syzkaller login: [ 33.394777] BUG: Bad rss-counter state mm:00000000be0b3c89 type:MM_FILEPAGES val:33 [ 33.395955] BUG: Bad rss-counter state mm:00000000be0b3c89 type:MM_ANONPAGES val:22 [ 33.435326] ================================================================== [ 33.436391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.437502] Read of size 8 at addr ffff88800e3b9798 by task sshd/221 [ 33.438344] [ 33.438566] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.439429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.440412] Call Trace: [ 33.440731] [ 33.441020] dump_stack_lvl+0x91/0xf0 [ 33.441514] print_report+0xcc/0x620 [ 33.442018] ? __virt_addr_valid+0x102/0x340 [ 33.442571] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.443199] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.443812] kasan_report+0xbe/0xf0 [ 33.444295] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.444926] vma_interval_tree_remove+0xc75/0xec0 [ 33.445551] vma_prepare+0xc54/0x11a0 [ 33.446047] __split_vma+0x5af/0x950 [ 33.446730] ? __pfx___split_vma+0x10/0x10 [ 33.447263] ? find_held_lock+0x2c/0x110 [ 33.447784] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.448353] ? lock_is_held_type+0x9f/0x120 [ 33.448920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.449540] ? mtree_range_walk+0x632/0x900 [ 33.450123] ? mas_walk+0x5c7/0x7c0 [ 33.450597] do_vmi_munmap+0x1f1/0x2b0 [ 33.451100] mmap_region+0x1f9/0x2660 [ 33.451596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.452126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.452893] ? __pfx_lock_acquire+0x10/0x10 [ 33.453457] ? __pfx_mmap_region+0x10/0x10 [ 33.454035] ? security_mmap_addr+0x7d/0xa0 [ 33.454602] ? get_unmapped_area+0x1f5/0x3f0 [ 33.455181] do_mmap+0x854/0xf00 [ 33.455648] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.456166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.456748] ksys_mmap_pgoff+0x3af/0x500 [ 33.457257] do_syscall_64+0x3f/0x90 [ 33.457740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.458427] RIP: 0033:0x7ffa532ddd82 [ 33.458889] 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 [ 33.461065] RSP: 002b:00007fff3d413818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.462023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa532ddd82 [ 33.462905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa52717000 [ 33.463785] RBP: 00007ffa52717000 R08: 0000000000000009 R09: 0000000000001000 [ 33.464677] R10: 0000000000000812 R11: 0000000000000206 R12: 000055652b374ec0 [ 33.465559] R13: 00007fff3d413830 R14: 00007fff3d413860 R15: 00007fff3d413bc0 [ 33.466467] [ 33.466792] [ 33.467022] Allocated by task 214: [ 33.467497] kasan_save_stack+0x22/0x50 [ 33.468044] kasan_set_track+0x25/0x30 [ 33.468589] __kasan_slab_alloc+0x59/0x70 [ 33.469166] kmem_cache_alloc+0x16b/0x370 [ 33.469729] vm_area_dup+0x20/0x160 [ 33.470242] __split_vma+0x170/0x950 [ 33.470757] split_vma+0xc6/0x110 [ 33.471225] mprotect_fixup+0x8d2/0xb30 [ 33.471745] do_mprotect_pkey+0x87e/0xd40 [ 33.472283] __x64_sys_mprotect+0x78/0xc0 [ 33.472831] do_syscall_64+0x3f/0x90 [ 33.473331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.474017] [ 33.474243] Freed by task 214: [ 33.474648] kasan_save_stack+0x22/0x50 [ 33.475173] kasan_set_track+0x25/0x30 [ 33.475681] kasan_save_free_info+0x2b/0x50 [ 33.476254] __kasan_slab_free+0x10a/0x190 [ 33.476814] kmem_cache_free+0x10d/0x4d0 [ 33.477345] rcu_core+0x8c8/0x2860 [ 33.477804] __do_softirq+0x1b7/0x7d4 [ 33.478313] [ 33.478537] Last potentially related work creation: [ 33.479140] kasan_save_stack+0x22/0x50 [ 33.479661] __kasan_record_aux_stack+0x8e/0xa0 [ 33.480254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.480919] remove_vma+0x139/0x170 [ 33.481397] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.481979] do_vmi_munmap+0x1f1/0x2b0 [ 33.482496] __vm_munmap+0x138/0x3a0 [ 33.482983] __x64_sys_munmap+0x59/0x80 [ 33.483492] do_syscall_64+0x3f/0x90 [ 33.483978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.484640] [ 33.484862] The buggy address belongs to the object at ffff88800e3b9740 [ 33.484862] which belongs to the cache vm_area_struct of size 168 [ 33.486412] The buggy address is located 88 bytes inside of [ 33.486412] freed 168-byte region [ffff88800e3b9740, ffff88800e3b97e8) [ 33.487878] [ 33.488103] The buggy address belongs to the physical page: [ 33.488791] page:00000000b7f807c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b9 [ 33.489919] memcg:ffff888016b0c501 [ 33.490386] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.491064] page_type: 0xffffffff() [ 33.491557] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.492523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b0c501 [ 33.493471] page dumped because: kasan: bad access detected [ 33.494172] [ 33.494398] Memory state around the buggy address: [ 33.495002] ffff88800e3b9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.495891] ffff88800e3b9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.496780] >ffff88800e3b9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.497685] ^ [ 33.498215] ffff88800e3b9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.499101] ffff88800e3b9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.499983] ================================================================== [ 33.501426] Disabling lock debugging due to kernel taint [ 36.072743] BUG: Bad rss-counter state mm:000000003c4a8def type:MM_FILEPAGES val:33 [ 36.073745] BUG: Bad rss-counter state mm:000000003c4a8def type:MM_ANONPAGES val:22 [ 36.660331] BUG: Bad rss-counter state mm:000000004fd3197f type:MM_FILEPAGES val:33 [ 36.661498] BUG: Bad rss-counter state mm:000000004fd3197f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49969' (ECDSA) to the list of known hosts. 2023/06/20 03:31:32 fuzzer started 2023/06/20 03:31:32 dialing manager at localhost:44161 2023/06/20 03:31:32 checking machine... 2023/06/20 03:31:32 checking revisions... [ 37.302733] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:31:33 testing simple program... [ 37.352788] cgroup: Unknown subsys name 'net' [ 37.401120] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fff30be04a0 RCX=000000000000001e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=00007fff30be06e0 RSP=00007fff30be0240 R8 =0000556fcc9829b0 R9 =0000000000000001 R10=0000000000000017 R11=0000556fcc981980 R12=0000000000000000 R13=0000000000000000 R14=0000000000000053 R15=0000000000000005 RIP=00007f12ed235d62 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f12ec765900 00000000 00000000 GS =0000 0000000000000000 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=00007f12ebbd8be0 CR3=000000000f126000 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=e4de5bd5bd5c92bb704f5ef30f117234 XMM02=000000000011bb40ec2efd57dc4c00df XMM03=00000000001236c00f1d66e5ef4a4b09 XMM04=7687fda2ec542e9900000000000ae988 XMM05=51b37836cd54a3c10000000000133740 XMM06=c291bd5c70af25b90000000000133138 XMM07=e042d86d42eb936e0000000000123940 XMM08=0f1d66e5ef4a4b09000000000011bba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=0000564a96a86218 CR3=000000000f37a000 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=2032333a31333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a31333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000