syzkaller login: [ 38.861231] BUG: Bad rss-counter state mm:00000000e40ba41b type:MM_FILEPAGES val:33 [ 38.862555] BUG: Bad rss-counter state mm:00000000e40ba41b type:MM_ANONPAGES val:22 [ 38.896241] ================================================================== [ 38.897261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.898164] Read of size 8 at addr ffff88800ef18228 by task sshd/219 [ 38.898967] [ 38.899258] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.900065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.901071] Call Trace: [ 38.901343] [ 38.901568] dump_stack_lvl+0x91/0xf0 [ 38.901990] print_report+0xcc/0x620 [ 38.902579] ? __virt_addr_valid+0x102/0x340 [ 38.903080] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904354] kasan_report+0xbe/0xf0 [ 38.904809] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905389] vma_interval_tree_remove+0xc75/0xec0 [ 38.905985] vma_prepare+0xc54/0x11a0 [ 38.906444] __split_vma+0x5af/0x950 [ 38.906824] ? __pfx___split_vma+0x10/0x10 [ 38.907351] ? find_held_lock+0x2c/0x110 [ 38.907976] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.908480] ? lock_is_held_type+0x9f/0x120 [ 38.908896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.909399] ? mtree_range_walk+0x632/0x900 [ 38.909944] ? mas_walk+0x5c7/0x7c0 [ 38.910342] do_vmi_munmap+0x1f1/0x2b0 [ 38.910767] mmap_region+0x1f9/0x2660 [ 38.911251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.912241] ? __pfx_lock_acquire+0x10/0x10 [ 38.912699] ? __pfx_mmap_region+0x10/0x10 [ 38.913221] ? security_mmap_addr+0x7d/0xa0 [ 38.913695] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914124] do_mmap+0x854/0xf00 [ 38.914477] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.914969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915472] ksys_mmap_pgoff+0x3af/0x500 [ 38.915876] do_syscall_64+0x3f/0x90 [ 38.916293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916939] RIP: 0033:0x7f084d2e6d82 [ 38.917320] 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 [ 38.919161] RSP: 002b:00007fffd158a8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.919883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f084d2e6d82 [ 38.920704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f084c720000 [ 38.921374] RBP: 00007f084c720000 R08: 0000000000000009 R09: 0000000000001000 [ 38.922134] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559739159ec0 [ 38.922874] R13: 00007fffd158a910 R14: 00007fffd158a940 R15: 00007fffd158aca0 [ 38.923636] [ 38.923933] [ 38.924119] Allocated by task 212: [ 38.924450] kasan_save_stack+0x22/0x50 [ 38.924850] kasan_set_track+0x25/0x30 [ 38.925309] __kasan_slab_alloc+0x59/0x70 [ 38.925816] kmem_cache_alloc+0x16b/0x370 [ 38.926215] vm_area_dup+0x20/0x160 [ 38.926571] __split_vma+0x170/0x950 [ 38.927015] split_vma+0xc6/0x110 [ 38.927453] mprotect_fixup+0x8d2/0xb30 [ 38.927874] do_mprotect_pkey+0x87e/0xd40 [ 38.928298] __x64_sys_mprotect+0x78/0xc0 [ 38.928718] do_syscall_64+0x3f/0x90 [ 38.929134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929793] [ 38.930008] Freed by task 202: [ 38.930321] kasan_save_stack+0x22/0x50 [ 38.930718] kasan_set_track+0x25/0x30 [ 38.931098] kasan_save_free_info+0x2b/0x50 [ 38.931571] __kasan_slab_free+0x10a/0x190 [ 38.932109] kmem_cache_free+0x10d/0x4d0 [ 38.932597] rcu_core+0x8c8/0x2860 [ 38.933039] __do_softirq+0x1b7/0x7d4 [ 38.933487] [ 38.933679] Last potentially related work creation: [ 38.934134] kasan_save_stack+0x22/0x50 [ 38.934520] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935644] remove_vma+0x139/0x170 [ 38.935996] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936616] do_vmi_munmap+0x1f1/0x2b0 [ 38.937095] __vm_munmap+0x138/0x3a0 [ 38.937453] __x64_sys_munmap+0x59/0x80 [ 38.937853] do_syscall_64+0x3f/0x90 [ 38.938277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938890] [ 38.939057] Second to last potentially related work creation: [ 38.939589] kasan_save_stack+0x22/0x50 [ 38.940048] __kasan_record_aux_stack+0x8e/0xa0 [ 38.940616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.941118] remove_vma+0x139/0x170 [ 38.941475] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.942024] do_vmi_munmap+0x1f1/0x2b0 [ 38.942481] mmap_region+0x1f9/0x2660 [ 38.942853] do_mmap+0x854/0xf00 [ 38.943183] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.943616] ksys_mmap_pgoff+0x3af/0x500 [ 38.944121] do_syscall_64+0x3f/0x90 [ 38.944506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945075] [ 38.945290] The buggy address belongs to the object at ffff88800ef181d0 [ 38.945290] which belongs to the cache vm_area_struct of size 168 [ 38.946494] The buggy address is located 88 bytes inside of [ 38.946494] freed 168-byte region [ffff88800ef181d0, ffff88800ef18278) [ 38.947795] [ 38.947963] The buggy address belongs to the physical page: [ 38.948481] page:0000000016d45e9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef18 [ 38.949490] memcg:ffff888013f2b801 [ 38.949861] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.950359] page_type: 0xffffffff() [ 38.950782] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375d80 dead000000000004 [ 38.951643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f2b801 [ 38.952359] page dumped because: kasan: bad access detected [ 38.952960] [ 38.953172] Memory state around the buggy address: [ 38.953691] ffff88800ef18100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.954447] ffff88800ef18180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.955188] >ffff88800ef18200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.955842] ^ [ 38.956415] ffff88800ef18280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.957146] ffff88800ef18300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.957807] ================================================================== [ 38.958897] Disabling lock debugging due to kernel taint [ 40.536701] BUG: Bad rss-counter state mm:00000000c4e6f91f type:MM_FILEPAGES val:33 [ 40.537788] BUG: Bad rss-counter state mm:00000000c4e6f91f type:MM_ANONPAGES val:22 [ 40.973577] BUG: Bad rss-counter state mm:00000000770cd72c type:MM_FILEPAGES val:33 [ 40.974568] BUG: Bad rss-counter state mm:00000000770cd72c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60026' (ECDSA) to the list of known hosts. 2023/06/21 06:52:27 fuzzer started 2023/06/21 06:52:28 dialing manager at localhost:36067 2023/06/21 06:52:28 checking machine... 2023/06/21 06:52:28 checking revisions... [ 41.714136] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:52:28 testing simple program... [ 41.767906] cgroup: Unknown subsys name 'net' [ 41.811538] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:52:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=ffffffff86607dd4 RSP=ffff88806ce09a48 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff86607000 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801bcccc60 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 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=00007ffcc3e20848 CR3=0000000005482000 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=00007fd1537fd510000055c48f2de790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fd54120 RCX=ffff88800fd54120 RDX=00000000802a0027 RSI=ffff88800fd54120 RDI=ffff8880087a03c0 RBP=ffff8880158cfc08 RSP=ffff8880158cfb70 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea00003f5500 R11=00000000802a0027 R12=ffffea00003f5500 R13=ffff88800fd540c0 R14=00000000802a0026 R15=ffff8880087a03c0 RIP=ffffffff81809652 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fec80f6a900 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=00007fec815220b0 CR3=000000000c9b2000 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