syzkaller login: [ 26.849485] BUG: Bad rss-counter state mm:00000000eb76a951 type:MM_FILEPAGES val:33 [ 26.850923] BUG: Bad rss-counter state mm:00000000eb76a951 type:MM_ANONPAGES val:22 [ 27.015943] ================================================================== [ 27.017054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.018204] Read of size 8 at addr ffff888015b2f798 by task sshd/219 [ 27.019231] [ 27.019502] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.020598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.021798] Call Trace: [ 27.022181] [ 27.022519] dump_stack_lvl+0x91/0xf0 [ 27.023099] print_report+0xcc/0x620 [ 27.023669] ? __virt_addr_valid+0x102/0x340 [ 27.024357] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.025102] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.025849] kasan_report+0xbe/0xf0 [ 27.026417] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.027174] vma_interval_tree_remove+0xc75/0xec0 [ 27.027903] vma_prepare+0xc54/0x11a0 [ 27.028484] __split_vma+0x5af/0x950 [ 27.029048] ? __pfx___split_vma+0x10/0x10 [ 27.029693] ? find_held_lock+0x2c/0x110 [ 27.030318] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.030989] ? lock_is_held_type+0x9f/0x120 [ 27.031635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.032392] ? mtree_range_walk+0x632/0x900 [ 27.033058] ? mas_walk+0x5c7/0x7c0 [ 27.033623] do_vmi_munmap+0x1f1/0x2b0 [ 27.034215] mmap_region+0x1f9/0x2660 [ 27.034803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.035429] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.036312] ? __pfx_lock_acquire+0x10/0x10 [ 27.036961] ? __pfx_mmap_region+0x10/0x10 [ 27.037605] ? security_mmap_addr+0x7d/0xa0 [ 27.038253] ? get_unmapped_area+0x1f5/0x3f0 [ 27.038920] do_mmap+0x854/0xf00 [ 27.039451] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.040043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.040744] ksys_mmap_pgoff+0x3af/0x500 [ 27.041358] do_syscall_64+0x3f/0x90 [ 27.041938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.042724] RIP: 0033:0x7f37f0d0cd82 [ 27.043284] 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 [ 27.045612] RSP: 002b:00007fff2cdc49d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.046512] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37f0d0cd82 [ 27.047358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37f0146000 [ 27.048209] RBP: 00007f37f0146000 R08: 0000000000000009 R09: 0000000000001000 [ 27.049118] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cd4a5cf70 [ 27.049968] R13: 00007fff2cdc49f0 R14: 00007fff2cdc4a20 R15: 00007fff2cdc4d80 [ 27.050823] [ 27.051119] [ 27.051338] Allocated by task 212: [ 27.051786] kasan_save_stack+0x22/0x50 [ 27.052344] kasan_set_track+0x25/0x30 [ 27.052838] __kasan_slab_alloc+0x59/0x70 [ 27.053362] kmem_cache_alloc+0x16b/0x370 [ 27.053896] vm_area_dup+0x20/0x160 [ 27.054365] __split_vma+0x170/0x950 [ 27.054837] split_vma+0xc6/0x110 [ 27.055280] mprotect_fixup+0x8d2/0xb30 [ 27.055781] do_mprotect_pkey+0x87e/0xd40 [ 27.056317] __x64_sys_mprotect+0x78/0xc0 [ 27.056834] do_syscall_64+0x3f/0x90 [ 27.057314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.057960] [ 27.058178] Freed by task 212: [ 27.058572] kasan_save_stack+0x22/0x50 [ 27.059072] kasan_set_track+0x25/0x30 [ 27.059568] kasan_save_free_info+0x2b/0x50 [ 27.060104] __kasan_slab_free+0x10a/0x190 [ 27.060655] kmem_cache_free+0x10d/0x4d0 [ 27.061159] rcu_core+0x8c8/0x2860 [ 27.061604] __do_softirq+0x1b7/0x7d4 [ 27.062080] [ 27.062298] Last potentially related work creation: [ 27.062886] kasan_save_stack+0x22/0x50 [ 27.063392] __kasan_record_aux_stack+0x8e/0xa0 [ 27.063978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.064644] remove_vma+0x139/0x170 [ 27.065100] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.065660] do_vmi_munmap+0x1f1/0x2b0 [ 27.066144] __vm_munmap+0x138/0x3a0 [ 27.066618] __x64_sys_munmap+0x59/0x80 [ 27.067116] do_syscall_64+0x3f/0x90 [ 27.067593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.068252] [ 27.068476] The buggy address belongs to the object at ffff888015b2f740 [ 27.068476] which belongs to the cache vm_area_struct of size 168 [ 27.069941] The buggy address is located 88 bytes inside of [ 27.069941] freed 168-byte region [ffff888015b2f740, ffff888015b2f7e8) [ 27.071359] [ 27.071575] The buggy address belongs to the physical page: [ 27.072239] page:00000000e31f64ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b2f [ 27.073345] memcg:ffff888017eff801 [ 27.073774] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.074428] page_type: 0xffffffff() [ 27.074885] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.075809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017eff801 [ 27.076733] page dumped because: kasan: bad access detected [ 27.077389] [ 27.077614] Memory state around the buggy address: [ 27.078183] ffff888015b2f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.079040] ffff888015b2f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.079891] >ffff888015b2f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 27.080760] ^ [ 27.081255] ffff888015b2f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 27.082115] ffff888015b2f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 27.082966] ================================================================== [ 27.083952] Disabling lock debugging due to kernel taint [ 29.276283] BUG: Bad rss-counter state mm:00000000a1e96b5f type:MM_FILEPAGES val:33 [ 29.277218] BUG: Bad rss-counter state mm:00000000a1e96b5f type:MM_ANONPAGES val:22 [ 29.825354] BUG: Bad rss-counter state mm:00000000e0e0b903 type:MM_FILEPAGES val:33 [ 29.826567] BUG: Bad rss-counter state mm:00000000e0e0b903 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44678' (ECDSA) to the list of known hosts. 2023/06/19 14:28:12 fuzzer started 2023/06/19 14:28:12 dialing manager at localhost:44161 2023/06/19 14:28:12 checking machine... 2023/06/19 14:28:12 checking revisions... [ 30.565853] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:28:12 testing simple program... [ 30.614759] cgroup: Unknown subsys name 'net' [ 30.655777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:08 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00007faf4418a366 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007faf4418a366 RSP=ffff88800daa77f8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007faf4418a000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800dafd1c0 R15=ffff8880158314c0 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 00007faf43c97900 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=00007faf4424e618 CR3=00000000158cc000 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=00007fd82d412700 CR3=0000000009888000 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=869431eda7a07583df462dc32283e106 XMM02=2c67c8bc2e329bc3000000000011c940 XMM03=fb795ef6d65770560000000000123388 XMM04=aca52c965d10d57e00000000000ae988 XMM05=dfcdbad4f1609c370000000000132f18 XMM06=2cded3f83a81c77e00000000001320f0 XMM07=e042d86d42eb936e0000000000123608 XMM08=4f000ad1e591bf28000000000011c9a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000