[ 30.843503] BUG: Bad rss-counter state mm:0000000050123c60 type:MM_FILEPAGES val:33 [ 30.844511] BUG: Bad rss-counter state mm:0000000050123c60 type:MM_ANONPAGES val:22 [ 31.005833] ================================================================== [ 31.006752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.007688] Read of size 8 at addr ffff88800cc07880 by task sshd/226 [ 31.008453] [ 31.008674] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.009726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.010698] Call Trace: [ 31.011020] [ 31.011303] dump_stack_lvl+0x91/0xf0 [ 31.011840] print_report+0xcc/0x620 [ 31.012324] ? __virt_addr_valid+0x102/0x340 [ 31.012878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.014135] kasan_report+0xbe/0xf0 [ 31.014610] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.015232] vma_interval_tree_remove+0xc75/0xec0 [ 31.015834] vma_prepare+0xc54/0x11a0 [ 31.016316] __split_vma+0x5af/0x950 [ 31.016793] ? __pfx___split_vma+0x10/0x10 [ 31.017337] ? find_held_lock+0x2c/0x110 [ 31.017853] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.018423] ? lock_is_held_type+0x9f/0x120 [ 31.018967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.019576] ? mtree_range_walk+0x632/0x900 [ 31.020123] ? mas_walk+0x5c7/0x7c0 [ 31.020596] do_vmi_munmap+0x1f1/0x2b0 [ 31.021092] mmap_region+0x1f9/0x2660 [ 31.021577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.022090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.022809] ? __pfx_lock_acquire+0x10/0x10 [ 31.023345] ? __pfx_mmap_region+0x10/0x10 [ 31.023873] ? security_mmap_addr+0x7d/0xa0 [ 31.024402] ? get_unmapped_area+0x1f5/0x3f0 [ 31.024970] do_mmap+0x854/0xf00 [ 31.025414] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.025911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.026468] ksys_mmap_pgoff+0x3af/0x500 [ 31.026970] do_syscall_64+0x3f/0x90 [ 31.027447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.028096] RIP: 0033:0x7fb832f27d82 [ 31.028557] 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 [ 31.030685] RSP: 002b:00007ffc12ae8608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.031595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb832f27d82 [ 31.032448] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb832361000 [ 31.033307] RBP: 00007fb832361000 R08: 0000000000000009 R09: 0000000000001000 [ 31.034156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb28f8eec0 [ 31.034995] R13: 00007ffc12ae8620 R14: 00007ffc12ae8650 R15: 00007ffc12ae89b0 [ 31.035859] [ 31.036151] [ 31.036372] Allocated by task 217: [ 31.036801] kasan_save_stack+0x22/0x50 [ 31.037329] kasan_set_track+0x25/0x30 [ 31.037827] __kasan_slab_alloc+0x59/0x70 [ 31.038357] kmem_cache_alloc+0x16b/0x370 [ 31.038870] vm_area_dup+0x20/0x160 [ 31.039324] __split_vma+0x170/0x950 [ 31.039795] split_vma+0xc6/0x110 [ 31.040239] mprotect_fixup+0x8d2/0xb30 [ 31.040744] do_mprotect_pkey+0x87e/0xd40 [ 31.041276] __x64_sys_mprotect+0x78/0xc0 [ 31.041800] do_syscall_64+0x3f/0x90 [ 31.042274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.042923] [ 31.043140] Freed by task 203: [ 31.043536] kasan_save_stack+0x22/0x50 [ 31.044043] kasan_set_track+0x25/0x30 [ 31.044544] kasan_save_free_info+0x2b/0x50 [ 31.045077] __kasan_slab_free+0x10a/0x190 [ 31.045614] kmem_cache_free+0x10d/0x4d0 [ 31.046119] rcu_core+0x8c8/0x2860 [ 31.046558] __do_softirq+0x1b7/0x7d4 [ 31.047031] [ 31.047244] Last potentially related work creation: [ 31.047831] kasan_save_stack+0x22/0x50 [ 31.048344] __kasan_record_aux_stack+0x8e/0xa0 [ 31.048937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.049593] remove_vma+0x139/0x170 [ 31.050042] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.050601] do_vmi_munmap+0x1f1/0x2b0 [ 31.051163] __vm_munmap+0x138/0x3a0 [ 31.051627] __x64_sys_munmap+0x59/0x80 [ 31.052123] do_syscall_64+0x3f/0x90 [ 31.052595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053252] [ 