syzkaller login: [ 30.190590] BUG: Bad rss-counter state mm:00000000699e9822 type:MM_FILEPAGES val:31 [ 30.191565] BUG: Bad rss-counter state mm:00000000699e9822 type:MM_ANONPAGES val:22 [ 30.316497] ================================================================== [ 30.317400] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.318347] Read of size 8 at addr ffff88801a353798 by task sshd/221 [ 30.319102] [ 30.319317] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.320329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.321287] Call Trace: [ 30.321629] [ 30.321915] dump_stack_lvl+0x91/0xf0 [ 30.322422] print_report+0xcc/0x620 [ 30.322908] ? __virt_addr_valid+0x102/0x340 [ 30.323457] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324065] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324679] kasan_report+0xbe/0xf0 [ 30.325150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325771] vma_interval_tree_remove+0xc75/0xec0 [ 30.326369] vma_prepare+0xc54/0x11a0 [ 30.326845] __split_vma+0x5af/0x950 [ 30.327315] ? __pfx___split_vma+0x10/0x10 [ 30.327841] ? find_held_lock+0x2c/0x110 [ 30.328357] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.328915] ? lock_is_held_type+0x9f/0x120 [ 30.329451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.330078] ? mtree_range_walk+0x632/0x900 [ 30.330626] ? mas_walk+0x5c7/0x7c0 [ 30.331102] do_vmi_munmap+0x1f1/0x2b0 [ 30.331598] mmap_region+0x1f9/0x2660 [ 30.332076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.332591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.333294] ? __pfx_lock_acquire+0x10/0x10 [ 30.333839] ? __pfx_mmap_region+0x10/0x10 [ 30.334364] ? security_mmap_addr+0x7d/0xa0 [ 30.334895] ? get_unmapped_area+0x1f5/0x3f0 [ 30.335440] do_mmap+0x854/0xf00 [ 30.335883] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.336377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.336931] ksys_mmap_pgoff+0x3af/0x500 [ 30.337440] do_syscall_64+0x3f/0x90 [ 30.337944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338589] RIP: 0033:0x7fb73bf1dd82 [ 30.339043] 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 [ 30.341225] RSP: 002b:00007ffe91bbae58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.342165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb73bf1dd82 [ 30.343058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb73b357000 [ 30.343903] RBP: 00007fb73b357000 R08: 0000000000000009 R09: 0000000000001000 [ 30.344745] R10: 0000000000000812 R11: 0000000000000206 R12: 000056478bffeb20 [ 30.345585] R13: 00007ffe91bbae70 R14: 00007ffe91bbaea0 R15: 00007ffe91bbb200 [ 30.346447] [ 30.346743] [ 30.346959] Allocated by task 214: [ 30.347380] kasan_save_stack+0x22/0x50 [ 30.347883] kasan_set_track+0x25/0x30 [ 30.348373] __kasan_slab_alloc+0x59/0x70 [ 30.348895] kmem_cache_alloc+0x16b/0x370 [ 30.349408] vm_area_dup+0x20/0x160 [ 30.349886] __split_vma+0x170/0x950 [ 30.350350] split_vma+0xc6/0x110 [ 30.350827] mprotect_fixup+0x8d2/0xb30 [ 30.351341] do_mprotect_pkey+0x87e/0xd40 [ 30.351867] __x64_sys_mprotect+0x78/0xc0 [ 30.352405] do_syscall_64+0x3f/0x90 [ 30.352894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353567] [ 30.353793] Freed by task 204: [ 30.354181] kasan_save_stack+0x22/0x50 [ 30.354684] kasan_set_track+0x25/0x30 [ 30.355178] kasan_save_free_info+0x2b/0x50 [ 30.355737] __kasan_slab_free+0x10a/0x190 [ 30.356273] kmem_cache_free+0x10d/0x4d0 [ 30.356789] rcu_core+0x8c8/0x2860 [ 30.357237] __do_softirq+0x1b7/0x7d4 [ 30.357731] [ 30.357954] Last potentially related work creation: [ 30.358549] kasan_save_stack+0x22/0x50 [ 30.359058] __kasan_record_aux_stack+0x8e/0xa0 [ 30.359646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.360307] remove_vma+0x139/0x170 [ 30.360764] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.361423] do_vmi_munmap+0x1f1/0x2b0 [ 30.361924] __vm_munmap+0x138/0x3a0 [ 30.362396] __x64_sys_munmap+0x59/0x80 [ 30.362897] do_syscall_64+0x3f/0x90 [ 30.363382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364040] [ 30.364259] The buggy address belongs to the object at ffff88801a353740 [ 30.364259] which belongs to the cache vm_area_struct of size 168 [ 30.365734] The buggy address is located 88 bytes inside of [ 30.365734] freed 168-byte region [ffff88801a353740, ffff88801a3537e8) [ 30.367134] [ 30.367353] The buggy address belongs to the physical page: [ 30.368018] page:0000000000d8b962 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a353 [ 30.369098] memcg:ffff88800d545301 [ 30.369579] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.370252] page_type: 0xffffffff() [ 30.370710] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.371622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d545301 [ 30.372531] page dumped because: kasan: bad access detected [ 30.373205] [ 30.373424] Memory state around the buggy address: [ 30.374016] ffff88801a353680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.374866] ffff88801a353700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.375723] >ffff88801a353780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.376572] ^ [ 30.377067] ffff88801a353800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.377931] ffff88801a353880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.378783] ================================================================== [ 30.379789] Disabling lock debugging due to kernel taint [ 32.446318] BUG: Bad rss-counter state mm:00000000d56fc5c1 type:MM_FILEPAGES val:33 [ 32.447612] BUG: Bad rss-counter state mm:00000000d56fc5c1 type:MM_ANONPAGES val:22 [ 33.011402] BUG: Bad rss-counter state mm:0000000001ddbc1c type:MM_FILEPAGES val:33 [ 33.012589] BUG: Bad rss-counter state mm:0000000001ddbc1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53084' (ECDSA) to the list of known hosts. 2023/06/20 23:45:42 fuzzer started 2023/06/20 23:45:42 dialing manager at localhost:36067 2023/06/20 23:45:42 checking machine... 2023/06/20 23:45:42 checking revisions... [ 33.657066] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:45:42 testing simple program... [ 33.695125] cgroup: Unknown subsys name 'net' [ 33.736682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009ba8000 RCX=0000000000000000 RDX=ffff8880069c5580 RSI=ffff888016698500 RDI=ffff888009ea1c00 RBP=0000000000000000 RSP=ffff88800fe6f4f8 R8 =ffff88800fe6f5a8 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=dffffc0000000000 R15=ffff888009ea1c00 RIP=ffffffff83aacac2 RFL=00000293 [--S-A-C] 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 00007fe7337df900 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=00007fe733d96618 CR3=000000000f06a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007ff7a6f96100 CR3=0000000018312000 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=2031343a35343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000