syzkaller login: [ 31.541411] BUG: Bad rss-counter state mm:000000003529a591 type:MM_FILEPAGES val:33 [ 31.542784] BUG: Bad rss-counter state mm:000000003529a591 type:MM_ANONPAGES val:22 [ 31.707570] ================================================================== [ 31.708625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.709670] Read of size 8 at addr ffff888018081c20 by task sshd/219 [ 31.710685] [ 31.710937] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.711925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.713094] Call Trace: [ 31.713469] [ 31.713797] dump_stack_lvl+0x91/0xf0 [ 31.714362] print_report+0xcc/0x620 [ 31.714899] ? __virt_addr_valid+0x102/0x340 [ 31.715535] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716968] kasan_report+0xbe/0xf0 [ 31.717507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.718201] vma_interval_tree_remove+0xc75/0xec0 [ 31.718877] vma_prepare+0xc54/0x11a0 [ 31.719416] __split_vma+0x5af/0x950 [ 31.719946] ? __pfx___split_vma+0x10/0x10 [ 31.720553] ? find_held_lock+0x2c/0x110 [ 31.721132] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.721714] ? lock_is_held_type+0x9f/0x120 [ 31.722277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.722888] ? mtree_range_walk+0x632/0x900 [ 31.723447] ? mas_walk+0x5c7/0x7c0 [ 31.723925] do_vmi_munmap+0x1f1/0x2b0 [ 31.724461] mmap_region+0x1f9/0x2660 [ 31.724948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.725456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.726166] ? __pfx_lock_acquire+0x10/0x10 [ 31.726702] ? __pfx_mmap_region+0x10/0x10 [ 31.727234] ? security_mmap_addr+0x7d/0xa0 [ 31.727769] ? get_unmapped_area+0x1f5/0x3f0 [ 31.728345] do_mmap+0x854/0xf00 [ 31.728786] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.729287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729854] ksys_mmap_pgoff+0x3af/0x500 [ 31.730361] do_syscall_64+0x3f/0x90 [ 31.730837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731499] RIP: 0033:0x7f57a5f24d82 [ 31.731958] 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 [ 31.734152] RSP: 002b:00007ffd1ac7bd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.735066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57a5f24d82 [ 31.735937] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57a535e000 [ 31.736803] RBP: 00007f57a535e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.737659] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfd643cec0 [ 31.738510] R13: 00007ffd1ac7bd20 R14: 00007ffd1ac7bd50 R15: 00007ffd1ac7c0b0 [ 31.739388] [ 31.739693] [ 31.739916] Allocated by task 212: [ 31.740378] kasan_save_stack+0x22/0x50 [ 31.740906] kasan_set_track+0x25/0x30 [ 31.741432] __kasan_slab_alloc+0x59/0x70 [ 31.741976] kmem_cache_alloc+0x16b/0x370 [ 31.742527] vm_area_dup+0x20/0x160 [ 31.742998] __split_vma+0x170/0x950 [ 31.743483] split_vma+0xc6/0x110 [ 31.743936] mprotect_fixup+0x8d2/0xb30 [ 31.744495] do_mprotect_pkey+0x87e/0xd40 [ 31.745052] __x64_sys_mprotect+0x78/0xc0 [ 31.745599] do_syscall_64+0x3f/0x90 [ 31.746098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746777] [ 31.747002] Freed by task 212: [ 31.747419] kasan_save_stack+0x22/0x50 [ 31.747956] kasan_set_track+0x25/0x30 [ 31.748491] kasan_save_free_info+0x2b/0x50 [ 31.749061] __kasan_slab_free+0x10a/0x190 [ 31.749626] kmem_cache_free+0x10d/0x4d0 [ 31.750167] rcu_core+0x8c8/0x2860 [ 31.750644] __do_softirq+0x1b7/0x7d4 [ 31.751154] [ 31.751386] Last potentially related work creation: [ 31.752062] kasan_save_stack+0x22/0x50 [ 31.752614] __kasan_record_aux_stack+0x8e/0xa0 [ 31.753223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.753900] remove_vma+0x139/0x170 [ 31.754378] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.754958] do_vmi_munmap+0x1f1/0x2b0 [ 31.755475] __vm_munmap+0x138/0x3a0 [ 31.755973] __x64_sys_munmap+0x59/0x80 [ 31.756510] do_syscall_64+0x3f/0x90 [ 31.757015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.757698] [ 31.757920] The buggy address belongs to the object at ffff888018081bc8 [ 31.757920] which belongs to the cache vm_area_struct of size 168 [ 31.759501] The buggy address is located 88 bytes inside of [ 31.759501] freed 168-byte region [ffff888018081bc8, ffff888018081c70) [ 31.761008] [ 31.761233] The buggy address belongs to the physical page: [ 31.761941] page:000000009a381505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18081 [ 31.763109] memcg:ffff88801833b901 [ 31.763567] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.764264] page_type: 0xffffffff() [ 31.764742] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.765724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801833b901 [ 31.766698] page dumped because: kasan: bad access detected [ 31.767407] [ 31.767636] Memory state around the buggy address: [ 31.768260] ffff888018081b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.769182] ffff888018081b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.770096] >ffff888018081c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.770999] ^ [ 31.771559] ffff888018081c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.772506] ffff888018081d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.773409] ================================================================== [ 31.774383] Disabling lock debugging due to kernel taint [ 33.681204] BUG: Bad rss-counter state mm:00000000f220a0a6 type:MM_FILEPAGES val:33 [ 33.682424] BUG: Bad rss-counter state mm:00000000f220a0a6 type:MM_ANONPAGES val:22 [ 34.179191] BUG: Bad rss-counter state mm:00000000dd9bcd23 type:MM_FILEPAGES val:33 [ 34.180186] BUG: Bad rss-counter state mm:00000000dd9bcd23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15402' (ECDSA) to the list of known hosts. 2023/06/20 13:38:32 fuzzer started 2023/06/20 13:38:32 dialing manager at localhost:36067 2023/06/20 13:38:32 checking machine... 2023/06/20 13:38:32 checking revisions... [ 34.892756] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:38:32 testing simple program... [ 34.951748] cgroup: Unknown subsys name 'net' [ 35.009815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:38:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812888a0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=dffffc0000000000 RSP=ffffffff85407e18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=ffffffff8542a6c0 R15=0000000000000000 RIP=ffffffff810ab104 RFL=00000047 [---Z-PC] 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 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=00007fff15d0ab08 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=00007fe39b2cd510000055aa57793790 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=0000000000000000 RBX=ffff88801920fdf0 RCX=0000000000000000 RDX=ffff88800ed40000 RSI=ffffffff81859990 RDI=0000000000000007 RBP=0000000000088000 RSP=ffff88801920fd88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88801920fea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81859990 RFL=00000293 [--S-A-C] 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 00007f8448b3b900 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=00007f84490f30b0 CR3=00000000181e4000 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