syzkaller login: [ 40.912684] BUG: Bad rss-counter state mm:0000000001ef0426 type:MM_FILEPAGES val:33 [ 40.913903] BUG: Bad rss-counter state mm:0000000001ef0426 type:MM_ANONPAGES val:22 [ 40.946590] ================================================================== [ 40.947598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.948618] Read of size 8 at addr ffff88800e8bdc20 by task sshd/220 [ 40.949505] [ 40.949713] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.950688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.951695] Call Trace: [ 40.952056] [ 40.952346] dump_stack_lvl+0x91/0xf0 [ 40.952861] print_report+0xcc/0x620 [ 40.953436] ? __virt_addr_valid+0x102/0x340 [ 40.954028] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.954681] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.955339] kasan_report+0xbe/0xf0 [ 40.955835] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.956419] vma_interval_tree_remove+0xc75/0xec0 [ 40.957168] vma_prepare+0xc54/0x11a0 [ 40.957642] __split_vma+0x5af/0x950 [ 40.958105] ? __pfx___split_vma+0x10/0x10 [ 40.958632] ? find_held_lock+0x2c/0x110 [ 40.959156] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.959723] ? lock_is_held_type+0x9f/0x120 [ 40.960263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.960859] ? mtree_range_walk+0x632/0x900 [ 40.961411] ? mas_walk+0x5c7/0x7c0 [ 40.961890] do_vmi_munmap+0x1f1/0x2b0 [ 40.962373] mmap_region+0x1f9/0x2660 [ 40.962842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.963362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.964062] ? __pfx_lock_acquire+0x10/0x10 [ 40.964598] ? __pfx_mmap_region+0x10/0x10 [ 40.965156] ? security_mmap_addr+0x7d/0xa0 [ 40.965693] ? get_unmapped_area+0x1f5/0x3f0 [ 40.966239] do_mmap+0x854/0xf00 [ 40.966679] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.967176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.967730] ksys_mmap_pgoff+0x3af/0x500 [ 40.968236] do_syscall_64+0x3f/0x90 [ 40.968709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.969375] RIP: 0033:0x7fb27fe00d82 [ 40.969832] 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 [ 40.971957] RSP: 002b:00007fff329ad838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.972868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb27fe00d82 [ 40.973744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb27f23a000 [ 40.974591] RBP: 00007fb27f23a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.975635] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85ddd1b20 [ 40.976481] R13: 00007fff329ad850 R14: 00007fff329ad880 R15: 00007fff329adbe0 [ 40.977351] [ 40.977655] [ 40.977870] Allocated by task 213: [ 40.978304] kasan_save_stack+0x22/0x50 [ 40.978803] kasan_set_track+0x25/0x30 [ 40.979282] __kasan_slab_alloc+0x59/0x70 [ 40.979791] kmem_cache_alloc+0x16b/0x370 [ 40.980304] vm_area_dup+0x20/0x160 [ 40.980756] __split_vma+0x170/0x950 [ 40.981236] split_vma+0xc6/0x110 [ 40.981673] mprotect_fixup+0x8d2/0xb30 [ 40.982172] do_mprotect_pkey+0x87e/0xd40 [ 40.982690] __x64_sys_mprotect+0x78/0xc0 [ 40.983194] do_syscall_64+0x3f/0x90 [ 40.983655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.984291] [ 40.984507] Freed by task 213: [ 40.984894] kasan_save_stack+0x22/0x50 [ 40.985406] kasan_set_track+0x25/0x30 [ 40.985886] kasan_save_free_info+0x2b/0x50 [ 40.986405] __kasan_slab_free+0x10a/0x190 [ 40.986932] kmem_cache_free+0x10d/0x4d0 [ 40.987423] rcu_core+0x8c8/0x2860 [ 40.987858] __do_softirq+0x1b7/0x7d4 [ 40.988330] [ 40.988549] Last potentially related work creation: [ 40.989148] kasan_save_stack+0x22/0x50 [ 40.989654] __kasan_record_aux_stack+0x8e/0xa0 [ 40.990212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.990844] remove_vma+0x139/0x170 [ 40.991293] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.991854] do_vmi_munmap+0x1f1/0x2b0 [ 40.992339] __vm_munmap+0x138/0x3a0 [ 40.992792] __x64_sys_munmap+0x59/0x80 [ 40.993290] do_syscall_64+0x3f/0x90 [ 40.993766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.994388] [ 40.994598] Second