split_vma+0x5af/0x950 [ 28.895127] ? __pfx___split_vma+0x10/0x10 [ 28.895581] ? find_held_lock+0x2c/0x110 [ 28.896029] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.896507] ? lock_is_held_type+0x9f/0x120 [ 28.896968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.897482] ? mtree_range_walk+0x632/0x900 [ 28.897956] ? mas_walk+0x5c7/0x7c0 [ 28.898363] do_vmi_munmap+0x1f1/0x2b0 [ 28.898783] mmap_region+0x1f9/0x2660 [ 28.899198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.899634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.900265] ? __pfx_lock_acquire+0x10/0x10 [ 28.900729] ? __pfx_mmap_region+0x10/0x10 [ 28.901183] ? security_mmap_addr+0x7d/0xa0 [ 28.901631] ? get_unmapped_area+0x1f5/0x3f0 [ 28.902100] do_mmap+0x854/0xf00 [ 28.902475] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.902898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.903379] ksys_mmap_pgoff+0x3af/0x500 [ 28.903824] do_syscall_64+0x3f/0x90 [ 28.904234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904790] RIP: 0033:0x7f6dadb94d82 [ 28.905181] 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 [ 28.907000] RSP: 002b:00007fffd84aa068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.907779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dadb94d82 [ 28.908500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dacfce000 [ 28.909228] RBP: 00007f6dacfce000 R08: 0000000000000009 R09: 0000000000001000 [ 28.909957] R10: 0000000000000812 R11: 0000000000000206 R12: 000055707dd6dec0 [ 28.910681] R13: 00007fffd84aa080 R14: 00007fffd84aa0b0 R15: 00007fffd84aa410 [ 28.911410] [ 28.911674] [ 28.911855] Allocated by task 212: [ 28.912225] kasan_save_stack+0x22/0x50 [ 28.912655] kasan_set_track+0x25/0x30 [ 28.913076] __kasan_slab_alloc+0x59/0x70 [ 28.913525] kmem_cache_alloc+0x16b/0x370 [ 28.913972] vm_area_dup+0x20/0x160 [ 28.914358] __split_vma+0x170/0x950 [ 28.914759] split_vma+0xc6/0x110 [ 28.915128] mprotect_fixup+0x8d2/0xb30 [ 28.915563] do_mprotect_pkey+0x87e/0xd40 [ 28.916013] __x64_sys_mprotect+0x78/0xc0 [ 28.916454] do_syscall_64+0x3f/0x90 [ 28.916860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917412] [ 28.917595] Freed by task 210: [ 28.917931] kasan_save_stack+0x22/0x50 [ 28.918360] kasan_set_track+0x25/0x30 [ 28.918785] kasan_save_free_info+0x2b/0x50 [ 28.919243] __kasan_slab_free+0x10a/0x190 [ 28.919713] kmem_cache_free+0x10d/0x4d0 [ 28.920154] rcu_core+0x8c8/0x2860 [ 28.920539] __do_softirq+0x1b7/0x7d4 [ 28.920950] [ 28.921137] Last potentially related work creation: [ 28.921646] kasan_save_stack+0x22/0x50 [ 28.922082] __kasan_record_aux_stack+0x8e/0xa0 [ 28.922645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923193] remove_vma+0x139/0x170 [ 28.923586] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.924090] do_vmi_munmap+0x1f1/0x2b0 [ 28.924506] __vm_munmap+0x138/0x3a0 [ 28.924910] __x64_sys_munmap+0x59/0x80 [ 28.925335] do_syscall_64+0x3f/0x90 [ 28.925744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926297] [ 28.926482] The buggy address belongs to the object at ffff88800d4ce2b8 [ 28.926482] which belongs to the cache vm_area_struct of size 168 [ 28.927756] The buggy address is located 88 bytes inside of [ 28.927756] freed 168-byte region [ffff88800d4ce2b8, ffff88800d4ce360) [ 28.928969] [ 28.929155] The buggy address belongs to the physical page: [ 28.929725] page:00000000a6a7e9b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4ce [ 28.930661] memcg:ffff88800ea3d801 [ 28.931026] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.931635] page_type: 0xffffffff() [ 28.932039] raw: 0100000000000200 ffff8880087a0c80 ffffea0000254640 dead000000000003 [ 28.932840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea3d801 [ 28.933621] page dumped because: kasan: bad access detected [ 28.934196] [ 28.934383] Memory state around the buggy address: [ 28.934888] ffff88800d4ce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.935628] ffff88800d4ce280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.936376] >ffff88800d4ce300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.937110] ^ [ 28.937512] ffff88800d4ce380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.938259] ffff88800d4ce400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.938996] ================================================================== [ 28.939895] Disabling lock debugging due to kernel taint [ 31.256932] BUG: Bad rss-counter state mm:00000000b99a5de0 type:MM_FILEPAGES val:33 [ 31.258116] BUG: Bad rss-counter state mm:00000000b99a5de0 type:MM_ANONPAGES val:22 [ 31.765342] BUG: Bad rss-counter state mm:000000005f61d17c type:MM_FILEPAGES val:33 [ 31.766384] BUG: Bad rss-counter state mm:000000005f61d17c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39272' (ECDSA) to the list of known hosts. 2023/06/20 14:06:59 fuzzer started 2023/06/20 14:06:59 dialing manager at localhost:36067 2023/06/20 14:06:59 checking machine... 2023/06/20 14:06:59 checking revisions... [ 32.470350] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:06:59 testing simple program... [ 32.516760] cgroup: Unknown subsys name 'net' [ 32.564268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:06:59 Registers: info registers vcpu 0 RAX=000000000000002a RBX=fffffffffffffdf8 RCX=00007fb080881e83 RDX=000000000000006e RSI=00007fb0809458a0 RDI=0000000000000003 RBP=0000000000000002 RSP=ffff88800cf57f90 R8 =000055929fb012a0 R9 =0000000000000034 R10=000055929fb0b1e0 R11=0000000000000246 R12=676f6c2f7665642f R13=0000000000000000 R14=000000000000000b R15=000055929fae38b0 RIP=ffffffff84600049 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 00007fb08038f900 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=00007fb080944650 CR3=000000000998a000 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=0000000080000000 RBX=00007f6b031ab200 RCX=ffffffff813a0b19 RDX=ffff8880146a3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888015cff438 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880146a3680 R15=ffff888015cffd36 RIP=ffffffff814c086b 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 00007f6b028e1900 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=00007f6b01cea240 CR3=000000000d712000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=432567e4968ab09000000000000ae988 XMM05=6bce702947a40a400000000000133270 XMM06=19e9129bd510f2350000000000132128 XMM07=fb795ef6d65770560000000000121ba8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000