[ 23.943138] BUG: Bad rss-counter state mm:000000008f883486 type:MM_FILEPAGES val:33 [ 23.943715] BUG: Bad rss-counter state mm:000000008f883486 type:MM_ANONPAGES val:22 [ 24.089778] ================================================================== [ 24.090427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.091119] Read of size 8 at addr ffff8880096556b0 by task sshd/220 [ 24.091657] [ 24.091811] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.092414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.093099] Call Trace: [ 24.093323] [ 24.093524] dump_stack_lvl+0x91/0xf0 [ 24.093877] print_report+0xcc/0x620 [ 24.094272] ? __virt_addr_valid+0x102/0x340 [ 24.094696] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.095129] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.095557] kasan_report+0xbe/0xf0 [ 24.095891] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.096327] vma_interval_tree_remove+0xc75/0xec0 [ 24.096759] vma_prepare+0xc54/0x11a0 [ 24.097098] __split_vma+0x5af/0x950 [ 24.097429] ? __pfx___split_vma+0x10/0x10 [ 24.097801] ? find_held_lock+0x2c/0x110 [ 24.098170] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.098572] ? lock_is_held_type+0x9f/0x120 [ 24.098976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.099359] ? mtree_range_walk+0x632/0x900 [ 24.099711] ? mas_walk+0x5c7/0x7c0 [ 24.100010] do_vmi_munmap+0x1f1/0x2b0 [ 24.100321] mmap_region+0x1f9/0x2660 [ 24.100624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.100947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.101400] ? __pfx_lock_acquire+0x10/0x10 [ 24.101735] ? __pfx_mmap_region+0x10/0x10 [ 24.102069] ? security_mmap_addr+0x7d/0xa0 [ 24.102405] ? get_unmapped_area+0x1f5/0x3f0 [ 24.102759] do_mmap+0x854/0xf00 [ 24.103041] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.103352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.103708] ksys_mmap_pgoff+0x3af/0x500 [ 24.104026] do_syscall_64+0x3f/0x90 [ 24.104332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.104742] RIP: 0033:0x7f4a8bd29d82 [ 24.105028] 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 [ 24.106362] RSP: 002b:00007ffed518e818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.106948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a8bd29d82 [ 24.107479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a8b163000 [ 24.108009] RBP: 00007f4a8b163000 R08: 0000000000000009 R09: 0000000000001000 [ 24.108545] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d2b233b20 [ 24.109083] R13: 00007ffed518e830 R14: 00007ffed518e860 R15: 00007ffed518ebc0 [ 24.109624] [ 24.109807] [ 24.109946] Allocated by task 210: [ 24.110215] kasan_save_stack+0x22/0x50 [ 24.110534] kasan_set_track+0x25/0x30 [ 24.110867] __kasan_slab_alloc+0x59/0x70 [ 24.111198] kmem_cache_alloc+0x16b/0x370 [ 24.111524] vm_area_dup+0x20/0x160 [ 24.111813] __split_vma+0x170/0x950 [ 24.112110] split_vma+0xc6/0x110 [ 24.112388] mprotect_fixup+0x8d2/0xb30 [ 24.112705] do_mprotect_pkey+0x87e/0xd40 [ 24.113036] __x64_sys_mprotect+0x78/0xc0 [ 24.113365] do_syscall_64+0x3f/0x90 [ 24.113665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114071] [ 24.114210] Freed by task 210: [ 24.114457] kasan_save_stack+0x22/0x50 [ 24.114784] kasan_set_track+0x25/0x30 [ 24.115103] kasan_save_free_info+0x2b/0x50 [ 24.115439] __kasan_slab_free+0x10a/0x190 [ 24.115777] kmem_cache_free+0x10d/0x4d0 [ 24.116107] rcu_core+0x8c8/0x2860 [ 24.116393] __do_softirq+0x1b7/0x7d4 [ 24.116698] [ 24.116835] Last potentially related work creation: [ 24.117204] kasan_save_stack+0x22/0x50 [ 24.117524] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118298] remove_vma+0x139/0x170 [ 24.118588] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.118949] do_vmi_munmap+0x1f1/0x2b0 [ 24.119263] __vm_munmap+0x138/0x3a0 [ 24.119561] __x64_sys_munmap+0x59/0x80 [ 24.119876] do_syscall_64+0x3f/0x90 [ 24.120180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.120589] [ 24.120730] The buggy address belongs to the object at ffff888009655658 [ 24.120730] which belongs to the cache vm_area_struct of size 168 [ 24.121662] The buggy address is located 88 bytes inside of [ 24.121662] freed 168-byte region [ffff888009655658, ffff888009655700) [ 24.122553] [ 24.122709] The buggy address belongs to the physical page: [ 24.123128] page:00000000ef844a91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9655 [ 24.123812] memcg:ffff888009750f01 [ 24.124083] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.124531] page_type: 0xffffffff() [ 24.124819] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ac5c0 dead00000000000b [ 24.125403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009750f01 [ 24.125980] page dumped because: kasan: bad access detected [ 24.126406] [ 24.126546] Memory state around the buggy address: [ 24.126922] ffff888009655580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.127464] ffff888009655600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.128007] >ffff888009655680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.128550] ^ [ 24.128923] ffff888009655700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.129463] ffff888009655780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.130005] ================================================================== [ 24.130619] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.770807] BUG: Bad rss-counter state mm:00000000120d36a7 type:MM_FILEPAGES val:33 [ 25.772015] BUG: Bad rss-counter state mm:00000000120d36a7 type:MM_ANONPAGES val:22 [ 26.323114] BUG: Bad rss-counter state mm:000000005fa08177 type:MM_FILEPAGES val:33 [ 26.324285] BUG: Bad rss-counter state mm:000000005fa08177 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27835' (ECDSA) to the list of known hosts. 2023/06/20 13:43:39 fuzzer started 2023/06/20 13:43:39 dialing manager at localhost:36067 2023/06/20 13:43:39 checking machine... 2023/06/20 13:43:39 checking revisions... [ 26.992432] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:43:39 testing simple program... [ 27.051938] cgroup: Unknown subsys name 'net' [ 27.103347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100303aea8 RSI=ffffffff846000aa RDI=ffff8880181d75b0 RBP=ffff8880181d7580 RSP=ffff8880181d74d8 R8 =0000000000000001 R9 =ffff8880181d7528 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880181d75b0 R13=0000000000000000 R14=ffff88801923d1c0 R15=1ffff1100303af1d RIP=ffffffff813ad47f 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 00007f2b96f3e700 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=00007f8b62ee2618 CR3=0000000015b1c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038333a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f90f24755f0 CR3=000000000c486000 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=c8e8f47bf374f6960a41f0623498513e XMM02=2c67c8bc2e329bc3000000000011ab10 XMM03=fb795ef6d65770560000000000121150 XMM04=d5ca88eb3f6cec7100000000000ae988 XMM05=19e9129bd510f2350000000000130c58 XMM06=492628e9e264c437000000000012f6c8 XMM07=e042d86d42eb936e0000000000121428 XMM08=def78f0e77d34825000000000011ab70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000