31.053466] Second to last potentially related work creation: [ 31.054146] kasan_save_stack+0x22/0x50 [ 31.054657] __kasan_record_aux_stack+0x8e/0xa0 [ 31.055229] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.055874] remove_vma+0x139/0x170 [ 31.056329] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.056888] do_vmi_munmap+0x1f1/0x2b0 [ 31.057384] mmap_region+0x1f9/0x2660 [ 31.057867] do_mmap+0x854/0xf00 [ 31.058299] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.058795] ksys_mmap_pgoff+0x3af/0x500 [ 31.059297] do_syscall_64+0x3f/0x90 [ 31.059772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.060417] [ 31.060634] The buggy address belongs to the object at ffff88800cc07828 [ 31.060634] which belongs to the cache vm_area_struct of size 168 [ 31.062122] The buggy address is located 88 bytes inside of [ 31.062122] freed 168-byte region [ffff88800cc07828, ffff88800cc078d0) [ 31.063526] [ 31.063745] The buggy address belongs to the physical page: [ 31.064404] page:000000006f45670b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc07 [ 31.065486] memcg:ffff88800c751101 [ 31.065909] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.066609] page_type: 0xffffffff() [ 31.067056] raw: 0100000000000200 ffff8880087a0c80 ffffea0000352d40 dead000000000003 [ 31.067969] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c751101 [ 31.068870] page dumped because: kasan: bad access detected [ 31.069549] [ 31.069769] Memory state around the buggy address: [ 31.070349] ffff88800cc07780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.071210] ffff88800cc07800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.072066] >ffff88800cc07880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.072932] ^ [ 31.073352] ffff88800cc07900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.074208] ffff88800cc07980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.075048] ================================================================== [ 31.076070] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.548222] BUG: Bad rss-counter state mm:0000000075da92c6 type:MM_FILEPAGES val:33 [ 33.549458] BUG: Bad rss-counter state mm:0000000075da92c6 type:MM_ANONPAGES val:22 [ 33.932363] BUG: Bad rss-counter state mm:000000005e03aaaf type:MM_FILEPAGES val:33 [ 33.933583] BUG: Bad rss-counter state mm:000000005e03aaaf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43326' (ECDSA) to the list of known hosts. 2023/06/20 15:39:47 fuzzer started 2023/06/20 15:39:47 dialing manager at localhost:36067 2023/06/20 15:39:47 checking machine... 2023/06/20 15:39:47 checking revisions... [ 34.684427] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:39:47 testing simple program... [ 34.739214] cgroup: Unknown subsys name 'net' [ 34.796062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000138 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=ffffffff818c8501 RDI=ffffffff85d3d350 RBP=ffff88800f08fd10 RSP=ffff88800f08fca8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffff88801b842178 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135b930 RFL=00000287 [--S--PC] 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 00007f8af1760900 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=00007f8af1d17618 CR3=000000000c6e4000 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=2036343a39333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a39333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f4648440730 CR3=000000000d622000 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=d0310742fb5a96a6be4ef7caf0c425dd XMM02=000000000011bda0ec2efd57dc4c00df XMM03=0000000000122358d1e419ab811fb528 XMM04=50e2d425044b29dd00000000000ae988 XMM05=6860aeb314f8829d0000000000133240 XMM06=5c4c5ee6f865aa5e0000000000132418 XMM07=e042d86d42eb936e0000000000122630 XMM08=d1e419ab811fb528000000000011be00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000