to last potentially related work creation: [ 40.995276] kasan_save_stack+0x22/0x50 [ 40.995784] __kasan_record_aux_stack+0x8e/0xa0 [ 40.996355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.997012] remove_vma+0x139/0x170 [ 40.997462] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.998018] do_vmi_munmap+0x1f1/0x2b0 [ 40.998500] mmap_region+0x1f9/0x2660 [ 40.998974] do_mmap+0x854/0xf00 [ 40.999402] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.999890] ksys_mmap_pgoff+0x3af/0x500 [ 41.000392] do_syscall_64+0x3f/0x90 [ 41.000850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.001497] [ 41.001712] The buggy address belongs to the object at ffff88800e8bdbc8 [ 41.001712] which belongs to the cache vm_area_struct of size 168 [ 41.003173] The buggy address is located 88 bytes inside of [ 41.003173] freed 168-byte region [ffff88800e8bdbc8, ffff88800e8bdc70) [ 41.004573] [ 41.004790] The buggy address belongs to the physical page: [ 41.005463] page:00000000d7f9f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8bd [ 41.006548] memcg:ffff88800dc9e701 [ 41.006969] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.007655] page_type: 0xffffffff() [ 41.008103] raw: 0100000000000200 ffff88800879fc80 ffffea0000337900 dead000000000007 [ 41.009018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc9e701 [ 41.009930] page dumped because: kasan: bad access detected [ 41.010584] [ 41.010797] Memory state around the buggy address: [ 41.011385] ffff88800e8bdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.012230] ffff88800e8bdb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.013093] >ffff88800e8bdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.013938] ^ [ 41.014469] ffff88800e8bdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.015326] ffff88800e8bdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.016173] ================================================================== [ 41.017278] Disabling lock debugging due to kernel taint [ 43.419865] BUG: Bad rss-counter state mm:0000000064d1e231 type:MM_FILEPAGES val:33 [ 43.420721] BUG: Bad rss-counter state mm:0000000064d1e231 type:MM_ANONPAGES val:22 [ 43.910902] BUG: Bad rss-counter state mm:00000000dd94ad50 type:MM_FILEPAGES val:33 [ 43.911896] BUG: Bad rss-counter state mm:00000000dd94ad50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51244' (ECDSA) to the list of known hosts. 2023/06/20 05:33:20 fuzzer started 2023/06/20 05:33:20 dialing manager at localhost:44161 2023/06/20 05:33:20 checking machine... 2023/06/20 05:33:20 checking revisions... [ 44.614747] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:33:20 testing simple program... [ 44.665131] cgroup: Unknown subsys name 'net' [ 44.704762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000011a0000 RCX=0000000000000000 RDX=ffffed1001e12111 RSI=0000000000000008 RDI=ffff88800f090880 RBP=ffff88800f090000 RSP=ffff888008d7fd18 R8 =ffff88800f090618 R9 =ffffed1001e12110 R10=ffff88800f090887 R11=0000000000000000 R12=ffff88800f090000 R13=0000000000000000 R14=0000000000000000 R15=ffff888010055101 RIP=ffffffff81143fa4 RFL=00000047 [---Z-PC] 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 0000000000000000 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=00007f30afc92650 CR3=000000001673a000 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=00000000000081a0 RCX=0000000000000000 RDX=1ffff11002c5c54a RSI=ffffffff81c50f7d RDI=ffff888019bec738 RBP=ffff88801003c380 RSP=ffff888014707758 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff8880162e2a50 R13=ffff888019bec738 R14=ffff8880162e2a50 R15=ffff8880147078c0 RIP=ffffffff81c50fa3 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 00007f8371ea7900 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=00007f83712b3920 CR3=000000000978a000 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=30aaa6b85b7c13c700000000000ae988 XMM05=d13e5866ac3870a700000000001363c0 XMM06=4fda316b135da52b0000000000134e40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000