syzkaller login: [ 61.748960] BUG: Bad rss-counter state mm:0000000042ed71e0 type:MM_FILEPAGES val:33 [ 61.750321] BUG: Bad rss-counter state mm:0000000042ed71e0 type:MM_ANONPAGES val:22 [ 61.911540] ================================================================== [ 61.912681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.913738] Read of size 8 at addr ffff88800f8ddd08 by task sshd/227 [ 61.914528] [ 61.914839] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.915722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.916705] Call Trace: [ 61.917029] [ 61.917313] dump_stack_lvl+0x91/0xf0 [ 61.917807] print_report+0xcc/0x620 [ 61.918285] ? __virt_addr_valid+0x102/0x340 [ 61.918835] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.919461] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.920112] kasan_report+0xbe/0xf0 [ 61.920611] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.921240] vma_interval_tree_remove+0xc75/0xec0 [ 61.921847] vma_prepare+0xc54/0x11a0 [ 61.922328] __split_vma+0x5af/0x950 [ 61.922802] ? __pfx___split_vma+0x10/0x10 [ 61.923339] ? find_held_lock+0x2c/0x110 [ 61.923865] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.924465] ? lock_is_held_type+0x9f/0x120 [ 61.925017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.925633] ? mtree_range_walk+0x632/0x900 [ 61.926188] ? mas_walk+0x5c7/0x7c0 [ 61.926674] do_vmi_munmap+0x1f1/0x2b0 [ 61.927167] mmap_region+0x1f9/0x2660 [ 61.927651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.928167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.928896] ? __pfx_lock_acquire+0x10/0x10 [ 61.929436] ? __pfx_mmap_region+0x10/0x10 [ 61.929971] ? security_mmap_addr+0x7d/0xa0 [ 61.930503] ? get_unmapped_area+0x1f5/0x3f0 [ 61.931067] do_mmap+0x854/0xf00 [ 61.931509] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.932006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.932577] ksys_mmap_pgoff+0x3af/0x500 [ 61.933089] do_syscall_64+0x3f/0x90 [ 61.933594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.934262] RIP: 0033:0x7f0f1f9d0d82 [ 61.934719] 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 [ 61.936877] RSP: 002b:00007ffcd0556278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.937776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f1f9d0d82 [ 61.938625] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f1ee0a000 [ 61.939473] RBP: 00007f0f1ee0a000 R08: 0000000000000009 R09: 0000000000001000 [ 61.940325] R10: 0000000000000812 R11: 0000000000000206 R12: 000055607899e980 [ 61.941185] R13: 00007ffcd0556290 R14: 00007ffcd05562c0 R15: 00007ffcd0556620 [ 61.942048] [ 61.942346] [ 61.942562] Allocated by task 220: [ 61.942994] kasan_save_stack+0x22/0x50 [ 61.943499] kasan_set_track+0x25/0x30 [ 61.944004] __kasan_slab_alloc+0x59/0x70 [ 61.944540] kmem_cache_alloc+0x16b/0x370 [ 61.945059] vm_area_dup+0x20/0x160 [ 61.945518] __split_vma+0x170/0x950 [ 61.945988] split_vma+0xc6/0x110 [ 61.946435] mprotect_fixup+0x8d2/0xb30 [ 61.946948] do_mprotect_pkey+0x87e/0xd40 [ 61.947470] __x64_sys_mprotect+0x78/0xc0 [ 61.947996] do_syscall_64+0x3f/0x90 [ 61.948499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.949154] [ 61.949372] Freed by task 220: [ 61.949772] kasan_save_stack+0x22/0x50 [ 61.950279] kasan_set_track+0x25/0x30 [ 61.950777] kasan_save_free_info+0x2b/0x50 [ 61.951318] __kasan_slab_free+0x10a/0x190 [ 61.951850] kmem_cache_free+0x10d/0x4d0 [ 61.952371] rcu_core+0x8c8/0x2860 [ 61.952824] __do_softirq+0x1b7/0x7d4 [ 61.953319] [ 61.953552] Last potentially related work creation: [ 61.954155] kasan_save_stack+0x22/0x50 [ 61.954668] __kasan_record_aux_stack+0x8e/0xa0 [ 61.955259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.955904] remove_vma+0x139/0x170 [ 61.956383] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.956949] do_vmi_munmap+0x1f1/0x2b0 [ 61.957443] __vm_munmap+0x138/0x3a0 [ 61.957914] __x64_sys_munmap+0x59/0x80 [ 61.958413] do_syscall_64+0x3f/0x90 [ 61.958894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.959534] [ 61.959753] The buggy address belongs to the object at ffff88800f8ddcb0 [ 61.959753] which belongs to the cache vm_area_struct of size 168 [ 61.961261] The buggy address is located 88 bytes inside of [ 61.961261] freed 168-byte region [ffff88800f8ddcb0, ffff88800f8ddd58) [ 61.962693] [ 61.962915] The buggy address belongs to the physical page: [ 61.963571] page:0000000020b53487 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8dd [ 61.964658] memcg:ffff88800e7ce901 [ 61.965091] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.965746] page_type: 0xffffffff() [ 61.966200] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.967120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ce901 [ 61.968028] page dumped because: kasan: bad access detected [ 61.968723] [ 61.968951] Memory state around the buggy address: [ 61.969561] ffff88800f8ddc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 61.970451] ffff88800f8ddc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.971312] >ffff88800f8ddd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.972202] ^ [ 61.972659] ffff88800f8ddd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.973523] ffff88800f8dde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.974421] ================================================================== [ 61.975400] Disabling lock debugging due to kernel taint [ 63.801336] BUG: Bad rss-counter state mm:000000003b2bf96e type:MM_FILEPAGES val:33 [ 63.802123] BUG: Bad rss-counter state mm:000000003b2bf96e type:MM_ANONPAGES val:22 [ 64.232752] BUG: Bad rss-counter state mm:00000000a3f7f452 type:MM_FILEPAGES val:33 [ 64.233830] BUG: Bad rss-counter state mm:00000000a3f7f452 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1231' (ECDSA) to the list of known hosts. 2023/06/20 16:02:51 fuzzer started 2023/06/20 16:02:51 dialing manager at localhost:36067 2023/06/20 16:02:51 checking machine... 2023/06/20 16:02:51 checking revisions... [ 64.824973] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:02:51 testing simple program... [ 64.880278] cgroup: Unknown subsys name 'net' [ 64.930490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd780ea328 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=00007efd2f2d6510000056290a920790 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=1ffffffff0bc179d RBX=ffffffff85e0bce8 RCX=ffffffff818d9891 RDX=0000000000000000 RSI=ffffffff8614d9ac RDI=ffffffff85e0bcdc RBP=ffffffff85e0bcdc RSP=ffff8880094778c0 R8 =ffffffff8614d9ac R9 =ffff8880094779b8 R10=0000000000038001 R11=00000000000244c6 R12=ffffffff85e0bcf8 R13=ffffffff85e0bcdc R14=ffffffff85e0bcdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f9fc86ed900 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=00007ffea1e0c000 CR3=00000000102c0000 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=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