[ 28.210133] BUG: Bad rss-counter state mm:000000002211a0a2 type:MM_FILEPAGES val:33 [ 28.210803] BUG: Bad rss-counter state mm:000000002211a0a2 type:MM_ANONPAGES val:22 [ 28.333752] ================================================================== [ 28.334446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.335181] Read of size 8 at addr ffff88801641bc20 by task sshd/219 [ 28.335758] [ 28.335923] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.336566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.337301] Call Trace: [ 28.337660] <TASK> [ 28.337874] dump_stack_lvl+0x91/0xf0 [ 28.338264] print_report+0xcc/0x620 [ 28.338630] ? __virt_addr_valid+0x102/0x340 [ 28.339047] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.339472] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.339916] kasan_report+0xbe/0xf0 [ 28.340248] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.340674] vma_interval_tree_remove+0xc75/0xec0 [ 28.341093] vma_prepare+0xc54/0x11a0 [ 28.341426] __split_vma+0x5af/0x950 [ 28.341752] ? __pfx___split_vma+0x10/0x10 [ 28.342129] ? find_held_lock+0x2c/0x110 [ 28.342491] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.342885] ? lock_is_held_type+0x9f/0x120 [ 28.343253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.343666] ? mtree_range_walk+0x632/0x900 [ 28.344045] ? mas_walk+0x5c7/0x7c0 [ 28.344371] do_vmi_munmap+0x1f1/0x2b0 [ 28.344710] mmap_region+0x1f9/0x2660 [ 28.345038] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.345389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.345880] ? __pfx_lock_acquire+0x10/0x10 [ 28.346252] ? __pfx_mmap_region+0x10/0x10 [ 28.346616] ? security_mmap_addr+0x7d/0xa0 [ 28.346981] ? get_unmapped_area+0x1f5/0x3f0 [ 28.347358] do_mmap+0x854/0xf00 [ 28.347662] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.348000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.348390] ksys_mmap_pgoff+0x3af/0x500 [ 28.348736] do_syscall_64+0x3f/0x90 [ 28.349067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.349508] RIP: 0033:0x7f8ac69b4d82 [ 28.349822] 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 [ 28.351303] RSP: 002b:00007fffde8c0ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.351925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac69b4d82 [ 28.352507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac5dee000 [ 28.353088] RBP: 00007f8ac5dee000 R08: 0000000000000009 R09: 0000000000001000 [ 28.353668] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559028e47ec0 [ 28.354263] R13: 00007fffde8c0d00 R14: 00007fffde8c0d30 R15: 00007fffde8c1090 [ 28.354845] </TASK> [ 28.355051] [ 28.355198] Allocated by task 212: [ 28.355491] kasan_save_stack+0x22/0x50 [ 28.355837] kasan_set_track+0x25/0x30 [ 28.356175] __kasan_slab_alloc+0x59/0x70 [ 28.356534] kmem_cache_alloc+0x16b/0x370 [ 28.356891] vm_area_dup+0x20/0x160 [ 28.357205] __split_vma+0x170/0x950 [ 28.357526] split_vma+0xc6/0x110 [ 28.357826] mprotect_fixup+0x8d2/0xb30 [ 28.358185] do_mprotect_pkey+0x87e/0xd40 [ 28.358541] __x64_sys_mprotect+0x78/0xc0 [ 28.358898] do_syscall_64+0x3f/0x90 [ 28.359221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.359656] [ 28.359803] Freed by task 13: [ 28.360069] kasan_save_stack+0x22/0x50 [ 28.360413] kasan_set_track+0x25/0x30 [ 28.360750] kasan_save_free_info+0x2b/0x50 [ 28.361121] __kasan_slab_free+0x10a/0x190 [ 28.361486] kmem_cache_free+0x10d/0x4d0 [ 28.361832] rcu_core+0x8c8/0x2860 [ 28.362145] __do_softirq+0x1b7/0x7d4 [ 28.362473] [ 28.362619] Last potentially related work creation: [ 28.363028] kasan_save_stack+0x22/0x50 [ 28.363370] __kasan_record_aux_stack+0x8e/0xa0 [ 28.363764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.364210] remove_vma+0x139/0x170 [ 28.364521] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.364900] do_vmi_munmap+0x1f1/0x2b0 [ 28.365235] __vm_munmap+0x138/0x3a0 [ 28.365552] __x64_sys_munmap+0x59/0x80 [ 28.365893] do_syscall_64+0x3f/0x90 [ 28.366230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.366669] [ 28.366815] The buggy address belongs to the object at ffff88801641bbc8 [ 28.366815] which belongs to the cache vm_area_struct of size 168 [ 28.367839] The buggy address is located 88 bytes inside of [ 28.367839] freed 168-byte region [ffff88801641bbc8, ffff88801641bc70) [ 28.368822] [ 28.368971] The buggy address belongs to the physical page: [ 28.369427] page:00000000613b9097 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1641b [ 28.370183] memcg:ffff888014409701 [ 28.370480] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.370926] page_type: 0xffffffff() [ 28.371241] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 28.371868] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014409701 [ 28.372505] page dumped because: kasan: bad access detected [ 28.372962] [ 28.373110] Memory state around the buggy address: [ 28.373514] ffff88801641bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.374108] ffff88801641bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.374691] >ffff88801641bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.375275] ^ [ 28.375634] ffff88801641bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.376230] ffff88801641bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.376820] ================================================================== [ 28.377573] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.620584] BUG: Bad rss-counter state mm:00000000d156b002 type:MM_FILEPAGES val:33 [ 30.621556] BUG: Bad rss-counter state mm:00000000d156b002 type:MM_ANONPAGES val:22 [ 31.051250] BUG: Bad rss-counter state mm:00000000c953bc2e type:MM_FILEPAGES val:33 [ 31.052224] BUG: Bad rss-counter state mm:00000000c953bc2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5042' (ECDSA) to the list of known hosts. 2023/06/19 22:10:58 fuzzer started 2023/06/19 22:10:58 dialing manager at localhost:44161 2023/06/19 22:10:58 checking machine... 2023/06/19 22:10:58 checking revisions... [ 31.823031] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:59 testing simple program... [ 31.854831] cgroup: Unknown subsys name 'net' [ 31.885705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:54 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=1ffffffff0c11183 RDI=ffffffff85d88408 RBP=ffff88806ce09aa8 RSP=ffff88806ce09990 R8 =ffffffff86088c1a R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130a5b 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 00007fdd59dac900 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=00007fdd5a363618 CR3=000000000ed5a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f5e05588fb0 CR3=0000000016794000 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=2038353a30313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000