syzkaller login: [ 66.676475] BUG: Bad rss-counter state mm:00000000b5f374d5 type:MM_FILEPAGES val:33 [ 66.678758] BUG: Bad rss-counter state mm:00000000b5f374d5 type:MM_ANONPAGES val:22 [ 66.835848] ================================================================== [ 66.836775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.837700] Read of size 8 at addr ffff88800dfc16b0 by task sshd/221 [ 66.838704] [ 66.838987] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.839870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.840911] Call Trace: [ 66.841240] <TASK> [ 66.841550] dump_stack_lvl+0x91/0xf0 [ 66.842052] print_report+0xcc/0x620 [ 66.842655] ? __virt_addr_valid+0x102/0x340 [ 66.843303] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.844059] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.844807] kasan_report+0xbe/0xf0 [ 66.845384] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.846166] vma_interval_tree_remove+0xc75/0xec0 [ 66.846946] vma_prepare+0xc54/0x11a0 [ 66.847559] __split_vma+0x5af/0x950 [ 66.848164] ? __pfx___split_vma+0x10/0x10 [ 66.848830] ? find_held_lock+0x2c/0x110 [ 66.849403] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.849976] ? lock_is_held_type+0x9f/0x120 [ 66.850536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.851145] ? mtree_range_walk+0x632/0x900 [ 66.851714] ? mas_walk+0x5c7/0x7c0 [ 66.852208] do_vmi_munmap+0x1f1/0x2b0 [ 66.852717] mmap_region+0x1f9/0x2660 [ 66.853197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.853728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.854470] ? __pfx_lock_acquire+0x10/0x10 [ 66.855002] ? __pfx_mmap_region+0x10/0x10 [ 66.855552] ? security_mmap_addr+0x7d/0xa0 [ 66.856095] ? get_unmapped_area+0x1f5/0x3f0 [ 66.856653] do_mmap+0x854/0xf00 [ 66.857093] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.857602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.858165] ksys_mmap_pgoff+0x3af/0x500 [ 66.858702] do_syscall_64+0x3f/0x90 [ 66.859179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.859842] RIP: 0033:0x7f13cbaf9d82 [ 66.860322] 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 [ 66.862496] RSP: 002b:00007ffcaa774e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.863413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13cbaf9d82 [ 66.864272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13caf33000 [ 66.865138] RBP: 00007f13caf33000 R08: 0000000000000009 R09: 0000000000001000 [ 66.865998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e81aa8ff60 [ 66.866870] R13: 00007ffcaa774ea0 R14: 00007ffcaa774ed0 R15: 00007ffcaa775230 [ 66.867745] </TASK> [ 66.868045] [ 66.868264] Allocated by task 214: [ 66.868707] kasan_save_stack+0x22/0x50 [ 66.869210] kasan_set_track+0x25/0x30 [ 66.869712] __kasan_slab_alloc+0x59/0x70 [ 66.870237] kmem_cache_alloc+0x16b/0x370 [ 66.870781] vm_area_dup+0x20/0x160 [ 66.871242] __split_vma+0x170/0x950 [ 66.871720] split_vma+0xc6/0x110 [ 66.872194] mprotect_fixup+0x8d2/0xb30 [ 66.872710] do_mprotect_pkey+0x87e/0xd40 [ 66.873231] __x64_sys_mprotect+0x78/0xc0 [ 66.873781] do_syscall_64+0x3f/0x90 [ 66.874252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.874922] [ 66.875138] Freed by task 214: [ 66.875553] kasan_save_stack+0x22/0x50 [ 66.876070] kasan_set_track+0x25/0x30 [ 66.876582] kasan_save_free_info+0x2b/0x50 [ 66.877121] __kasan_slab_free+0x10a/0x190 [ 66.877669] kmem_cache_free+0x10d/0x4d0 [ 66.878183] rcu_core+0x8c8/0x2860 [ 66.878658] __do_softirq+0x1b7/0x7d4 [ 66.879143] [ 66.879360] Last potentially related work creation: [ 66.880157] kasan_save_stack+0x22/0x50 [ 66.880677] __kasan_record_aux_stack+0x8e/0xa0 [ 66.881247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.881921] remove_vma+0x139/0x170 [ 66.882374] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.882950] do_vmi_munmap+0x1f1/0x2b0 [ 66.883450] __vm_munmap+0x138/0x3a0 [ 66.883926] __x64_sys_munmap+0x59/0x80 [ 66.884456] do_syscall_64+0x3f/0x90 [ 66.884922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.885582] [ 66.885800] Second to last potentially related work creation: [ 66.886501] kasan_save_stack+0x22/0x50 [ 66.887007] __kasan_record_aux_stack+0x8e/0xa0 [ 66.887598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.888244] remove_vma+0x139/0x170 [ 66.888710] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.889257] do_vmi_munmap+0x1f1/0x2b0 [ 66.889760] mmap_region+0x1f9/0x2660 [ 66.890236] do_mmap+0x854/0xf00 [ 66.890692] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.891184] ksys_mmap_pgoff+0x3af/0x500 [ 66.891700] do_syscall_64+0x3f/0x90 [ 66.892212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.892863] [ 66.893080] The buggy address belongs to the object at ffff88800dfc1658 [ 66.893080] which belongs to the cache vm_area_struct of size 168 [ 66.894576] The buggy address is located 88 bytes inside of [ 66.894576] freed 168-byte region [ffff88800dfc1658, ffff88800dfc1700) [ 66.896004] [ 66.896224] The buggy address belongs to the physical page: [ 66.896889] page:000000004972325e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc1 [ 66.897986] memcg:ffff88800df45b01 [ 66.898435] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.899079] page_type: 0xffffffff() [ 66.899550] raw: 0100000000000200 ffff88800879fc80 ffffea0000318840 dead000000000006 [ 66.900499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df45b01 [ 66.901406] page dumped because: kasan: bad access detected [ 66.902063] [ 66.902282] Memory state around the buggy address: [ 66.902881] ffff88800dfc1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.903741] ffff88800dfc1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 66.904630] >ffff88800dfc1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.905485] ^ [ 66.906068] ffff88800dfc1700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 66.906942] ffff88800dfc1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 66.907812] ================================================================== [ 66.908805] Disabling lock debugging due to kernel taint [ 68.614341] BUG: Bad rss-counter state mm:000000009fc4c673 type:MM_FILEPAGES val:33 [ 68.614954] BUG: Bad rss-counter state mm:000000009fc4c673 type:MM_ANONPAGES val:22 [ 69.191696] BUG: Bad rss-counter state mm:0000000049d830f6 type:MM_FILEPAGES val:33 [ 69.193020] BUG: Bad rss-counter state mm:0000000049d830f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30011' (ECDSA) to the list of known hosts. 2023/06/19 12:51:08 fuzzer started 2023/06/19 12:51:08 dialing manager at localhost:44161 2023/06/19 12:51:08 checking machine... 2023/06/19 12:51:08 checking revisions... [ 69.838215] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:51:08 testing simple program... [ 69.902163] cgroup: Unknown subsys name 'net' [ 69.963649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f2b28b52240 CR3=000000000c7cc000 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=2038303a31353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a33c000 RBX=ffff88806cf09ee8 RCX=1ffff11003467800 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000003 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff8880160715b8 RIP=ffffffff8137fc84 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 00007fc3df32f900 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=00007fc3df2f4008 CR3=00000000164de000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000