syzkaller login: [ 35.769360] BUG: Bad rss-counter state mm:00000000b642fbe7 type:MM_FILEPAGES val:33 [ 35.770144] BUG: Bad rss-counter state mm:00000000b642fbe7 type:MM_ANONPAGES val:22 [ 35.933770] ================================================================== [ 35.934717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.935659] Read of size 8 at addr ffff88800caab140 by task sshd/219 [ 35.936469] [ 35.936684] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.937732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.938742] Call Trace: [ 35.939063] [ 35.939357] dump_stack_lvl+0x91/0xf0 [ 35.939910] print_report+0xcc/0x620 [ 35.940397] ? __virt_addr_valid+0x102/0x340 [ 35.940946] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.941564] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.942184] kasan_report+0xbe/0xf0 [ 35.942660] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.943280] vma_interval_tree_remove+0xc75/0xec0 [ 35.943902] vma_prepare+0xc54/0x11a0 [ 35.944375] __split_vma+0x5af/0x950 [ 35.944854] ? __pfx___split_vma+0x10/0x10 [ 35.945384] ? find_held_lock+0x2c/0x110 [ 35.945907] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.946479] ? lock_is_held_type+0x9f/0x120 [ 35.947026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.947629] ? mtree_range_walk+0x632/0x900 [ 35.948213] ? mas_walk+0x5c7/0x7c0 [ 35.948691] do_vmi_munmap+0x1f1/0x2b0 [ 35.949182] mmap_region+0x1f9/0x2660 [ 35.949671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.950182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.950906] ? __pfx_lock_acquire+0x10/0x10 [ 35.951443] ? __pfx_mmap_region+0x10/0x10 [ 35.951991] ? security_mmap_addr+0x7d/0xa0 [ 35.952525] ? get_unmapped_area+0x1f5/0x3f0 [ 35.953077] do_mmap+0x854/0xf00 [ 35.953523] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.954023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.954595] ksys_mmap_pgoff+0x3af/0x500 [ 35.955105] do_syscall_64+0x3f/0x90 [ 35.955599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.956278] RIP: 0033:0x7f76cfa3ed82 [ 35.956751] 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 [ 35.958895] RSP: 002b:00007ffe6cde11b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.959817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76cfa3ed82 [ 35.960678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76cee78000 [ 35.961537] RBP: 00007f76cee78000 R08: 0000000000000009 R09: 0000000000001000 [ 35.962394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a13c4eaec0 [ 35.963239] R13: 00007ffe6cde11d0 R14: 00007ffe6cde1200 R15: 00007ffe6cde1560 [ 35.964108] [ 35.964404] [ 35.964627] Allocated by task 212: [ 35.965061] kasan_save_stack+0x22/0x50 [ 35.965570] kasan_set_track+0x25/0x30 [ 35.966067] __kasan_slab_alloc+0x59/0x70 [ 35.966585] kmem_cache_alloc+0x16b/0x370 [ 35.967097] vm_area_dup+0x20/0x160 [ 35.967561] __split_vma+0x170/0x950 [ 35.968054] split_vma+0xc6/0x110 [ 35.968498] mprotect_fixup+0x8d2/0xb30 [ 35.969011] do_mprotect_pkey+0x87e/0xd40 [ 35.969534] __x64_sys_mprotect+0x78/0xc0 [ 35.970059] do_syscall_64+0x3f/0x90 [ 35.970532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.971198] [ 35.971414] Freed by task 19: [ 35.971804] kasan_save_stack+0x22/0x50 [ 35.972306] kasan_set_track+0x25/0x30 [ 35.972795] kasan_save_free_info+0x2b/0x50 [ 35.973328] __kasan_slab_free+0x10a/0x190 [ 35.973867] kmem_cache_free+0x10d/0x4d0 [ 35.974376] rcu_core+0x8c8/0x2860 [ 35.974822] __do_softirq+0x1b7/0x7d4 [ 35.975299] [ 35.975516] Last potentially related work creation: [ 35.976127] kasan_save_stack+0x22/0x50 [ 35.976631] __kasan_record_aux_stack+0x8e/0xa0 [ 35.977204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.977841] remove_vma+0x139/0x170 [ 35.978295] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.978865] do_vmi_munmap+0x1f1/0x2b0 [ 35.979440] __vm_munmap+0x138/0x3a0 [ 35.979929] __x64_sys_munmap+0x59/0x80 [ 35.980431] do_syscall_64+0x3f/0x90 [ 35.980909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.981566] [ 35.981792] Second to last potentially related work creation: [ 35.982480] kasan_save_stack+0x22/0x50 [ 35.982978] __kasan_record_aux_stack+0x8e/0xa0 [ 35.983552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.984211] remove_vma+0x139/0x170 [ 35.984666] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.985227] do_vmi_munmap+0x1f1/0x2b0 [ 35.985715] mmap_region+0x1f9/0x2660 [ 35.986194] do_mmap+0x854/0xf00 [ 35.986622] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.987117] ksys_mmap_pgoff+0x3af/0x500 [ 35.987629] do_syscall_64+0x3f/0x90 [ 35.988132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.988791] [ 35.989006] The buggy address belongs to the object at ffff88800caab0e8 [ 35.989006] which belongs to the cache vm_area_struct of size 168 [ 35.990478] The buggy address is located 88 bytes inside of [ 35.990478] freed 168-byte region [ffff88800caab0e8, ffff88800caab190) [ 35.991906] [ 35.992124] The buggy address belongs to the physical page: [ 35.992797] page:00000000fe1ac150 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaab [ 35.993892] memcg:ffff88800e660601 [ 35.994316] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.994964] page_type: 0xffffffff() [ 35.995419] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327700 dead000000000008 [ 35.996362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e660601 [ 35.997276] page dumped because: kasan: bad access detected [ 35.997938] [ 35.998153] Memory state around the buggy address: [ 35.998741] ffff88800caab000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.999604] ffff88800caab080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.000500] >ffff88800caab100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.001357] ^ [ 36.002001] ffff88800caab180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 36.002860] ffff88800caab200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.003721] ================================================================== [ 36.004741] Disabling lock debugging due to kernel taint [ 38.401610] BUG: Bad rss-counter state mm:00000000281fe88e type:MM_FILEPAGES val:33 [ 38.402770] BUG: Bad rss-counter state mm:00000000281fe88e type:MM_ANONPAGES val:22 [ 38.944628] BUG: Bad rss-counter state mm:000000007486cfb6 type:MM_FILEPAGES val:33 [ 38.945820] BUG: Bad rss-counter state mm:000000007486cfb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42432' (ECDSA) to the list of known hosts. 2023/06/21 00:35:01 fuzzer started 2023/06/21 00:35:01 dialing manager at localhost:36067 2023/06/21 00:35:01 checking machine... 2023/06/21 00:35:01 checking revisions... [ 39.584342] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:35:01 testing simple program... [ 39.643891] cgroup: Unknown subsys name 'net' [ 39.710143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:00 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c13a2 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806ce09d00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff812d8f20 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 00007f3d71dcb900 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=00007f3d72380650 CR3=000000001bd72000 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=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff815a2ee5 RDI=ffffffff852bf748 RBP=ffff88801026fd28 RSP=ffff88801026fc58 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=0000000000000061 R13=ffff88801026fd60 R14=0000000000000061 R15=ffffc90000646078 RIP=ffffffff814c0871 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 00007f01923d3900 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=00007f019184b970 CR3=000000000d868000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c19d348394a0dc7200000000000ae988 XMM05=22f327a5de384d5700000000001341a0 XMM06=806171799158d9670000000000132c20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000