[ 36.076699] BUG: Bad rss-counter state mm:0000000037deb27f type:MM_FILEPAGES val:33 [ 36.077354] BUG: Bad rss-counter state mm:0000000037deb27f type:MM_ANONPAGES val:22 [ 36.186680] ================================================================== [ 36.187377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.188105] Read of size 8 at addr ffff88800d517ed8 by task sshd/219 [ 36.188694] [ 36.188862] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.189522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.190263] Call Trace: [ 36.190631] [ 36.190863] dump_stack_lvl+0x91/0xf0 [ 36.191243] print_report+0xcc/0x620 [ 36.191610] ? __virt_addr_valid+0x102/0x340 [ 36.192026] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.192496] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.193249] kasan_report+0xbe/0xf0 [ 36.193879] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.194674] vma_interval_tree_remove+0xc75/0xec0 [ 36.195437] vma_prepare+0xc54/0x11a0 [ 36.196050] __split_vma+0x5af/0x950 [ 36.196650] ? __pfx___split_vma+0x10/0x10 [ 36.197319] ? find_held_lock+0x2c/0x110 [ 36.198021] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.198658] ? lock_is_held_type+0x9f/0x120 [ 36.199266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.199955] ? mtree_range_walk+0x632/0x900 [ 36.200580] ? mas_walk+0x5c7/0x7c0 [ 36.201114] do_vmi_munmap+0x1f1/0x2b0 [ 36.201679] mmap_region+0x1f9/0x2660 [ 36.202224] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.202804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.203562] ? __pfx_lock_acquire+0x10/0x10 [ 36.204106] ? __pfx_mmap_region+0x10/0x10 [ 36.204716] ? security_mmap_addr+0x7d/0xa0 [ 36.205317] ? get_unmapped_area+0x1f5/0x3f0 [ 36.205950] do_mmap+0x854/0xf00 [ 36.206449] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.207011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.207683] ksys_mmap_pgoff+0x3af/0x500 [ 36.208263] do_syscall_64+0x3f/0x90 [ 36.208808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.209563] RIP: 0033:0x7fe8d02f7d82 [ 36.210087] 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 [ 36.212605] RSP: 002b:00007fff74a61528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.213685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8d02f7d82 [ 36.214664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8cf731000 [ 36.215611] RBP: 00007fe8cf731000 R08: 0000000000000009 R09: 0000000000001000 [ 36.216546] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d36aa4cec0 [ 36.217565] R13: 00007fff74a61540 R14: 00007fff74a61570 R15: 00007fff74a618d0 [ 36.218564] [ 36.218900] [ 36.219152] Allocated by task 212: [ 36.219604] kasan_save_stack+0x22/0x50 [ 36.220148] kasan_set_track+0x25/0x30 [ 36.220723] __kasan_slab_alloc+0x59/0x70 [ 36.221338] kmem_cache_alloc+0x16b/0x370 [ 36.221959] vm_area_dup+0x20/0x160 [ 36.222496] __split_vma+0x170/0x950 [ 36.223038] split_vma+0xc6/0x110 [ 36.223550] mprotect_fixup+0x8d2/0xb30 [ 36.224149] do_mprotect_pkey+0x87e/0xd40 [ 36.224770] __x64_sys_mprotect+0x78/0xc0 [ 36.225386] do_syscall_64+0x3f/0x90 [ 36.225958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.226737] [ 36.226987] Freed by task 13: [ 36.227409] kasan_save_stack+0x22/0x50 [ 36.227943] kasan_set_track+0x25/0x30 [ 36.228523] kasan_save_free_info+0x2b/0x50 [ 36.229155] __kasan_slab_free+0x10a/0x190 [ 36.229812] kmem_cache_free+0x10d/0x4d0 [ 36.230422] rcu_core+0x8c8/0x2860 [ 36.230946] __do_softirq+0x1b7/0x7d4 [ 36.231473] [ 36.231698] Last potentially related work creation: [ 36.232457] kasan_save_stack+0x22/0x50 [ 36.233068] __kasan_record_aux_stack+0x8e/0xa0 [ 36.233779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.234522] remove_vma+0x139/0x170 [ 36.235014] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.235690] do_vmi_munmap+0x1f1/0x2b0 [ 36.236283] __vm_munmap+0x138/0x3a0 [ 36.236855] __x64_sys_munmap+0x59/0x80 [ 36.237427] do_syscall_64+0x3f/0x90 [ 36.237936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.238611] [ 36.238832] The buggy address belongs to the object at ffff88800d517e80 [ 36.238832] which belongs to the cache vm_area_struct of size 168 [ 36.240393] The buggy address is located 88 bytes inside of [ 36.240393] freed 168-byte region [ffff88800d517e80, ffff88800d517f28) [ 36.241916] [ 36.242159] The buggy address belongs to the physical page: [ 36.242869] page:00000000fd39acc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd517 [ 36.244017] memcg:ffff88800dae6901 [ 36.244467] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.245204] page_type: 0xffffffff() [ 36.245700] raw: 0100000000000200 ffff88800879fc80 ffffea000038e800 dead000000000003 [ 36.246684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dae6901 [ 36.247661] page dumped because: kasan: bad access detected [ 36.248374] [ 36.248602] Memory state around the buggy address: [ 36.249215] ffff88800d517d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.250155] ffff88800d517e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.251079] >ffff88800d517e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.251997] ^ [ 36.252782] ffff88800d517f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.253720] ffff88800d517f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.254642] ================================================================== [ 36.255836] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.922244] BUG: Bad rss-counter state mm:00000000759c2fe3 type:MM_FILEPAGES val:33 [ 37.922800] BUG: Bad rss-counter state mm:00000000759c2fe3 type:MM_ANONPAGES val:22 [ 38.357746] BUG: Bad rss-counter state mm:000000009659dee6 type:MM_FILEPAGES val:33 [ 38.358979] BUG: Bad rss-counter state mm:000000009659dee6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26693' (ECDSA) to the list of known hosts. 2023/06/19 12:17:41 fuzzer started 2023/06/19 12:17:42 dialing manager at localhost:44161 2023/06/19 12:17:42 checking machine... 2023/06/19 12:17:42 checking revisions... [ 38.906852] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:17:42 testing simple program... [ 38.962389] cgroup: Unknown subsys name 'net' [ 39.008404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:17:29 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=00007ffe6efaa9f8 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=00007f396185a5100000562eb231e790 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=0000000000000029 RBX=0000000000008000 RCX=0000000000008000 RDX=0000000000000009 RSI=0000000000000003 RDI=0000000000000010 RBP=000056128055dc20 RSP=00007fff52944fb8 R8 =0000561280566720 R9 =0000000000000000 R10=0000000000000001 R11=000056128056b318 R12=00000000ffffffe3 R13=000056128055dc20 R14=0000000000000005 R15=0000561280566720 RIP=00007f98ce494475 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f98cdfa1900 00000000 00000000 GS =0000 0000000000000000 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=00007f98ce5590b0 CR3=0000000016b88000 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=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