syzkaller login: [ 30.663028] BUG: Bad rss-counter state mm:000000009605ab05 type:MM_FILEPAGES val:33 [ 30.664160] BUG: Bad rss-counter state mm:000000009605ab05 type:MM_ANONPAGES val:22 [ 30.698129] ================================================================== [ 30.699147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.700233] Read of size 8 at addr ffff8880101cd140 by task sshd/219 [ 30.701162] [ 30.701382] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.702372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.703529] Call Trace: [ 30.703870] <TASK> [ 30.704227] dump_stack_lvl+0x91/0xf0 [ 30.704833] print_report+0xcc/0x620 [ 30.705343] ? __virt_addr_valid+0x102/0x340 [ 30.705984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707434] kasan_report+0xbe/0xf0 [ 30.707909] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708681] vma_interval_tree_remove+0xc75/0xec0 [ 30.709301] vma_prepare+0xc54/0x11a0 [ 30.709781] __split_vma+0x5af/0x950 [ 30.710264] ? __pfx___split_vma+0x10/0x10 [ 30.710797] ? find_held_lock+0x2c/0x110 [ 30.711491] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712136] ? lock_is_held_type+0x9f/0x120 [ 30.712692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713491] ? mtree_range_walk+0x632/0x900 [ 30.714103] ? mas_walk+0x5c7/0x7c0 [ 30.714605] do_vmi_munmap+0x1f1/0x2b0 [ 30.715182] mmap_region+0x1f9/0x2660 [ 30.715663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717065] ? __pfx_lock_acquire+0x10/0x10 [ 30.717765] ? __pfx_mmap_region+0x10/0x10 [ 30.718411] ? security_mmap_addr+0x7d/0xa0 [ 30.718946] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719495] do_mmap+0x854/0xf00 [ 30.719936] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.720993] ksys_mmap_pgoff+0x3af/0x500 [ 30.721500] do_syscall_64+0x3f/0x90 [ 30.721993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722632] RIP: 0033:0x7f533233bd82 [ 30.723087] 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 [ 30.725199] RSP: 002b:00007ffee123c4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.726117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f533233bd82 [ 30.727167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5331775000 [ 30.728007] RBP: 00007f5331775000 R08: 0000000000000009 R09: 0000000000001000 [ 30.728851] R10: 0000000000000812 R11: 0000000000000206 R12: 000056291f33dd90 [ 30.729704] R13: 00007ffee123c500 R14: 00007ffee123c530 R15: 00007ffee123c890 [ 30.730561] </TASK> [ 30.730863] [ 30.731076] Allocated by task 212: [ 30.731508] kasan_save_stack+0x22/0x50 [ 30.732014] kasan_set_track+0x25/0x30 [ 30.732507] __kasan_slab_alloc+0x59/0x70 [ 30.733030] kmem_cache_alloc+0x16b/0x370 [ 30.733539] vm_area_dup+0x20/0x160 [ 30.734007] __split_vma+0x170/0x950 [ 30.734470] split_vma+0xc6/0x110 [ 30.734910] mprotect_fixup+0x8d2/0xb30 [ 30.735409] do_mprotect_pkey+0x87e/0xd40 [ 30.735926] __x64_sys_mprotect+0x78/0xc0 [ 30.736441] do_syscall_64+0x3f/0x90 [ 30.736914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737567] [ 30.737782] Freed by task 212: [ 30.738191] kasan_save_stack+0x22/0x50 [ 30.738694] kasan_set_track+0x25/0x30 [ 30.739197] kasan_save_free_info+0x2b/0x50 [ 30.739724] __kasan_slab_free+0x10a/0x190 [ 30.740266] kmem_cache_free+0x10d/0x4d0 [ 30.740781] rcu_core+0x8c8/0x2860 [ 30.741231] __do_softirq+0x1b7/0x7d4 [ 30.741727] [ 30.741960] Last potentially related work creation: [ 30.742571] kasan_save_stack+0x22/0x50 [ 30.743072] __kasan_record_aux_stack+0x8e/0xa0 [ 30.743652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.744306] remove_vma+0x139/0x170 [ 30.744770] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.745346] do_vmi_munmap+0x1f1/0x2b0 [ 30.745841] __vm_munmap+0x138/0x3a0 [ 30.746324] __x64_sys_munmap+0x59/0x80 [ 30.746828] do_syscall_64+0x3f/0x90 [ 30.747304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747955] [ 30.748167] The buggy address belongs to the object at ffff8880101cd0e8 [ 30.748167] which belongs to the cache vm_area_struct of size 168 [ 30.749639] The buggy address is located 88 bytes inside of [ 30.749639] freed 168-byte region [ffff8880101cd0e8, ffff8880101cd190) [ 30.751087] [ 30.751303] The buggy address belongs to the physical page: [ 30.751955] page:00000000f009ce29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101cd [ 30.753048] memcg:ffff8880160cdc01 [ 30.753483] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.754147] page_type: 0xffffffff() [ 30.754612] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.755534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880160cdc01 [ 30.756448] page dumped because: kasan: bad access detected [ 30.757140] [ 30.757359] Memory state around the buggy address: [ 30.757964] ffff8880101cd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.758825] ffff8880101cd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.759682] >ffff8880101cd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.760576] ^ [ 30.761252] ffff8880101cd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.762178] ffff8880101cd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.763080] ================================================================== [ 30.764303] Disabling lock debugging due to kernel taint [ 32.941421] BUG: Bad rss-counter state mm:00000000603fcfcd type:MM_FILEPAGES val:33 [ 32.942572] BUG: Bad rss-counter state mm:00000000603fcfcd type:MM_ANONPAGES val:22 [ 33.397747] BUG: Bad rss-counter state mm:0000000078be0926 type:MM_FILEPAGES val:33 [ 33.398833] BUG: Bad rss-counter state mm:0000000078be0926 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35311' (ECDSA) to the list of known hosts. 2023/06/20 19:32:32 fuzzer started 2023/06/20 19:32:33 dialing manager at localhost:36067 2023/06/20 19:32:33 checking machine... 2023/06/20 19:32:33 checking revisions... [ 34.131312] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:32:33 testing simple program... [ 34.183857] cgroup: Unknown subsys name 'net' [ 34.251025] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f41f9c0 RCX=0000000000000001 RDX=1ffff11001e83f4c RSI=ffffffff836340f7 RDI=ffff88800f41f9cc RBP=ffff88800f41fa60 RSP=ffff88800f41f8d8 R8 =0000000000000001 R9 =ffff88800f41f938 R10=0000000000038001 R11=0000000000020c5e R12=ffff88800f41f9c0 R13=0000000000000000 R14=ffff88801a2dd1c0 R15=0000000000092cc0 RIP=ffffffff813ad547 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 00007f668fd8d900 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=00007f6690342650 CR3=0000000016cf6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f29b928b000 CR3=0000000013eda000 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=e4a7f97b604c83b5f5443bf6b06df9b2 XMM02=2c67c8bc2e329bc3000000000011a358 XMM03=fb795ef6d65770560000000000121cd8 XMM04=9449f555ddcf54d600000000000ae988 XMM05=dfcdbad4f1609c370000000000131b48 XMM06=95a24cdad9f2acc900000000001309b0 XMM07=e042d86d42eb936e0000000000121f58 XMM08=6743547a18524471000000000011a3b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000