syzkaller login: [ 38.741417] BUG: Bad rss-counter state mm:00000000dd84dfdb type:MM_FILEPAGES val:33 [ 38.742895] BUG: Bad rss-counter state mm:00000000dd84dfdb type:MM_ANONPAGES val:22 [ 38.928937] ================================================================== [ 38.930026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.931180] Read of size 8 at addr ffff88800e0265c8 by task sshd/219 [ 38.932291] [ 38.932524] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.933441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.934490] Call Trace: [ 38.934831] [ 38.935140] dump_stack_lvl+0x91/0xf0 [ 38.935665] print_report+0xcc/0x620 [ 38.936182] ? __virt_addr_valid+0x102/0x340 [ 38.936769] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.937430] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938084] kasan_report+0xbe/0xf0 [ 38.938601] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939299] vma_interval_tree_remove+0xc75/0xec0 [ 38.939964] vma_prepare+0xc54/0x11a0 [ 38.940497] __split_vma+0x5af/0x950 [ 38.941018] ? __pfx___split_vma+0x10/0x10 [ 38.941607] ? find_held_lock+0x2c/0x110 [ 38.942186] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.942812] ? lock_is_held_type+0x9f/0x120 [ 38.943426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.944088] ? mtree_range_walk+0x632/0x900 [ 38.944702] ? mas_walk+0x5c7/0x7c0 [ 38.945228] do_vmi_munmap+0x1f1/0x2b0 [ 38.945766] mmap_region+0x1f9/0x2660 [ 38.946295] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.946862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.947659] ? __pfx_lock_acquire+0x10/0x10 [ 38.948246] ? __pfx_mmap_region+0x10/0x10 [ 38.948830] ? security_mmap_addr+0x7d/0xa0 [ 38.949413] ? get_unmapped_area+0x1f5/0x3f0 [ 38.950025] do_mmap+0x854/0xf00 [ 38.950507] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.951059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.951683] ksys_mmap_pgoff+0x3af/0x500 [ 38.952249] do_syscall_64+0x3f/0x90 [ 38.952781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953501] RIP: 0033:0x7fa97b6b3d82 [ 38.954005] 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 [ 38.956349] RSP: 002b:00007ffde72a32e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.957315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa97b6b3d82 [ 38.958222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa97aaed000 [ 38.959141] RBP: 00007fa97aaed000 R08: 0000000000000009 R09: 0000000000001000 [ 38.960045] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6dcd51ec0 [ 38.960975] R13: 00007ffde72a3300 R14: 00007ffde72a3330 R15: 00007ffde72a3690 [ 38.961921] [ 38.962244] [ 38.962480] Allocated by task 212: [ 38.962945] kasan_save_stack+0x22/0x50 [ 38.963497] kasan_set_track+0x25/0x30 [ 38.964036] __kasan_slab_alloc+0x59/0x70 [ 38.964613] kmem_cache_alloc+0x16b/0x370 [ 38.965184] vm_area_dup+0x20/0x160 [ 38.965691] __split_vma+0x170/0x950 [ 38.966206] split_vma+0xc6/0x110 [ 38.966689] mprotect_fixup+0x8d2/0xb30 [ 38.967256] do_mprotect_pkey+0x87e/0xd40 [ 38.967832] __x64_sys_mprotect+0x78/0xc0 [ 38.968424] do_syscall_64+0x3f/0x90 [ 38.968948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969663] [ 38.969894] Freed by task 212: [ 38.970328] kasan_save_stack+0x22/0x50 [ 38.970887] kasan_set_track+0x25/0x30 [ 38.971434] kasan_save_free_info+0x2b/0x50 [ 38.972019] __kasan_slab_free+0x10a/0x190 [ 38.972658] kmem_cache_free+0x10d/0x4d0 [ 38.973234] rcu_core+0x8c8/0x2860 [ 38.973724] __do_softirq+0x1b7/0x7d4 [ 38.974254] [ 38.974494] Last potentially related work creation: [ 38.975156] kasan_save_stack+0x22/0x50 [ 38.975709] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977044] remove_vma+0x139/0x170 [ 38.977543] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978158] do_vmi_munmap+0x1f1/0x2b0 [ 38.978697] __vm_munmap+0x138/0x3a0 [ 38.979213] __x64_sys_munmap+0x59/0x80 [ 38.979757] do_syscall_64+0x3f/0x90 [ 38.980280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980993] [ 38.981228] Second to last potentially related work creation: [ 38.981979] kasan_save_stack+0x22/0x50 [ 38.982527] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.983872] remove_vma+0x139/0x170 [ 38.984369] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984988] do_vmi_munmap+0x1f1/0x2b0 [ 38.985524] mmap_region+0x1f9/0x2660 [ 38.986052] do_mmap+0x854/0xf00 [ 38.986529] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.987087] ksys_mmap_pgoff+0x3af/0x500 [ 38.987637] do_syscall_64+0x3f/0x90 [ 38.988161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.988873] [ 38.989111] The buggy address belongs to the object at ffff88800e026570 [ 38.989111] which belongs to the cache vm_area_struct of size 168 [ 38.990727] The buggy address is located 88 bytes inside of [ 38.990727] freed 168-byte region [ffff88800e026570, ffff88800e026618) [ 38.992274] [ 38.992511] The buggy address belongs to the physical page: [ 38.993247] page:00000000e26ee50d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe026 [ 38.994439] memcg:ffff88800eefd701 [ 38.994903] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.995636] page_type: 0xffffffff() [ 38.996134] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380bc0 dead000000000006 [ 38.997145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eefd701 [ 38.998147] page dumped because: kasan: bad access detected [ 38.998874] [ 38.999113] Memory state around the buggy address: [ 38.999746] ffff88800e026480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.000692] ffff88800e026500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.001636] >ffff88800e026580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.002578] ^ [ 39.003318] ffff88800e026600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.004259] ffff88800e026680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.005198] ================================================================== [ 39.006237] Disabling lock debugging due to kernel taint [ 41.571986] BUG: Bad rss-counter state mm:00000000b7d81426 type:MM_FILEPAGES val:33 [ 41.573563] BUG: Bad rss-counter state mm:00000000b7d81426 type:MM_ANONPAGES val:22 [ 42.178814] BUG: Bad rss-counter state mm:00000000a815fb66 type:MM_FILEPAGES val:33 [ 42.180385] BUG: Bad rss-counter state mm:00000000a815fb66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28054' (ECDSA) to the list of known hosts. 2023/06/20 19:27:45 fuzzer started 2023/06/20 19:27:45 dialing manager at localhost:36067 2023/06/20 19:27:45 checking machine... 2023/06/20 19:27:45 checking revisions... [ 42.811569] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:27:46 testing simple program... [ 42.865432] cgroup: Unknown subsys name 'net' [ 42.906921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:45 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018237a88 RSI=ffffffff8363b743 RDI=ffff888018237a40 RBP=ffff888018237a98 RSP=ffff8880182379d0 R8 =0000000000000001 R9 =ffff888018237a80 R10=0000000000038001 R11=000000000008a966 R12=ffff888018237b08 R13=ffff888018237a88 R14=ffff88801966b680 R15=ffff888018237a40 RIP=ffffffff81130641 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 00007f8496652900 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=00007f8496c07650 CR3=0000000018090000 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=00007fe79b6caeb0 CR3=000000000f11c000 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=0c027671c1e3dea66b4242db3148be40 XMM02=ec2efd57dc4c00df000000000011caf8 XMM03=02174fe9de3133bf000000000011cbc8 XMM04=9fbf7451e64e7aa100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134720 XMM06=c291bd5c70af25b900000000001345a8 XMM07=e042d86d42eb936e0000000000123048 XMM08=02174fe9de3133bf000000000011cbc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000