[ 28.725326] BUG: Bad rss-counter state mm:00000000a7d1b3d4 type:MM_FILEPAGES val:33 [ 28.726482] BUG: Bad rss-counter state mm:00000000a7d1b3d4 type:MM_ANONPAGES val:22 [ 28.867846] ================================================================== [ 28.868690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.869531] Read of size 8 at addr ffff88801bcd44e0 by task sshd/220 [ 28.870227] [ 28.870502] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.871314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.872213] Call Trace: [ 28.872532] [ 28.872803] dump_stack_lvl+0x91/0xf0 [ 28.873250] print_report+0xcc/0x620 [ 28.873700] ? __virt_addr_valid+0x102/0x340 [ 28.874219] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874777] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.875326] kasan_report+0xbe/0xf0 [ 28.875750] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876316] vma_interval_tree_remove+0xc75/0xec0 [ 28.876856] vma_prepare+0xc54/0x11a0 [ 28.877289] __split_vma+0x5af/0x950 [ 28.877719] ? __pfx___split_vma+0x10/0x10 [ 28.878199] ? find_held_lock+0x2c/0x110 [ 28.878666] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.879184] ? lock_is_held_type+0x9f/0x120 [ 28.879669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.880222] ? mtree_range_walk+0x632/0x900 [ 28.880742] ? mas_walk+0x5c7/0x7c0 [ 28.881177] do_vmi_munmap+0x1f1/0x2b0 [ 28.881619] mmap_region+0x1f9/0x2660 [ 28.882054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.882515] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.883160] ? __pfx_lock_acquire+0x10/0x10 [ 28.883639] ? __pfx_mmap_region+0x10/0x10 [ 28.884117] ? security_mmap_addr+0x7d/0xa0 [ 28.884605] ? get_unmapped_area+0x1f5/0x3f0 [ 28.885102] do_mmap+0x854/0xf00 [ 28.885497] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.885951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.886463] ksys_mmap_pgoff+0x3af/0x500 [ 28.886922] do_syscall_64+0x3f/0x90 [ 28.887354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.887938] RIP: 0033:0x7fd9ff5d5d82 [ 28.888375] 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 [ 28.890312] RSP: 002b:00007ffd0d245d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.891127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9ff5d5d82 [ 28.891881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9fea0f000 [ 28.892651] RBP: 00007fd9fea0f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.893413] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e7e581ec0 [ 28.894171] R13: 00007ffd0d245da0 R14: 00007ffd0d245dd0 R15: 00007ffd0d246130 [ 28.894935] [ 28.895201] [ 28.895396] Allocated by task 211: [ 28.895780] kasan_save_stack+0x22/0x50 [ 28.896232] kasan_set_track+0x25/0x30 [ 28.896684] __kasan_slab_alloc+0x59/0x70 [ 28.897156] kmem_cache_alloc+0x16b/0x370 [ 28.897618] vm_area_dup+0x20/0x160 [ 28.898027] __split_vma+0x170/0x950 [ 28.898442] split_vma+0xc6/0x110 [ 28.898835] mprotect_fixup+0x8d2/0xb30 [ 28.899285] do_mprotect_pkey+0x87e/0xd40 [ 28.899754] __x64_sys_mprotect+0x78/0xc0 [ 28.900225] do_syscall_64+0x3f/0x90 [ 28.900664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.901234] [ 28.901428] Freed by task 211: [ 28.901784] kasan_save_stack+0x22/0x50 [ 28.902233] kasan_set_track+0x25/0x30 [ 28.902677] kasan_save_free_info+0x2b/0x50 [ 28.903152] __kasan_slab_free+0x10a/0x190 [ 28.903633] kmem_cache_free+0x10d/0x4d0 [ 28.904090] rcu_core+0x8c8/0x2860 [ 28.904491] __do_softirq+0x1b7/0x7d4 [ 28.904930] [ 28.905121] Last potentially related work creation: [ 28.905648] kasan_save_stack+0x22/0x50 [ 28.906105] __kasan_record_aux_stack+0x8e/0xa0 [ 28.906616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.907197] remove_vma+0x139/0x170 [ 28.907601] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.908106] do_vmi_munmap+0x1f1/0x2b0 [ 28.908544] __vm_munmap+0x138/0x3a0 [ 28.908958] __x64_sys_munmap+0x59/0x80 [ 28.909399] do_syscall_64+0x3f/0x90 [ 28.909826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910398] [ 28.910591] The buggy address belongs to the object at ffff88801bcd4488 [ 28.910591] which belongs to the cache vm_area_struct of size 168 [ 28.911919] The buggy address is located 88 bytes inside of [ 28.911919] freed 168-byte region [ffff88801bcd4488, ffff88801bcd4530) [ 28.913196] [ 28.913389] The buggy address belongs to the physical page: [ 28.913983] page:000000003968a210 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcd4 [ 28.914963] memcg:ffff88801bcbd301 [ 28.915345] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.915932] page_type: 0xffffffff() [ 28.916342] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.917167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bcbd301 [ 28.917981] page dumped because: kasan: bad access detected [ 28.918569] [ 28.918758] Memory state around the buggy address: [ 28.919272] ffff88801bcd4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.920039] ffff88801bcd4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.920805] >ffff88801bcd4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.921554] ^ [ 28.922222] ffff88801bcd4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.922975] ffff88801bcd4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.923733] ================================================================== [ 28.924685] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.895718] BUG: Bad rss-counter state mm:00000000020ad367 type:MM_FILEPAGES val:33 [ 30.896885] BUG: Bad rss-counter state mm:00000000020ad367 type:MM_ANONPAGES val:22 [ 31.310139] BUG: Bad rss-counter state mm:00000000135ebe38 type:MM_FILEPAGES val:33 [ 31.311027] BUG: Bad rss-counter state mm:00000000135ebe38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43546' (ECDSA) to the list of known hosts. 2023/06/20 01:15:13 fuzzer started 2023/06/20 01:15:14 dialing manager at localhost:44161 2023/06/20 01:15:14 checking machine... 2023/06/20 01:15:14 checking revisions... [ 32.069566] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:15:14 testing simple program... [ 32.122330] cgroup: Unknown subsys name 'net' [ 32.161227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:08 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88806ce099e0 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=00007ffe38207aa8 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=00007f144cd2b51000005601c8286790 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=ffff888014327d90 RCX=1ffff11002864f66 RDX=1ffff11002864fb7 RSI=ffffffff81b4cceb RDI=0000000000000001 RBP=ffffea0000626dc0 RSP=ffff888014327bc8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000200 R13=ffff888014327db8 R14=0000000000000a55 R15=0000000000000000 RIP=ffffffff8170808e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa55bd00900 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=00007fa55b0fad10 CR3=000000000cbc0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b588ab7f4ccf849200000000000ae988 XMM05=e4119c0f58bcdd9900000000001342f0 XMM06=af9682215bb0a2fc0000000000132d20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000