syzkaller login: [ 30.845211] BUG: Bad rss-counter state mm:000000003e2e0643 type:MM_FILEPAGES val:33 [ 30.846175] BUG: Bad rss-counter state mm:000000003e2e0643 type:MM_ANONPAGES val:22 [ 30.959055] ================================================================== [ 30.959680] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.960318] Read of size 8 at addr ffff888015ddadf0 by task sshd/221 [ 30.960833] [ 30.960981] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.961554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.962222] Call Trace: [ 30.962442] [ 30.962699] dump_stack_lvl+0x91/0xf0 [ 30.963030] print_report+0xcc/0x620 [ 30.963347] ? __virt_addr_valid+0x102/0x340 [ 30.963926] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964789] kasan_report+0xbe/0xf0 [ 30.965131] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965593] vma_interval_tree_remove+0xc75/0xec0 [ 30.966024] vma_prepare+0xc54/0x11a0 [ 30.966355] __split_vma+0x5af/0x950 [ 30.966718] ? __pfx___split_vma+0x10/0x10 [ 30.967099] ? find_held_lock+0x2c/0x110 [ 30.967457] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.967853] ? lock_is_held_type+0x9f/0x120 [ 30.968222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.968639] ? mtree_range_walk+0x632/0x900 [ 30.969016] ? mas_walk+0x5c7/0x7c0 [ 30.969351] do_vmi_munmap+0x1f1/0x2b0 [ 30.969719] mmap_region+0x1f9/0x2660 [ 30.970063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.970455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.971004] ? __pfx_lock_acquire+0x10/0x10 [ 30.971428] ? __pfx_mmap_region+0x10/0x10 [ 30.971808] ? security_mmap_addr+0x7d/0xa0 [ 30.972185] ? get_unmapped_area+0x1f5/0x3f0 [ 30.972566] do_mmap+0x854/0xf00 [ 30.972872] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.973275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.973670] ksys_mmap_pgoff+0x3af/0x500 [ 30.974027] do_syscall_64+0x3f/0x90 [ 30.974388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975445] RIP: 0033:0x7f74c9836d82 [ 30.975746] 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 [ 30.977119] RSP: 002b:00007fff5eb39528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.977698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74c9836d82 [ 30.978264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74c8c70000 [ 30.978883] RBP: 00007f74c8c70000 R08: 0000000000000009 R09: 0000000000001000 [ 30.979457] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583b07b0ec0 [ 30.980031] R13: 00007fff5eb39540 R14: 00007fff5eb39570 R15: 00007fff5eb398d0 [ 30.980602] [ 30.980798] [ 30.980943] Allocated by task 214: [ 30.981230] kasan_save_stack+0x22/0x50 [ 30.981568] kasan_set_track+0x25/0x30 [ 30.981898] __kasan_slab_alloc+0x59/0x70 [ 30.982237] kmem_cache_alloc+0x16b/0x370 [ 30.982577] vm_area_dup+0x20/0x160 [ 30.982904] __split_vma+0x170/0x950 [ 30.983205] split_vma+0xc6/0x110 [ 30.983484] mprotect_fixup+0x8d2/0xb30 [ 30.983810] do_mprotect_pkey+0x87e/0xd40 [ 30.984143] __x64_sys_mprotect+0x78/0xc0 [ 30.984470] do_syscall_64+0x3f/0x90 [ 30.984774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985194] [ 30.985338] Freed by task 204: [ 30.985605] kasan_save_stack+0x22/0x50 [ 30.985939] kasan_set_track+0x25/0x30 [ 30.986268] kasan_save_free_info+0x2b/0x50 [ 30.986673] __kasan_slab_free+0x10a/0x190 [ 30.987023] kmem_cache_free+0x10d/0x4d0 [ 30.987357] rcu_core+0x8c8/0x2860 [ 30.987648] __do_softirq+0x1b7/0x7d4 [ 30.987959] [ 30.988095] Last potentially related work creation: [ 30.988469] kasan_save_stack+0x22/0x50 [ 30.988789] __kasan_record_aux_stack+0x8e/0xa0 [ 30.989171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.989586] remove_vma+0x139/0x170 [ 30.989880] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.990258] do_vmi_munmap+0x1f1/0x2b0 [ 30.990610] __vm_munmap+0x138/0x3a0 [ 30.990952] __x64_sys_munmap+0x59/0x80 [ 30.991310] do_syscall_64+0x3f/0x90 [ 