syzkaller login: [ 35.923835] BUG: Bad rss-counter state mm:00000000e5bcd45c type:MM_FILEPAGES val:33 [ 35.924850] BUG: Bad rss-counter state mm:00000000e5bcd45c type:MM_ANONPAGES val:22 [ 36.089809] ================================================================== [ 36.090771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.091748] Read of size 8 at addr ffff88800dec4b38 by task sshd/221 [ 36.092602] [ 36.092875] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.093732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.094713] Call Trace: [ 36.095090] [ 36.095388] dump_stack_lvl+0x91/0xf0 [ 36.095882] print_report+0xcc/0x620 [ 36.096376] ? __virt_addr_valid+0x102/0x340 [ 36.096932] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.097563] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.098189] kasan_report+0xbe/0xf0 [ 36.098686] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.099330] vma_interval_tree_remove+0xc75/0xec0 [ 36.099938] vma_prepare+0xc54/0x11a0 [ 36.100428] __split_vma+0x5af/0x950 [ 36.100905] ? __pfx___split_vma+0x10/0x10 [ 36.101447] ? find_held_lock+0x2c/0x110 [ 36.101983] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.102563] ? lock_is_held_type+0x9f/0x120 [ 36.103126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.103736] ? mtree_range_walk+0x632/0x900 [ 36.104303] ? mas_walk+0x5c7/0x7c0 [ 36.104784] do_vmi_munmap+0x1f1/0x2b0 [ 36.105292] mmap_region+0x1f9/0x2660 [ 36.105789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.106321] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.107062] ? __pfx_lock_acquire+0x10/0x10 [ 36.107596] ? __pfx_mmap_region+0x10/0x10 [ 36.108126] ? security_mmap_addr+0x7d/0xa0 [ 36.108660] ? get_unmapped_area+0x1f5/0x3f0 [ 36.109214] do_mmap+0x854/0xf00 [ 36.109655] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.110163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.110749] ksys_mmap_pgoff+0x3af/0x500 [ 36.111298] do_syscall_64+0x3f/0x90 [ 36.111789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.112454] RIP: 0033:0x7f5ce3b67d82 [ 36.112913] 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 [ 36.115111] RSP: 002b:00007ffc1d279018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.116045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ce3b67d82 [ 36.116911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ce2fa1000 [ 36.117780] RBP: 00007f5ce2fa1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.118640] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3dced6d90 [ 36.119514] R13: 00007ffc1d279030 R14: 00007ffc1d279060 R15: 00007ffc1d2793c0 [ 36.120377] [ 36.120678] [ 36.120897] Allocated by task 214: [ 36.121337] kasan_save_stack+0x22/0x50 [ 36.121852] kasan_set_track+0x25/0x30 [ 36.122357] __kasan_slab_alloc+0x59/0x70 [ 36.122906] kmem_cache_alloc+0x16b/0x370 [ 36.123431] vm_area_dup+0x20/0x160 [ 36.123894] __split_vma+0x170/0x950 [ 36.124374] split_vma+0xc6/0x110 [ 36.124824] mprotect_fixup+0x8d2/0xb30 [ 36.125336] do_mprotect_pkey+0x87e/0xd40 [ 36.125866] __x64_sys_mprotect+0x78/0xc0 [ 36.126394] do_syscall_64+0x3f/0x90 [ 36.126892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.127553] [ 36.127773] Freed by task 214: [ 36.128176] kasan_save_stack+0x22/0x50 [ 36.128685] kasan_set_track+0x25/0x30 [ 36.129192] kasan_save_free_info+0x2b/0x50 [ 36.129726] __kasan_slab_free+0x10a/0x190 [ 36.130263] kmem_cache_free+0x10d/0x4d0 [ 36.130796] rcu_core+0x8c8/0x2860 [ 36.131241] __do_softirq+0x1b7/0x7d4 [ 36.131719] [ 36.131937] Last potentially related work creation: [ 36.132536] kasan_save_stack+0x22/0x50 [ 36.133046] __kasan_record_aux_stack+0x8e/0xa0 [ 36.133705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.134359] remove_vma+0x139/0x170 [ 36.134840] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.135400] do_vmi_munmap+0x1f1/0x2b0 [ 36.135893] __vm_munmap+0x138/0x3a0 [ 36.136378] __x64_sys_munmap+0x59/0x80 [ 36.136895] do_syscall_64+0x3f/0x90 [ 36.137376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.138027] [ 36.138251] Second to last potentially related work creation: [ 36.138949] kasan_save_stack+0x22/0x50 [ 36.139455] __kasan_record_aux_stack+0x8e/0xa0 [ 36.140057] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.140720] remove_vma+0x139/0x170 [ 36.141174] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.141734] do_vmi_munmap+0x1f1/0x2b0 [ 36.142230] mmap_region+0x1f9/0x2660 [ 36.142723] do_mmap+0x854/0xf00 [ 36.143169] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.143673] ksys_mmap_pgoff+0x3af/0x500 [ 36.144185] do_syscall_64+0x3f/0x90 [ 36.144666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.145320] [ 36.145534] The buggy address belongs to the object at ffff88800dec4ae0 [ 36.145534] which belongs to the cache vm_area_struct of size 168 [ 36.147017] The buggy address is located 88 bytes inside of [ 36.147017] freed 168-byte region [ffff88800dec4ae0, ffff88800dec4b88) [ 36.148419] [ 36.148633] The buggy address belongs to the physical page: [ 36.149309] page:0000000087af5cd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdec4 [ 36.150429] memcg:ffff88800dce3701 [ 36.150875] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.151597] page_type: 0xffffffff() [ 36.152056] raw: 0100000000000200 ffff88800879fc80 ffffea0000648480 dead000000000003 [ 36.153003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dce3701 [ 36.153956] page dumped because: kasan: bad access detected [ 36.154631] [ 36.154872] Memory state around the buggy address: [ 36.155468] ffff88800dec4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.156338] ffff88800dec4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.157205] >ffff88800dec4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.158058] ^ [ 36.158664] ffff88800dec4b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.159538] ffff88800dec4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.160401] ================================================================== [ 36.161338] Disabling lock debugging due to kernel taint [ 38.775734] BUG: Bad rss-counter state mm:000000002cd8ef61 type:MM_FILEPAGES val:33 [ 38.776871] BUG: Bad rss-counter state mm:000000002cd8ef61 type:MM_ANONPAGES val:22 [ 39.210285] BUG: Bad rss-counter state mm:0000000019ec9731 type:MM_FILEPAGES val:33 [ 39.211861] BUG: Bad rss-counter state mm:0000000019ec9731 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12591' (ECDSA) to the list of known hosts. 2023/06/20 02:58:45 fuzzer started 2023/06/20 02:58:46 dialing manager at localhost:44161 2023/06/20 02:58:46 checking machine... 2023/06/20 02:58:46 checking revisions... [ 39.928099] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:58:46 testing simple program... [ 39.969263] cgroup: Unknown subsys name 'net' [ 40.022612] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:58:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100d9c5731 RSI=ffffffff813c26a1 RDI=ffff88806ce28140 RBP=ffff88806ce28140 RSP=ffff888010317e88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff88806ce2b98c R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff813c26c2 RFL=00000013 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcb40cca900 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=00007fcb400d3090 CR3=000000000982e000 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=f1f5eea05c4481d300000000000ae988 XMM01=d3fdd5f48436fbd700000000000aead0 XMM02=ac585006bc0bee6f00000000000f9530 XMM03=eff9b2d0a8fce9cb000000000011ccd8 XMM04=f92923334777ad90000000000011ce60 XMM05=ec2efd57dc4c00df000000000011cd90 XMM06=2fccd54c36d8a3f300000000000fb560 XMM07=693bd129e125714a00000000000f9338 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137736 RDX=ffff88801031f790 RSI=1ffff11002063ef4 RDI=1ffff11002063ef4 RBP=ffff88801031f7a0 RSP=ffff88801031f6d8 R8 =ffffffff8613773a R9 =ffff88801031f788 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801031f7a8 R13=ffff88801031f790 R14=ffff88801031fad0 R15=ffff88801031f748 RIP=ffffffff811310a7 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 00007fb23dfed900 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=00007fb23e5a4618 CR3=000000001bb10000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000