syzkaller login: [ 33.400930] BUG: Bad rss-counter state mm:00000000d74c179c type:MM_FILEPAGES val:33 [ 33.402149] BUG: Bad rss-counter state mm:00000000d74c179c type:MM_ANONPAGES val:22 [ 33.443779] ================================================================== [ 33.445110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.446358] Read of size 8 at addr ffff8880161223f8 by task sshd/221 [ 33.447378] [ 33.447620] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.448557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.449619] Call Trace: [ 33.449985] [ 33.450293] dump_stack_lvl+0x91/0xf0 [ 33.450817] print_report+0xcc/0x620 [ 33.451334] ? __virt_addr_valid+0x102/0x340 [ 33.451924] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.452584] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.453247] kasan_report+0xbe/0xf0 [ 33.453759] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.454436] vma_interval_tree_remove+0xc75/0xec0 [ 33.455083] vma_prepare+0xc54/0x11a0 [ 33.455595] __split_vma+0x5af/0x950 [ 33.456103] ? __pfx___split_vma+0x10/0x10 [ 33.456672] ? find_held_lock+0x2c/0x110 [ 33.457229] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.457834] ? lock_is_held_type+0x9f/0x120 [ 33.458456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.459142] ? mtree_range_walk+0x632/0x900 [ 33.459732] ? mas_walk+0x5c7/0x7c0 [ 33.460237] do_vmi_munmap+0x1f1/0x2b0 [ 33.460764] mmap_region+0x1f9/0x2660 [ 33.461277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.461834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.462624] ? __pfx_lock_acquire+0x10/0x10 [ 33.463210] ? __pfx_mmap_region+0x10/0x10 [ 33.463788] ? security_mmap_addr+0x7d/0xa0 [ 33.464366] ? get_unmapped_area+0x1f5/0x3f0 [ 33.464959] do_mmap+0x854/0xf00 [ 33.465435] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.465992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.466607] ksys_mmap_pgoff+0x3af/0x500 [ 33.467151] do_syscall_64+0x3f/0x90 [ 33.467681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.468396] RIP: 0033:0x7f44d9bd3d82 [ 33.468907] 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 [ 33.471287] RSP: 002b:00007ffdb8a35798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.472300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44d9bd3d82 [ 33.473234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44d900d000 [ 33.474184] RBP: 00007f44d900d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.475111] R10: 0000000000000812 R11: 0000000000000206 R12: 000055908a77bf60 [ 33.476043] R13: 00007ffdb8a357b0 R14: 00007ffdb8a357e0 R15: 00007ffdb8a35b40 [ 33.476981] [ 33.477301] [ 33.477536] Allocated by task 214: [ 33.478015] kasan_save_stack+0x22/0x50 [ 33.478571] kasan_set_track+0x25/0x30 [ 33.479109] __kasan_slab_alloc+0x59/0x70 [ 33.479689] kmem_cache_alloc+0x16b/0x370 [ 33.480257] vm_area_dup+0x20/0x160 [ 33.480754] __split_vma+0x170/0x950 [ 33.481265] split_vma+0xc6/0x110 [ 33.481751] mprotect_fixup+0x8d2/0xb30 [ 33.482318] do_mprotect_pkey+0x87e/0xd40 [ 33.482900] __x64_sys_mprotect+0x78/0xc0 [ 33.483473] do_syscall_64+0x3f/0x90 [ 33.483990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.484698] [ 33.484934] Freed by task 214: [ 33.485361] kasan_save_stack+0x22/0x50 [ 33.485916] kasan_set_track+0x25/0x30 [ 33.486457] kasan_save_free_info+0x2b/0x50 [ 33.487039] __kasan_slab_free+0x10a/0x190 [ 33.487621] kmem_cache_free+0x10d/0x4d0 [ 33.488177] rcu_core+0x8c8/0x2860 [ 33.488665] __do_softirq+0x1b7/0x7d4 [ 33.489243] [ 33.489480] Last potentially related work creation: [ 33.490141] kasan_save_stack+0x22/0x50 [ 33.490683] __kasan_record_aux_stack+0x8e/0xa0 [ 33.491310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.492013] remove_vma+0x139/0x170 [ 33.492502] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.493117] do_vmi_munmap+0x1f1/0x2b0 [ 33.493648] __vm_munmap+0x138/0x3a0 [ 33.494164] __x64_sys_munmap+0x59/0x80 [ 33.494707] do_syscall_64+0x3f/0x90 [ 33.495221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.495927] [ 33.496160] The buggy address belongs to the object at ffff8880161223a0 [ 33.496160] which belongs to the cache vm_area_struct of size 168 [ 33.497756] The buggy address is located 88 bytes inside of [ 33.497756] freed 168-byte region [ffff8880161223a0, ffff888016122448) [ 33.499297] [ 33.499530] The buggy address belongs to the physical page: [ 33.500244] page:0000000092a546c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16122 [ 33.501427] memcg:ffff888016ea3501 [ 33.501885] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.502662] page_type: 0xffffffff() [ 33.503150] raw: 0100000000000200 ffff88800879fc80 ffffea0000392800 dead000000000003 [ 33.504136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ea3501 [ 33.505123] page dumped because: kasan: bad access detected [ 33.505836] [ 33.506077] Memory state around the buggy address: [ 33.506703] ffff888016122280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.507639] ffff888016122300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.508563] >ffff888016122380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.509476] ^ [ 33.510401] ffff888016122400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.511325] ffff888016122480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.512245] ================================================================== [ 33.513423] Disabling lock debugging due to kernel taint [ 36.004510] BUG: Bad rss-counter state mm:0000000024eefb8f type:MM_FILEPAGES val:33 [ 36.005914] BUG: Bad rss-counter state mm:0000000024eefb8f type:MM_ANONPAGES val:22 [ 36.501569] BUG: Bad rss-counter state mm:00000000fe244c04 type:MM_FILEPAGES val:33 [ 36.502657] BUG: Bad rss-counter state mm:00000000fe244c04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15656' (ECDSA) to the list of known hosts. 2023/06/19 19:50:53 fuzzer started 2023/06/19 19:50:54 dialing manager at localhost:44161 2023/06/19 19:50:54 checking machine... 2023/06/19 19:50:54 checking revisions... [ 37.209275] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:50:54 testing simple program... [ 37.260299] cgroup: Unknown subsys name 'net' [ 37.314017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:50:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888010361b40 RSI=ffffffff811fc4e2 RDI=ffff888010362450 RBP=ffff888010362450 RSP=ffff88801470fe50 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880103623b8 R13=ffff888010361b40 R14=0000000000000001 R15=ffff88800f552500 RIP=ffffffff8452fca4 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 00007feeeafc4900 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=00007feeea3f1d40 CR3=000000000dc3a000 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=46e4cedad66753b700000000000ae988 XMM05=e253928a92d7fd550000000000134c28 XMM06=c291bd5c70af25b90000000000133a18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f00921e50b0 CR3=0000000016c40000 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=30353a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000