syzkaller login: [ 28.680805] BUG: Bad rss-counter state mm:00000000c127788d type:MM_FILEPAGES val:33 [ 28.682458] BUG: Bad rss-counter state mm:00000000c127788d type:MM_ANONPAGES val:22 [ 28.845387] ================================================================== [ 28.846336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.847311] Read of size 8 at addr ffff8880142a5a50 by task sshd/221 [ 28.848108] [ 28.848417] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.849329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.850348] Call Trace: [ 28.850679] [ 28.850974] dump_stack_lvl+0x91/0xf0 [ 28.851511] print_report+0xcc/0x620 [ 28.852016] ? __virt_addr_valid+0x102/0x340 [ 28.852578] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.853214] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.853879] kasan_report+0xbe/0xf0 [ 28.854370] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.855022] vma_interval_tree_remove+0xc75/0xec0 [ 28.855636] vma_prepare+0xc54/0x11a0 [ 28.856119] __split_vma+0x5af/0x950 [ 28.856603] ? __pfx___split_vma+0x10/0x10 [ 28.857157] ? find_held_lock+0x2c/0x110 [ 28.857690] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.858284] ? lock_is_held_type+0x9f/0x120 [ 28.858868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.859511] ? mtree_range_walk+0x632/0x900 [ 28.860074] ? mas_walk+0x5c7/0x7c0 [ 28.860566] do_vmi_munmap+0x1f1/0x2b0 [ 28.861077] mmap_region+0x1f9/0x2660 [ 28.861587] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.862114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.862873] ? __pfx_lock_acquire+0x10/0x10 [ 28.863435] ? __pfx_mmap_region+0x10/0x10 [ 28.864000] ? security_mmap_addr+0x7d/0xa0 [ 28.864554] ? get_unmapped_area+0x1f5/0x3f0 [ 28.865130] do_mmap+0x854/0xf00 [ 28.865609] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.866128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.866717] ksys_mmap_pgoff+0x3af/0x500 [ 28.867247] do_syscall_64+0x3f/0x90 [ 28.867745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.868418] RIP: 0033:0x7f0060d7ed82 [ 28.868898] 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 [ 28.871112] RSP: 002b:00007fff74455aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.872047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0060d7ed82 [ 28.872928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00601b8000 [ 28.873818] RBP: 00007f00601b8000 R08: 0000000000000009 R09: 0000000000001000 [ 28.874699] R10: 0000000000000812 R11: 0000000000000206 R12: 000056300bcd9ec0 [ 28.875570] R13: 00007fff74455ac0 R14: 00007fff74455af0 R15: 00007fff74455e50 [ 28.876487] [ 28.876802] [ 28.877025] Allocated by task 214: [ 28.877487] kasan_save_stack+0x22/0x50 [ 28.878009] kasan_set_track+0x25/0x30 [ 28.878554] __kasan_slab_alloc+0x59/0x70 [ 28.879115] kmem_cache_alloc+0x16b/0x370 [ 28.879649] vm_area_dup+0x20/0x160 [ 28.880116] __split_vma+0x170/0x950 [ 28.880607] split_vma+0xc6/0x110 [ 28.881057] mprotect_fixup+0x8d2/0xb30 [ 28.881589] do_mprotect_pkey+0x87e/0xd40 [ 28.882131] __x64_sys_mprotect+0x78/0xc0 [ 28.882677] do_syscall_64+0x3f/0x90 [ 28.883167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.883835] [ 28.884057] Freed by task 214: [ 28.884458] kasan_save_stack+0x22/0x50 [ 28.884985] kasan_set_track+0x25/0x30 [ 28.885514] kasan_save_free_info+0x2b/0x50 [ 28.886073] __kasan_slab_free+0x10a/0x190 [ 28.886626] kmem_cache_free+0x10d/0x4d0 [ 28.887150] rcu_core+0x8c8/0x2860 [ 28.887621] __do_softirq+0x1b7/0x7d4 [ 28.888120] [ 28.888341] Last potentially related work creation: [ 28.888940] kasan_save_stack+0x22/0x50 [ 28.889470] __kasan_record_aux_stack+0x8e/0xa0 [ 28.890062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.890729] remove_vma+0x139/0x170 [ 28.891195] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.891776] do_vmi_munmap+0x1f1/0x2b0 [ 28.892280] __vm_munmap+0x138/0x3a0 [ 28.892771] __x64_sys_munmap+0x59/0x80 [ 28.893295] do_syscall_64+0x3f/0x90 [ 28.893784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.894450] [ 28.894670] The buggy address belongs to the object at ffff8880142a59f8 [ 28.894670] which belongs to the cache vm_area_struct of size 168 [ 28.896218] The buggy address is located 88 bytes inside of [ 28.896218] freed 168-byte region [ffff8880142a59f8, ffff8880142a5aa0) [ 28.897699] [ 28.897923] The buggy address belongs to the physical page: [ 28.898604] page:0000000053086e7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x142a5 [ 28.899733] memcg:ffff888019706701 [ 28.900173] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.900839] page_type: 0xffffffff() [ 28.901305] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.902270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019706701 [ 28.903196] page dumped because: kasan: bad access detected [ 28.903864] [ 28.904078] Memory state around the buggy address: [ 28.904662] ffff8880142a5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.905534] ffff8880142a5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.906388] >ffff8880142a5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.907235] ^ [ 28.907936] ffff8880142a5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.908786] ffff8880142a5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.909659] ================================================================== [ 28.910661] Disabling lock debugging due to kernel taint [ 30.804778] BUG: Bad rss-counter state mm:00000000d1d7c425 type:MM_FILEPAGES val:33 [ 30.805950] BUG: Bad rss-counter state mm:00000000d1d7c425 type:MM_ANONPAGES val:22 [ 31.281223] BUG: Bad rss-counter state mm:00000000d10d31f5 type:MM_FILEPAGES val:33 [ 31.282427] BUG: Bad rss-counter state mm:00000000d10d31f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2328' (ECDSA) to the list of known hosts. 2023/06/20 20:09:39 fuzzer started 2023/06/20 20:09:39 dialing manager at localhost:36067 2023/06/20 20:09:39 checking machine... 2023/06/20 20:09:39 checking revisions... [ 31.918644] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:09:40 testing simple program... [ 31.958720] cgroup: Unknown subsys name 'net' [ 32.011561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:09:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff813c27e1 RDI=ffffffff8562be48 RBP=ffff88806ce2b988 RSP=ffff88806ce09ec8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=0000000000000046 R13=dffffc0000000000 R14=ffff88806ce2baa8 R15=ffff88806ce2b940 RIP=ffffffff812d8654 RFL=00000082 [--S----] 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 00007fa20d7f3900 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=00007fa20ddab0b0 CR3=000000000f978000 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=00007f25485be000 CR3=000000000d44a000 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=76f8f58fb98b6c9c7847d0a22d1f4a6a XMM02=000000000011ae78eff9b2d0a8fce9cb XMM03=000000000011af482c67c8bc2e329bc3 XMM04=4769a11f371fd48c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131b08 XMM06=c291bd5c70af25b90000000000131990 XMM07=e042d86d42eb936e0000000000121ee0 XMM08=637c8bd3f14437f1000000000011af48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000