syzkaller login: [ 30.946869] BUG: Bad rss-counter state mm:0000000073f78422 type:MM_FILEPAGES val:33 [ 30.948553] BUG: Bad rss-counter state mm:0000000073f78422 type:MM_ANONPAGES val:22 [ 31.104496] ================================================================== [ 31.105383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.106304] Read of size 8 at addr ffff88800f0296b0 by task sshd/220 [ 31.107055] [ 31.107275] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.108251] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.109209] Call Trace: [ 31.109523] [ 31.109807] dump_stack_lvl+0x91/0xf0 [ 31.110292] print_report+0xcc/0x620 [ 31.110763] ? __virt_addr_valid+0x102/0x340 [ 31.111302] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112554] kasan_report+0xbe/0xf0 [ 31.113026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113643] vma_interval_tree_remove+0xc75/0xec0 [ 31.114234] vma_prepare+0xc54/0x11a0 [ 31.114700] __split_vma+0x5af/0x950 [ 31.115167] ? __pfx___split_vma+0x10/0x10 [ 31.115697] ? find_held_lock+0x2c/0x110 [ 31.116211] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.116769] ? lock_is_held_type+0x9f/0x120 [ 31.117301] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.118000] ? mtree_range_walk+0x632/0x900 [ 31.118570] ? mas_walk+0x5c7/0x7c0 [ 31.119051] do_vmi_munmap+0x1f1/0x2b0 [ 31.119551] mmap_region+0x1f9/0x2660 [ 31.120046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.121294] ? __pfx_lock_acquire+0x10/0x10 [ 31.121845] ? __pfx_mmap_region+0x10/0x10 [ 31.122387] ? security_mmap_addr+0x7d/0xa0 [ 31.122938] ? get_unmapped_area+0x1f5/0x3f0 [ 31.123489] do_mmap+0x854/0xf00 [ 31.123953] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.124455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.125035] ksys_mmap_pgoff+0x3af/0x500 [ 31.125556] do_syscall_64+0x3f/0x90 [ 31.126045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126704] RIP: 0033:0x7ff20bd31d82 [ 31.127173] 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 [ 31.129349] RSP: 002b:00007ffd46b140e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.130262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff20bd31d82 [ 31.131121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff20b16b000 [ 31.131991] RBP: 00007ff20b16b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.132869] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc9f82bf60 [ 31.133744] R13: 00007ffd46b14100 R14: 00007ffd46b14130 R15: 00007ffd46b14490 [ 31.134635] [ 31.134948] [ 31.135173] Allocated by task 213: [ 31.135617] kasan_save_stack+0x22/0x50 [ 31.136161] kasan_set_track+0x25/0x30 [ 31.136676] __kasan_slab_alloc+0x59/0x70 [ 31.137218] kmem_cache_alloc+0x16b/0x370 [ 31.137749] vm_area_dup+0x20/0x160 [ 31.138218] __split_vma+0x170/0x950 [ 31.138701] split_vma+0xc6/0x110 [ 31.139160] mprotect_fixup+0x8d2/0xb30 [ 31.139692] do_mprotect_pkey+0x87e/0xd40 [ 31.140242] __x64_sys_mprotect+0x78/0xc0 [ 31.140794] do_syscall_64+0x3f/0x90 [ 31.141285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141953] [ 31.142174] Freed by task 19: [ 31.142572] kasan_save_stack+0x22/0x50 [ 31.143101] kasan_set_track+0x25/0x30 [ 31.143617] kasan_save_free_info+0x2b/0x50 [ 31.144190] __kasan_slab_free+0x10a/0x190 [ 31.144754] kmem_cache_free+0x10d/0x4d0 [ 31.145275] rcu_core+0x8c8/0x2860 [ 31.145756] __do_softirq+0x1b7/0x7d4 [ 31.146253] [ 31.146469] Last potentially related work creation: [ 31.147079] kasan_save_stack+0x22/0x50 [ 31.147606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.148200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.148867] remove_vma+0x139/0x170 [ 31.149358] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149942] do_vmi_munmap+0x1f1/0x2b0 [ 31.150449] __vm_munmap+0x138/0x3a0 [ 31.150933] __x64_sys_munmap+0x59/0x80 [ 31.151453] do_syscall_64+0x3f/0x90 [ 