[ 27.789989] BUG: Bad rss-counter state mm:0000000001e4217c type:MM_FILEPAGES val:33 [ 27.791183] BUG: Bad rss-counter state mm:0000000001e4217c type:MM_ANONPAGES val:22 [ 27.832898] ================================================================== [ 27.833826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.834788] Read of size 8 at addr ffff88800dc624e0 by task sshd/218 [ 27.835542] [ 27.835757] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.836620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.837586] Call Trace: [ 27.837907] [ 27.838204] dump_stack_lvl+0x91/0xf0 [ 27.838699] print_report+0xcc/0x620 [ 27.839177] ? __virt_addr_valid+0x102/0x340 [ 27.839745] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.840367] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.840983] kasan_report+0xbe/0xf0 [ 27.841457] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.842089] vma_interval_tree_remove+0xc75/0xec0 [ 27.842685] vma_prepare+0xc54/0x11a0 [ 27.843166] __split_vma+0x5af/0x950 [ 27.843637] ? __pfx___split_vma+0x10/0x10 [ 27.844166] ? find_held_lock+0x2c/0x110 [ 27.844688] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.845247] ? lock_is_held_type+0x9f/0x120 [ 27.845793] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.846426] ? mtree_range_walk+0x632/0x900 [ 27.846982] ? mas_walk+0x5c7/0x7c0 [ 27.847462] do_vmi_munmap+0x1f1/0x2b0 [ 27.847964] mmap_region+0x1f9/0x2660 [ 27.848443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.848961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.849672] ? __pfx_lock_acquire+0x10/0x10 [ 27.850218] ? __pfx_mmap_region+0x10/0x10 [ 27.850751] ? security_mmap_addr+0x7d/0xa0 [ 27.851280] ? get_unmapped_area+0x1f5/0x3f0 [ 27.851838] do_mmap+0x854/0xf00 [ 27.852272] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.852766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.853330] ksys_mmap_pgoff+0x3af/0x500 [ 27.853839] do_syscall_64+0x3f/0x90 [ 27.854338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.854992] RIP: 0033:0x7f4666cd2d82 [ 27.855462] 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 [ 27.857598] RSP: 002b:00007ffd993a3c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.858520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4666cd2d82 [ 27.859376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f466610c000 [ 27.860225] RBP: 00007f466610c000 R08: 0000000000000009 R09: 0000000000001000 [ 27.861080] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561baa0b6ec0 [ 27.861925] R13: 00007ffd993a3c90 R14: 00007ffd993a3cc0 R15: 00007ffd993a4020 [ 27.862792] [ 27.863086] [ 27.863299] Allocated by task 211: [ 27.863730] kasan_save_stack+0x22/0x50 [ 27.864242] kasan_set_track+0x25/0x30 [ 27.864746] __kasan_slab_alloc+0x59/0x70 [ 27.865268] kmem_cache_alloc+0x16b/0x370 [ 27.865783] vm_area_dup+0x20/0x160 [ 27.866250] __split_vma+0x170/0x950 [ 27.866725] split_vma+0xc6/0x110 [ 27.867163] mprotect_fixup+0x8d2/0xb30 [ 27.867660] do_mprotect_pkey+0x87e/0xd40 [ 27.868189] __x64_sys_mprotect+0x78/0xc0 [ 27.868720] do_syscall_64+0x3f/0x90 [ 27.869202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.869842] [ 27.870067] Freed by task 211: [ 27.870459] kasan_save_stack+0x22/0x50 [ 27.870970] kasan_set_track+0x25/0x30 [ 27.871469] kasan_save_free_info+0x2b/0x50 [ 27.872017] __kasan_slab_free+0x10a/0x190 [ 27.872557] kmem_cache_free+0x10d/0x4d0 [ 27.873073] rcu_core+0x8c8/0x2860 [ 27.873519] __do_softirq+0x1b7/0x7d4 [ 27.874018] [ 27.874239] Last potentially related work creation: [ 27.874834] kasan_save_stack+0x22/0x50 [ 27.875344] __kasan_record_aux_stack+0x8e/0xa0 [ 27.875915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.876560] remove_vma+0x139/0x170 [ 27.877013] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.877571] do_vmi_munmap+0x1f1/0x2b0 [ 27.878067] __vm_munmap+0x138/0x3a0 [ 27.878540] __x64_sys_munmap+0x59/0x80 [ 27.879043] do_syscall_64+0x3f/0x90 [ 27.879515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.880159] [ 27.880376] Second to last potentially related work creation: [ 27.881062] kasan_save_stack+0x22/0x50 [ 27.881567] __kasan_record_aux_stack+0x8e/0xa0 [ 27.882154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.882793] remove_vma+0x139/0x170 [ 27.883245] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.883808] do_vmi_munmap+0x1f1/0x2b0 [ 27.884298] mmap_region+0x1f9/0x2660 [ 27.884781] do_mmap+0x854/0xf00 [ 27.885220] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.885708] ksys_mmap_pgoff+0x3af/0x500 [ 27.886230] do_syscall_64+0x3f/0x90 [ 27.886705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.887347] [ 27.887566] The buggy address belongs to the object at ffff88800dc62488 [ 27.887566] which belongs to the cache vm_area_struct of size 168 [ 27.889027] The buggy address is located 88 bytes inside of [ 27.889027] freed 168-byte region [ffff88800dc62488, ffff88800dc62530) [ 27.890451] [ 27.890668] The buggy address belongs to the physical page: [ 27.891323] page:00000000f1995eb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc62 [ 27.892414] memcg:ffff88800dc4ce01 [ 27.892838] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.893478] page_type: 0xffffffff() [ 27.893933] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 27.894859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc4ce01 [ 27.895764] page dumped because: kasan: bad access detected [ 27.896422] [ 27.896639] Memory state around the buggy address: [ 27.897217] ffff88800dc62380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.898080] ffff88800dc62400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 27.898945] >ffff88800dc62480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.899796] ^ [ 27.900550] ffff88800dc62500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 27.901422] ffff88800dc62580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.902285] ================================================================== [ 27.903645] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.711094] BUG: Bad rss-counter state mm:00000000ab73d823 type:MM_FILEPAGES val:33 [ 29.712223] BUG: Bad rss-counter state mm:00000000ab73d823 type:MM_ANONPAGES val:22 [ 30.089309] BUG: Bad rss-counter state mm:00000000ee094223 type:MM_FILEPAGES val:33 [ 30.090340] BUG: Bad rss-counter state mm:00000000ee094223 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5731' (ECDSA) to the list of known hosts. 2023/06/20 06:28:50 fuzzer started 2023/06/20 06:28:50 dialing manager at localhost:44161 2023/06/20 06:28:50 checking machine... 2023/06/20 06:28:50 checking revisions... [ 30.741434] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:28:50 testing simple program... [ 30.800708] cgroup: Unknown subsys name 'net' [ 30.836537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:46 Registers: info registers vcpu 0 RAX=ffffffff8173f6f0 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001c08ed9 RSI=ffffffff8173f6f0 RDI=ffff88800e047738 RBP=ffff88800e047708 RSP=ffff88800e047668 R8 =0000000000000001 R9 =ffff88800e0476b0 R10=0000000000038001 R11=00000000000b3eeb R12=ffff88800e047738 R13=0000000000000000 R14=ffff888016af8000 R15=ffff8880084c6140 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f4b0e0cd900 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=00007f4b0e0ac020 CR3=000000000e9f8000 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=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 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=00007f89cbfb2690 CR3=0000000018336000 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=2030353a38323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000