syzkaller login: [ 60.510933] BUG: Bad rss-counter state mm:0000000019949b98 type:MM_FILEPAGES val:33 [ 60.512045] BUG: Bad rss-counter state mm:0000000019949b98 type:MM_ANONPAGES val:22 [ 60.687497] ================================================================== [ 60.688525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.689682] Read of size 8 at addr ffff88800d7e3058 by task sshd/220 [ 60.690645] [ 60.690884] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.691827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.692923] Call Trace: [ 60.693276] [ 60.693587] dump_stack_lvl+0x91/0xf0 [ 60.694127] print_report+0xcc/0x620 [ 60.694653] ? __virt_addr_valid+0x102/0x340 [ 60.695257] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.695931] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.696616] kasan_report+0xbe/0xf0 [ 60.697150] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.697831] vma_interval_tree_remove+0xc75/0xec0 [ 60.698494] vma_prepare+0xc54/0x11a0 [ 60.699023] __split_vma+0x5af/0x950 [ 60.699538] ? __pfx___split_vma+0x10/0x10 [ 60.700106] ? find_held_lock+0x2c/0x110 [ 60.700667] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.701295] ? lock_is_held_type+0x9f/0x120 [ 60.701875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.702519] ? mtree_range_walk+0x632/0x900 [ 60.703113] ? mas_walk+0x5c7/0x7c0 [ 60.703644] do_vmi_munmap+0x1f1/0x2b0 [ 60.704162] mmap_region+0x1f9/0x2660 [ 60.704685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.705242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.706006] ? __pfx_lock_acquire+0x10/0x10 [ 60.706566] ? __pfx_mmap_region+0x10/0x10 [ 60.707133] ? security_mmap_addr+0x7d/0xa0 [ 60.707698] ? get_unmapped_area+0x1f5/0x3f0 [ 60.708283] do_mmap+0x854/0xf00 [ 60.708759] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.709285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.709879] ksys_mmap_pgoff+0x3af/0x500 [ 60.710418] do_syscall_64+0x3f/0x90 [ 60.710918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.711609] RIP: 0033:0x7f41e1ed7d82 [ 60.712098] 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 [ 60.714349] RSP: 002b:00007ffdd567eb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.715298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41e1ed7d82 [ 60.716202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41e1311000 [ 60.717110] RBP: 00007f41e1311000 R08: 0000000000000009 R09: 0000000000001000 [ 60.718001] R10: 0000000000000812 R11: 0000000000000206 R12: 000056247e9fff70 [ 60.718893] R13: 00007ffdd567eb40 R14: 00007ffdd567eb70 R15: 00007ffdd567eed0 [ 60.719790] [ 60.720104] [ 60.720329] Allocated by task 213: [ 60.720805] kasan_save_stack+0x22/0x50 [ 60.721345] kasan_set_track+0x25/0x30 [ 60.721873] __kasan_slab_alloc+0x59/0x70 [ 60.722435] kmem_cache_alloc+0x16b/0x370 [ 60.722987] vm_area_dup+0x20/0x160 [ 60.723470] __split_vma+0x170/0x950 [ 60.723966] split_vma+0xc6/0x110 [ 60.724433] mprotect_fixup+0x8d2/0xb30 [ 60.724974] do_mprotect_pkey+0x87e/0xd40 [ 60.725532] __x64_sys_mprotect+0x78/0xc0 [ 60.726088] do_syscall_64+0x3f/0x90 [ 60.726592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.727289] [ 60.727515] Freed by task 211: [ 60.727944] kasan_save_stack+0x22/0x50 [ 60.728481] kasan_set_track+0x25/0x30 [ 60.729022] kasan_save_free_info+0x2b/0x50 [ 60.729587] __kasan_slab_free+0x10a/0x190 [ 60.730169] kmem_cache_free+0x10d/0x4d0 [ 60.730708] rcu_core+0x8c8/0x2860 [ 60.731201] __do_softirq+0x1b7/0x7d4 [ 60.731706] [ 60.731933] Last potentially related work creation: [ 60.732542] kasan_save_stack+0x22/0x50 [ 60.733094] __kasan_record_aux_stack+0x8e/0xa0 [ 60.733699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.734392] remove_vma+0x139/0x170 [ 60.734874] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.735460] do_vmi_munmap+0x1f1/0x2b0 [ 60.735981] __vm_munmap+0x138/0x3a0 [ 60.736478] __x64_sys_munmap+0x59/0x80 [ 60.737005] do_syscall_64+0x3f/0x90 [ 60.737519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.738201] [ 60.738431] Second to last potentially related work creation: [ 60.739152] kasan_save_stack+0x22/0x50 [ 60.739683] __kasan_record_aux_stack+0x8e/0xa0 [ 60.740299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.741013] remove_vma+0x139/0x170 [ 60.741509] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.742119] do_vmi_munmap+0x1f1/0x2b0 [ 60.742652] mmap_region+0x1f9/0x2660 [ 60.743178] do_mmap+0x854/0xf00 [ 60.743651] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.744190] ksys_mmap_pgoff+0x3af/0x500 [ 60.744749] do_syscall_64+0x3f/0x90 [ 60.745273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.745984] [ 60.746220] The buggy address belongs to the object at ffff88800d7e3000 [ 60.746220] which belongs to the cache vm_area_struct of size 168 [ 60.747782] The buggy address is located 88 bytes inside of [ 60.747782] freed 168-byte region [ffff88800d7e3000, ffff88800d7e30a8) [ 60.749270] [ 60.749498] The buggy address belongs to the physical page: [ 60.750196] page:00000000a0bc5056 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7e3 [ 60.751332] memcg:ffff88800e165a01 [ 60.751784] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.752469] page_type: 0xffffffff() [ 60.752954] raw: 0100000000000200 ffff88800879fc80 ffffea000039ea40 dead000000000002 [ 60.753955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e165a01 [ 60.754958] page dumped because: kasan: bad access detected [ 60.755686] [ 60.755921] Memory state around the buggy address: [ 60.756563] ffff88800d7e2f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 60.757513] ffff88800d7e2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.758457] >ffff88800d7e3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.759401] ^ [ 60.760201] ffff88800d7e3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 60.761161] ffff88800d7e3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.762109] ================================================================== [ 60.763503] Disabling lock debugging due to kernel taint [ 62.991592] BUG: Bad rss-counter state mm:000000002f63b7e0 type:MM_FILEPAGES val:33 [ 62.992711] BUG: Bad rss-counter state mm:000000002f63b7e0 type:MM_ANONPAGES val:22 [ 63.482200] BUG: Bad rss-counter state mm:00000000e6d85acb type:MM_FILEPAGES val:33 [ 63.483275] BUG: Bad rss-counter state mm:00000000e6d85acb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33915' (ECDSA) to the list of known hosts. 2023/06/20 06:03:43 fuzzer started 2023/06/20 06:03:43 dialing manager at localhost:44161 2023/06/20 06:03:43 checking machine... 2023/06/20 06:03:43 checking revisions... [ 64.210580] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:43 testing simple program... [ 64.255738] cgroup: Unknown subsys name 'net' [ 64.299655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009abc000 RCX=0000000000000000 RDX=ffff888016dc51c0 RSI=ffffffff83869de2 RDI=0000000000000005 RBP=ffff88800e90a140 RSP=ffff88800d6779b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d677e60 R13=ffff888019a7a840 R14=0000000000001000 R15=0000000000000000 RIP=ffffffff814c081b 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 00007f206636d900 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=00007f2066924618 CR3=000000000ef80000 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=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 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=00007fabea098000 CR3=000000000e93c000 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=2032343a33303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000