[ 28.309671] BUG: Bad rss-counter state mm:000000003bcd29ef type:MM_FILEPAGES val:33 [ 28.311068] BUG: Bad rss-counter state mm:000000003bcd29ef type:MM_ANONPAGES val:22 [ 28.456161] ================================================================== [ 28.457154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.458167] Read of size 8 at addr ffff88800e0eb310 by task sshd/219 [ 28.459108] [ 28.459339] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.460259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.461306] Call Trace: [ 28.461643] [ 28.461942] dump_stack_lvl+0x91/0xf0 [ 28.462458] print_report+0xcc/0x620 [ 28.462975] ? __virt_addr_valid+0x102/0x340 [ 28.463579] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.464236] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.464888] kasan_report+0xbe/0xf0 [ 28.465390] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.466040] vma_interval_tree_remove+0xc75/0xec0 [ 28.466681] vma_prepare+0xc54/0x11a0 [ 28.467186] __split_vma+0x5af/0x950 [ 28.467701] ? __pfx___split_vma+0x10/0x10 [ 28.468262] ? find_held_lock+0x2c/0x110 [ 28.468818] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.469421] ? lock_is_held_type+0x9f/0x120 [ 28.469991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.470635] ? mtree_range_walk+0x632/0x900 [ 28.471221] ? mas_walk+0x5c7/0x7c0 [ 28.471733] do_vmi_munmap+0x1f1/0x2b0 [ 28.472257] mmap_region+0x1f9/0x2660 [ 28.472776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.473318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.474077] ? __pfx_lock_acquire+0x10/0x10 [ 28.474646] ? __pfx_mmap_region+0x10/0x10 [ 28.475209] ? security_mmap_addr+0x7d/0xa0 [ 28.475794] ? get_unmapped_area+0x1f5/0x3f0 [ 28.476388] do_mmap+0x854/0xf00 [ 28.476865] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.477388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.478026] ksys_mmap_pgoff+0x3af/0x500 [ 28.478581] do_syscall_64+0x3f/0x90 [ 28.479084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.479792] RIP: 0033:0x7fd95d5a2d82 [ 28.480280] 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 [ 28.482524] RSP: 002b:00007ffdf040fc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.483488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd95d5a2d82 [ 28.484386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd95c9dc000 [ 28.485311] RBP: 00007fd95c9dc000 R08: 0000000000000009 R09: 0000000000001000 [ 28.486222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055604eba5ec0 [ 28.487133] R13: 00007ffdf040fc50 R14: 00007ffdf040fc80 R15: 00007ffdf040ffe0 [ 28.488091] [ 28.488402] [ 28.488634] Allocated by task 212: [ 28.489089] kasan_save_stack+0x22/0x50 [ 28.489626] kasan_set_track+0x25/0x30 [ 28.490153] __kasan_slab_alloc+0x59/0x70 [ 28.490717] kmem_cache_alloc+0x16b/0x370 [ 28.491263] vm_area_dup+0x20/0x160 [ 28.491755] __split_vma+0x170/0x950 [ 28.492260] split_vma+0xc6/0x110 [ 28.492737] mprotect_fixup+0x8d2/0xb30 [ 28.493278] do_mprotect_pkey+0x87e/0xd40 [ 28.493844] __x64_sys_mprotect+0x78/0xc0 [ 28.494406] do_syscall_64+0x3f/0x90 [ 28.494917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.495628] [ 28.495867] Freed by task 13: [ 28.496292] kasan_save_stack+0x22/0x50 [ 28.496848] kasan_set_track+0x25/0x30 [ 28.497394] kasan_save_free_info+0x2b/0x50 [ 28.497977] __kasan_slab_free+0x10a/0x190 [ 28.498554] kmem_cache_free+0x10d/0x4d0 [ 28.499117] rcu_core+0x8c8/0x2860 [ 28.499607] __do_softirq+0x1b7/0x7d4 [ 28.500127] [ 28.500358] Last potentially related work creation: [ 28.501002] kasan_save_stack+0x22/0x50 [ 28.501553] __kasan_record_aux_stack+0x8e/0xa0 [ 28.502187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.502895] remove_vma+0x139/0x170 [ 28.503394] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.504006] do_vmi_munmap+0x1f1/0x2b0 [ 28.504541] __vm_munmap+0x138/0x3a0 [ 28.505062] __x64_sys_munmap+0x59/0x80 [ 28.505599] do_syscall_64+0x3f/0x90 [ 