syzkaller login: [ 30.426274] BUG: Bad rss-counter state mm:0000000084ab58ed type:MM_FILEPAGES val:33 [ 30.427519] BUG: Bad rss-counter state mm:0000000084ab58ed type:MM_ANONPAGES val:22 [ 30.468613] ================================================================== [ 30.469613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.470540] Read of size 8 at addr ffff88800e5a4140 by task sshd/220 [ 30.471323] [ 30.471543] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.472399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.473377] Call Trace: [ 30.473692] [ 30.473974] dump_stack_lvl+0x91/0xf0 [ 30.474466] print_report+0xcc/0x620 [ 30.474966] ? __virt_addr_valid+0x102/0x340 [ 30.475518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.476135] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.476748] kasan_report+0xbe/0xf0 [ 30.477214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.477831] vma_interval_tree_remove+0xc75/0xec0 [ 30.478427] vma_prepare+0xc54/0x11a0 [ 30.478931] __split_vma+0x5af/0x950 [ 30.479406] ? __pfx___split_vma+0x10/0x10 [ 30.479930] ? find_held_lock+0x2c/0x110 [ 30.480446] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.481011] ? lock_is_held_type+0x9f/0x120 [ 30.481555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.482152] ? mtree_range_walk+0x632/0x900 [ 30.482705] ? mas_walk+0x5c7/0x7c0 [ 30.483185] do_vmi_munmap+0x1f1/0x2b0 [ 30.483683] mmap_region+0x1f9/0x2660 [ 30.484171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.484687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.485409] ? __pfx_lock_acquire+0x10/0x10 [ 30.485936] ? __pfx_mmap_region+0x10/0x10 [ 30.486462] ? security_mmap_addr+0x7d/0xa0 [ 30.486998] ? get_unmapped_area+0x1f5/0x3f0 [ 30.487552] do_mmap+0x854/0xf00 [ 30.487996] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.488496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.489056] ksys_mmap_pgoff+0x3af/0x500 [ 30.489560] do_syscall_64+0x3f/0x90 [ 30.490037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490685] RIP: 0033:0x7fb5a7515d82 [ 30.491153] 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 [ 30.493233] RSP: 002b:00007ffc9e69b1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.494131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5a7515d82 [ 30.494983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5a694f000 [ 30.495819] RBP: 00007fb5a694f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.496654] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7163d1f70 [ 30.497489] R13: 00007ffc9e69b1d0 R14: 00007ffc9e69b200 R15: 00007ffc9e69b560 [ 30.498341] [ 30.498639] [ 30.498871] Allocated by task 213: [ 30.499300] kasan_save_stack+0x22/0x50 [ 30.499795] kasan_set_track+0x25/0x30 [ 30.500288] __kasan_slab_alloc+0x59/0x70 [ 30.500807] kmem_cache_alloc+0x16b/0x370 [ 30.501319] vm_area_dup+0x20/0x160 [ 30.501768] __split_vma+0x170/0x950 [ 30.502235] split_vma+0xc6/0x110 [ 30.502680] mprotect_fixup+0x8d2/0xb30 [ 30.503193] do_mprotect_pkey+0x87e/0xd40 [ 30.503707] __x64_sys_mprotect+0x78/0xc0 [ 30.504225] do_syscall_64+0x3f/0x90 [ 30.504705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505348] [ 30.505568] Freed by task 213: [ 30.505963] kasan_save_stack+0x22/0x50 [ 30.506466] kasan_set_track+0x25/0x30 [ 30.506976] kasan_save_free_info+0x2b/0x50 [ 30.507502] __kasan_slab_free+0x10a/0x190 [ 30.508028] kmem_cache_free+0x10d/0x4d0 [ 30.508531] rcu_core+0x8c8/0x2860 [ 30.509073] __do_softirq+0x1b7/0x7d4 [ 30.509554] [ 30.509770] Last potentially related work creation: [ 30.510348] kasan_save_stack+0x22/0x50 [ 30.510865] __kasan_record_aux_stack+0x8e/0xa0 [ 30.511436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.512073] remove_vma+0x139/0x170 [ 30.512518] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.513068] do_vmi_munmap+0x1f1/0x2b0 [ 30.513561] __vm_munmap+0x138/0x3a0 [ 30.514026] __x64_sys_munmap+0x59/0x80 [ 30.514518] do_syscall_64+0x3f/0x90 [ 30.515009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515645] [ 30.515864] The buggy address belongs to the object at ffff88800e5a40e8 [ 30.515864] which belongs to the cache vm_area_struct of size 168 [ 30.517327] The buggy address is located 88 bytes inside of [ 30.517327] freed 168-byte region [ffff88800e5a40e8, ffff88800e5a4190) [ 30.518710] [ 30.518948] The buggy address belongs to the physical page: [ 30.519600] page:000000002d71d7ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5a4 [ 30.520678] memcg:ffff88801030dd01 [ 30.521102] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.521747] page_type: 0xffffffff() [ 30.522194] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.523104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801030dd01 [ 30.524001] page dumped because: kasan: bad access detected [ 30.524652] [ 30.524866] Memory state around the buggy address: [ 30.525437] ffff88800e5a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.526278] ffff88800e5a4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.527123] >ffff88800e5a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.527971] ^ [ 30.528600] ffff88800e5a4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.529442] ffff88800e5a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.530282] ================================================================== [ 30.531246] Disabling lock debugging due to kernel taint [ 32.522635] BUG: Bad rss-counter state mm:000000006a672054 type:MM_FILEPAGES val:33 [ 32.523755] BUG: Bad rss-counter state mm:000000006a672054 type:MM_ANONPAGES val:22 [ 32.998651] BUG: Bad rss-counter state mm:000000003ac54f4f type:MM_FILEPAGES val:33 [ 32.999931] BUG: Bad rss-counter state mm:000000003ac54f4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4980' (ECDSA) to the list of known hosts. 2023/06/21 02:57:06 fuzzer started 2023/06/21 02:57:06 dialing manager at localhost:36067 2023/06/21 02:57:06 checking machine... 2023/06/21 02:57:06 checking revisions... [ 33.740467] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:57:06 testing simple program... [ 33.786732] cgroup: Unknown subsys name 'net' [ 33.841539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:57:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000d RCX=ffffffff818b35da RDX=ffff88800fec1b40 RSI=0000000000000010 RDI=0000000000000005 RBP=ffffffff849049c0 RSP=ffff88800fda7df0 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000000005 R14=000000000000001b R15=dffffc0000000000 RIP=ffffffff814c04a0 RFL=00000212 [----A--] 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 00007ff037ab8900 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=00007fff8a1b5000 CR3=000000000e8c2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b97343 RBX=ffff88800dcb99e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dcb9a18 RBP=ffff888018970d38 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888018977780 R14=ffffffff813782f8 R15=ffff88800da20d80 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007f9ddd327140 CR3=0000000009bbe000 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=2036303a37353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a37353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000