syzkaller login: [ 30.582912] BUG: Bad rss-counter state mm:0000000094fe6d1a type:MM_FILEPAGES val:33 [ 30.583917] BUG: Bad rss-counter state mm:0000000094fe6d1a type:MM_ANONPAGES val:22 [ 30.754188] ================================================================== [ 30.755144] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.756151] Read of size 8 at addr ffff888019eb6d08 by task sshd/219 [ 30.756971] [ 30.757211] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.758263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.759324] Call Trace: [ 30.759667] [ 30.759971] dump_stack_lvl+0x91/0xf0 [ 30.760496] print_report+0xcc/0x620 [ 30.761016] ? __virt_addr_valid+0x102/0x340 [ 30.761607] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762920] kasan_report+0xbe/0xf0 [ 30.763420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764038] vma_interval_tree_remove+0xc75/0xec0 [ 30.764639] vma_prepare+0xc54/0x11a0 [ 30.765115] __split_vma+0x5af/0x950 [ 30.765584] ? __pfx___split_vma+0x10/0x10 [ 30.766112] ? find_held_lock+0x2c/0x110 [ 30.766630] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.767191] ? lock_is_held_type+0x9f/0x120 [ 30.767752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.768369] ? mtree_range_walk+0x632/0x900 [ 30.768935] ? mas_walk+0x5c7/0x7c0 [ 30.769417] do_vmi_munmap+0x1f1/0x2b0 [ 30.769917] mmap_region+0x1f9/0x2660 [ 30.770399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.770913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.771637] ? __pfx_lock_acquire+0x10/0x10 [ 30.772166] ? __pfx_mmap_region+0x10/0x10 [ 30.772696] ? security_mmap_addr+0x7d/0xa0 [ 30.773230] ? get_unmapped_area+0x1f5/0x3f0 [ 30.773785] do_mmap+0x854/0xf00 [ 30.774224] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.774720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.775291] ksys_mmap_pgoff+0x3af/0x500 [ 30.775803] do_syscall_64+0x3f/0x90 [ 30.776288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776934] RIP: 0033:0x7f6cda92fd82 [ 30.777389] 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 [ 30.779540] RSP: 002b:00007ffc78a0c838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.780453] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cda92fd82 [ 30.781337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cd9d69000 [ 30.782192] RBP: 00007f6cd9d69000 R08: 0000000000000009 R09: 0000000000001000 [ 30.783036] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a946ff7ec0 [ 30.783896] R13: 00007ffc78a0c850 R14: 00007ffc78a0c880 R15: 00007ffc78a0cbe0 [ 30.784758] [ 30.785051] [ 30.785272] Allocated by task 212: [ 30.785706] kasan_save_stack+0x22/0x50 [ 30.786214] kasan_set_track+0x25/0x30 [ 30.786712] __kasan_slab_alloc+0x59/0x70 [ 30.787255] kmem_cache_alloc+0x16b/0x370 [ 30.787780] vm_area_dup+0x20/0x160 [ 30.788238] __split_vma+0x170/0x950 [ 30.788704] split_vma+0xc6/0x110 [ 30.789149] mprotect_fixup+0x8d2/0xb30 [ 30.789655] do_mprotect_pkey+0x87e/0xd40 [ 30.790185] __x64_sys_mprotect+0x78/0xc0 [ 30.790716] do_syscall_64+0x3f/0x90 [ 30.791198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791856] [ 30.792082] Freed by task 19: [ 30.792472] kasan_save_stack+0x22/0x50 [ 30.792986] kasan_set_track+0x25/0x30 [ 30.793481] kasan_save_free_info+0x2b/0x50 [ 30.794025] __kasan_slab_free+0x10a/0x190 [ 30.794558] kmem_cache_free+0x10d/0x4d0 [ 30.795071] rcu_core+0x8c8/0x2860 [ 30.795541] __do_softirq+0x1b7/0x7d4 [ 30.796034] [ 30.796253] Last potentially related work creation: [ 30.796842] kasan_save_stack+0x22/0x50 [ 30.797348] __kasan_record_aux_stack+0x8e/0xa0 [ 30.797935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.798589] remove_vma+0x139/0x170 [ 30.799050] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.799663] do_vmi_munmap+0x1f1/0x2b0 [ 30.800159] __vm_munmap+0x138/0x3a0 [ 30.800644] __x64_sys_munmap+0x59/0x80 [ 30.801158] do_syscall_64+0x3f/0x90 [ 30.801636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802291] [ 30.802511] The buggy address belongs to the object at ffff888019eb6cb0 [ 30.802511] which belongs to the cache vm_area_struct of size 168 [ 30.803984] The buggy address is located 88 bytes inside of [ 30.803984] freed 168-byte region [ffff888019eb6cb0, ffff888019eb6d58) [ 30.805397] [ 30.805616] The buggy address belongs to the physical page: [ 30.806278] page:00000000f135da8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eb6 [ 30.807385] memcg:ffff88800e773d01 [ 30.807817] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808471] page_type: 0xffffffff() [ 30.808920] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.809839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e773d01 [ 30.810748] page dumped because: kasan: bad access detected [ 30.811435] [ 30.811654] Memory state around the buggy address: [ 30.812242] ffff888019eb6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.813103] ffff888019eb6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.813959] >ffff888019eb6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.814821] ^ [ 30.815286] ffff888019eb6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.816147] ffff888019eb6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.817012] ================================================================== [ 30.817949] Disabling lock debugging due to kernel taint [ 32.696112] BUG: Bad rss-counter state mm:00000000e65718c3 type:MM_FILEPAGES val:33 [ 32.697320] BUG: Bad rss-counter state mm:00000000e65718c3 type:MM_ANONPAGES val:22 [ 33.153787] BUG: Bad rss-counter state mm:00000000cfc9c607 type:MM_FILEPAGES val:33 [ 33.154608] BUG: Bad rss-counter state mm:00000000cfc9c607 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44111' (ECDSA) to the list of known hosts. 2023/06/21 03:26:01 fuzzer started 2023/06/21 03:26:02 dialing manager at localhost:36067 2023/06/21 03:26:02 checking machine... 2023/06/21 03:26:02 checking revisions... [ 33.892457] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:26:02 testing simple program... [ 33.937402] cgroup: Unknown subsys name 'net' [ 33.983278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:01 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888015e39b40 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888015e39f34 RBP=ffff888015e39b40 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=00007f6e3dcea74e R13=0000000000000000 R14=ffff888015e39b40 R15=ffff88800de081b0 RIP=ffffffff8135bdf9 RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6e3d870900 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=000055bcf1392738 CR3=000000000e712000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f2db72dc4f0 CR3=000000000cb42000 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=d6dc8f65df3671aea74a743efc86748a XMM02=2c67c8bc2e329bc3000000000011b460 XMM03=fb795ef6d65770560000000000120f38 XMM04=e5f0233c31dc324d00000000000ae988 XMM05=dfcdbad4f1609c370000000000130d98 XMM06=3f094922b61ed9d8000000000012ff70 XMM07=e042d86d42eb936e00000000001211b8 XMM08=6ff0443374abf654000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000