syzkaller login: [ 28.822732] BUG: Bad rss-counter state mm:00000000c87e6d23 type:MM_FILEPAGES val:33 [ 28.823970] BUG: Bad rss-counter state mm:00000000c87e6d23 type:MM_ANONPAGES val:22 [ 28.861735] ================================================================== [ 28.862717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.863707] Read of size 8 at addr ffff88800e816880 by task sshd/219 [ 28.864503] [ 28.864725] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.865633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.866671] Call Trace: [ 28.867002] <TASK> [ 28.867300] dump_stack_lvl+0x91/0xf0 [ 28.867805] print_report+0xcc/0x620 [ 28.868311] ? __virt_addr_valid+0x102/0x340 [ 28.868881] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.869525] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870184] kasan_report+0xbe/0xf0 [ 28.870681] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871342] vma_interval_tree_remove+0xc75/0xec0 [ 28.871959] vma_prepare+0xc54/0x11a0 [ 28.872468] __split_vma+0x5af/0x950 [ 28.872956] ? __pfx___split_vma+0x10/0x10 [ 28.873508] ? find_held_lock+0x2c/0x110 [ 28.874067] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.874657] ? lock_is_held_type+0x9f/0x120 [ 28.875221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.875850] ? mtree_range_walk+0x632/0x900 [ 28.876412] ? mas_walk+0x5c7/0x7c0 [ 28.876906] do_vmi_munmap+0x1f1/0x2b0 [ 28.877411] mmap_region+0x1f9/0x2660 [ 28.877956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.878522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.879274] ? __pfx_lock_acquire+0x10/0x10 [ 28.879826] ? __pfx_mmap_region+0x10/0x10 [ 28.880380] ? security_mmap_addr+0x7d/0xa0 [ 28.880923] ? get_unmapped_area+0x1f5/0x3f0 [ 28.881494] do_mmap+0x854/0xf00 [ 28.881967] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.882481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.883060] ksys_mmap_pgoff+0x3af/0x500 [ 28.883586] do_syscall_64+0x3f/0x90 [ 28.884080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884751] RIP: 0033:0x7f99700acd82 [ 28.885216] 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 [ 28.887461] RSP: 002b:00007ffcee6712e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.888417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99700acd82 [ 28.889310] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f996f4e6000 [ 28.890328] RBP: 00007f996f4e6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.891217] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc740a3f70 [ 28.892127] R13: 00007ffcee671300 R14: 00007ffcee671330 R15: 00007ffcee671690 [ 28.893020] </TASK> [ 28.893323] [ 28.893544] Allocated by task 212: [ 28.894048] kasan_save_stack+0x22/0x50 [ 28.894575] kasan_set_track+0x25/0x30 [ 28.895086] __kasan_slab_alloc+0x59/0x70 [ 28.895626] kmem_cache_alloc+0x16b/0x370 [ 28.896159] vm_area_dup+0x20/0x160 [ 28.896636] __split_vma+0x170/0x950 [ 28.897117] split_vma+0xc6/0x110 [ 28.897569] mprotect_fixup+0x8d2/0xb30 [ 28.898096] do_mprotect_pkey+0x87e/0xd40 [ 28.898637] __x64_sys_mprotect+0x78/0xc0 [ 28.899178] do_syscall_64+0x3f/0x90 [ 28.899667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900342] [ 28.900560] Freed by task 19: [ 28.900961] kasan_save_stack+0x22/0x50 [ 28.901477] kasan_set_track+0x25/0x30 [ 28.902006] kasan_save_free_info+0x2b/0x50 [ 28.902556] __kasan_slab_free+0x10a/0x190 [ 28.903118] kmem_cache_free+0x10d/0x4d0 [ 28.903655] rcu_core+0x8c8/0x2860 [ 28.904118] __do_softirq+0x1b7/0x7d4 [ 28.904609] [ 28.904835] Last potentially related work creation: [ 28.905445] kasan_save_stack+0x22/0x50 [ 28.905979] __kasan_record_aux_stack+0x8e/0xa0 [ 28.906579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.907249] remove_vma+0x139/0x170 [ 28.907714] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.908300] do_vmi_munmap+0x1f1/0x2b0 [ 28.908805] __vm_munmap+0x138/0x3a0 [ 28.909292] __x64_sys_munmap+0x59/0x80 [ 28.909813] do_syscall_64+0x3f/0x90 [ 28.910311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.911000] [ 28.911224] The buggy address belongs to the object at ffff88800e816828 [ 28.911224] which belongs to the cache vm_area_struct of size 168 [ 28.912729] The buggy address is located 88 bytes inside of [ 28.912729] freed 168-byte region [ffff88800e816828, ffff88800e8168d0) [ 28.914181] [ 28.914404] The buggy address belongs to the physical page: [ 28.915079] page:0000000031b3ff18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe816 [ 28.916194] memcg:ffff88800ee94001 [ 28.916631] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.917293] page_type: 0xffffffff() [ 28.917759] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.918701] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee94001 [ 28.919631] page dumped because: kasan: bad access detected [ 28.920307] [ 28.920525] Memory state around the buggy address: [ 28.921115] ffff88800e816780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.922009] ffff88800e816800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.922890] >ffff88800e816880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.923755] ^ [ 28.924174] ffff88800e816900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.925045] ffff88800e816980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.925927] ================================================================== [ 28.927130] Disabling lock debugging due to kernel taint [ 31.281370] BUG: Bad rss-counter state mm:000000007807d61d type:MM_FILEPAGES val:33 [ 31.282401] BUG: Bad rss-counter state mm:000000007807d61d type:MM_ANONPAGES val:22 [ 31.851665] BUG: Bad rss-counter state mm:00000000e481748d type:MM_FILEPAGES val:33 [ 31.852840] BUG: Bad rss-counter state mm:00000000e481748d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37625' (ECDSA) to the list of known hosts. 2023/06/21 06:26:16 fuzzer started 2023/06/21 06:26:16 dialing manager at localhost:36067 2023/06/21 06:26:16 checking machine... 2023/06/21 06:26:16 checking revisions... [ 32.467955] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:26:16 testing simple program... [ 32.518445] cgroup: Unknown subsys name 'net' [ 32.561338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:15 Registers: info registers vcpu 0 RAX=ffffed1001ad8ed8 RBX=1ffff11001ad8ed8 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880100b60d0 RBP=0000000000000001 RSP=ffff88800d6c76b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6d53 R12=0000000000000001 R13=0000000000000000 R14=ffff8880100b60d0 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f745be96900 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=00007f745b2935c0 CR3=000000000ee1a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=74a19df8b046840900000000000ae988 XMM05=a2f661fe5a72f46a0000000000132b10 XMM06=4fda316b135da52b0000000000131bb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888010681f80 RCX=0000000000000000 RDX=1ffff1100268ae25 RSI=ffffffff81f4d4b3 RDI=ffff88800f3ce918 RBP=ffff8880158d7c38 RSP=ffff8880158d7a58 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=0000000000000000 R12=ffff88800f3ce808 R13=ffff8880158d7c3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f4d503 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 00007fe63dae2900 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=00007fe63e09a0b0 CR3=00000000146ae000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000