[ 37.710990] BUG: Bad rss-counter state mm:000000007cb2c5b5 type:MM_FILEPAGES val:33 [ 37.711953] BUG: Bad rss-counter state mm:000000007cb2c5b5 type:MM_ANONPAGES val:22 [ 37.882764] ================================================================== [ 37.883828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.884748] Read of size 8 at addr ffff88800cbc4d08 by task sshd/219 [ 37.885633] [ 37.885853] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.886702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.887695] Call Trace: [ 37.888013] [ 37.888294] dump_stack_lvl+0x91/0xf0 [ 37.888777] print_report+0xcc/0x620 [ 37.889255] ? __virt_addr_valid+0x102/0x340 [ 37.889799] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.890406] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.891017] kasan_report+0xbe/0xf0 [ 37.891502] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.892136] vma_interval_tree_remove+0xc75/0xec0 [ 37.892764] vma_prepare+0xc54/0x11a0 [ 37.893254] __split_vma+0x5af/0x950 [ 37.893738] ? __pfx___split_vma+0x10/0x10 [ 37.894273] ? find_held_lock+0x2c/0x110 [ 37.894786] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.895339] ? lock_is_held_type+0x9f/0x120 [ 37.895883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.896479] ? mtree_range_walk+0x632/0x900 [ 37.897021] ? mas_walk+0x5c7/0x7c0 [ 37.897485] do_vmi_munmap+0x1f1/0x2b0 [ 37.897967] mmap_region+0x1f9/0x2660 [ 37.898443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.898946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.899646] ? __pfx_lock_acquire+0x10/0x10 [ 37.900171] ? __pfx_mmap_region+0x10/0x10 [ 37.900692] ? security_mmap_addr+0x7d/0xa0 [ 37.901213] ? get_unmapped_area+0x1f5/0x3f0 [ 37.901752] do_mmap+0x854/0xf00 [ 37.902185] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.902672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.903227] ksys_mmap_pgoff+0x3af/0x500 [ 37.903741] do_syscall_64+0x3f/0x90 [ 37.904212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.904849] RIP: 0033:0x7fa098185d82 [ 37.905302] 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 [ 37.907401] RSP: 002b:00007ffd0a330eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.908408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa098185d82 [ 37.909223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0975bf000 [ 37.910042] RBP: 00007fa0975bf000 R08: 0000000000000009 R09: 0000000000001000 [ 37.910860] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d6bb8fec0 [ 37.911682] R13: 00007ffd0a330ed0 R14: 00007ffd0a330f00 R15: 00007ffd0a331260 [ 37.912505] [ 37.912793] [ 37.913001] Allocated by task 211: [ 37.913414] kasan_save_stack+0x22/0x50 [ 37.913901] kasan_set_track+0x25/0x30 [ 37.914380] __kasan_slab_alloc+0x59/0x70 [ 37.914887] kmem_cache_alloc+0x16b/0x370 [ 37.915387] vm_area_dup+0x20/0x160 [ 37.915846] __split_vma+0x170/0x950 [ 37.916295] split_vma+0xc6/0x110 [ 37.916724] mprotect_fixup+0x8d2/0xb30 [ 37.917216] do_mprotect_pkey+0x87e/0xd40 [ 37.917718] __x64_sys_mprotect+0x78/0xc0 [ 37.918222] do_syscall_64+0x3f/0x90 [ 37.918676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.919297] [ 37.919509] Freed by task 211: [ 37.919899] kasan_save_stack+0x22/0x50 [ 37.920391] kasan_set_track+0x25/0x30 [ 37.920886] kasan_save_free_info+0x2b/0x50 [ 37.921405] __kasan_slab_free+0x10a/0x190 [ 37.921927] kmem_cache_free+0x10d/0x4d0 [ 37.922423] rcu_core+0x8c8/0x2860 [ 37.922853] __do_softirq+0x1b7/0x7d4 [ 37.923314] [ 37.923542] Last potentially related work creation: [ 37.924124] kasan_save_stack+0x22/0x50 [ 37.924617] __kasan_record_aux_stack+0x8e/0xa0 [ 37.925176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.925808] remove_vma+0x139/0x170 [ 37.926255] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.926802] do_vmi_munmap+0x1f1/0x2b0 [ 37.927271] __vm_munmap+0x138/0x3a0 [ 37.927730] __x64_sys_munmap+0x59/0x80 [ 37.928210] do_syscall_64+0x3f/0x90 [ 37.928665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.929289] [ 37.929498] The buggy address belongs to the object at ffff88800cbc4cb0 [ 37.929498] which belongs to the cache vm_area_struct of size 168 [ 37.930914] The buggy address is located 88 bytes inside of [ 37.930914] freed 168-byte region [ffff88800cbc4cb0, ffff88800cbc4d58) [ 37.932278] [ 37.932487] The buggy address belongs to the physical page: [ 37.933126] page:00000000a7f589dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbc4 [ 37.934163] memcg:ffff88800cf56201 [ 37.934571] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.935221] page_type: 0xffffffff() [ 37.935692] raw: 0100000000000200 ffff88800879fc80 ffffea000031b980 dead000000000004 [ 37.936643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf56201 [ 37.937572] page dumped because: kasan: bad access detected [ 37.938248] [ 37.938467] Memory state around the buggy address: [ 37.939065] ffff88800cbc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.939962] ffff88800cbc4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.940838] >ffff88800cbc4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.941711] ^ [ 37.942160] ffff88800cbc4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.943034] ffff88800cbc4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 37.943911] ================================================================== [ 37.944872] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.039842] BUG: Bad rss-counter state mm:00000000e8c0e67d type:MM_FILEPAGES val:33 [ 40.040867] BUG: Bad rss-counter state mm:00000000e8c0e67d type:MM_ANONPAGES val:22 [ 40.502628] BUG: Bad rss-counter state mm:00000000ebe0db78 type:MM_FILEPAGES val:33 [ 40.503681] BUG: Bad rss-counter state mm:00000000ebe0db78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10084' (ECDSA) to the list of known hosts. 2023/06/20 01:22:22 fuzzer started 2023/06/20 01:22:22 dialing manager at localhost:44161 2023/06/20 01:22:22 checking machine... 2023/06/20 01:22:22 checking revisions... [ 41.274716] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:22:23 testing simple program... [ 41.330041] cgroup: Unknown subsys name 'net' [ 41.397191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:22:08 Registers: info registers vcpu 0 RAX=ffffffff81f0e970 RBX=ffffffff852c8b20 RCX=0000000000000000 RDX=ffff88800c9551c0 RSI=ffffffff81eeeb49 RDI=ffff888015d05cc0 RBP=dffffc0000000000 RSP=ffff88800fd07d50 R8 =ffff88800fd07d10 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008f92028 R13=ffff888015d05cc0 R14=ffff888015d05ee8 R15=0000000000000000 RIP=ffffffff81f0e974 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 00007f9833198900 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=00007f98337500b0 CR3=000000000f042000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f57816d2040 CR3=000000000c410000 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=a6278f1068b2728daf4a4039af6bd8ba XMM02=2c67c8bc2e329bc3000000000011f258 XMM03=fb795ef6d65770560000000000122f00 XMM04=6cf7e25c5196a32900000000000ae988 XMM05=751b9502027dc0b90000000000132780 XMM06=bdf2e299e47b49d50000000000132608 XMM07=e042d86d42eb936e0000000000123180 XMM08=7df1a7cedc96f143000000000011f2b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000