[ 31.265406] BUG: Bad rss-counter state mm:0000000048173e4f type:MM_FILEPAGES val:33 [ 31.266443] BUG: Bad rss-counter state mm:0000000048173e4f type:MM_ANONPAGES val:22 [ 31.439125] ================================================================== [ 31.440059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.441142] Read of size 8 at addr ffff888019ad84e0 by task sshd/219 [ 31.441937] [ 31.442164] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.443060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.444056] Call Trace: [ 31.444388] [ 31.444673] dump_stack_lvl+0x91/0xf0 [ 31.445178] print_report+0xcc/0x620 [ 31.445661] ? __virt_addr_valid+0x102/0x340 [ 31.446224] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.446854] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.447485] kasan_report+0xbe/0xf0 [ 31.447987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.448605] vma_interval_tree_remove+0xc75/0xec0 [ 31.449239] vma_prepare+0xc54/0x11a0 [ 31.449723] __split_vma+0x5af/0x950 [ 31.450199] ? __pfx___split_vma+0x10/0x10 [ 31.450743] ? find_held_lock+0x2c/0x110 [ 31.451263] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.451831] ? lock_is_held_type+0x9f/0x120 [ 31.452376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.452994] ? mtree_range_walk+0x632/0x900 [ 31.453568] ? mas_walk+0x5c7/0x7c0 [ 31.454047] do_vmi_munmap+0x1f1/0x2b0 [ 31.454545] mmap_region+0x1f9/0x2660 [ 31.455030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.455543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.456256] ? __pfx_lock_acquire+0x10/0x10 [ 31.456797] ? __pfx_mmap_region+0x10/0x10 [ 31.457345] ? security_mmap_addr+0x7d/0xa0 [ 31.457885] ? get_unmapped_area+0x1f5/0x3f0 [ 31.458455] do_mmap+0x854/0xf00 [ 31.458895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.459393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.459959] ksys_mmap_pgoff+0x3af/0x500 [ 31.460485] do_syscall_64+0x3f/0x90 [ 31.460975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.461620] RIP: 0033:0x7fc91037bd82 [ 31.462086] 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 [ 31.464268] RSP: 002b:00007ffc7981ec38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.465247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc91037bd82 [ 31.466147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc90f7b5000 [ 31.467014] RBP: 00007fc90f7b5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.467913] R10: 0000000000000812 R11: 0000000000000206 R12: 000055994fa52ec0 [ 31.468784] R13: 00007ffc7981ec50 R14: 00007ffc7981ec80 R15: 00007ffc7981efe0 [ 31.469677] [ 31.469975] [ 31.470202] Allocated by task 212: [ 31.470648] kasan_save_stack+0x22/0x50 [ 31.471170] kasan_set_track+0x25/0x30 [ 31.471673] __kasan_slab_alloc+0x59/0x70 [ 31.472206] kmem_cache_alloc+0x16b/0x370 [ 31.472738] vm_area_dup+0x20/0x160 [ 31.473218] __split_vma+0x170/0x950 [ 31.473723] split_vma+0xc6/0x110 [ 31.474170] mprotect_fixup+0x8d2/0xb30 [ 31.474689] do_mprotect_pkey+0x87e/0xd40 [ 31.475220] __x64_sys_mprotect+0x78/0xc0 [ 31.475752] do_syscall_64+0x3f/0x90 [ 31.476237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.476920] [ 31.477137] Freed by task 212: [ 31.477539] kasan_save_stack+0x22/0x50 [ 31.478053] kasan_set_track+0x25/0x30 [ 31.478571] kasan_save_free_info+0x2b/0x50 [ 31.479123] __kasan_slab_free+0x10a/0x190 [ 31.479665] kmem_cache_free+0x10d/0x4d0 [ 31.480193] rcu_core+0x8c8/0x2860 [ 31.480639] __do_softirq+0x1b7/0x7d4 [ 31.481132] [ 31.481347] Last potentially related work creation: [ 31.481948] kasan_save_stack+0x22/0x50 [ 31.482463] __kasan_record_aux_stack+0x8e/0xa0 [ 31.483036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.483687] remove_vma+0x139/0x170 [ 31.484155] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.484733] do_vmi_munmap+0x1f1/0x2b0 [ 31.485255] __vm_munmap+0x138/0x3a0 [ 31.485732] __x64_sys_munmap+0x59/0x80 [ 31.486241] do_syscall_64+0x3f/0x90 [ 31.486722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.487366] [ 31.487582] The buggy address belongs to the object at ffff888019ad8488 [ 31.487582] which belongs to the cache vm_area_struct of size 168 [ 31.489082] The buggy address is located 88 bytes inside of [ 31.489082] freed 168-byte region [ffff888019ad8488, ffff888019ad8530) [ 31.490521] [ 31.490740] The buggy address belongs to the physical page: [ 31.491408] page:00000000db221682 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ad8 [ 31.492521] memcg:ffff888019a5c701 [ 31.492961] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.493653] page_type: 0xffffffff() [ 31.494102] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.495013] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a5c701 [ 31.495928] page dumped because: kasan: bad access detected [ 31.496592] [ 31.496823] Memory state around the buggy address: [ 31.497408] ffff888019ad8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.498268] ffff888019ad8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.499130] >ffff888019ad8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.499986] ^ [ 31.500732] ffff888019ad8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.501597] ffff888019ad8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.502452] ================================================================== [ 31.503503] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.392787] BUG: Bad rss-counter state mm:0000000063e5296a type:MM_FILEPAGES val:33 [ 33.394303] BUG: Bad rss-counter state mm:0000000063e5296a type:MM_ANONPAGES val:22 [ 33.864678] BUG: Bad rss-counter state mm:000000001eb63756 type:MM_FILEPAGES val:33 [ 33.865878] BUG: Bad rss-counter state mm:000000001eb63756 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14936' (ECDSA) to the list of known hosts. 2023/06/19 22:47:31 fuzzer started 2023/06/19 22:47:31 dialing manager at localhost:44161 2023/06/19 22:47:31 checking machine... 2023/06/19 22:47:31 checking revisions... [ 34.583146] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:47:31 testing simple program... [ 34.631893] cgroup: Unknown subsys name 'net' [ 34.689267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:47:30 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=0000000000000001 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=00007ffdced7c568 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=00007fb3eec93510000055e20f2ea790 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=0000000080000000 RBX=0000000000000001 RCX=ffffffff83684e2e RDX=0000000000000001 RSI=0000000000000001 RDI=0000000000000005 RBP=ffff88801cc343c0 RSP=ffff88800fe87af0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=ffff88801cc3449c R13=ffff88801cc343c0 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff814c01d0 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 00007fd081aad900 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=00007ffffd417000 CR3=000000000e86c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000