syzkaller login: [ 32.335792] BUG: Bad rss-counter state mm:00000000331526df type:MM_FILEPAGES val:33 [ 32.337079] BUG: Bad rss-counter state mm:00000000331526df type:MM_ANONPAGES val:22 [ 32.376693] ================================================================== [ 32.377618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.378724] Read of size 8 at addr ffff88801a13fed8 by task sshd/219 [ 32.379531] [ 32.379753] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.380703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.381743] Call Trace: [ 32.382084] [ 32.382387] dump_stack_lvl+0x91/0xf0 [ 32.382912] print_report+0xcc/0x620 [ 32.383416] ? __virt_addr_valid+0x102/0x340 [ 32.383988] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.384633] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.385294] kasan_report+0xbe/0xf0 [ 32.385794] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.386452] vma_interval_tree_remove+0xc75/0xec0 [ 32.387086] vma_prepare+0xc54/0x11a0 [ 32.387594] __split_vma+0x5af/0x950 [ 32.388132] ? __pfx___split_vma+0x10/0x10 [ 32.388696] ? find_held_lock+0x2c/0x110 [ 32.389242] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.389852] ? lock_is_held_type+0x9f/0x120 [ 32.390407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.391035] ? mtree_range_walk+0x632/0x900 [ 32.391599] ? mas_walk+0x5c7/0x7c0 [ 32.392108] do_vmi_munmap+0x1f1/0x2b0 [ 32.392626] mmap_region+0x1f9/0x2660 [ 32.393139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.393685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.394451] ? __pfx_lock_acquire+0x10/0x10 [ 32.395023] ? __pfx_mmap_region+0x10/0x10 [ 32.395585] ? security_mmap_addr+0x7d/0xa0 [ 32.396187] ? get_unmapped_area+0x1f5/0x3f0 [ 32.396774] do_mmap+0x854/0xf00 [ 32.397236] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.397753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.398339] ksys_mmap_pgoff+0x3af/0x500 [ 32.398872] do_syscall_64+0x3f/0x90 [ 32.399391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.400091] RIP: 0033:0x7f68158d2d82 [ 32.400576] 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 [ 32.402905] RSP: 002b:00007fffc4b9cab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.403915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68158d2d82 [ 32.404845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6814d0c000 [ 32.405771] RBP: 00007f6814d0c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.406680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3f9ac8ec0 [ 32.407588] R13: 00007fffc4b9cad0 R14: 00007fffc4b9cb00 R15: 00007fffc4b9ce60 [ 32.408528] [ 32.408838] [ 32.409066] Allocated by task 212: [ 32.409522] kasan_save_stack+0x22/0x50 [ 32.410067] kasan_set_track+0x25/0x30 [ 32.410592] __kasan_slab_alloc+0x59/0x70 [ 32.411150] kmem_cache_alloc+0x16b/0x370 [ 32.411702] vm_area_dup+0x20/0x160 [ 32.412212] __split_vma+0x170/0x950 [ 32.412709] split_vma+0xc6/0x110 [ 32.413167] mprotect_fixup+0x8d2/0xb30 [ 32.413691] do_mprotect_pkey+0x87e/0xd40 [ 32.414242] __x64_sys_mprotect+0x78/0xc0 [ 32.414776] do_syscall_64+0x3f/0x90 [ 32.415278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.416032] [ 32.416307] Freed by task 212: [ 32.416788] kasan_save_stack+0x22/0x50 [ 32.417399] kasan_set_track+0x25/0x30 [ 32.417985] kasan_save_free_info+0x2b/0x50 [ 32.418640] __kasan_slab_free+0x10a/0x190 [ 32.419281] kmem_cache_free+0x10d/0x4d0 [ 32.419892] rcu_core+0x8c8/0x2860 [ 32.420460] __do_softirq+0x1b7/0x7d4 [ 32.421080] [ 32.421359] Last potentially related work creation: [ 32.422105] kasan_save_stack+0x22/0x50 [ 32.422773] __kasan_record_aux_stack+0x8e/0xa0 [ 32.423521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.424354] remove_vma+0x139/0x170 [ 32.424949] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.425667] do_vmi_munmap+0x1f1/0x2b0 [ 32.426285] __vm_munmap+0x138/0x3a0 [ 32.426889] __x64_sys_munmap+0x59/0x80 [ 32.427528] do_syscall_64+0x3f/0x90 [ 32.428151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.428965] [ 32.429230] The buggy address belongs to the object at ffff88801a13fe80 [ 32.429230] which belongs to the cache vm_area_struct of size 168 [ 32.431121] The buggy address is located 88 bytes inside of [ 32.431121] freed 168-byte region [ffff88801a13fe80, ffff88801a13ff28) [ 32.432804] [ 32.433060] The buggy address belongs to the physical page: [ 32.433834] page:000000005f860027 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a13f [ 32.435113] memcg:ffff88800c656a01 [ 32.435615] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.436376] page_type: 0xffffffff() [ 32.436904] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.438023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c656a01 [ 32.439221] page dumped because: kasan: bad access detected [ 32.440036] [ 32.440320] Memory state around the buggy address: [ 32.441036] ffff88801a13fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.442074] ffff88801a13fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.443128] >ffff88801a13fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.444217] ^ [ 32.445101] ffff88801a13ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.446230] ffff88801a13ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.447367] ================================================================== [ 32.448719] Disabling lock debugging due to kernel taint [ 34.364818] BUG: Bad rss-counter state mm:000000008004271f type:MM_FILEPAGES val:33 [ 34.365876] BUG: Bad rss-counter state mm:000000008004271f type:MM_ANONPAGES val:22 [ 34.849375] BUG: Bad rss-counter state mm:000000004504494e type:MM_FILEPAGES val:33 [ 34.851209] BUG: Bad rss-counter state mm:000000004504494e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26576' (ECDSA) to the list of known hosts. 2023/06/19 12:33:15 fuzzer started 2023/06/19 12:33:15 dialing manager at localhost:44161 2023/06/19 12:33:15 checking machine... 2023/06/19 12:33:15 checking revisions... [ 35.544048] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:33:16 testing simple program... [ 35.584099] cgroup: Unknown subsys name 'net' [ 35.613911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0591530950 CR3=000000000d69a000 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=f8a7306116b039a4984bd8e285f00380 XMM02=000000000011f160ec2efd57dc4c00df XMM03=0000000000123b88f4451fee64940ded XMM04=1d7ebc43bde548ef00000000000ae988 XMM05=5a2d320825a1660d0000000000133c20 XMM06=806171799158d9670000000000133618 XMM07=e042d86d42eb936e0000000000123e08 XMM08=f4451fee64940ded000000000011f1c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800e979b40 RSI=ffffffff811431df RDI=0000000000000006 RBP=000000000c5ae500 RSP=ffff88800fd0fda0 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000800 R14=0000000000000001 R15=ffff88800c5ae500 RIP=ffffffff814c07eb RFL=00000256 [---ZAP-] 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 00007f8599c30900 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=00007ffcd9f0e000 CR3=000000000eb9a000 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=563412feff00545000000000000080fe 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