syzkaller login: [ 37.569578] BUG: Bad rss-counter state mm:0000000031eaca04 type:MM_FILEPAGES val:33 [ 37.570889] BUG: Bad rss-counter state mm:0000000031eaca04 type:MM_ANONPAGES val:22 [ 37.723607] ================================================================== [ 37.724627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.725657] Read of size 8 at addr ffff88800d874968 by task sshd/219 [ 37.726575] [ 37.726830] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.727809] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.728885] Call Trace: [ 37.729236] [ 37.729559] dump_stack_lvl+0x91/0xf0 [ 37.730113] print_report+0xcc/0x620 [ 37.730664] ? __virt_addr_valid+0x102/0x340 [ 37.731271] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.731979] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.732674] kasan_report+0xbe/0xf0 [ 37.733210] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.733917] vma_interval_tree_remove+0xc75/0xec0 [ 37.734611] vma_prepare+0xc54/0x11a0 [ 37.735161] __split_vma+0x5af/0x950 [ 37.735730] ? __pfx___split_vma+0x10/0x10 [ 37.736348] ? find_held_lock+0x2c/0x110 [ 37.736951] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.737610] ? lock_is_held_type+0x9f/0x120 [ 37.738227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.738936] ? mtree_range_walk+0x632/0x900 [ 37.739600] ? mas_walk+0x5c7/0x7c0 [ 37.740152] do_vmi_munmap+0x1f1/0x2b0 [ 37.740720] mmap_region+0x1f9/0x2660 [ 37.741275] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.741873] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.742709] ? __pfx_lock_acquire+0x10/0x10 [ 37.743328] ? __pfx_mmap_region+0x10/0x10 [ 37.743952] ? security_mmap_addr+0x7d/0xa0 [ 37.744573] ? get_unmapped_area+0x1f5/0x3f0 [ 37.745207] do_mmap+0x854/0xf00 [ 37.745715] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.746287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.746945] ksys_mmap_pgoff+0x3af/0x500 [ 37.747540] do_syscall_64+0x3f/0x90 [ 37.748108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.748856] RIP: 0033:0x7f7c319dfd82 [ 37.749379] 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 [ 37.751865] RSP: 002b:00007fff5c086fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.752916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c319dfd82 [ 37.753907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c30e19000 [ 37.754900] RBP: 00007f7c30e19000 R08: 0000000000000009 R09: 0000000000001000 [ 37.755894] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b12fdaeec0 [ 37.756875] R13: 00007fff5c086fe0 R14: 00007fff5c087010 R15: 00007fff5c087370 [ 37.757872] [ 37.758210] [ 37.758458] Allocated by task 212: [ 37.758934] kasan_save_stack+0x22/0x50 [ 37.759501] kasan_set_track+0x25/0x30 [ 37.760083] __kasan_slab_alloc+0x59/0x70 [ 37.760662] kmem_cache_alloc+0x16b/0x370 [ 37.761265] vm_area_dup+0x20/0x160 [ 37.761792] __split_vma+0x170/0x950 [ 37.762333] split_vma+0xc6/0x110 [ 37.762834] mprotect_fixup+0x8d2/0xb30 [ 37.763408] do_mprotect_pkey+0x87e/0xd40 [ 37.764020] __x64_sys_mprotect+0x78/0xc0 [ 37.764593] do_syscall_64+0x3f/0x90 [ 37.765125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.765815] [ 37.766037] Freed by task 212: [ 37.766429] kasan_save_stack+0x22/0x50 [ 37.766935] kasan_set_track+0x25/0x30 [ 37.767422] kasan_save_free_info+0x2b/0x50 [ 37.767988] __kasan_slab_free+0x10a/0x190 [ 37.768519] kmem_cache_free+0x10d/0x4d0 [ 37.769026] rcu_core+0x8c8/0x2860 [ 37.769464] __do_softirq+0x1b7/0x7d4 [ 37.769944] [ 37.770160] Last potentially related work creation: [ 37.770736] kasan_save_stack+0x22/0x50 [ 37.771237] __kasan_record_aux_stack+0x8e/0xa0 [ 37.771817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.772456] remove_vma+0x139/0x170 [ 37.772904] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.773460] do_vmi_munmap+0x1f1/0x2b0 [ 37.773942] __vm_munmap+0x138/0x3a0 [ 37.774407] __x64_sys_munmap+0x59/0x80 [ 37.774902] do_syscall_64+0x3f/0x90 [ 