syzkaller login: [ 31.300755] BUG: Bad rss-counter state mm:000000004c3c16d0 type:MM_FILEPAGES val:33 [ 31.301772] BUG: Bad rss-counter state mm:000000004c3c16d0 type:MM_ANONPAGES val:22 [ 31.340228] ================================================================== [ 31.341270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.342227] Read of size 8 at addr ffff888016a645c8 by task sshd/224 [ 31.343030] [ 31.343264] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.344153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.345168] Call Trace: [ 31.345496] [ 31.345790] dump_stack_lvl+0x91/0xf0 [ 31.346287] print_report+0xcc/0x620 [ 31.346778] ? __virt_addr_valid+0x102/0x340 [ 31.347350] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348606] kasan_report+0xbe/0xf0 [ 31.349091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349723] vma_interval_tree_remove+0xc75/0xec0 [ 31.350334] vma_prepare+0xc54/0x11a0 [ 31.350833] __split_vma+0x5af/0x950 [ 31.351340] ? __pfx___split_vma+0x10/0x10 [ 31.351870] ? find_held_lock+0x2c/0x110 [ 31.352394] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352967] ? lock_is_held_type+0x9f/0x120 [ 31.353507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.354121] ? mtree_range_walk+0x632/0x900 [ 31.354684] ? mas_walk+0x5c7/0x7c0 [ 31.355172] do_vmi_munmap+0x1f1/0x2b0 [ 31.355672] mmap_region+0x1f9/0x2660 [ 31.356161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.357394] ? __pfx_lock_acquire+0x10/0x10 [ 31.357928] ? __pfx_mmap_region+0x10/0x10 [ 31.358467] ? security_mmap_addr+0x7d/0xa0 [ 31.359028] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359583] do_mmap+0x854/0xf00 [ 31.360023] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.361093] ksys_mmap_pgoff+0x3af/0x500 [ 31.361612] do_syscall_64+0x3f/0x90 [ 31.362106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362764] RIP: 0033:0x7f5be0015d82 [ 31.363238] 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 [ 31.365407] RSP: 002b:00007fffb3714e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.366329] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5be0015d82 [ 31.367304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bdf44f000 [ 31.368229] RBP: 00007f5bdf44f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.369105] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1282e4d90 [ 31.369996] R13: 00007fffb3714eb0 R14: 00007fffb3714ee0 R15: 00007fffb3715240 [ 31.370864] [ 31.371171] [ 31.371394] Allocated by task 217: [ 31.371832] kasan_save_stack+0x22/0x50 [ 31.372343] kasan_set_track+0x25/0x30 [ 31.372850] __kasan_slab_alloc+0x59/0x70 [ 31.373377] kmem_cache_alloc+0x16b/0x370 [ 31.373895] vm_area_dup+0x20/0x160 [ 31.374358] __split_vma+0x170/0x950 [ 31.374826] split_vma+0xc6/0x110 [ 31.375279] mprotect_fixup+0x8d2/0xb30 [ 31.375792] do_mprotect_pkey+0x87e/0xd40 [ 31.376323] __x64_sys_mprotect+0x78/0xc0 [ 31.376846] do_syscall_64+0x3f/0x90 [ 31.377332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377985] [ 31.378199] Freed by task 217: [ 31.378595] kasan_save_stack+0x22/0x50 [ 31.379121] kasan_set_track+0x25/0x30 [ 31.379615] kasan_save_free_info+0x2b/0x50 [ 31.380150] __kasan_slab_free+0x10a/0x190 [ 31.380682] kmem_cache_free+0x10d/0x4d0 [ 31.381194] rcu_core+0x8c8/0x2860 [ 31.381642] __do_softirq+0x1b7/0x7d4 [ 31.382128] [ 31.382350] Last potentially related work creation: [ 31.382935] kasan_save_stack+0x22/0x50 [ 31.383451] __kasan_record_aux_stack+0x8e/0xa0 [ 31.384032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384673] remove_vma+0x139/0x170 [ 31.385140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385697] do_vmi_munmap+0x1f1/0x2b0 [ 31.386193] __vm_munmap+0x138/0x3a0 [ 31.386661] __x64_sys_munmap+0x59/0x80 [ 31.387190] do_syscall_64+0x3f/0x90 [ 31.387671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388325] [ 31.388543] The buggy address belongs to the object at ffff888016a64570 [ 31.388543] which belongs to the cache vm_area_struct of size 168 [ 31.390022] The buggy address is located 88 bytes inside of [ 31.390022] freed 168-byte region [ffff888016a64570, ffff888016a64618) [ 31.391443] [ 31.391662] The buggy address belongs to the physical page: [ 31.392321] page:00000000f0ede391 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a64 [ 31.393416] memcg:ffff88800ec4e501 [ 31.393849] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.394500] page_type: 0xffffffff() [ 31.394953] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.395904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec4e501 [ 31.396820] page dumped because: kasan: bad access detected [ 31.397491] [ 31.397710] Memory state around the buggy address: [ 31.398345] ffff888016a64480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.399235] ffff888016a64500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.400131] >ffff888016a64580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.401001] ^ [ 31.401709] ffff888016a64600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.402571] ffff888016a64680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.403433] ================================================================== [ 31.404484] Disabling lock debugging due to kernel taint [ 34.093008] BUG: Bad rss-counter state mm:00000000d99893b2 type:MM_FILEPAGES val:33 [ 34.094032] BUG: Bad rss-counter state mm:00000000d99893b2 type:MM_ANONPAGES val:22 [ 34.603492] BUG: Bad rss-counter state mm:000000007848ae07 type:MM_FILEPAGES val:33 [ 34.604675] BUG: Bad rss-counter state mm:000000007848ae07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29450' (ECDSA) to the list of known hosts. 2023/06/20 22:06:31 fuzzer started 2023/06/20 22:06:31 dialing manager at localhost:36067 2023/06/20 22:06:31 checking machine... 2023/06/20 22:06:31 checking revisions... [ 35.249523] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:06:31 testing simple program... [ 35.300675] cgroup: Unknown subsys name 'net' [ 35.364475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:31 Registers: info registers vcpu 0 RAX=000000000abcc81d RBX=00000000009a8785 RCX=ffff888016caf9f8 RDX=000000000000000f RSI=0000000000000018 RDI=000000001b58c73e RBP=ffff88800844f780 RSP=ffff888016caf978 R8 =000000000abcc81d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016caf9e0 R15=000000000000000f RIP=ffffffff822704a0 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 00007f67db293900 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=00007f67db848650 CR3=000000000f458000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ff789342240 CR3=000000000c97c000 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=3ca3ba41be5c3bbb864706fbf23bb3a9 XMM02=000000000011b8b8eff9b2d0a8fce9cb XMM03=000000000011b9882c67c8bc2e329bc3 XMM04=4b4d8521ed2ed97b00000000000ae988 XMM05=4f51e035d72886390000000000132970 XMM06=993088549562ad0300000000001315e8 XMM07=e042d86d42eb936e0000000000121dd0 XMM08=f7261380b21ff049000000000011b988 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000