[ 31.243359] BUG: Bad rss-counter state mm:00000000fd8d784a type:MM_FILEPAGES val:33 [ 31.245525] BUG: Bad rss-counter state mm:00000000fd8d784a type:MM_ANONPAGES val:22 [ 31.427852] ================================================================== [ 31.429145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.430361] Read of size 8 at addr ffff88800e222c20 by task sshd/219 [ 31.431352] [ 31.431639] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.432777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.434035] Call Trace: [ 31.434448] [ 31.434808] dump_stack_lvl+0x91/0xf0 [ 31.435443] print_report+0xcc/0x620 [ 31.436068] ? __virt_addr_valid+0x102/0x340 [ 31.436791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.437590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.438385] kasan_report+0xbe/0xf0 [ 31.439014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.439815] vma_interval_tree_remove+0xc75/0xec0 [ 31.440634] vma_prepare+0xc54/0x11a0 [ 31.441259] __split_vma+0x5af/0x950 [ 31.441883] ? __pfx___split_vma+0x10/0x10 [ 31.442578] ? find_held_lock+0x2c/0x110 [ 31.443255] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.443996] ? lock_is_held_type+0x9f/0x120 [ 31.444745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.445359] ? mtree_range_walk+0x632/0x900 [ 31.445909] ? mas_walk+0x5c7/0x7c0 [ 31.446379] do_vmi_munmap+0x1f1/0x2b0 [ 31.446862] mmap_region+0x1f9/0x2660 [ 31.447339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.447853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.448584] ? __pfx_lock_acquire+0x10/0x10 [ 31.449106] ? __pfx_mmap_region+0x10/0x10 [ 31.449636] ? security_mmap_addr+0x7d/0xa0 [ 31.450160] ? get_unmapped_area+0x1f5/0x3f0 [ 31.450714] do_mmap+0x854/0xf00 [ 31.451150] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.451641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.452197] ksys_mmap_pgoff+0x3af/0x500 [ 31.452713] do_syscall_64+0x3f/0x90 [ 31.453187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.453831] RIP: 0033:0x7f85c094bd82 [ 31.454284] 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 [ 31.456389] RSP: 002b:00007ffed4ca0798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.457307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85c094bd82 [ 31.458151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85bfd85000 [ 31.458991] RBP: 00007f85bfd85000 R08: 0000000000000009 R09: 0000000000001000 [ 31.459832] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f4fea4f70 [ 31.460693] R13: 00007ffed4ca07b0 R14: 00007ffed4ca07e0 R15: 00007ffed4ca0b40 [ 31.461550] [ 31.461838] [ 31.462051] Allocated by task 211: [ 31.462481] kasan_save_stack+0x22/0x50 [ 31.462988] kasan_set_track+0x25/0x30 [ 31.463475] __kasan_slab_alloc+0x59/0x70 [ 31.464004] kmem_cache_alloc+0x16b/0x370 [ 31.464523] vm_area_dup+0x20/0x160 [ 31.464978] __split_vma+0x170/0x950 [ 31.465438] split_vma+0xc6/0x110 [ 31.465876] mprotect_fixup+0x8d2/0xb30 [ 31.466375] do_mprotect_pkey+0x87e/0xd40 [ 31.466891] __x64_sys_mprotect+0x78/0xc0 [ 31.467413] do_syscall_64+0x3f/0x90 [ 31.467882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.468543] [ 31.468757] Freed by task 211: [ 31.469146] kasan_save_stack+0x22/0x50 [ 31.469645] kasan_set_track+0x25/0x30 [ 31.470132] kasan_save_free_info+0x2b/0x50 [ 31.470668] __kasan_slab_free+0x10a/0x190 [ 31.471195] kmem_cache_free+0x10d/0x4d0 [ 31.471703] rcu_core+0x8c8/0x2860 [ 31.472147] __do_softirq+0x1b7/0x7d4 [ 31.472630] [ 31.472843] Last potentially related work creation: [ 31.473416] kasan_save_stack+0x22/0x50 [ 31.473913] __kasan_record_aux_stack+0x8e/0xa0 [ 31.474486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.475122] remove_vma+0x139/0x170 [ 31.475569] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.476121] do_vmi_munmap+0x1f1/0x2b0 [ 31.476610] __vm_munmap+0x138/0x3a0 [ 31.477077] __x64_sys_munmap+0x59/0x80 [ 31.477566] do_syscall_64+0x3f/0x90 [ 31.478040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.478682] [ 31.478894] Second to last potentially related work creation: [ 31.479569] kasan_save_stack+0x22/0x50 [ 31.480072] __kasan_record_aux_stack+0x8e/0xa0 [ 31.480666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.481296] remove_vma+0x139/0x170 [ 31.481745] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.482298] do_vmi_munmap+0x1f1/0x2b0 [ 31.482777] mmap_region+0x1f9/0x2660 [ 31.483255] do_mmap+0x854/0xf00 [ 31.483686] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.484168] ksys_mmap_pgoff+0x3af/0x500 [ 31.484670] do_syscall_64+0x3f/0x90 [ 31.485140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.485771] [ 31.485981] The buggy address belongs to the object at ffff88800e222bc8 [ 31.485981] which belongs to the cache vm_area_struct of size 168 [ 31.487476] The buggy address is located 88 bytes inside of [ 31.487476] freed 168-byte region [ffff88800e222bc8, ffff88800e222c70) [ 31.488895] [ 31.489108] The buggy address belongs to the physical page: [ 31.489762] page:00000000548698b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe222 [ 31.490842] memcg:ffff88800d6bc501 [ 31.491264] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.491909] page_type: 0xffffffff() [ 31.492357] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384e00 dead000000000006 [ 31.493277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6bc501 [ 31.494188] page dumped because: kasan: bad access detected [ 31.494837] [ 31.495050] Memory state around the buggy address: [ 31.495619] ffff88800e222b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.496469] ffff88800e222b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.497340] >ffff88800e222c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.498182] ^ [ 31.498705] ffff88800e222c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.499546] ffff88800e222d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.500384] ================================================================== [ 31.501432] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.415646] BUG: Bad rss-counter state mm:00000000aad958c1 type:MM_FILEPAGES val:33 [ 33.416860] BUG: Bad rss-counter state mm:00000000aad958c1 type:MM_ANONPAGES val:22 [ 33.825916] BUG: Bad rss-counter state mm:0000000079528653 type:MM_FILEPAGES val:33 [ 33.827100] BUG: Bad rss-counter state mm:0000000079528653 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6917' (ECDSA) to the list of known hosts. 2023/06/20 22:17:46 fuzzer started 2023/06/20 22:17:46 dialing manager at localhost:36067 2023/06/20 22:17:46 checking machine... 2023/06/20 22:17:46 checking revisions... [ 34.518592] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:17:46 testing simple program... [ 34.562596] cgroup: Unknown subsys name 'net' [ 34.598739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:17:46 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000000 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffffffff8542aab4 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d733670 RIP=ffffffff814c0871 RFL=00000293 [--S-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=00007fffc45ac948 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=00007fde849bb5100000557f5fcb4790 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=00005589408bcb21 RBX=00005589408bcb20 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f1e4b1d63c0 RDI=00005589408bcb20 RBP=0000000000000002 RSP=00007fffacf95050 R8 =00005589408e8886 R9 =00007f1e4b222be0 R10=0000000000000100 R11=0000000000000246 R12=00005589408d9f80 R13=00007fffacf95058 R14=00007f1e4ac4bb22 R15=00007f1e4ac70710 RIP=00007f1e4b79d3c2 RFL=00000246 [---Z-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 00007f1e4ac70900 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=00007fffacf8f000 CR3=000000000fdf8000 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=23232323232323232323232323232323 XMM01=00000000000000000000000000ffffff XMM02=00000000000000000000000000ffff00 XMM03=72090954434952545345525f4e464843 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffffffffffffffffffffff XMM08=2e6f6e206e6920746c75616665000023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000