syzkaller login: [ 30.619490] BUG: Bad rss-counter state mm:000000003330104e type:MM_FILEPAGES val:33 [ 30.620765] BUG: Bad rss-counter state mm:000000003330104e type:MM_ANONPAGES val:22 [ 30.682302] ================================================================== [ 30.683275] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.684400] Read of size 8 at addr ffff88800dbda4e0 by task sshd/220 [ 30.685236] [ 30.685468] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.686406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.687456] Call Trace: [ 30.687803] [ 30.688109] dump_stack_lvl+0x91/0xf0 [ 30.688656] print_report+0xcc/0x620 [ 30.689190] ? __virt_addr_valid+0x102/0x340 [ 30.689789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690454] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.691124] kasan_report+0xbe/0xf0 [ 30.691635] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.692333] vma_interval_tree_remove+0xc75/0xec0 [ 30.693019] vma_prepare+0xc54/0x11a0 [ 30.693548] __split_vma+0x5af/0x950 [ 30.694076] ? __pfx___split_vma+0x10/0x10 [ 30.694667] ? find_held_lock+0x2c/0x110 [ 30.695212] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.695797] ? lock_is_held_type+0x9f/0x120 [ 30.696345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.696962] ? mtree_range_walk+0x632/0x900 [ 30.697528] ? mas_walk+0x5c7/0x7c0 [ 30.698007] do_vmi_munmap+0x1f1/0x2b0 [ 30.698498] mmap_region+0x1f9/0x2660 [ 30.698981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.699493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.700226] ? __pfx_lock_acquire+0x10/0x10 [ 30.700782] ? __pfx_mmap_region+0x10/0x10 [ 30.701319] ? security_mmap_addr+0x7d/0xa0 [ 30.701864] ? get_unmapped_area+0x1f5/0x3f0 [ 30.702415] do_mmap+0x854/0xf00 [ 30.702858] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.703354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.703915] ksys_mmap_pgoff+0x3af/0x500 [ 30.704429] do_syscall_64+0x3f/0x90 [ 30.704933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705651] RIP: 0033:0x7f5974ad6d82 [ 30.706156] 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 [ 30.708536] RSP: 002b:00007ffc094bf0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.709561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5974ad6d82 [ 30.710499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5973f10000 [ 30.711438] RBP: 00007f5973f10000 R08: 0000000000000009 R09: 0000000000001000 [ 30.712384] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2a0c03ec0 [ 30.713334] R13: 00007ffc094bf100 R14: 00007ffc094bf130 R15: 00007ffc094bf490 [ 30.714291] [ 30.714618] [ 30.714858] Allocated by task 213: [ 30.715346] kasan_save_stack+0x22/0x50 [ 30.715924] kasan_set_track+0x25/0x30 [ 30.716473] __kasan_slab_alloc+0x59/0x70 [ 30.717069] kmem_cache_alloc+0x16b/0x370 [ 30.717642] vm_area_dup+0x20/0x160 [ 30.718148] __split_vma+0x170/0x950 [ 30.718666] split_vma+0xc6/0x110 [ 30.719159] mprotect_fixup+0x8d2/0xb30 [ 30.719715] do_mprotect_pkey+0x87e/0xd40 [ 30.720289] __x64_sys_mprotect+0x78/0xc0 [ 30.720889] do_syscall_64+0x3f/0x90 [ 30.721413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722128] [ 30.722366] Freed by task 203: [ 30.722805] kasan_save_stack+0x22/0x50 [ 30.723365] kasan_set_track+0x25/0x30 [ 30.723914] kasan_save_free_info+0x2b/0x50 [ 30.724504] __kasan_slab_free+0x10a/0x190 [ 30.725108] kmem_cache_free+0x10d/0x4d0 [ 30.725669] rcu_core+0x8c8/0x2860 [ 30.726160] __do_softirq+0x1b7/0x7d4 [ 30.726688] [ 30.726929] Last potentially related work creation: [ 30.727573] kasan_save_stack+0x22/0x50 [ 30.728135] __kasan_record_aux_stack+0x8e/0xa0 [ 30.728782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.729499] remove_vma+0x139/0x170 [ 30.730001] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.730619] do_vmi_munmap+0x1f1/0x2b0 [ 30.731156] __vm_munmap+0x138/0x3a0 [ 30.731678] __x64_sys_munmap+0x59/0x80 [ 30.732233] do_syscall_64+0x3f/0x90 [ 30.732775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733493] [ 30.733736] The buggy address belongs to the object at ffff88800dbda488 [ 30.733736] which belongs to the cache vm_area_struct of size 168 [ 30.735422] The buggy address is located 88 bytes inside of [ 30.735422] freed 168-byte region [ffff88800dbda488, ffff88800dbda530) [ 30.737079] [ 30.737331] The buggy address belongs to the physical page: [ 30.738107] page:000000008427c783 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbda [ 30.739376] memcg:ffff8880165b2201 [ 30.739872] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.740639] page_type: 0xffffffff() [ 30.741171] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.742246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165b2201 [ 30.743249] page dumped because: kasan: bad access detected [ 30.743924] [ 30.744139] Memory state around the buggy address: [ 30.744739] ffff88800dbda380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.745598] ffff88800dbda400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.746459] >ffff88800dbda480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.747318] ^ [ 30.748077] ffff88800dbda500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.748972] ffff88800dbda580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.749851] ================================================================== [ 30.751026] Disabling lock debugging due to kernel taint [ 33.038974] BUG: Bad rss-counter state mm:0000000094be7bb7 type:MM_FILEPAGES val:33 [ 33.040125] BUG: Bad rss-counter state mm:0000000094be7bb7 type:MM_ANONPAGES val:22 [ 33.443350] BUG: Bad rss-counter state mm:00000000d6f2da2b type:MM_FILEPAGES val:33 [ 33.444649] BUG: Bad rss-counter state mm:00000000d6f2da2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39239' (ECDSA) to the list of known hosts. 2023/06/20 03:50:20 fuzzer started 2023/06/20 03:50:20 dialing manager at localhost:44161 2023/06/20 03:50:20 checking machine... 2023/06/20 03:50:20 checking revisions... [ 34.129497] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:50:20 testing simple program... [ 34.169636] cgroup: Unknown subsys name 'net' [ 34.218029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:50:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fbf0caf0230 CR3=000000000c476000 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=b106f5fc18775fb9994dfe1576130838 XMM02=000000000011d1c8d59e07bde36eea69 XMM03=000000000011d2f0ec2efd57dc4c00df XMM04=880f71e8038db4f800000000000ae988 XMM05=6e30c4e82b33a3c60000000000134b90 XMM06=c291bd5c70af25b90000000000133980 XMM07=fb795ef6d657705600000000001238a8 XMM08=2c67c8bc2e329bc3000000000011d2f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff888016a8d1c0 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019c4f378 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000000 RIP=ffffffff8450bdca 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 00007fd0e48e2900 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=00007fd0e4e99618 CR3=0000000009d40000 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