syzkaller login: [ 30.301714] BUG: Bad rss-counter state mm:000000005a0ceeae type:MM_FILEPAGES val:33 [ 30.302361] BUG: Bad rss-counter state mm:000000005a0ceeae type:MM_ANONPAGES val:22 [ 30.420042] ================================================================== [ 30.420980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.421692] Read of size 8 at addr ffff88800e061140 by task sshd/222 [ 30.422274] [ 30.422439] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.423212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.423980] Call Trace: [ 30.424224] [ 30.424443] dump_stack_lvl+0x91/0xf0 [ 30.424834] print_report+0xcc/0x620 [ 30.425206] ? __virt_addr_valid+0x102/0x340 [ 30.425627] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.426090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.426557] kasan_report+0xbe/0xf0 [ 30.426918] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.427384] vma_interval_tree_remove+0xc75/0xec0 [ 30.427853] vma_prepare+0xc54/0x11a0 [ 30.428216] __split_vma+0x5af/0x950 [ 30.428575] ? __pfx___split_vma+0x10/0x10 [ 30.428982] ? find_held_lock+0x2c/0x110 [ 30.429385] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.429818] ? lock_is_held_type+0x9f/0x120 [ 30.430235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.430702] ? mtree_range_walk+0x632/0x900 [ 30.431130] ? mas_walk+0x5c7/0x7c0 [ 30.431499] do_vmi_munmap+0x1f1/0x2b0 [ 30.431893] mmap_region+0x1f9/0x2660 [ 30.432263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.432645] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.433107] ? __pfx_lock_acquire+0x10/0x10 [ 30.433438] ? __pfx_mmap_region+0x10/0x10 [ 30.433761] ? security_mmap_addr+0x7d/0xa0 [ 30.434098] ? get_unmapped_area+0x1f5/0x3f0 [ 30.434441] do_mmap+0x854/0xf00 [ 30.434712] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.435030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.435383] ksys_mmap_pgoff+0x3af/0x500 [ 30.435715] do_syscall_64+0x3f/0x90 [ 30.436009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.436418] RIP: 0033:0x7f788cba3d82 [ 30.436704] 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 [ 30.438038] RSP: 002b:00007ffd3e043ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.438619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f788cba3d82 [ 30.439157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f788bfdd000 [ 30.439694] RBP: 00007f788bfdd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.440253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8eac0cec0 [ 30.440802] R13: 00007ffd3e043ec0 R14: 00007ffd3e043ef0 R15: 00007ffd3e044250 [ 30.441358] [ 30.441545] [ 30.441679] Allocated by task 215: [ 30.441950] kasan_save_stack+0x22/0x50 [ 30.442265] kasan_set_track+0x25/0x30 [ 30.442578] __kasan_slab_alloc+0x59/0x70 [ 30.442916] kmem_cache_alloc+0x16b/0x370 [ 30.443251] vm_area_dup+0x20/0x160 [ 30.443545] __split_vma+0x170/0x950 [ 30.443843] split_vma+0xc6/0x110 [ 30.444128] mprotect_fixup+0x8d2/0xb30 [ 30.444451] do_mprotect_pkey+0x87e/0xd40 [ 30.444787] __x64_sys_mprotect+0x78/0xc0 [ 30.445124] do_syscall_64+0x3f/0x90 [ 30.445421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.445836] [ 30.445972] Freed by task 204: [ 30.446224] kasan_save_stack+0x22/0x50 [ 30.446538] kasan_set_track+0x25/0x30 [ 30.446858] kasan_save_free_info+0x2b/0x50 [ 30.447183] __kasan_slab_free+0x10a/0x190 [ 30.447524] kmem_cache_free+0x10d/0x4d0 [ 30.447849] rcu_core+0x8c8/0x2860 [ 30.448135] __do_softirq+0x1b7/0x7d4 [ 30.448440] [ 30.448576] Last potentially related work creation: [ 30.448960] kasan_save_stack+0x22/0x50 [ 30.449285] __kasan_record_aux_stack+0x8e/0xa0 [ 30.449671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.450075] remove_vma+0x139/0x170 [ 30.450358] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.450711] do_vmi_munmap+0x1f1/0x2b0 [ 30.451020] __vm_munmap+0x138/0x3a0 [ 30.451315] __x64_sys_munmap+0x59/0x80 [ 30.451643] do_syscall_64+0x3f/0x90 [ 30.451947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.452369] [ 30.452505] Second to last potentially related work creation: [ 30.452940] kasan_save_stack+0x22/0x50 [ 30.453264] __kasan_record_aux_stack+0x8e/0xa0 [ 30.453644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.454039] remove_vma+0x139/0x170 [ 30.454327] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.454679] do_vmi_munmap+0x1f1/0x2b0 [ 30.455002] mmap_region+0x1f9/0x2660 [ 30.455299] do_mmap+0x854/0xf00 [ 30.455576] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.455882] ksys_mmap_pgoff+0x3af/0x500 [ 30.456201] do_syscall_64+0x3f/0x90 [ 30.456506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.456927] [ 30.457059] The buggy address belongs to the object at ffff88800e0610e8 [ 30.457059] which belongs to the cache vm_area_struct of size 168 [ 30.458017] The buggy address is located 88 bytes inside of [ 30.458017] freed 168-byte region [ffff88800e0610e8, ffff88800e061190) [ 30.458929] [ 30.459064] The buggy address belongs to the physical page: [ 30.459494] page:00000000754c9bd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe061 [ 30.460208] memcg:ffff88800ce56501 [ 30.460479] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.460905] page_type: 0xffffffff() [ 30.461196] raw: 0100000000000200 ffff8880087a0c80 ffffea0000314480 dead000000000008 [ 30.461778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce56501 [ 30.462349] page dumped because: kasan: bad access detected [ 30.462758] [ 30.462891] Memory state around the buggy address: [ 30.463251] ffff88800e061000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.463798] ffff88800e061080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.464346] >ffff88800e061100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.464895] ^ [ 30.465302] ffff88800e061180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.465823] ffff88800e061200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.466332] ================================================================== [ 30.466911] Disabling lock debugging due to kernel taint [ 32.376333] BUG: Bad rss-counter state mm:00000000fb83aa17 type:MM_FILEPAGES val:33 [ 32.377449] BUG: Bad rss-counter state mm:00000000fb83aa17 type:MM_ANONPAGES val:22 [ 32.795344] BUG: Bad rss-counter state mm:000000003e1d4832 type:MM_FILEPAGES val:33 [ 32.796373] BUG: Bad rss-counter state mm:000000003e1d4832 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41467' (ECDSA) to the list of known hosts. 2023/06/20 20:50:51 fuzzer started 2023/06/20 20:50:52 dialing manager at localhost:36067 2023/06/20 20:50:52 checking machine... 2023/06/20 20:50:52 checking revisions... [ 33.490003] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:50:52 testing simple program... [ 33.533223] cgroup: Unknown subsys name 'net' [ 33.568136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:51 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=00007ffe8cbc0d78 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=00007f9aa99bb51000005593c35e0790 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=0000001681b9bf20 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=00000000000536f0 RBP=ffff88806cf28140 RSP=ffff88806cf09868 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eed48 R11=0000000000000001 R12=00000000000536f0 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----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 00007fda17396900 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=00007fda1734a01c CR3=000000001a6f2000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000