[ 45.360090] BUG: Bad rss-counter state mm:000000001c9d1fa1 type:MM_FILEPAGES val:33 [ 45.361308] BUG: Bad rss-counter state mm:000000001c9d1fa1 type:MM_ANONPAGES val:22 [ 45.404713] ================================================================== [ 45.405982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.407113] Read of size 8 at addr ffff88800fe4e228 by task sshd/219 [ 45.407923] [ 45.408151] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.409088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.410107] Call Trace: [ 45.410444] [ 45.410750] dump_stack_lvl+0x91/0xf0 [ 45.411266] print_report+0xcc/0x620 [ 45.411773] ? __virt_addr_valid+0x102/0x340 [ 45.412364] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.413033] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.413685] kasan_report+0xbe/0xf0 [ 45.414182] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.414834] vma_interval_tree_remove+0xc75/0xec0 [ 45.415469] vma_prepare+0xc54/0x11a0 [ 45.415972] __split_vma+0x5af/0x950 [ 45.416467] ? __pfx___split_vma+0x10/0x10 [ 45.417037] ? find_held_lock+0x2c/0x110 [ 45.417580] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.418164] ? lock_is_held_type+0x9f/0x120 [ 45.418733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.419368] ? mtree_range_walk+0x632/0x900 [ 45.419940] ? mas_walk+0x5c7/0x7c0 [ 45.420441] do_vmi_munmap+0x1f1/0x2b0 [ 45.420968] mmap_region+0x1f9/0x2660 [ 45.421476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.422008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.422761] ? __pfx_lock_acquire+0x10/0x10 [ 45.423313] ? __pfx_mmap_region+0x10/0x10 [ 45.423872] ? security_mmap_addr+0x7d/0xa0 [ 45.424427] ? get_unmapped_area+0x1f5/0x3f0 [ 45.425022] do_mmap+0x854/0xf00 [ 45.425484] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.426011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.426604] ksys_mmap_pgoff+0x3af/0x500 [ 45.427135] do_syscall_64+0x3f/0x90 [ 45.427643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.428324] RIP: 0033:0x7f573d692d82 [ 45.428808] 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 [ 45.431088] RSP: 002b:00007ffcf12b1db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.432041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f573d692d82 [ 45.432942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f573cacc000 [ 45.433836] RBP: 00007f573cacc000 R08: 0000000000000009 R09: 0000000000001000 [ 45.434725] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a688fc5ec0 [ 45.435622] R13: 00007ffcf12b1dd0 R14: 00007ffcf12b1e00 R15: 00007ffcf12b2160 [ 45.436517] [ 45.436826] [ 45.437069] Allocated by task 212: [ 45.437523] kasan_save_stack+0x22/0x50 [ 45.438062] kasan_set_track+0x25/0x30 [ 45.438586] __kasan_slab_alloc+0x59/0x70 [ 45.439136] kmem_cache_alloc+0x16b/0x370 [ 45.439676] vm_area_dup+0x20/0x160 [ 45.440146] __split_vma+0x170/0x950 [ 45.440641] split_vma+0xc6/0x110 [ 45.441112] mprotect_fixup+0x8d2/0xb30 [ 45.441645] do_mprotect_pkey+0x87e/0xd40 [ 45.442194] __x64_sys_mprotect+0x78/0xc0 [ 45.442738] do_syscall_64+0x3f/0x90 [ 45.443244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.443919] [ 45.444142] Freed by task 212: [ 45.444554] kasan_save_stack+0x22/0x50 [ 45.445099] kasan_set_track+0x25/0x30 [ 45.445628] kasan_save_free_info+0x2b/0x50 [ 45.446286] __kasan_slab_free+0x10a/0x190 [ 45.446845] kmem_cache_free+0x10d/0x4d0 [ 45.447380] rcu_core+0x8c8/0x2860 [ 45.447852] __do_softirq+0x1b7/0x7d4 [ 45.448356] [ 45.448587] Last potentially related work creation: [ 45.449202] kasan_save_stack+0x22/0x50 [ 45.449732] __kasan_record_aux_stack+0x8e/0xa0 [ 45.450329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.451005] remove_vma+0x139/0x170 [ 45.451482] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.452068] do_vmi_munmap+0x1f1/0x2b0 [ 45.452582] __vm_munmap+0x138/0x3a0 [ 45.453087] __x64_sys_munmap+0x59/0x80 [ 45.453608] do_syscall_64+0x3f/0x90 [ 45.454108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.454783] [ 45.455013] The buggy address belongs to the object at ffff88800fe4e1d0 [ 45.455013] which belongs to the cache vm_area_struct of size 168 [ 45.456564] The buggy address is located 88 bytes inside of [ 45.456564] freed 168-byte region [ffff88800fe4e1d0, ffff88800fe4e278) [ 45.458048] [ 45.458273] The buggy address belongs to the physical page: [ 45.458967] page:00000000adeac1dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe4e [ 45.460110] memcg:ffff88800efb2701 [ 45.460560] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.461253] page_type: 0xffffffff() [ 45.461732] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.462704] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efb2701 [ 45.463678] page dumped because: kasan: bad access detected [ 45.464384] [ 45.464609] Memory state around the buggy address: [ 45.465220] ffff88800fe4e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.466115] ffff88800fe4e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.467011] >ffff88800fe4e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.467903] ^ [ 45.468484] ffff88800fe4e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 45.469403] ffff88800fe4e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 45.470290] ================================================================== [ 45.471336] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 47.490568] BUG: Bad rss-counter state mm:000000001d811eb8 type:MM_FILEPAGES val:33 [ 47.491755] BUG: Bad rss-counter state mm:000000001d811eb8 type:MM_ANONPAGES val:22 [ 47.904826] BUG: Bad rss-counter state mm:00000000faa0b512 type:MM_FILEPAGES val:33 [ 47.906086] BUG: Bad rss-counter state mm:00000000faa0b512 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54953' (ECDSA) to the list of known hosts. 2023/06/19 16:09:59 fuzzer started 2023/06/19 16:10:00 dialing manager at localhost:44161 2023/06/19 16:10:00 checking machine... 2023/06/19 16:10:00 checking revisions... [ 48.612856] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:10:00 testing simple program... [ 48.664797] cgroup: Unknown subsys name 'net' [ 48.720811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:09:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800badbe00 RCX=0000000000000000 RDX=ffffed10018dcf85 RSI=0000000000000008 RDI=ffff88800badbe04 RBP=1ffff110018dcf85 RSP=ffff88800c6e7c20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f8d7800 R13=ffff88800f8d7808 R14=ffffffff87f94980 R15=ffff88800bad8000 RIP=ffffffff812e0010 RFL=00000212 [----A--] 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 00007f9d807aa900 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=00007ffc3e3bcff8 CR3=000000000f1f0000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ddc343 RBX=ffff88800eee19e8 RCX=1ffff11001d043b6 RDX=dffffc0000000000 RSI=ffff88800eb331d0 RDI=ffff88800eee1a18 RBP=ffff8880094ec668 RSP=ffff888006ac79c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800eb331c0 R13=0000000000000000 R14=ffff88801393a508 R15=ffff88801393a4c0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f2f7c81d900 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=00007f2f7bc2e860 CR3=000000000deaa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=eba11bcef28612ee00000000000ae988 XMM05=30140a79be6abe2e0000000000133f28 XMM06=806171799158d96700000000001326d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000