syzkaller login: [ 31.552134] BUG: Bad rss-counter state mm:00000000ac671755 type:MM_FILEPAGES val:33 [ 31.553230] BUG: Bad rss-counter state mm:00000000ac671755 type:MM_ANONPAGES val:22 [ 31.652473] ================================================================== [ 31.653669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.655043] Read of size 8 at addr ffff888015a465c8 by task sshd/219 [ 31.655837] [ 31.655980] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.656542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.657195] Call Trace: [ 31.657403] [ 31.657590] dump_stack_lvl+0x91/0xf0 [ 31.657923] print_report+0xcc/0x620 [ 31.658237] ? __virt_addr_valid+0x102/0x340 [ 31.658606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659022] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659429] kasan_report+0xbe/0xf0 [ 31.659739] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.660150] vma_interval_tree_remove+0xc75/0xec0 [ 31.660543] vma_prepare+0xc54/0x11a0 [ 31.660857] __split_vma+0x5af/0x950 [ 31.661170] ? __pfx___split_vma+0x10/0x10 [ 31.661520] ? find_held_lock+0x2c/0x110 [ 31.661857] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.662231] ? lock_is_held_type+0x9f/0x120 [ 31.662579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.662972] ? mtree_range_walk+0x632/0x900 [ 31.663329] ? mas_walk+0x5c7/0x7c0 [ 31.663631] do_vmi_munmap+0x1f1/0x2b0 [ 31.663947] mmap_region+0x1f9/0x2660 [ 31.664261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.664597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.665068] ? __pfx_lock_acquire+0x10/0x10 [ 31.665426] ? __pfx_mmap_region+0x10/0x10 [ 31.665773] ? security_mmap_addr+0x7d/0xa0 [ 31.666118] ? get_unmapped_area+0x1f5/0x3f0 [ 31.666476] do_mmap+0x854/0xf00 [ 31.666764] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.667087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.667454] ksys_mmap_pgoff+0x3af/0x500 [ 31.667786] do_syscall_64+0x3f/0x90 [ 31.668097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.668523] RIP: 0033:0x7f3553f63d82 [ 31.668820] 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 [ 31.670237] RSP: 002b:00007ffdb8a31528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.670832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3553f63d82 [ 31.671386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f355339d000 [ 31.671940] RBP: 00007f355339d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.672491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3454d1ec0 [ 31.673053] R13: 00007ffdb8a31540 R14: 00007ffdb8a31570 R15: 00007ffdb8a318d0 [ 31.673615] [ 31.673802] [ 31.673940] Allocated by task 212: [ 31.674217] kasan_save_stack+0x22/0x50 [ 31.674545] kasan_set_track+0x25/0x30 [ 31.674861] __kasan_slab_alloc+0x59/0x70 [ 31.675206] kmem_cache_alloc+0x16b/0x370 [ 31.675539] vm_area_dup+0x20/0x160 [ 31.675832] __split_vma+0x170/0x950 [ 31.676133] split_vma+0xc6/0x110 [ 31.676416] mprotect_fixup+0x8d2/0xb30 [ 31.676746] do_mprotect_pkey+0x87e/0xd40 [ 31.677082] __x64_sys_mprotect+0x78/0xc0 [ 31.677435] do_syscall_64+0x3f/0x90 [ 31.677734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.678141] [ 31.678281] Freed by task 212: [ 31.678541] kasan_save_stack+0x22/0x50 [ 31.678857] kasan_set_track+0x25/0x30 [ 31.679172] kasan_save_free_info+0x2b/0x50 [ 31.679510] __kasan_slab_free+0x10a/0x190 [ 31.679849] kmem_cache_free+0x10d/0x4d0 [ 31.680173] rcu_core+0x8c8/0x2860 [ 31.680459] __do_softirq+0x1b7/0x7d4 [ 31.680768] [ 31.680903] Last potentially related work creation: [ 31.681300] kasan_save_stack+0x22/0x50 [ 31.681630] __kasan_record_aux_stack+0x8e/0xa0 [ 31.682002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.682417] remove_vma+0x139/0x170 [ 31.682715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.683075] do_vmi_munmap+0x1f1/0x2b0 [ 31.683388] __vm_munmap+0x138/0x3a0 [ 31.683692] __x64_sys_munmap+0x59/0x80 [ 31.684014] do_syscall_64+0x3f/0x90 [ 31.684323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.684738] [ 