syzkaller login: [ 30.043169] BUG: Bad rss-counter state mm:000000003b09f992 type:MM_FILEPAGES val:33 [ 30.044428] BUG: Bad rss-counter state mm:000000003b09f992 type:MM_ANONPAGES val:22 [ 30.081207] ================================================================== [ 30.081900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.082618] Read of size 8 at addr ffff88800ea675c8 by task sshd/221 [ 30.083184] [ 30.083348] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.084015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.084754] Call Trace: [ 30.084997] <TASK> [ 30.085284] dump_stack_lvl+0x91/0xf0 [ 30.085634] print_report+0xcc/0x620 [ 30.085909] ? __virt_addr_valid+0x102/0x340 [ 30.086216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.086560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.086901] kasan_report+0xbe/0xf0 [ 30.087166] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.087520] vma_interval_tree_remove+0xc75/0xec0 [ 30.087865] vma_prepare+0xc54/0x11a0 [ 30.088134] __split_vma+0x5af/0x950 [ 30.088396] ? __pfx___split_vma+0x10/0x10 [ 30.088688] ? find_held_lock+0x2c/0x110 [ 30.088981] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.089295] ? lock_is_held_type+0x9f/0x120 [ 30.089600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.089937] ? mtree_range_walk+0x632/0x900 [ 30.090245] ? mas_walk+0x5c7/0x7c0 [ 30.090513] do_vmi_munmap+0x1f1/0x2b0 [ 30.090789] mmap_region+0x1f9/0x2660 [ 30.091060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.091348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.091754] ? __pfx_lock_acquire+0x10/0x10 [ 30.092052] ? __pfx_mmap_region+0x10/0x10 [ 30.092348] ? security_mmap_addr+0x7d/0xa0 [ 30.092648] ? get_unmapped_area+0x1f5/0x3f0 [ 30.092958] do_mmap+0x854/0xf00 [ 30.093202] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.093478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.093791] ksys_mmap_pgoff+0x3af/0x500 [ 30.094071] do_syscall_64+0x3f/0x90 [ 30.094340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.094703] RIP: 0033:0x7f0a06cf2d82 [ 30.094957] 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 [ 30.096153] RSP: 002b:00007fffcac2f168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.096655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a06cf2d82 [ 30.097128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a0612c000 [ 30.097600] RBP: 00007f0a0612c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.098073] R10: 0000000000000812 R11: 0000000000000206 R12: 000056061bb59ec0 [ 30.098547] R13: 00007fffcac2f180 R14: 00007fffcac2f1b0 R15: 00007fffcac2f510 [ 30.099031] </TASK> [ 30.099193] [ 30.099313] Allocated by task 214: [ 30.099551] kasan_save_stack+0x22/0x50 [ 30.099842] kasan_set_track+0x25/0x30 [ 30.100113] __kasan_slab_alloc+0x59/0x70 [ 30.100403] kmem_cache_alloc+0x16b/0x370 [ 30.100690] vm_area_dup+0x20/0x160 [ 30.100944] __split_vma+0x170/0x950 [ 30.101202] split_vma+0xc6/0x110 [ 30.101449] mprotect_fixup+0x8d2/0xb30 [ 30.101734] do_mprotect_pkey+0x87e/0xd40 [ 30.102021] __x64_sys_mprotect+0x78/0xc0 [ 30.102311] do_syscall_64+0x3f/0x90 [ 30.102580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.102940] [ 30.103059] Freed by task 211: [ 30.103279] kasan_save_stack+0x22/0x50 [ 30.103557] kasan_set_track+0x25/0x30 [ 30.103847] kasan_save_free_info+0x2b/0x50 [ 30.104140] __kasan_slab_free+0x10a/0x190 [ 30.104438] kmem_cache_free+0x10d/0x4d0 [ 30.104717] rcu_core+0x8c8/0x2860 [ 30.104963] __do_softirq+0x1b7/0x7d4 [ 30.105231] [ 30.105350] Last potentially related work creation: [ 30.105683] kasan_save_stack+0x22/0x50 [ 30.105963] __kasan_record_aux_stack+0x8e/0xa0 [ 30.106284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.106640] remove_vma+0x139/0x170 [ 30.106891] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.107199] do_vmi_munmap+0x1f1/0x2b0 [ 30.107471] __vm_munmap+0x138/0x3a0 [ 30.107736] __x64_sys_munmap+0x59/0x80 [ 30.108011] do_syscall_64+0x3f/0x90 [ 30.108280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.108640] [ 30.108757] The buggy address belongs to the object at ffff88800ea67570 [ 30.108757] which belongs to the cache vm_area_struct of size 168 [ 30.109568] The buggy address is located 88 bytes inside of [ 30.109568] freed 168-byte region [ffff88800ea67570, ffff88800ea67618) [ 30.110310] [ 30.110428] The buggy address belongs to the physical page: [ 30.110782] page:00000000143fe316 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea67 [ 30.111356] memcg:ffff88800e161801 [ 30.111582] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.111943] page_type: 0xffffffff() [ 30.112182] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.112670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e161801 [ 30.113147] page dumped because: kasan: bad access detected [ 30.113499] [ 30.113613] Memory state around the buggy address: [ 30.113923] ffff88800ea67480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.114375] ffff88800ea67500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.114827] >ffff88800ea67580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.115274] ^ [ 30.115623] ffff88800ea67600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.116082] ffff88800ea67680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.116529] ================================================================== [ 30.117021] Disabling lock debugging due to kernel taint [ 31.893717] BUG: Bad rss-counter state mm:00000000398f850b type:MM_FILEPAGES val:33 [ 31.895095] BUG: Bad rss-counter state mm:00000000398f850b type:MM_ANONPAGES val:22 [ 32.378120] BUG: Bad rss-counter state mm:0000000037d06b78 type:MM_FILEPAGES val:33 [ 32.379783] BUG: Bad rss-counter state mm:0000000037d06b78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36962' (ECDSA) to the list of known hosts. 2023/06/20 13:27:43 fuzzer started 2023/06/20 13:27:43 dialing manager at localhost:36067 2023/06/20 13:27:43 checking machine... 2023/06/20 13:27:43 checking revisions... [ 33.126761] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:27:44 testing simple program... [ 33.180335] cgroup: Unknown subsys name 'net' [ 33.219818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880166c1b40 RSI=ffffffff8162a0df RDI=0000000000000007 RBP=ffffea000060aec0 RSP=ffff8880147ff8f8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=ffff8880147ff938 RIP=ffffffff8162a0df 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 00007f83a1297900 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=00007f83a184f0b0 CR3=00000000159a0000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=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 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=00007f8d942afa30 CR3=000000000d5ca000 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=2a0fb499f9c54e8e8f4a8230e189d0d5 XMM02=ec2efd57dc4c00df000000000011ce60 XMM03=d12642d6b4c7a36b000000000011cf30 XMM04=26beee45c639fce100000000000ae988 XMM05=30f9afa5fb0d00af00000000001318c0 XMM06=c291bd5c70af25b90000000000131548 XMM07=e042d86d42eb936e0000000000121798 XMM08=d12642d6b4c7a36b000000000011cf30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000