37.775367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.776006] [ 37.776222] Second to last potentially related work creation: [ 37.776893] kasan_save_stack+0x22/0x50 [ 37.777394] __kasan_record_aux_stack+0x8e/0xa0 [ 37.777974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.778612] remove_vma+0x139/0x170 [ 37.779064] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.779651] do_vmi_munmap+0x1f1/0x2b0 [ 37.780149] mmap_region+0x1f9/0x2660 [ 37.780625] do_mmap+0x854/0xf00 [ 37.781059] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.781543] ksys_mmap_pgoff+0x3af/0x500 [ 37.782044] do_syscall_64+0x3f/0x90 [ 37.782518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.783166] [ 37.783380] The buggy address belongs to the object at ffff88800d874910 [ 37.783380] which belongs to the cache vm_area_struct of size 168 [ 37.784870] The buggy address is located 88 bytes inside of [ 37.784870] freed 168-byte region [ffff88800d874910, ffff88800d8749b8) [ 37.786265] [ 37.786479] The buggy address belongs to the physical page: [ 37.787137] page:00000000716cd737 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd874 [ 37.788222] memcg:ffff88800e87c801 [ 37.788641] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.789285] page_type: 0xffffffff() [ 37.789732] raw: 0100000000000200 ffff88800879fc80 ffffea0000314040 dead000000000002 [ 37.790653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87c801 [ 37.791544] page dumped because: kasan: bad access detected [ 37.792216] [ 37.792433] Memory state around the buggy address: [ 37.793011] ffff88800d874800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.793867] ffff88800d874880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.794714] >ffff88800d874900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.795562] ^ [ 37.796345] ffff88800d874980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.797192] ffff88800d874a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.798036] ================================================================== [ 37.799004] Disabling lock debugging due to kernel taint [ 39.327114] BUG: Bad rss-counter state mm:000000004997f34c type:MM_FILEPAGES val:33 [ 39.327766] BUG: Bad rss-counter state mm:000000004997f34c type:MM_ANONPAGES val:22 [ 39.825277] BUG: Bad rss-counter state mm:000000007a5a17f6 type:MM_FILEPAGES val:33 [ 39.826440] BUG: Bad rss-counter state mm:000000007a5a17f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62751' (ECDSA) to the list of known hosts. 2023/06/20 01:11:21 fuzzer started 2023/06/20 01:11:22 dialing manager at localhost:44161 2023/06/20 01:11:22 checking machine... 2023/06/20 01:11:22 checking revisions... [ 40.399853] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:11:22 testing simple program... [ 40.457040] cgroup: Unknown subsys name 'net' [ 40.503198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:11:20 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff11001e19ee1 RSP=ffff88800f0cf700 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000246 R13=0000000000000000 R14=ffff8880189e4af8 R15=ffff8880189e4ab0 RIP=ffffffff812e004a 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 00007f3c3d0fe900 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=00007f3c3d6b3650 CR3=000000000ea4e000 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=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff88800e2bd1c0 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff8880143eff58 RSP=ffff8880143efed0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=00007f94018dbd00 R14=0000000000000001 R15=ffff888014330940 RIP=ffffffff814c0384 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 00007f9402447900 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=00007f94018dbd00 CR3=000000000c9a4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a81c0b977f5125ce00000000000ae988 XMM05=f02504732eb0089b0000000000137390 XMM06=806171799158d9670000000000135e10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000