31.684875] Second to last potentially related work creation: [ 31.685322] kasan_save_stack+0x22/0x50 [ 31.685650] __kasan_record_aux_stack+0x8e/0xa0 [ 31.686022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.686441] remove_vma+0x139/0x170 [ 31.686742] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.687100] do_vmi_munmap+0x1f1/0x2b0 [ 31.687414] mmap_region+0x1f9/0x2660 [ 31.687720] do_mmap+0x854/0xf00 [ 31.687998] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.688312] ksys_mmap_pgoff+0x3af/0x500 [ 31.688635] do_syscall_64+0x3f/0x90 [ 31.688938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689372] [ 31.689511] The buggy address belongs to the object at ffff888015a46570 [ 31.689511] which belongs to the cache vm_area_struct of size 168 [ 31.690470] The buggy address is located 88 bytes inside of [ 31.690470] freed 168-byte region [ffff888015a46570, ffff888015a46618) [ 31.691388] [ 31.691526] The buggy address belongs to the physical page: [ 31.691952] page:000000004f43a0af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a46 [ 31.692668] memcg:ffff8880168c3f01 [ 31.692946] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.693406] page_type: 0xffffffff() [ 31.693703] raw: 0100000000000200 ffff88800879fc80 ffffea0000361f80 0000000000000003 [ 31.694311] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168c3f01 [ 31.694893] page dumped because: kasan: bad access detected [ 31.695325] [ 31.695523] Memory state around the buggy address: [ 31.695906] ffff888015a46480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.696468] ffff888015a46500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.697026] >ffff888015a46580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.697602] ^ [ 31.698032] ffff888015a46600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.698592] ffff888015a46680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.699152] ================================================================== [ 31.699733] Disabling lock debugging due to kernel taint [ 33.683317] BUG: Bad rss-counter state mm:000000004dec49b8 type:MM_FILEPAGES val:33 [ 33.684602] BUG: Bad rss-counter state mm:000000004dec49b8 type:MM_ANONPAGES val:22 [ 34.211333] BUG: Bad rss-counter state mm:0000000041e3a09b type:MM_FILEPAGES val:33 [ 34.212330] BUG: Bad rss-counter state mm:0000000041e3a09b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64446' (ECDSA) to the list of known hosts. 2023/06/19 21:54:26 fuzzer started 2023/06/19 21:54:27 dialing manager at localhost:44161 2023/06/19 21:54:27 checking machine... 2023/06/19 21:54:27 checking revisions... [ 34.799962] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:54:27 testing simple program... [ 34.846428] cgroup: Unknown subsys name 'net' [ 34.893351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028e6f38 RSI=ffffffff846000aa RDI=ffff8880147379c0 RBP=ffff888014737a58 RSP=ffff888014737998 R8 =0000000000000001 R9 =ffff888014737a00 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888014737a88 R13=0000000000000000 R14=ffff888006b43680 R15=ffff8880147379c0 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007fd2838fc900 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=00007f7da940b650 CR3=000000000cb2a000 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=79b3378b0c1318b500000000000ae988 XMM05=17eac60eddb9dc3500000000001360d0 XMM06=806171799158d9670000000000134ec0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf2c240 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813fdc2e RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888008e27e50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=ffff888008d751c0 R15=0000000000000000 RIP=ffffffff814c081b RFL=00000046 [---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 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=00007ffea7fdc678 CR3=00000000145f0000 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=2036323a34353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000