syzkaller login: [ 38.792945] BUG: Bad rss-counter state mm:00000000f678058c type:MM_FILEPAGES val:33 [ 38.794395] BUG: Bad rss-counter state mm:00000000f678058c type:MM_ANONPAGES val:22 [ 38.834008] ================================================================== [ 38.835045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.836016] Read of size 8 at addr ffff888019e16968 by task sshd/220 [ 38.836907] [ 38.837135] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.837991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.838977] Call Trace: [ 38.839293] [ 38.839580] dump_stack_lvl+0x91/0xf0 [ 38.840076] print_report+0xcc/0x620 [ 38.840558] ? __virt_addr_valid+0x102/0x340 [ 38.841135] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841757] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842375] kasan_report+0xbe/0xf0 [ 38.842856] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843479] vma_interval_tree_remove+0xc75/0xec0 [ 38.844091] vma_prepare+0xc54/0x11a0 [ 38.844568] __split_vma+0x5af/0x950 [ 38.845047] ? __pfx___split_vma+0x10/0x10 [ 38.845593] ? find_held_lock+0x2c/0x110 [ 38.846112] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.846673] ? lock_is_held_type+0x9f/0x120 [ 38.847218] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.847825] ? mtree_range_walk+0x632/0x900 [ 38.848370] ? mas_walk+0x5c7/0x7c0 [ 38.848845] do_vmi_munmap+0x1f1/0x2b0 [ 38.849349] mmap_region+0x1f9/0x2660 [ 38.849835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.850344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.851070] ? __pfx_lock_acquire+0x10/0x10 [ 38.851606] ? __pfx_mmap_region+0x10/0x10 [ 38.852150] ? security_mmap_addr+0x7d/0xa0 [ 38.852685] ? get_unmapped_area+0x1f5/0x3f0 [ 38.853250] do_mmap+0x854/0xf00 [ 38.853690] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.854182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.854744] ksys_mmap_pgoff+0x3af/0x500 [ 38.855251] do_syscall_64+0x3f/0x90 [ 38.855732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.856388] RIP: 0033:0x7f4287430d82 [ 38.856848] 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 [ 38.858999] RSP: 002b:00007ffee957dce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.859901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4287430d82 [ 38.860744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f428686a000 [ 38.861611] RBP: 00007f428686a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.862450] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ca4291b20 [ 38.863295] R13: 00007ffee957dd00 R14: 00007ffee957dd30 R15: 00007ffee957e090 [ 38.864148] [ 38.864437] [ 38.864650] Allocated by task 213: [ 38.865078] kasan_save_stack+0x22/0x50 [ 38.865593] kasan_set_track+0x25/0x30 [ 38.866092] __kasan_slab_alloc+0x59/0x70 [ 38.866619] kmem_cache_alloc+0x16b/0x370 [ 38.867141] vm_area_dup+0x20/0x160 [ 38.867597] __split_vma+0x170/0x950 [ 38.868064] split_vma+0xc6/0x110 [ 38.868503] mprotect_fixup+0x8d2/0xb30 [ 38.869006] do_mprotect_pkey+0x87e/0xd40 [ 38.869538] __x64_sys_mprotect+0x78/0xc0 [ 38.870058] do_syscall_64+0x3f/0x90 [ 38.870533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871188] [ 38.871401] Freed by task 13: [ 38.871792] kasan_save_stack+0x22/0x50 [ 38.872301] kasan_set_track+0x25/0x30 [ 38.872796] kasan_save_free_info+0x2b/0x50 [ 38.873348] __kasan_slab_free+0x10a/0x190 [ 38.873877] kmem_cache_free+0x10d/0x4d0 [ 38.874380] rcu_core+0x8c8/0x2860 [ 38.874875] __do_softirq+0x1b7/0x7d4 [ 38.875371] [ 38.875585] Last potentially related work creation: [ 38.876176] kasan_save_stack+0x22/0x50 [ 38.876679] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.877910] remove_vma+0x139/0x170 [ 38.878358] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.878917] do_vmi_munmap+0x1f1/0x2b0 [ 38.879401] __vm_munmap+0x138/0x3a0 [ 38.879864] __x64_sys_munmap+0x59/0x80 [ 38.880359] do_syscall_64+0x3f/0x90 [ 38.880837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881499] [ 38.881723] The buggy address belongs to the object at ffff888019e16910 [ 38.881723] which belongs to the cache vm_area_struct of size 168 [ 38.883197] The buggy address is located 88 bytes inside of [ 38.883197] freed 168-byte region [ffff888019e16910, ffff888019e169b8) [ 38.884599] [ 38.884816] The buggy address belongs to the physical page: [ 38.885505] page:000000001636260d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e16 [ 38.886598] memcg:ffff88800f643401 [ 38.887028] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.887665] page_type: 0xffffffff() [ 38.888114] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dc100 dead000000000004 [ 38.889039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f643401 [ 38.889957] page dumped because: kasan: bad access detected [ 38.890615] [ 38.890828] Memory state around the buggy address: [ 38.891415] ffff888019e16800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.892280] ffff888019e16880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.893146] >ffff888019e16900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.893991] ^ [ 38.894767] ffff888019e16980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.895612] ffff888019e16a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.896458] ================================================================== [ 38.897488] Disabling lock debugging due to kernel taint [ 40.882897] BUG: Bad rss-counter state mm:0000000098c0f441 type:MM_FILEPAGES val:33 [ 40.884137] BUG: Bad rss-counter state mm:0000000098c0f441 type:MM_ANONPAGES val:22 [ 41.442664] BUG: Bad rss-counter state mm:00000000298b0197 type:MM_FILEPAGES val:33 [ 41.443467] BUG: Bad rss-counter state mm:00000000298b0197 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26742' (ECDSA) to the list of known hosts. 2023/06/20 23:41:06 fuzzer started 2023/06/20 23:41:07 dialing manager at localhost:36067 2023/06/20 23:41:07 checking machine... 2023/06/20 23:41:07 checking revisions... [ 42.098366] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:41:07 testing simple program... [ 42.142649] cgroup: Unknown subsys name 'net' [ 42.180519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffecd5ec88 CR3=0000000005482000 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=00007f87f81ce510000055b37b186790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88801032ff48 RDI=ffffffff846000aa RBP=ffff88806cf09ac8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800fc79b40 R15=ffff888019dc97e8 RIP=ffffffff811fc89c 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 00007f60a34f9900 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=00007f60a3ab10b0 CR3=0000000017466000 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=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