syzkaller login: [ 30.100498] BUG: Bad rss-counter state mm:00000000fbc74a31 type:MM_FILEPAGES val:33 [ 30.101607] BUG: Bad rss-counter state mm:00000000fbc74a31 type:MM_ANONPAGES val:22 [ 30.266536] ================================================================== [ 30.267445] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.268377] Read of size 8 at addr ffff88801a512df0 by task sshd/221 [ 30.269240] [ 30.269459] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.270323] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.271328] Call Trace: [ 30.271654] [ 30.271947] dump_stack_lvl+0x91/0xf0 [ 30.272451] print_report+0xcc/0x620 [ 30.272949] ? __virt_addr_valid+0x102/0x340 [ 30.273513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274139] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274769] kasan_report+0xbe/0xf0 [ 30.275250] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275892] vma_interval_tree_remove+0xc75/0xec0 [ 30.276509] vma_prepare+0xc54/0x11a0 [ 30.276990] __split_vma+0x5af/0x950 [ 30.277485] ? __pfx___split_vma+0x10/0x10 [ 30.278010] ? find_held_lock+0x2c/0x110 [ 30.278539] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.279106] ? lock_is_held_type+0x9f/0x120 [ 30.279649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.280263] ? mtree_range_walk+0x632/0x900 [ 30.280820] ? mas_walk+0x5c7/0x7c0 [ 30.281316] do_vmi_munmap+0x1f1/0x2b0 [ 30.281813] mmap_region+0x1f9/0x2660 [ 30.282299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.282819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.283539] ? __pfx_lock_acquire+0x10/0x10 [ 30.284075] ? __pfx_mmap_region+0x10/0x10 [ 30.284618] ? security_mmap_addr+0x7d/0xa0 [ 30.285172] ? get_unmapped_area+0x1f5/0x3f0 [ 30.285736] do_mmap+0x854/0xf00 [ 30.286180] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.286680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.287250] ksys_mmap_pgoff+0x3af/0x500 [ 30.287773] do_syscall_64+0x3f/0x90 [ 30.288259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288919] RIP: 0033:0x7fa65e6cfd82 [ 30.289390] 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 [ 30.291536] RSP: 002b:00007fffe9ea58e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.292447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa65e6cfd82 [ 30.293321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa65db09000 [ 30.294166] RBP: 00007fa65db09000 R08: 0000000000000009 R09: 0000000000001000 [ 30.295016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ed7492ec0 [ 30.295875] R13: 00007fffe9ea5900 R14: 00007fffe9ea5930 R15: 00007fffe9ea5c90 [ 30.296745] [ 30.297042] [ 30.297265] Allocated by task 214: [ 30.297696] kasan_save_stack+0x22/0x50 [ 30.298202] kasan_set_track+0x25/0x30 [ 30.298700] __kasan_slab_alloc+0x59/0x70 [ 30.299219] kmem_cache_alloc+0x16b/0x370 [ 30.299740] vm_area_dup+0x20/0x160 [ 30.300202] __split_vma+0x170/0x950 [ 30.300668] split_vma+0xc6/0x110 [ 30.301126] mprotect_fixup+0x8d2/0xb30 [ 30.301630] do_mprotect_pkey+0x87e/0xd40 [ 30.302153] __x64_sys_mprotect+0x78/0xc0 [ 30.302671] do_syscall_64+0x3f/0x90 [ 30.303151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.303797] [ 30.304017] Freed by task 214: [ 30.304408] kasan_save_stack+0x22/0x50 [ 30.304911] kasan_set_track+0x25/0x30 [ 30.305432] kasan_save_free_info+0x2b/0x50 [ 30.305968] __kasan_slab_free+0x10a/0x190 [ 30.306509] kmem_cache_free+0x10d/0x4d0 [ 30.307016] rcu_core+0x8c8/0x2860 [ 30.307457] __do_softirq+0x1b7/0x7d4 [ 30.307943] [ 30.308163] Last potentially related work creation: [ 30.308749] kasan_save_stack+0x22/0x50 [ 30.309265] __kasan_record_aux_stack+0x8e/0xa0 [ 30.309840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.310482] remove_vma+0x139/0x170 [ 30.310932] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.311499] do_vmi_munmap+0x1f1/0x2b0 [ 30.311986] __vm_munmap+0x138/0x3a0 [ 30.312458] __x64_sys_munmap+0x59/0x80 [ 30.312958] do_syscall_64+0x3f/0x90 [ 30.313468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.314113] [ 30.314330] The buggy address belongs to the object at ffff88801a512d98 [ 30.314330] which belongs to the cache vm_area_struct of size 168 [ 30.315806] The buggy address is located 88 bytes inside of [ 30.315806] freed 168-byte region [ffff88801a512d98, ffff88801a512e40) [ 30.317227] [ 30.317445] The buggy address belongs to the physical page: [ 30.318111] page:00000000d1cd0e99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a512 [ 30.319208] memcg:ffff88800dbb6201 [ 30.319642] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.320307] page_type: 0xffffffff() [ 30.320767] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.321715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb6201 [ 30.322621] page dumped because: kasan: bad access detected [ 30.323313] [ 30.323533] Memory state around the buggy address: [ 30.324125] ffff88801a512c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.324986] ffff88801a512d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.325860] >ffff88801a512d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.326712] ^ [ 30.327522] ffff88801a512e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.328366] ffff88801a512e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.329229] ================================================================== [ 30.330349] Disabling lock debugging due to kernel taint [ 32.729651] BUG: Bad rss-counter state mm:000000002f364067 type:MM_FILEPAGES val:33 [ 32.730308] BUG: Bad rss-counter state mm:000000002f364067 type:MM_ANONPAGES val:22 [ 33.216029] BUG: Bad rss-counter state mm:000000002d29987b type:MM_FILEPAGES val:33 [ 33.217191] BUG: Bad rss-counter state mm:000000002d29987b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22478' (ECDSA) to the list of known hosts. 2023/06/21 00:00:26 fuzzer started 2023/06/21 00:00:26 dialing manager at localhost:36067 2023/06/21 00:00:26 checking machine... 2023/06/21 00:00:26 checking revisions... [ 33.863387] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:00:26 testing simple program... [ 33.910036] cgroup: Unknown subsys name 'net' [ 33.950184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:00:26 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11002fe6f86 RCX=ffffffff8148257b RDX=ffff88800fde0000 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888017f37c28 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800fde0000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b RFL=00000213 [----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 00007f6c3edf8900 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=00007ffc1bb49000 CR3=000000000edd8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=0000000000000001 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=00007f140806ed20 CR3=000000000f744000 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=30303a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323137 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000