31.151966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152628] [ 31.152850] Second to last potentially related work creation: [ 31.153563] kasan_save_stack+0x22/0x50 [ 31.154093] __kasan_record_aux_stack+0x8e/0xa0 [ 31.154692] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.155361] remove_vma+0x139/0x170 [ 31.155849] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.156432] do_vmi_munmap+0x1f1/0x2b0 [ 31.156934] mmap_region+0x1f9/0x2660 [ 31.157432] do_mmap+0x854/0xf00 [ 31.157870] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.158380] ksys_mmap_pgoff+0x3af/0x500 [ 31.158894] do_syscall_64+0x3f/0x90 [ 31.159384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160060] [ 31.160283] The buggy address belongs to the object at ffff88800f029658 [ 31.160283] which belongs to the cache vm_area_struct of size 168 [ 31.161822] The buggy address is located 88 bytes inside of [ 31.161822] freed 168-byte region [ffff88800f029658, ffff88800f029700) [ 31.163290] [ 31.163517] The buggy address belongs to the physical page: [ 31.164219] page:000000001be62679 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf029 [ 31.165346] memcg:ffff888014496e01 [ 31.165799] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.166464] page_type: 0xffffffff() [ 31.166937] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae300 dead000000000004 [ 31.167896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014496e01 [ 31.168828] page dumped because: kasan: bad access detected [ 31.169508] [ 31.169729] Memory state around the buggy address: [ 31.170312] ffff88800f029580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.171196] ffff88800f029600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.172098] >ffff88800f029680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.172979] ^ [ 31.173580] ffff88800f029700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.174465] ffff88800f029780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.175345] ================================================================== [ 31.176392] Disabling lock debugging due to kernel taint [ 33.550279] BUG: Bad rss-counter state mm:00000000dda03773 type:MM_FILEPAGES val:33 [ 33.551345] BUG: Bad rss-counter state mm:00000000dda03773 type:MM_ANONPAGES val:22 [ 34.095052] BUG: Bad rss-counter state mm:00000000cdb02c39 type:MM_FILEPAGES val:33 [ 34.096417] BUG: Bad rss-counter state mm:00000000cdb02c39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1832' (ECDSA) to the list of known hosts. 2023/06/20 22:03:07 fuzzer started 2023/06/20 22:03:07 dialing manager at localhost:36067 2023/06/20 22:03:07 checking machine... 2023/06/20 22:03:07 checking revisions... [ 34.810996] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:03:07 testing simple program... [ 34.864876] cgroup: Unknown subsys name 'net' [ 34.935543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:06 Registers: info registers vcpu 0 RAX=0000000000000246 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffff88800fd255b4 RBP=ffffffff85265479 RSP=ffff8880146c7c70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000132 R13=0000000000000000 R14=ffff88800fd251c0 R15=0000000000000cc0 RIP=ffffffff8122e7d3 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 00007f6fc267f900 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=00007f6fc2c370b0 CR3=000000001a946000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9c877e9ff0 CR3=000000000ca86000 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=a155ea291c5ea6baa7481e8c218fe766 XMM02=000000000011ad08eff9b2d0a8fce9cb XMM03=000000000011add82c67c8bc2e329bc3 XMM04=d2dbf2c4586cd55600000000000ae988 XMM05=19e9129bd510f2350000000000133040 XMM06=d364ec62a43d4ad90000000000131ea8 XMM07=e042d86d42eb936e0000000000122108 XMM08=d95e51a228e945f8000000000011add8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000