syzkaller login: [ 60.349428] BUG: Bad rss-counter state mm:00000000d20531e9 type:MM_FILEPAGES val:33 [ 60.350501] BUG: Bad rss-counter state mm:00000000d20531e9 type:MM_ANONPAGES val:22 [ 60.516061] ================================================================== [ 60.516985] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.517932] Read of size 8 at addr ffff8880190cd968 by task sshd/219 [ 60.518731] [ 60.519022] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.519932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.520921] Call Trace: [ 60.521244] [ 60.521551] dump_stack_lvl+0x91/0xf0 [ 60.522054] print_report+0xcc/0x620 [ 60.522543] ? __virt_addr_valid+0x102/0x340 [ 60.523089] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.523711] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.524330] kasan_report+0xbe/0xf0 [ 60.524811] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.525430] vma_interval_tree_remove+0xc75/0xec0 [ 60.526050] vma_prepare+0xc54/0x11a0 [ 60.526533] __split_vma+0x5af/0x950 [ 60.527003] ? __pfx___split_vma+0x10/0x10 [ 60.527538] ? find_held_lock+0x2c/0x110 [ 60.528055] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.528620] ? lock_is_held_type+0x9f/0x120 [ 60.529170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.529774] ? mtree_range_walk+0x632/0x900 [ 60.530344] ? mas_walk+0x5c7/0x7c0 [ 60.530822] do_vmi_munmap+0x1f1/0x2b0 [ 60.531320] mmap_region+0x1f9/0x2660 [ 60.531818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.532327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.533037] ? __pfx_lock_acquire+0x10/0x10 [ 60.533566] ? __pfx_mmap_region+0x10/0x10 [ 60.534107] ? security_mmap_addr+0x7d/0xa0 [ 60.534633] ? get_unmapped_area+0x1f5/0x3f0 [ 60.535178] do_mmap+0x854/0xf00 [ 60.535617] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.536112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.536673] ksys_mmap_pgoff+0x3af/0x500 [ 60.537183] do_syscall_64+0x3f/0x90 [ 60.537666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.538332] RIP: 0033:0x7fcb8a9fdd82 [ 60.538785] 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 [ 60.540921] RSP: 002b:00007ffe32603e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.541825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb8a9fdd82 [ 60.542688] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb89e37000 [ 60.543529] RBP: 00007fcb89e37000 R08: 0000000000000009 R09: 0000000000001000 [ 60.544374] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f26d9a8d90 [ 60.545217] R13: 00007ffe32603ea0 R14: 00007ffe32603ed0 R15: 00007ffe32604230 [ 60.546076] [ 60.546370] [ 60.546583] Allocated by task 212: [ 60.547020] kasan_save_stack+0x22/0x50 [ 60.547522] kasan_set_track+0x25/0x30 [ 60.548015] __kasan_slab_alloc+0x59/0x70 [ 60.548539] kmem_cache_alloc+0x16b/0x370 [ 60.549050] vm_area_dup+0x20/0x160 [ 60.549508] __split_vma+0x170/0x950 [ 60.549970] split_vma+0xc6/0x110 [ 60.550442] mprotect_fixup+0x8d2/0xb30 [ 60.550940] do_mprotect_pkey+0x87e/0xd40 [ 60.551463] __x64_sys_mprotect+0x78/0xc0 [ 60.551980] do_syscall_64+0x3f/0x90 [ 60.552459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.553108] [ 60.553322] Freed by task 212: [ 60.553720] kasan_save_stack+0x22/0x50 [ 60.554233] kasan_set_track+0x25/0x30 [ 60.554729] kasan_save_free_info+0x2b/0x50 [ 60.555260] __kasan_slab_free+0x10a/0x190 [ 60.555797] kmem_cache_free+0x10d/0x4d0 [ 60.556302] rcu_core+0x8c8/0x2860 [ 60.556742] __do_softirq+0x1b7/0x7d4 [ 60.557217] [ 60.557433] Last potentially related work creation: [ 60.558028] kasan_save_stack+0x22/0x50 [ 60.558537] __kasan_record_aux_stack+0x8e/0xa0 [ 60.559108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.559749] remove_vma+0x139/0x170 [ 60.560198] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.560814] do_vmi_munmap+0x1f1/0x2b0 [ 60.561296] __vm_munmap+0x138/0x3a0 [ 60.561767] __x64_sys_munmap+0x59/0x80 [ 60.562273] do_syscall_64+0x3f/0x90 [ 60.562753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.563397] [ 60.563611] The buggy address belongs to the object at ffff8880190cd910 [ 60.563611] which belongs to the cache vm_area_struct of size 168 [ 60.565085] The buggy address is located 88 bytes inside of [ 60.565085] freed 168-byte region [ffff8880190cd910, ffff8880190cd9b8) [ 60.566491] [ 60.566707] The buggy address belongs to the physical page: [ 60.567361] page:00000000e8e4d1ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x190cd [ 60.568457] memcg:ffff88801a37ee01 [ 60.568880] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.569527] page_type: 0xffffffff() [ 60.569978] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.570919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a37ee01 [ 60.571837] page dumped because: kasan: bad access detected [ 60.572517] [ 60.572729] Memory state around the buggy address: [ 60.573309] ffff8880190cd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 60.574175] ffff8880190cd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 60.575036] >ffff8880190cd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.575891] ^ [ 60.576683] ffff8880190cd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 60.577542] ffff8880190cda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.578428] ================================================================== [ 60.579352] Disabling lock debugging due to kernel taint [ 62.426345] BUG: Bad rss-counter state mm:0000000092a5e27e type:MM_FILEPAGES val:33 [ 62.427362] BUG: Bad rss-counter state mm:0000000092a5e27e type:MM_ANONPAGES val:22 [ 62.872833] BUG: Bad rss-counter state mm:000000003d0a0104 type:MM_FILEPAGES val:33 [ 62.873884] BUG: Bad rss-counter state mm:000000003d0a0104 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19376' (ECDSA) to the list of known hosts. 2023/06/20 19:17:25 fuzzer started 2023/06/20 19:17:26 dialing manager at localhost:36067 2023/06/20 19:17:26 checking machine... 2023/06/20 19:17:26 checking revisions... [ 63.585046] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:17:26 testing simple program... [ 63.638211] cgroup: Unknown subsys name 'net' [ 63.676509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:17:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83650bf7 RDX=000000000002650c RSI=000000000002650b RDI=ffffffff86582e20 RBP=ffff88806ce09a98 RSP=ffff88806ce099d0 R8 =0000000000000000 R9 =ffff88806ce09a80 R10=0000000000038001 R11=000000000008b06b R12=ffff88806ce09aa0 R13=ffff88806ce09a88 R14=ffff88806ce09a81 R15=ffff88806ce09a40 RIP=ffffffff811307e9 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 00007f7a92eb0900 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=00007f7a934680b0 CR3=000000001bd6a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe7cd2fa3c0 CR3=000000000c59c000 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=3592499625d31b955e4eba7badfe1067 XMM02=2c67c8bc2e329bc3000000000011dee8 XMM03=fb795ef6d65770560000000000122688 XMM04=c14461fb073b38b300000000000ae988 XMM05=dfcdbad4f1609c370000000000132570 XMM06=806171799158d96700000000001323f8 XMM07=e042d86d42eb936e0000000000122908 XMM08=9d966c6cbdead5de000000000011df48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000