syzkaller login: [ 31.168675] BUG: Bad rss-counter state mm:00000000eb43d821 type:MM_FILEPAGES val:33 [ 31.170698] BUG: Bad rss-counter state mm:00000000eb43d821 type:MM_ANONPAGES val:22 [ 31.342045] ================================================================== [ 31.343031] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.344009] Read of size 8 at addr ffff888010228df0 by task sshd/221 [ 31.345007] [ 31.345238] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.346156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.347201] Call Trace: [ 31.347541] [ 31.347844] dump_stack_lvl+0x91/0xf0 [ 31.348357] print_report+0xcc/0x620 [ 31.348873] ? __virt_addr_valid+0x102/0x340 [ 31.349477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350773] kasan_report+0xbe/0xf0 [ 31.351281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351938] vma_interval_tree_remove+0xc75/0xec0 [ 31.352585] vma_prepare+0xc54/0x11a0 [ 31.353099] __split_vma+0x5af/0x950 [ 31.353607] ? __pfx___split_vma+0x10/0x10 [ 31.354165] ? find_held_lock+0x2c/0x110 [ 31.354720] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.355310] ? lock_is_held_type+0x9f/0x120 [ 31.355884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.356531] ? mtree_range_walk+0x632/0x900 [ 31.357131] ? mas_walk+0x5c7/0x7c0 [ 31.357633] do_vmi_munmap+0x1f1/0x2b0 [ 31.358154] mmap_region+0x1f9/0x2660 [ 31.358665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.359209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.359964] ? __pfx_lock_acquire+0x10/0x10 [ 31.360528] ? __pfx_mmap_region+0x10/0x10 [ 31.361100] ? security_mmap_addr+0x7d/0xa0 [ 31.361666] ? get_unmapped_area+0x1f5/0x3f0 [ 31.362248] do_mmap+0x854/0xf00 [ 31.362712] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.363240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.363841] ksys_mmap_pgoff+0x3af/0x500 [ 31.364382] do_syscall_64+0x3f/0x90 [ 31.364883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365590] RIP: 0033:0x7f42ddb5fd82 [ 31.366075] 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 [ 31.368325] RSP: 002b:00007ffd248711a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.369296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42ddb5fd82 [ 31.370198] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42dcf99000 [ 31.371108] RBP: 00007f42dcf99000 R08: 0000000000000009 R09: 0000000000001000 [ 31.372018] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e819026b20 [ 31.372942] R13: 00007ffd248711c0 R14: 00007ffd248711f0 R15: 00007ffd24871550 [ 31.373873] [ 31.374181] [ 31.374418] Allocated by task 214: [ 31.374870] kasan_save_stack+0x22/0x50 [ 31.375419] kasan_set_track+0x25/0x30 [ 31.375942] __kasan_slab_alloc+0x59/0x70 [ 31.376510] kmem_cache_alloc+0x16b/0x370 [ 31.377094] vm_area_dup+0x20/0x160 [ 31.377572] __split_vma+0x170/0x950 [ 31.378061] split_vma+0xc6/0x110 [ 31.378535] mprotect_fixup+0x8d2/0xb30 [ 31.379067] do_mprotect_pkey+0x87e/0xd40 [ 31.379619] __x64_sys_mprotect+0x78/0xc0 [ 31.380171] do_syscall_64+0x3f/0x90 [ 31.380680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381361] [ 31.381595] Freed by task 214: [ 31.382008] kasan_save_stack+0x22/0x50 [ 31.382547] kasan_set_track+0x25/0x30 [ 31.383068] kasan_save_free_info+0x2b/0x50 [ 31.383639] __kasan_slab_free+0x10a/0x190 [ 31.384207] kmem_cache_free+0x10d/0x4d0 [ 31.384745] rcu_core+0x8c8/0x2860 [ 31.385223] __do_softirq+0x1b7/0x7d4 [ 31.385825] [ 31.386075] Last potentially related work creation: [ 31.386696] kasan_save_stack+0x22/0x50 [ 31.387224] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.388520] remove_vma+0x139/0x170 [ 31.389021] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.389618] do_vmi_munmap+0x1f1/0x2b0 [ 31.390141] __vm_munmap+0x138/0x3a0 [ 31.390636] __x64_sys_munmap+0x59/0x80 [ 31.391171] do_syscall_64+0x3f/0x90 [ 31.391674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392355] [ 31.392580] The buggy address belongs to the object at ffff888010228d98 [ 31.392580] which belongs to the cache vm_area_struct of size 168 [ 31.394153] The buggy address is located 88 bytes inside of [ 31.394153] freed 168-byte region [ffff888010228d98, ffff888010228e40) [ 31.395627] [ 31.395860] The buggy address belongs to the physical page: [ 31.396557] page:00000000883cd7cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10228 [ 31.397736] memcg:ffff8880198b0501 [ 31.398189] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.398869] page_type: 0xffffffff() [ 31.399345] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.400328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198b0501 [ 31.401287] page dumped because: kasan: bad access detected [ 31.401984] [ 31.402217] Memory state around the buggy address: [ 31.402844] ffff888010228c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.403758] ffff888010228d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.404667] >ffff888010228d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.405609] ^ [ 31.406482] ffff888010228e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.407397] ffff888010228e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.408322] ================================================================== [ 31.409376] Disabling lock debugging due to kernel taint [ 33.571584] BUG: Bad rss-counter state mm:000000005bd9556e type:MM_FILEPAGES val:33 [ 33.572559] BUG: Bad rss-counter state mm:000000005bd9556e type:MM_ANONPAGES val:22 [ 34.108451] BUG: Bad rss-counter state mm:00000000d658366e type:MM_FILEPAGES val:33 [ 34.109643] BUG: Bad rss-counter state mm:00000000d658366e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20494' (ECDSA) to the list of known hosts. 2023/06/20 07:39:20 fuzzer started 2023/06/20 07:39:21 dialing manager at localhost:44161 2023/06/20 07:39:21 checking machine... 2023/06/20 07:39:21 checking revisions... [ 34.754436] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:39:21 testing simple program... [ 34.806613] cgroup: Unknown subsys name 'net' [ 34.861156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000572440 RCX=0000000000000000 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff8880146efcf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea000026d600 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff8180c49b RFL=00000282 [--S----] 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 00007f9b7dd63900 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=00007f9b7d1f13f0 CR3=000000000f0fa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=27452574bc336cbd00000000000ae988 XMM05=fa49f2609fe7345500000000001354e8 XMM06=c291bd5c70af25b900000000001342d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019e701d0 RCX=ffff888019e701d0 RDX=000000008011000f RSI=ffff888019e701d0 RDI=ffff88800879fc80 RBP=ffff88801ca0fc88 RSP=ffff88801ca0fbf0 R8 =000000008011000e R9 =0000000000000000 R10=ffffea0000679c00 R11=000000008012000b R12=ffffea0000679c00 R13=ffff888019e700e8 R14=000000008011000e R15=ffff88800879fc80 RIP=ffffffff818094f2 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 00007f5e6009b900 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=00007f5e60652618 CR3=000000000e5d8000 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=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