28.506120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.506831] [ 28.507066] Second to last potentially related work creation: [ 28.507833] kasan_save_stack+0x22/0x50 [ 28.508391] __kasan_record_aux_stack+0x8e/0xa0 [ 28.509020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.509723] remove_vma+0x139/0x170 [ 28.510210] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.510813] do_vmi_munmap+0x1f1/0x2b0 [ 28.511347] mmap_region+0x1f9/0x2660 [ 28.511888] do_mmap+0x854/0xf00 [ 28.512360] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.512898] ksys_mmap_pgoff+0x3af/0x500 [ 28.513449] do_syscall_64+0x3f/0x90 [ 28.513970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.514680] [ 28.514918] The buggy address belongs to the object at ffff88800e0eb2b8 [ 28.514918] which belongs to the cache vm_area_struct of size 168 [ 28.516563] The buggy address is located 88 bytes inside of [ 28.516563] freed 168-byte region [ffff88800e0eb2b8, ffff88800e0eb360) [ 28.518085] [ 28.518320] The buggy address belongs to the physical page: [ 28.519082] page:000000000ad5df77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0eb [ 28.520344] memcg:ffff88800dbebf01 [ 28.520832] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.521569] page_type: 0xffffffff() [ 28.522086] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 28.523148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbebf01 [ 28.524192] page dumped because: kasan: bad access detected [ 28.524922] [ 28.525157] Memory state around the buggy address: [ 28.525808] ffff88800e0eb200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.526756] ffff88800e0eb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.527692] >ffff88800e0eb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.528618] ^ [ 28.529116] ffff88800e0eb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.530038] ffff88800e0eb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.530964] ================================================================== [ 28.532072] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.933832] BUG: Bad rss-counter state mm:000000007b5cc901 type:MM_FILEPAGES val:33 [ 29.934587] BUG: Bad rss-counter state mm:000000007b5cc901 type:MM_ANONPAGES val:22 [ 30.342700] BUG: Bad rss-counter state mm:000000006d327ed0 type:MM_FILEPAGES val:33 [ 30.343880] BUG: Bad rss-counter state mm:000000006d327ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41463' (ECDSA) to the list of known hosts. 2023/06/19 19:59:52 fuzzer started 2023/06/19 19:59:52 dialing manager at localhost:44161 2023/06/19 19:59:52 checking machine... 2023/06/19 19:59:52 checking revisions... [ 31.069844] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:59:52 testing simple program... [ 31.111364] cgroup: Unknown subsys name 'net' [ 31.162304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09fb8 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888008da9540 RIP=ffffffff8113038e 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 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=00007f8a6a7b56f0 CR3=000000000e848000 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=9d5f95e66558bea01f4a7219cf20ac7d XMM02=000000000011db88eff9b2d0a8fce9cb XMM03=000000000011dc582c67c8bc2e329bc3 XMM04=37d2a3c6253b67ca00000000000ae988 XMM05=dfcdbad4f1609c370000000000134af0 XMM06=832898de1402b37b0000000000133cc8 XMM07=e042d86d42eb936e00000000001241b8 XMM08=97e2a4e9ac3b4950000000000011dc58 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880164b7e20 RCX=0000000000000000 RDX=ffff88800f7a8000 RSI=0000000000000002 RDI=0000000000000002 RBP=dffffc0000000000 RSP=ffff8880164b7d88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800eda501e R13=ffffed1002c96fcb R14=0000000000000002 R15=ffff8880164b7e59 RIP=ffffffff814c03b0 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb5980f8900 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=00007fb5981b444c CR3=0000000017e7c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000