syzkaller login: [ 28.703899] BUG: Bad rss-counter state mm:0000000012464daa type:MM_FILEPAGES val:33 [ 28.705383] BUG: Bad rss-counter state mm:0000000012464daa type:MM_ANONPAGES val:22 [ 28.861820] ================================================================== [ 28.862908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.864097] Read of size 8 at addr ffff88800dfe9228 by task sshd/220 [ 28.864965] [ 28.865187] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.866053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.867080] Call Trace: [ 28.867400] [ 28.867691] dump_stack_lvl+0x91/0xf0 [ 28.868193] print_report+0xcc/0x620 [ 28.868677] ? __virt_addr_valid+0x102/0x340 [ 28.869235] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.869865] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870499] kasan_report+0xbe/0xf0 [ 28.870984] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871610] vma_interval_tree_remove+0xc75/0xec0 [ 28.872213] vma_prepare+0xc54/0x11a0 [ 28.872693] __split_vma+0x5af/0x950 [ 28.873167] ? __pfx___split_vma+0x10/0x10 [ 28.873700] ? find_held_lock+0x2c/0x110 [ 28.874229] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.874819] ? lock_is_held_type+0x9f/0x120 [ 28.875365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.875973] ? mtree_range_walk+0x632/0x900 [ 28.876526] ? mas_walk+0x5c7/0x7c0 [ 28.877004] do_vmi_munmap+0x1f1/0x2b0 [ 28.877496] mmap_region+0x1f9/0x2660 [ 28.877978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.878492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.879230] ? __pfx_lock_acquire+0x10/0x10 [ 28.879758] ? __pfx_mmap_region+0x10/0x10 [ 28.880284] ? security_mmap_addr+0x7d/0xa0 [ 28.880820] ? get_unmapped_area+0x1f5/0x3f0 [ 28.881392] do_mmap+0x854/0xf00 [ 28.881829] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.882320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.882888] ksys_mmap_pgoff+0x3af/0x500 [ 28.883398] do_syscall_64+0x3f/0x90 [ 28.883889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884545] RIP: 0033:0x7f121069ed82 [ 28.885007] 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 [ 28.887172] RSP: 002b:00007ffccf76d0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.888079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f121069ed82 [ 28.888912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f120fad8000 [ 28.889750] RBP: 00007f120fad8000 R08: 0000000000000009 R09: 0000000000001000 [ 28.890611] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d59b129980 [ 28.891456] R13: 00007ffccf76d0c0 R14: 00007ffccf76d0f0 R15: 00007ffccf76d450 [ 28.892315] [ 28.892620] [ 28.892837] Allocated by task 213: [ 28.893269] kasan_save_stack+0x22/0x50 [ 28.893774] kasan_set_track+0x25/0x30 [ 28.894263] __kasan_slab_alloc+0x59/0x70 [ 28.894805] kmem_cache_alloc+0x16b/0x370 [ 28.895321] vm_area_dup+0x20/0x160 [ 28.895798] __split_vma+0x170/0x950 [ 28.896296] split_vma+0xc6/0x110 [ 28.896735] mprotect_fixup+0x8d2/0xb30 [ 28.897239] do_mprotect_pkey+0x87e/0xd40 [ 28.897764] __x64_sys_mprotect+0x78/0xc0 [ 28.898285] do_syscall_64+0x3f/0x90 [ 28.898778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.899421] [ 28.899636] Freed by task 213: [ 28.900034] kasan_save_stack+0x22/0x50 [ 28.900534] kasan_set_track+0x25/0x30 [ 28.901027] kasan_save_free_info+0x2b/0x50 [ 28.901567] __kasan_slab_free+0x10a/0x190 [ 28.902099] kmem_cache_free+0x10d/0x4d0 [ 28.902624] rcu_core+0x8c8/0x2860 [ 28.903076] __do_softirq+0x1b7/0x7d4 [ 28.903562] [ 28.903782] Last potentially related work creation: [ 28.904376] kasan_save_stack+0x22/0x50 [ 28.904877] __kasan_record_aux_stack+0x8e/0xa0 [ 28.905525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.906173] remove_vma+0x139/0x170 [ 28.906637] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.907194] do_vmi_munmap+0x1f1/0x2b0 [ 28.907680] __vm_munmap+0x138/0x3a0 [ 28.908147] __x64_sys_munmap+0x59/0x80 [ 28.908654] do_syscall_64+0x3f/0x90 [ 28.909127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.909768] [ 28.909985] Second to last potentially related work creation: [ 28.910691] kasan_save_stack+0x22/0x50 [ 28.911192] __kasan_record_aux_stack+0x8e/0xa0 [ 28.911763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.912398] remove_vma+0x139/0x170 [ 28.912856] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.913410] do_vmi_munmap+0x1f1/0x2b0 [ 28.913897] mmap_region+0x1f9/0x2660 [ 28.914378] do_mmap+0x854/0xf00 [ 28.914834] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.915326] ksys_mmap_pgoff+0x3af/0x500 [ 28.915831] do_syscall_64+0x3f/0x90 [ 28.916308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916956] [ 28.917173] The buggy address belongs to the object at ffff88800dfe91d0 [ 28.917173] which belongs to the cache vm_area_struct of size 168 [ 28.918663] The buggy address is located 88 bytes inside of [ 28.918663] freed 168-byte region [ffff88800dfe91d0, ffff88800dfe9278) [ 28.920069] [ 28.920284] The buggy address belongs to the physical page: [ 28.920945] page:00000000c164f25b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe9 [ 28.922025] memcg:ffff88800da68901 [ 28.922472] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.923117] page_type: 0xffffffff() [ 28.923565] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bd980 dead000000000002 [ 28.924479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da68901 [ 28.925416] page dumped because: kasan: bad access detected [ 28.926110] [ 28.926329] Memory state around the buggy address: [ 28.926960] ffff88800dfe9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.927841] ffff88800dfe9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.928729] >ffff88800dfe9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.929584] ^ [ 28.930131] ffff88800dfe9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.931025] ffff88800dfe9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.931886] ================================================================== [ 28.932798] Disabling lock debugging due to kernel taint [ 30.845792] BUG: Bad rss-counter state mm:000000000dc7e7d5 type:MM_FILEPAGES val:33 [ 30.846973] BUG: Bad rss-counter state mm:000000000dc7e7d5 type:MM_ANONPAGES val:22 [ 31.226620] BUG: Bad rss-counter state mm:00000000a689ca38 type:MM_FILEPAGES val:33 [ 31.228409] BUG: Bad rss-counter state mm:00000000a689ca38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13081' (ECDSA) to the list of known hosts. 2023/06/21 03:51:53 fuzzer started 2023/06/21 03:51:53 dialing manager at localhost:36067 2023/06/21 03:51:53 checking machine... 2023/06/21 03:51:53 checking revisions... [ 31.971736] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:51:54 testing simple program... [ 32.023368] cgroup: Unknown subsys name 'net' [ 32.066864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:51:53 Registers: info registers vcpu 0 RAX=ffffffff8613f6a7 RBX=0000000000000001 RCX=ffffffff8613f6a2 RDX=0000000000000000 RSI=1ffffffff0c27ed4 RDI=ffffffff85e02564 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613f678 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007ff949607900 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=00007ffca6a98000 CR3=0000000018064000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fcddf3e0db0 CR3=000000000e21c000 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=26ae8ac8e65d81b47641bde18ef475c8 XMM02=2c67c8bc2e329bc3000000000011d8c8 XMM03=fb795ef6d65770560000000000121f28 XMM04=43a67a0c0455d33200000000000ae988 XMM05=19e9129bd510f2350000000000133110 XMM06=4fda316b135da52b0000000000132f98 XMM07=e042d86d42eb936e00000000001221a8 XMM08=d17555c87ac91cd1000000000011d928 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000