syzkaller login: [ 25.855577] BUG: Bad rss-counter state mm:00000000c8e7b4fd type:MM_FILEPAGES val:33 [ 25.856592] BUG: Bad rss-counter state mm:00000000c8e7b4fd type:MM_ANONPAGES val:22 [ 26.023730] ================================================================== [ 26.024867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.026177] Read of size 8 at addr ffff88800c611880 by task sshd/219 [ 26.027144] [ 26.027443] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.028535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.029811] Call Trace: [ 26.030211] [ 26.030570] dump_stack_lvl+0x91/0xf0 [ 26.031176] print_report+0xcc/0x620 [ 26.031792] ? __virt_addr_valid+0x102/0x340 [ 26.032497] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.033294] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.034066] kasan_report+0xbe/0xf0 [ 26.034672] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.035483] vma_interval_tree_remove+0xc75/0xec0 [ 26.036240] vma_prepare+0xc54/0x11a0 [ 26.036849] __split_vma+0x5af/0x950 [ 26.037461] ? __pfx___split_vma+0x10/0x10 [ 26.038130] ? find_held_lock+0x2c/0x110 [ 26.038792] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.039518] ? lock_is_held_type+0x9f/0x120 [ 26.040196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.040967] ? mtree_range_walk+0x632/0x900 [ 26.041674] ? mas_walk+0x5c7/0x7c0 [ 26.042167] do_vmi_munmap+0x1f1/0x2b0 [ 26.042673] mmap_region+0x1f9/0x2660 [ 26.043166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.043697] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.044440] ? __pfx_lock_acquire+0x10/0x10 [ 26.044999] ? __pfx_mmap_region+0x10/0x10 [ 26.045568] ? security_mmap_addr+0x7d/0xa0 [ 26.046115] ? get_unmapped_area+0x1f5/0x3f0 [ 26.046688] do_mmap+0x854/0xf00 [ 26.047141] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.047651] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.048228] ksys_mmap_pgoff+0x3af/0x500 [ 26.048747] do_syscall_64+0x3f/0x90 [ 26.049235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.049921] RIP: 0033:0x7f9c116d1d82 [ 26.050411] 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 [ 26.052630] RSP: 002b:00007ffe448fbcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.053566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c116d1d82 [ 26.054433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c10b0b000 [ 26.055305] RBP: 00007f9c10b0b000 R08: 0000000000000009 R09: 0000000000001000 [ 26.056182] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603c65d1f70 [ 26.057056] R13: 00007ffe448fbce0 R14: 00007ffe448fbd10 R15: 00007ffe448fc070 [ 26.057963] [ 26.058263] [ 26.058484] Allocated by task 212: [ 26.058925] kasan_save_stack+0x22/0x50 [ 26.059449] kasan_set_track+0x25/0x30 [ 26.059968] __kasan_slab_alloc+0x59/0x70 [ 26.060507] kmem_cache_alloc+0x16b/0x370 [ 26.061035] vm_area_dup+0x20/0x160 [ 26.061510] __split_vma+0x170/0x950 [ 26.062002] split_vma+0xc6/0x110 [ 26.062457] mprotect_fixup+0x8d2/0xb30 [ 26.062980] do_mprotect_pkey+0x87e/0xd40 [ 26.063525] __x64_sys_mprotect+0x78/0xc0 [ 26.064057] do_syscall_64+0x3f/0x90 [ 26.064551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.065204] [ 26.065441] Freed by task 212: [ 26.065847] kasan_save_stack+0x22/0x50 [ 26.066367] kasan_set_track+0x25/0x30 [ 26.066948] kasan_save_free_info+0x2b/0x50 [ 26.067497] __kasan_slab_free+0x10a/0x190 [ 26.068050] kmem_cache_free+0x10d/0x4d0 [ 26.068569] rcu_core+0x8c8/0x2860 [ 26.069029] __do_softirq+0x1b7/0x7d4 [ 26.069537] [ 26.069756] Last potentially related work creation: [ 26.070375] kasan_save_stack+0x22/0x50 [ 26.070898] __kasan_record_aux_stack+0x8e/0xa0 [ 26.071490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.072163] remove_vma+0x139/0x170 [ 26.072615] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.073165] do_vmi_munmap+0x1f1/0x2b0 [ 26.073670] __vm_munmap+0x138/0x3a0 [ 26.074135] __x64_sys_munmap+0x59/0x80 [ 26.074635] do_syscall_64+0x3f/0x90 [ 26.075115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.075759] [ 26.075971] Second to last potentially related work creation: [ 26.076662] kasan_save_stack+0x22/0x50 [ 26.077166] __kasan_record_aux_stack+0x8e/0xa0 [ 26.077767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.078411] remove_vma+0x139/0x170 [ 26.078863] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.079418] do_vmi_munmap+0x1f1/0x2b0 [ 26.079904] mmap_region+0x1f9/0x2660 [ 26.080382] do_mmap+0x854/0xf00 [ 26.080809] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.081301] ksys_mmap_pgoff+0x3af/0x500 [ 26.081800] do_syscall_64+0x3f/0x90 [ 26.082283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.082917] [ 26.083132] The buggy address belongs to the object at ffff88800c611828 [ 26.083132] which belongs to the cache vm_area_struct of size 168 [ 26.084587] The buggy address is located 88 bytes inside of [ 26.084587] freed 168-byte region [ffff88800c611828, ffff88800c6118d0) [ 26.086000] [ 26.086214] The buggy address belongs to the physical page: [ 26.086871] page:00000000df1ef48f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc611 [ 26.087974] memcg:ffff88800e260801 [ 26.088396] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.089085] page_type: 0xffffffff() [ 26.089550] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.090472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e260801 [ 26.091380] page dumped because: kasan: bad access detected [ 26.092036] [ 26.092251] Memory state around the buggy address: [ 26.092823] ffff88800c611780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.093688] ffff88800c611800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.094543] >ffff88800c611880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.095388] ^ [ 26.095794] ffff88800c611900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.096658] ffff88800c611980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 26.097518] ================================================================== [ 26.098450] Disabling lock debugging due to kernel taint [ 28.623300] BUG: Bad rss-counter state mm:00000000a1d85566 type:MM_FILEPAGES val:33 [ 28.624269] BUG: Bad rss-counter state mm:00000000a1d85566 type:MM_ANONPAGES val:22 [ 29.175547] BUG: Bad rss-counter state mm:000000004e461611 type:MM_FILEPAGES val:33 [ 29.176724] BUG: Bad rss-counter state mm:000000004e461611 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49152' (ECDSA) to the list of known hosts. 2023/06/19 21:52:48 fuzzer started 2023/06/19 21:52:48 dialing manager at localhost:44161 2023/06/19 21:52:48 checking machine... 2023/06/19 21:52:48 checking revisions... [ 29.784515] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:52:48 testing simple program... [ 29.833173] cgroup: Unknown subsys name 'net' [ 29.894185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:45 Registers: info registers vcpu 0 RAX=ffff8880103a8798 RBX=ffff8880103a8778 RCX=0000000000000000 RDX=ffff888010363680 RSI=ffffffff816ecbf0 RDI=ffff8880103a8794 RBP=dffffc0000000000 RSP=ffff88801479f538 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff8880103aa000 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff816ecbfd 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 00007f8899614900 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=00007f03491c3650 CR3=000000000cb7e000 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=10246db0180d826600000000000ae988 XMM05=e45c3a81cf091d3600000000001358f0 XMM06=806171799158d9670000000000134370 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffdfb967808 CR3=0000000016674000 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=2037343a32353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000