syzkaller login: [ 46.815465] BUG: Bad rss-counter state mm:0000000028925a52 type:MM_FILEPAGES val:33 [ 46.816244] BUG: Bad rss-counter state mm:0000000028925a52 type:MM_ANONPAGES val:22 [ 46.953989] ================================================================== [ 46.954661] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.955347] Read of size 8 at addr ffff88800f2d4df0 by task sshd/219 [ 46.955923] [ 46.956079] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.956714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.957443] Call Trace: [ 46.957762] [ 46.957985] dump_stack_lvl+0x91/0xf0 [ 46.958522] print_report+0xcc/0x620 [ 46.958870] ? __virt_addr_valid+0x102/0x340 [ 46.959285] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.959760] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.960223] kasan_report+0xbe/0xf0 [ 46.960605] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.961054] vma_interval_tree_remove+0xc75/0xec0 [ 46.961496] vma_prepare+0xc54/0x11a0 [ 46.961886] __split_vma+0x5af/0x950 [ 46.962247] ? __pfx___split_vma+0x10/0x10 [ 46.962653] ? find_held_lock+0x2c/0x110 [ 46.963032] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.963458] ? lock_is_held_type+0x9f/0x120 [ 46.963862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.964304] ? mtree_range_walk+0x632/0x900 [ 46.964705] ? mas_walk+0x5c7/0x7c0 [ 46.965047] do_vmi_munmap+0x1f1/0x2b0 [ 46.965406] mmap_region+0x1f9/0x2660 [ 46.965777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.966137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.966644] ? __pfx_lock_acquire+0x10/0x10 [ 46.967026] ? __pfx_mmap_region+0x10/0x10 [ 46.967401] ? security_mmap_addr+0x7d/0xa0 [ 46.967791] ? get_unmapped_area+0x1f5/0x3f0 [ 46.968181] do_mmap+0x854/0xf00 [ 46.968491] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.968850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.969255] ksys_mmap_pgoff+0x3af/0x500 [ 46.969622] do_syscall_64+0x3f/0x90 [ 46.970013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.970459] RIP: 0033:0x7f6b41e70d82 [ 46.970768] 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 [ 46.972252] RSP: 002b:00007ffc481be168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.972902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b41e70d82 [ 46.973510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b412aa000 [ 46.974133] RBP: 00007f6b412aa000 R08: 0000000000000009 R09: 0000000000001000 [ 46.974718] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b834d8aec0 [ 46.975268] R13: 00007ffc481be180 R14: 00007ffc481be1b0 R15: 00007ffc481be510 [ 46.975874] [ 46.976074] [ 46.976231] Allocated by task 212: [ 46.976528] kasan_save_stack+0x22/0x50 [ 46.976891] kasan_set_track+0x25/0x30 [ 46.977227] __kasan_slab_alloc+0x59/0x70 [ 46.977594] kmem_cache_alloc+0x16b/0x370 [ 46.977983] vm_area_dup+0x20/0x160 [ 46.978298] __split_vma+0x170/0x950 [ 46.978638] split_vma+0xc6/0x110 [ 46.978948] mprotect_fixup+0x8d2/0xb30 [ 46.979310] do_mprotect_pkey+0x87e/0xd40 [ 46.979677] __x64_sys_mprotect+0x78/0xc0 [ 46.980036] do_syscall_64+0x3f/0x90 [ 46.980358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.980796] [ 46.980947] Freed by task 212: [ 46.981221] kasan_save_stack+0x22/0x50 [ 46.981555] kasan_set_track+0x25/0x30 [ 46.981926] kasan_save_free_info+0x2b/0x50 [ 46.982288] __kasan_slab_free+0x10a/0x190 [ 46.982660] kmem_cache_free+0x10d/0x4d0 [ 46.983000] rcu_core+0x8c8/0x2860 [ 46.983321] __do_softirq+0x1b7/0x7d4 [ 46.983650] [ 46.983806] Last potentially related work creation: [ 46.984212] kasan_save_stack+0x22/0x50 [ 46.984573] __kasan_record_aux_stack+0x8e/0xa0 [ 46.984979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.985433] remove_vma+0x139/0x170 [ 46.985800] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.986190] do_vmi_munmap+0x1f1/0x2b0 [ 46.986517] __vm_munmap+0x138/0x3a0 [ 46.986838] __x64_sys_munmap+0x59/0x80 [ 46.987184] do_syscall_64+0x3f/0x90 [ 46.987504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.987955] [ 46.988096] The buggy address belongs to the object at ffff88800f2d4d98 [ 46.988096] which belongs to the cache vm_area_struct of size 168 [ 46.989102] The buggy address is located 88 bytes inside of [ 46.989102] freed 168-byte region [ffff88800f2d4d98, ffff88800f2d4e40) [ 46.990078] [ 46.990230] The buggy address belongs to the physical page: [ 46.990701] page:0000000035548ecf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2d4 [ 46.991467] memcg:ffff88800ce50601 [ 46.991767] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.992251] page_type: 0xffffffff() [ 46.992562] raw: 0100000000000200 ffff88800879fc80 ffffea000037acc0 dead000000000005 [ 46.993177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce50601 [ 46.993861] page dumped because: kasan: bad access detected [ 46.994321] [ 46.994462] Memory state around the buggy address: [ 46.994845] ffff88800f2d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 46.995438] ffff88800f2d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 46.996028] >ffff88800f2d4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 46.996579] ^ [ 46.997149] ffff88800f2d4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 46.997782] ffff88800f2d4e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.998367] ================================================================== [ 46.999108] Disabling lock debugging due to kernel taint [ 48.640584] BUG: Bad rss-counter state mm:00000000c18963d7 type:MM_FILEPAGES val:33 [ 48.641343] BUG: Bad rss-counter state mm:00000000c18963d7 type:MM_ANONPAGES val:22 [ 49.028764] BUG: Bad rss-counter state mm:000000007a9f2200 type:MM_FILEPAGES val:33 [ 49.029473] BUG: Bad rss-counter state mm:000000007a9f2200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55072' (ECDSA) to the list of known hosts. 2023/06/20 09:18:19 fuzzer started 2023/06/20 09:18:20 dialing manager at localhost:44161 2023/06/20 09:18:20 checking machine... 2023/06/20 09:18:20 checking revisions... [ 49.603149] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:18:20 testing simple program... [ 49.637260] cgroup: Unknown subsys name 'net' [ 49.677017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc4cb75ec50 CR3=0000000014208000 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=7c3a36b1a3d8ad986a4571b2f8549e49 XMM02=2c67c8bc2e329bc3000000000011eb28 XMM03=fb795ef6d65770560000000000124d50 XMM04=dddeafec3639e22d00000000000ae988 XMM05=dfcdbad4f1609c370000000000134598 XMM06=9b9246f0b9a381130000000000133770 XMM07=e042d86d42eb936e0000000000125028 XMM08=803c818440185fa6000000000011eb88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11002c77e85 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880163bf418 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000fb000000fb0 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007f340fa6d900 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=00007ffec4f67000 CR3=000000000e53e000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000