syzkaller login: [ 31.162864] BUG: Bad rss-counter state mm:000000001a4c6352 type:MM_FILEPAGES val:33 [ 31.164223] BUG: Bad rss-counter state mm:000000001a4c6352 type:MM_ANONPAGES val:22 [ 31.336387] ================================================================== [ 31.337519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.338676] Read of size 8 at addr ffff88800e795058 by task sshd/220 [ 31.339751] [ 31.340062] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.341187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.342402] Call Trace: [ 31.342812] [ 31.343185] dump_stack_lvl+0x91/0xf0 [ 31.343811] print_report+0xcc/0x620 [ 31.344438] ? __virt_addr_valid+0x102/0x340 [ 31.345180] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.345978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.346772] kasan_report+0xbe/0xf0 [ 31.347390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348228] vma_interval_tree_remove+0xc75/0xec0 [ 31.348870] vma_prepare+0xc54/0x11a0 [ 31.349394] __split_vma+0x5af/0x950 [ 31.349883] ? __pfx___split_vma+0x10/0x10 [ 31.350449] ? find_held_lock+0x2c/0x110 [ 31.351001] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.351602] ? lock_is_held_type+0x9f/0x120 [ 31.352188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.352827] ? mtree_range_walk+0x632/0x900 [ 31.353424] ? mas_walk+0x5c7/0x7c0 [ 31.353938] do_vmi_munmap+0x1f1/0x2b0 [ 31.354527] mmap_region+0x1f9/0x2660 [ 31.355203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.355950] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.356908] ? __pfx_lock_acquire+0x10/0x10 [ 31.357468] ? __pfx_mmap_region+0x10/0x10 [ 31.358053] ? security_mmap_addr+0x7d/0xa0 [ 31.358605] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359209] do_mmap+0x854/0xf00 [ 31.359703] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360860] ksys_mmap_pgoff+0x3af/0x500 [ 31.361393] do_syscall_64+0x3f/0x90 [ 31.361958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362629] RIP: 0033:0x7fc2418aed82 [ 31.363100] 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 [ 31.365338] RSP: 002b:00007ffe73c2acd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.366292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2418aed82 [ 31.367174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc240ce8000 [ 31.368082] RBP: 00007fc240ce8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368971] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cbf584ec0 [ 31.369857] R13: 00007ffe73c2acf0 R14: 00007ffe73c2ad20 R15: 00007ffe73c2b080 [ 31.370746] [ 31.371053] [ 31.371277] Allocated by task 213: [ 31.371738] kasan_save_stack+0x22/0x50 [ 31.372264] kasan_set_track+0x25/0x30 [ 31.372775] __kasan_slab_alloc+0x59/0x70 [ 31.373323] kmem_cache_alloc+0x16b/0x370 [ 31.373863] vm_area_dup+0x20/0x160 [ 31.374342] __split_vma+0x170/0x950 [ 31.374826] split_vma+0xc6/0x110 [ 31.375283] mprotect_fixup+0x8d2/0xb30 [ 31.375816] do_mprotect_pkey+0x87e/0xd40 [ 31.376354] __x64_sys_mprotect+0x78/0xc0 [ 31.376928] do_syscall_64+0x3f/0x90 [ 31.377423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378095] [ 31.378320] Freed by task 19: [ 31.378718] kasan_save_stack+0x22/0x50 [ 31.379247] kasan_set_track+0x25/0x30 [ 31.379788] kasan_save_free_info+0x2b/0x50 [ 31.380345] __kasan_slab_free+0x10a/0x190 [ 31.380937] kmem_cache_free+0x10d/0x4d0 [ 31.381469] rcu_core+0x8c8/0x2860 [ 31.381929] __do_softirq+0x1b7/0x7d4 [ 31.382426] [ 31.382652] Last potentially related work creation: [ 31.383294] kasan_save_stack+0x22/0x50 [ 31.383831] __kasan_record_aux_stack+0x8e/0xa0 [ 31.384431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.385100] remove_vma+0x139/0x170 [ 31.385567] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.386155] do_vmi_munmap+0x1f1/0x2b0 [ 31.386660] __vm_munmap+0x138/0x3a0 [ 31.387185] __x64_sys_munmap+0x59/0x80 [ 31.387743] do_syscall_64+0x3f/0x90 [ 31.388287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388960] [ 31.389182] Second to last potentially related work creation: [ 31.389894] kasan_save_stack+0x22/0x50 [ 31.390418] __kasan_record_aux_stack+0x8e/0xa0 [ 31.391019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.391706] remove_vma+0x139/0x170 [ 31.392177] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392755] do_vmi_munmap+0x1f1/0x2b0 [ 31.393260] mmap_region+0x1f9/0x2660 [ 31.393750] do_mmap+0x854/0xf00 [ 31.394205] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.394709] ksys_mmap_pgoff+0x3af/0x500 [ 31.395234] do_syscall_64+0x3f/0x90 [ 31.395744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.396414] [ 31.396638] The buggy address belongs to the object at ffff88800e795000 [ 31.396638] which belongs to the cache vm_area_struct of size 168 [ 31.398166] The buggy address is located 88 bytes inside of [ 31.398166] freed 168-byte region [ffff88800e795000, ffff88800e7950a8) [ 31.399658] [ 31.399884] The buggy address belongs to the physical page: [ 31.400572] page:0000000063a2026b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe795 [ 31.401704] memcg:ffff88800e28a701 [ 31.402148] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.402873] page_type: 0xffffffff() [ 31.403339] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393d00 dead000000000003 [ 31.404315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28a701 [ 31.405266] page dumped because: kasan: bad access detected [ 31.405953] [ 31.406175] Memory state around the buggy address: [ 31.406777] ffff88800e794f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.407681] ffff88800e794f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.408568] >ffff88800e795000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.409453] ^ [ 31.410212] ffff88800e795080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.411102] ffff88800e795100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.412002] ================================================================== [ 31.413040] Disabling lock debugging due to kernel taint [ 33.524046] BUG: Bad rss-counter state mm:0000000012e1d4d5 type:MM_FILEPAGES val:33 [ 33.525236] BUG: Bad rss-counter state mm:0000000012e1d4d5 type:MM_ANONPAGES val:22 [ 34.006289] BUG: Bad rss-counter state mm:000000001ce7a1ef type:MM_FILEPAGES val:33 [ 34.007491] BUG: Bad rss-counter state mm:000000001ce7a1ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62071' (ECDSA) to the list of known hosts. 2023/06/20 12:24:35 fuzzer started 2023/06/20 12:24:35 dialing manager at localhost:36067 2023/06/20 12:24:35 checking machine... 2023/06/20 12:24:35 checking revisions... [ 34.652248] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:24:35 testing simple program... [ 34.707284] cgroup: Unknown subsys name 'net' [ 34.772680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffdb62c7918 CR3=0000000005482000 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=00007f19b2508510000055adda5a4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81afa8fc RDX=0000000000000000 RSI=ffffffff8617bbfa RDI=ffffffff85e2a910 RBP=ffffffff85e2a910 RSP=ffff88806cf099b8 R8 =ffffffff8617bbfa R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000002bfd3 R12=ffffffff85e2a910 R13=ffffffff85e2a910 R14=ffffffff85e2a910 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000256 [---ZAP-] 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 00007ff8329b6700 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=00007f0b0c137770 CR3=000000000e372000 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=2035333a34323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a34323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000