[ 38.682606] BUG: Bad rss-counter state mm:00000000c29032a3 type:MM_FILEPAGES val:33 [ 38.683782] BUG: Bad rss-counter state mm:00000000c29032a3 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.852314] ================================================================== [ 38.853257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.854310] Read of size 8 at addr ffff888016d4a880 by task sshd/221 [ 38.855111] [ 38.855340] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.856263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.857264] Call Trace: [ 38.857599] [ 38.857907] dump_stack_lvl+0x91/0xf0 [ 38.858417] print_report+0xcc/0x620 [ 38.858945] ? __virt_addr_valid+0x102/0x340 [ 38.859577] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860260] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860935] kasan_report+0xbe/0xf0 [ 38.861456] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862134] vma_interval_tree_remove+0xc75/0xec0 [ 38.862803] vma_prepare+0xc54/0x11a0 [ 38.863344] __split_vma+0x5af/0x950 [ 38.863880] ? __pfx___split_vma+0x10/0x10 [ 38.864456] ? find_held_lock+0x2c/0x110 [ 38.865032] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.865638] ? lock_is_held_type+0x9f/0x120 [ 38.866231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.866895] ? mtree_range_walk+0x632/0x900 [ 38.867507] ? mas_walk+0x5c7/0x7c0 [ 38.868055] do_vmi_munmap+0x1f1/0x2b0 [ 38.868593] mmap_region+0x1f9/0x2660 [ 38.869148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.869699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.870505] ? __pfx_lock_acquire+0x10/0x10 [ 38.871120] ? __pfx_mmap_region+0x10/0x10 [ 38.871694] ? security_mmap_addr+0x7d/0xa0 [ 38.872267] ? get_unmapped_area+0x1f5/0x3f0 [ 38.872867] do_mmap+0x854/0xf00 [ 38.873349] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.873888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.874499] ksys_mmap_pgoff+0x3af/0x500 [ 38.875051] do_syscall_64+0x3f/0x90 [ 38.875582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876280] RIP: 0033:0x7f6046cc6d82 [ 38.876781] 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 [ 38.879081] RSP: 002b:00007fff19b8bcf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.880064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6046cc6d82 [ 38.880980] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6046100000 [ 38.881898] RBP: 00007f6046100000 R08: 0000000000000009 R09: 0000000000001000 [ 38.882809] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed160b9ec0 [ 38.883723] R13: 00007fff19b8bd10 R14: 00007fff19b8bd40 R15: 00007fff19b8c0a0 [ 38.884653] [ 38.884966] [ 38.885200] Allocated by task 214: [ 38.885661] kasan_save_stack+0x22/0x50 [ 38.886211] kasan_set_track+0x25/0x30 [ 38.886740] __kasan_slab_alloc+0x59/0x70 [ 38.887321] kmem_cache_alloc+0x16b/0x370 [ 38.887881] vm_area_dup+0x20/0x160 [ 38.888373] __split_vma+0x170/0x950 [ 38.888877] split_vma+0xc6/0x110 [ 38.889355] mprotect_fixup+0x8d2/0xb30 [ 38.889901] do_mprotect_pkey+0x87e/0xd40 [ 38.890466] __x64_sys_mprotect+0x78/0xc0 [ 38.891032] do_syscall_64+0x3f/0x90 [ 38.891562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892252] [ 38.892488] Freed by task 214: [ 38.892902] kasan_save_stack+0x22/0x50 [ 38.893450] kasan_set_track+0x25/0x30 [ 38.893989] kasan_save_free_info+0x2b/0x50 [ 38.894568] __kasan_slab_free+0x10a/0x190 [ 38.895157] kmem_cache_free+0x10d/0x4d0 [ 38.895709] rcu_core+0x8c8/0x2860 [ 38.896189] __do_softirq+0x1b7/0x7d4 [ 38.896707] [ 38.896939] Last potentially related work creation: [ 38.897566] kasan_save_stack+0x22/0x50 [ 38.898137] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899457] remove_vma+0x139/0x170 [ 38.899947] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900547] do_vmi_munmap+0x1f1/0x2b0 [ 38.901075] __vm_munmap+0x138/0x3a0 [ 38.901586] __x64_sys_munmap+0x59/0x80 [ 38.902119] do_syscall_64+0x3f/0x90 [ 38.902632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903338] [ 38.903574] The buggy address belongs to the object at ffff888016d4a828 [ 38.903574] which belongs to the cache vm_area_struct of size 168 [ 38.905166] The buggy address is located 88 bytes inside of [ 38.905166] freed 168-byte region [ffff888016d4a828, ffff888016d4a8d0) [ 38.906679] [ 38.906910] The buggy address belongs to the physical page: [ 38.907630] page:00000000f2c5bf29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d4a [ 38.908792] memcg:ffff88800eb29801 [ 38.909256] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.909998] page_type: 0xffffffff() [ 38.910475] raw: 0100000000000200 ffff8880087a0c80 ffffea000040a000 dead000000000003 [ 38.911478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb29801 [ 38.912456] page dumped because: kasan: bad access detected [ 38.913159] [ 38.913388] Memory state around the buggy address: [ 38.914059] ffff888016d4a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.914978] ffff888016d4a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.915892] >ffff888016d4a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.916801] ^ [ 38.917243] ffff888016d4a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.918160] ffff888016d4a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.919076] ================================================================== [ 38.920446] Disabling lock debugging due to kernel taint [ 40.241682] BUG: Bad rss-counter state mm:00000000a47c3609 type:MM_FILEPAGES val:33 [ 40.243039] BUG: Bad rss-counter state mm:00000000a47c3609 type:MM_ANONPAGES val:22 [ 40.706277] BUG: Bad rss-counter state mm:000000003ba33bcc type:MM_FILEPAGES val:33 [ 40.707073] BUG: Bad rss-counter state mm:000000003ba33bcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42580' (ECDSA) to the list of known hosts. 2023/06/21 03:26:29 fuzzer started 2023/06/21 03:26:29 dialing manager at localhost:36067 2023/06/21 03:26:29 checking machine... 2023/06/21 03:26:29 checking revisions... [ 41.455864] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:26:29 testing simple program... [ 41.498441] cgroup: Unknown subsys name 'net' [ 41.536420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88801586fe58 RDI=ffffffff8185af33 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000223eb R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015878000 R15=ffff88800ced8b30 RIP=ffffffff811303b2 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 00007fc047f30900 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=00007fc047324340 CR3=000000000c996000 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=a2780f5baee1b8e000000000000ae988 XMM05=9ef9d32b2e841eb50000000000133578 XMM06=e4cb8bb95a7664b600000000001320a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09b30 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09a68 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fd639f81900 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=00007ffe8b157000 CR3=000000000c9d0000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000