syzkaller login: [ 30.679357] BUG: Bad rss-counter state mm:00000000c44dd819 type:MM_FILEPAGES val:33 [ 30.680576] BUG: Bad rss-counter state mm:00000000c44dd819 type:MM_ANONPAGES val:22 [ 30.827506] ================================================================== [ 30.828446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.829402] Read of size 8 at addr ffff88800ff42b38 by task sshd/221 [ 30.830167] [ 30.830380] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.831367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.832366] Call Trace: [ 30.832684] [ 30.832982] dump_stack_lvl+0x91/0xf0 [ 30.833493] print_report+0xcc/0x620 [ 30.833985] ? __virt_addr_valid+0x102/0x340 [ 30.834535] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835775] kasan_report+0xbe/0xf0 [ 30.836260] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836899] vma_interval_tree_remove+0xc75/0xec0 [ 30.837495] vma_prepare+0xc54/0x11a0 [ 30.837980] __split_vma+0x5af/0x950 [ 30.838450] ? __pfx___split_vma+0x10/0x10 [ 30.838969] ? find_held_lock+0x2c/0x110 [ 30.839486] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.840044] ? lock_is_held_type+0x9f/0x120 [ 30.840579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.841188] ? mtree_range_walk+0x632/0x900 [ 30.841736] ? mas_walk+0x5c7/0x7c0 [ 30.842218] do_vmi_munmap+0x1f1/0x2b0 [ 30.842705] mmap_region+0x1f9/0x2660 [ 30.843190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.843704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.844411] ? __pfx_lock_acquire+0x10/0x10 [ 30.844951] ? __pfx_mmap_region+0x10/0x10 [ 30.845476] ? security_mmap_addr+0x7d/0xa0 [ 30.846002] ? get_unmapped_area+0x1f5/0x3f0 [ 30.846548] do_mmap+0x854/0xf00 [ 30.846982] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.847484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.848041] ksys_mmap_pgoff+0x3af/0x500 [ 30.848542] do_syscall_64+0x3f/0x90 [ 30.849049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849699] RIP: 0033:0x7f5153f8bd82 [ 30.850155] 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 [ 30.852288] RSP: 002b:00007fff4beb61a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.853203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5153f8bd82 [ 30.854046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51533c5000 [ 30.854890] RBP: 00007f51533c5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855731] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f88126f70 [ 30.856573] R13: 00007fff4beb61c0 R14: 00007fff4beb61f0 R15: 00007fff4beb6550 [ 30.857450] [ 30.857742] [ 30.857956] Allocated by task 214: [ 30.858386] kasan_save_stack+0x22/0x50 [ 30.858884] kasan_set_track+0x25/0x30 [ 30.859385] __kasan_slab_alloc+0x59/0x70 [ 30.859908] kmem_cache_alloc+0x16b/0x370 [ 30.860420] vm_area_dup+0x20/0x160 [ 30.860875] __split_vma+0x170/0x950 [ 30.861336] split_vma+0xc6/0x110 [ 30.861771] mprotect_fixup+0x8d2/0xb30 [ 30.862271] do_mprotect_pkey+0x87e/0xd40 [ 30.862833] __x64_sys_mprotect+0x78/0xc0 [ 30.863366] do_syscall_64+0x3f/0x90 [ 30.863842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864493] [ 30.864714] Freed by task 214: [ 30.865113] kasan_save_stack+0x22/0x50 [ 30.865612] kasan_set_track+0x25/0x30 [ 30.866099] kasan_save_free_info+0x2b/0x50 [ 30.866627] __kasan_slab_free+0x10a/0x190 [ 30.867164] kmem_cache_free+0x10d/0x4d0 [ 30.867670] rcu_core+0x8c8/0x2860 [ 30.868107] __do_softirq+0x1b7/0x7d4 [ 30.868579] [ 30.868808] Last potentially related work creation: [ 30.869389] kasan_save_stack+0x22/0x50 [ 30.869901] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.871112] remove_vma+0x139/0x170 [ 30.871563] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872125] do_vmi_munmap+0x1f1/0x2b0 [ 30.872602] __vm_munmap+0x138/0x3a0 [ 30.873075] __x64_sys_munmap+0x59/0x80 [ 30.873571] do_syscall_64+0x3f/0x90 [ 30.874038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874678] [ 30.874890] The buggy address belongs to the object at ffff88800ff42ae0 [ 30.874890] which belongs to the cache vm_area_struct of size 168 [ 30.876347] The buggy address is located 88 bytes inside of [ 30.876347] freed 168-byte region [ffff88800ff42ae0, ffff88800ff42b88) [ 30.877749] [ 30.877964] The buggy address belongs to the physical page: [ 30.878610] page:0000000075c9cca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff42 [ 30.879684] memcg:ffff88800ff44a01 [ 30.880102] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880739] page_type: 0xffffffff() [ 30.881209] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff44a01 [ 30.883016] page dumped because: kasan: bad access detected [ 30.883667] [ 30.883882] Memory state around the buggy address: [ 30.884464] ffff88800ff42a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.885323] ffff88800ff42a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.886170] >ffff88800ff42b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887022] ^ [ 30.887629] ffff88800ff42b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.888480] ffff88800ff42c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.889343] ================================================================== [ 30.890256] Disabling lock debugging due to kernel taint [ 32.996728] BUG: Bad rss-counter state mm:000000003a01fa76 type:MM_FILEPAGES val:33 [ 32.997965] BUG: Bad rss-counter state mm:000000003a01fa76 type:MM_ANONPAGES val:22 [ 33.410552] BUG: Bad rss-counter state mm:00000000191f4556 type:MM_FILEPAGES val:33 [ 33.411713] BUG: Bad rss-counter state mm:00000000191f4556 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12655' (ECDSA) to the list of known hosts. 2023/06/20 13:07:43 fuzzer started 2023/06/20 13:07:44 dialing manager at localhost:36067 2023/06/20 13:07:44 checking machine... 2023/06/20 13:07:44 checking revisions... [ 34.143964] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:07:44 testing simple program... [ 34.202211] cgroup: Unknown subsys name 'net' [ 34.240853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:07:43 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85da0748 RCX=ffffffff811fbebd RDX=0000000000000000 RSI=ffffffff860ac906 RDI=ffffffff85da0718 RBP=ffffffff85da0748 RSP=ffff888018ce79e8 R8 =ffffffff860ac906 R9 =ffff888018ce7ae0 R10=0000000000038001 R11=0000000000009755 R12=ffffffff85da0748 R13=ffffffff85da0718 R14=ffffffff85da0744 R15=dffffc0000000000 RIP=ffffffff8112fc90 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 00007f87aa0be900 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=00007ffcd2c2b248 CR3=000000000e7a8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86148ed5 RBX=0000000000000001 RCX=ffffffff86148ed0 RDX=0000000000000000 RSI=1ffffffff0c291da RDI=ffffffff85e08af4 RBP=ffff88806cf09ac0 RSP=ffff88806cf099f8 R8 =ffffffff86148ed0 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=000000000002384c R12=ffff88806cf09ac8 R13=ffff88806cf09ab0 R14=ffff88806cf09aa9 R15=ffff88806cf09a68 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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 00007fb28d684900 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=0000561415e64310 CR3=000000000cb16000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=763b96339d86902700000000000ae988 XMM05=dcd3af4f1598fa790000000000132f40 XMM06=c291bd5c70af25b90000000000131fe0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000