30.991642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.992065] [ 30.992203] Second to last potentially related work creation: [ 30.992638] kasan_save_stack+0x22/0x50 [ 30.992970] __kasan_record_aux_stack+0x8e/0xa0 [ 30.993344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.993760] remove_vma+0x139/0x170 [ 30.994046] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.994402] do_vmi_munmap+0x1f1/0x2b0 [ 30.994771] mmap_region+0x1f9/0x2660 [ 30.995100] do_mmap+0x854/0xf00 [ 30.995387] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.995737] ksys_mmap_pgoff+0x3af/0x500 [ 30.996092] do_syscall_64+0x3f/0x90 [ 30.996400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996825] [ 30.996964] The buggy address belongs to the object at ffff888015ddad98 [ 30.996964] which belongs to the cache vm_area_struct of size 168 [ 30.997960] The buggy address is located 88 bytes inside of [ 30.997960] freed 168-byte region [ffff888015ddad98, ffff888015ddae40) [ 30.998913] [ 30.999051] The buggy address belongs to the physical page: [ 30.999468] page:00000000454b6b7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dda [ 31.000189] memcg:ffff888015ddb601 [ 31.000469] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.000889] page_type: 0xffffffff() [ 31.001175] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.001774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ddb601 [ 31.002354] page dumped because: kasan: bad access detected [ 31.002870] [ 31.003005] Memory state around the buggy address: [ 31.003380] ffff888015ddac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.003946] ffff888015ddad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.004519] >ffff888015ddad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.005118] ^ [ 31.005659] ffff888015ddae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.006277] ffff888015ddae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.006876] ================================================================== [ 31.007665] Disabling lock debugging due to kernel taint [ 32.944151] BUG: Bad rss-counter state mm:00000000216bb2ac type:MM_FILEPAGES val:33 [ 32.944898] BUG: Bad rss-counter state mm:00000000216bb2ac type:MM_ANONPAGES val:22 [ 33.316334] BUG: Bad rss-counter state mm:000000006065a466 type:MM_FILEPAGES val:33 [ 33.316976] BUG: Bad rss-counter state mm:000000006065a466 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30393' (ECDSA) to the list of known hosts. 2023/06/21 09:05:28 fuzzer started 2023/06/21 09:05:28 dialing manager at localhost:36067 2023/06/21 09:05:28 checking machine... 2023/06/21 09:05:28 checking revisions... [ 33.811430] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:05:28 testing simple program... [ 33.856244] cgroup: Unknown subsys name 'net' [ 33.888633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:05:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f24c85a020c RSP=ffff88800b917388 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f24c85a0000 R11=00000000000b6a61 R12=ffff88800b9174a0 R13=0000000000000000 R14=ffff888016dc51c0 R15=0000000000092cc0 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f24c80ad900 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=00007f24c8662650 CR3=000000001cdb4000 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=ffff8880164a7a3c RCX=0000000000000000 RDX=ffff88800ffd3680 RSI=ffffffff8184ccce RDI=ffff88800ffd36a0 RBP=ffff8880164a7a34 RSP=ffff8880164a78e0 R8 =0000000000000007 R9 =0000000000000010 R10=ffff8880164a7a34 R11=0000000000000000 R12=ffff8880164a0000 R13=ffff8880164a8000 R14=ffff8880164a7a3b R15=ffff8880164a7a34 RIP=ffffffff814c089b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3698005700 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=00007f355e9103e0 CR3=000000001a086000 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=35303a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000