syzkaller login: [ 57.943543] BUG: Bad rss-counter state mm:000000000e732d35 type:MM_FILEPAGES val:33 [ 57.944555] BUG: Bad rss-counter state mm:000000000e732d35 type:MM_ANONPAGES val:22 [ 58.109829] ================================================================== [ 58.110729] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.111652] Read of size 8 at addr ffff88800e12f228 by task sshd/220 [ 58.112427] [ 58.112640] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.113816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.114797] Call Trace: [ 58.115111] [ 58.115396] dump_stack_lvl+0x91/0xf0 [ 58.115899] print_report+0xcc/0x620 [ 58.116391] ? __virt_addr_valid+0x102/0x340 [ 58.116936] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.117556] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.118168] kasan_report+0xbe/0xf0 [ 58.118659] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.119279] vma_interval_tree_remove+0xc75/0xec0 [ 58.119883] vma_prepare+0xc54/0x11a0 [ 58.120368] __split_vma+0x5af/0x950 [ 58.120835] ? __pfx___split_vma+0x10/0x10 [ 58.121363] ? find_held_lock+0x2c/0x110 [ 58.121880] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.122441] ? lock_is_held_type+0x9f/0x120 [ 58.122979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.123582] ? mtree_range_walk+0x632/0x900 [ 58.124132] ? mas_walk+0x5c7/0x7c0 [ 58.124628] do_vmi_munmap+0x1f1/0x2b0 [ 58.125120] mmap_region+0x1f9/0x2660 [ 58.125598] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.126107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.126814] ? __pfx_lock_acquire+0x10/0x10 [ 58.127353] ? __pfx_mmap_region+0x10/0x10 [ 58.127909] ? security_mmap_addr+0x7d/0xa0 [ 58.128470] ? get_unmapped_area+0x1f5/0x3f0 [ 58.129046] do_mmap+0x854/0xf00 [ 58.129508] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.130016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.130599] ksys_mmap_pgoff+0x3af/0x500 [ 58.131123] do_syscall_64+0x3f/0x90 [ 58.131615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.132292] RIP: 0033:0x7f27cbe85d82 [ 58.132765] 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 [ 58.134965] RSP: 002b:00007ffd411c1388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.135899] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27cbe85d82 [ 58.136791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27cb2bf000 [ 58.137667] RBP: 00007f27cb2bf000 R08: 0000000000000009 R09: 0000000000001000 [ 58.138535] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645437dcf60 [ 58.139406] R13: 00007ffd411c13a0 R14: 00007ffd411c13d0 R15: 00007ffd411c1730 [ 58.140295] [ 58.140597] [ 58.140818] Allocated by task 213: [ 58.141268] kasan_save_stack+0x22/0x50 [ 58.141782] kasan_set_track+0x25/0x30 [ 58.142301] __kasan_slab_alloc+0x59/0x70 [ 58.142840] kmem_cache_alloc+0x16b/0x370 [ 58.143372] vm_area_dup+0x20/0x160 [ 58.143844] __split_vma+0x170/0x950 [ 58.144347] split_vma+0xc6/0x110 [ 58.144801] mprotect_fixup+0x8d2/0xb30 [ 58.145317] do_mprotect_pkey+0x87e/0xd40 [ 58.145849] __x64_sys_mprotect+0x78/0xc0 [ 58.146384] do_syscall_64+0x3f/0x90 [ 58.146876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.147542] [ 58.147765] Freed by task 19: [ 58.148160] kasan_save_stack+0x22/0x50 [ 58.148693] kasan_set_track+0x25/0x30 [ 58.149214] kasan_save_free_info+0x2b/0x50 [ 58.149766] __kasan_slab_free+0x10a/0x190 [ 58.150319] kmem_cache_free+0x10d/0x4d0 [ 58.150841] rcu_core+0x8c8/0x2860 [ 58.151294] __do_softirq+0x1b7/0x7d4 [ 58.151780] [ 58.152005] Last potentially related work creation: [ 58.152628] kasan_save_stack+0x22/0x50 [ 58.153152] __kasan_record_aux_stack+0x8e/0xa0 [ 58.153740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.154469] remove_vma+0x139/0x170 [ 58.154940] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.155518] do_vmi_munmap+0x1f1/0x2b0 [ 58.156016] __vm_munmap+0x138/0x3a0 [ 58.156499] __x64_sys_munmap+0x59/0x80 [ 58.157011] do_syscall_64+0x3f/0x90 [ 58.157493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.158154] [ 58.158379] The buggy address belongs to the object at ffff88800e12f1d0 [ 58.158379] which belongs to the cache vm_area_struct of size 168 [ 58.159906] The buggy address is located 88 bytes inside of [ 58.159906] freed 168-byte region [ffff88800e12f1d0, ffff88800e12f278) [ 58.161364] [ 58.161586] The buggy address belongs to the physical page: [ 58.162264] page:000000005630d37b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe12f [ 58.163382] memcg:ffff88800ce4e801 [ 58.163826] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.164510] page_type: 0xffffffff() [ 58.164972] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 58.165931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce4e801 [ 58.166869] page dumped because: kasan: bad access detected [ 58.167544] [ 58.167764] Memory state around the buggy address: [ 58.168373] ffff88800e12f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.169261] ffff88800e12f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 58.170146] >ffff88800e12f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 58.171030] ^ [ 58.171600] ffff88800e12f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 58.172494] ffff88800e12f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 58.173378] ================================================================== [ 58.174356] Disabling lock debugging due to kernel taint [ 60.054554] BUG: Bad rss-counter state mm:000000004c827036 type:MM_FILEPAGES val:33 [ 60.055763] BUG: Bad rss-counter state mm:000000004c827036 type:MM_ANONPAGES val:22 [ 60.553546] BUG: Bad rss-counter state mm:00000000e70a850f type:MM_FILEPAGES val:33 [ 60.554489] BUG: Bad rss-counter state mm:00000000e70a850f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22941' (ECDSA) to the list of known hosts. 2023/06/20 06:56:02 fuzzer started 2023/06/20 06:56:03 dialing manager at localhost:44161 2023/06/20 06:56:03 checking machine... 2023/06/20 06:56:03 checking revisions... [ 61.318952] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:56:03 testing simple program... [ 61.365922] cgroup: Unknown subsys name 'net' [ 61.431551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff8609fb01 RDX=1ffff1100d9c135e RSI=ffffffff8450b05e RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014739b40 R15=ffff88800d0fd2e0 RIP=ffffffff813ad42e 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 00007f1972fb0900 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=00007f1973567618 CR3=000000000e4d8000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f67f830eb60 CR3=000000000c558000 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=9b9cb12bb944d0961948cc97ca1cdf89 XMM02=0000000000128460eff9b2d0a8fce9cb XMM03=00000000001285302c67c8bc2e329bc3 XMM04=0e668d5045c20c9800000000000ae988 XMM05=19e9129bd510f235000000000013c6a0 XMM06=0503d609966ff2af000000000013b508 XMM07=e042d86d42eb936e000000000012cef0 XMM08=869a2ac65c19d0b80000000000128530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000