[ 24.100765] BUG: Bad rss-counter state mm:00000000627615c8 type:MM_FILEPAGES val:33 [ 24.101921] BUG: Bad rss-counter state mm:00000000627615c8 type:MM_ANONPAGES val:22 [ 24.139350] ================================================================== [ 24.140069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.140817] Read of size 8 at addr ffff888019b48798 by task sshd/219 [ 24.141430] [ 24.141602] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.142290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.143066] Call Trace: [ 24.143322] [ 24.143599] dump_stack_lvl+0x91/0xf0 [ 24.144031] print_report+0xcc/0x620 [ 24.144559] ? __virt_addr_valid+0x102/0x340 [ 24.145020] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.145524] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146031] kasan_report+0xbe/0xf0 [ 24.146423] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146933] vma_interval_tree_remove+0xc75/0xec0 [ 24.147428] vma_prepare+0xc54/0x11a0 [ 24.147851] __split_vma+0x5af/0x950 [ 24.148233] ? __pfx___split_vma+0x10/0x10 [ 24.148673] ? find_held_lock+0x2c/0x110 [ 24.149110] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.149584] ? lock_is_held_type+0x9f/0x120 [ 24.150033] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.150545] ? mtree_range_walk+0x632/0x900 [ 24.151008] ? mas_walk+0x5c7/0x7c0 [ 24.151411] do_vmi_munmap+0x1f1/0x2b0 [ 24.151845] mmap_region+0x1f9/0x2660 [ 24.152245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.152670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.153268] ? __pfx_lock_acquire+0x10/0x10 [ 24.153722] ? __pfx_mmap_region+0x10/0x10 [ 24.154164] ? security_mmap_addr+0x7d/0xa0 [ 24.154613] ? get_unmapped_area+0x1f5/0x3f0 [ 24.155065] do_mmap+0x854/0xf00 [ 24.155427] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.155856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.156326] ksys_mmap_pgoff+0x3af/0x500 [ 24.156766] do_syscall_64+0x3f/0x90 [ 24.157161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.157688] RIP: 0033:0x7fa653e62d82 [ 24.158057] 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 [ 24.159836] RSP: 002b:00007ffcb744fe98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.160584] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa653e62d82 [ 24.161285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa65329c000 [ 24.161979] RBP: 00007fa65329c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.162676] R10: 0000000000000812 R11: 0000000000000206 R12: 000056512d4c0ec0 [ 24.163380] R13: 00007ffcb744feb0 R14: 00007ffcb744fee0 R15: 00007ffcb7450240 [ 24.164094] [ 24.164334] [ 24.164510] Allocated by task 212: [ 24.164867] kasan_save_stack+0x22/0x50 [ 24.165281] kasan_set_track+0x25/0x30 [ 24.165690] __kasan_slab_alloc+0x59/0x70 [ 24.166117] kmem_cache_alloc+0x16b/0x370 [ 24.166542] vm_area_dup+0x20/0x160 [ 24.166914] __split_vma+0x170/0x950 [ 24.167295] split_vma+0xc6/0x110 [ 24.167649] mprotect_fixup+0x8d2/0xb30 [ 24.168085] do_mprotect_pkey+0x87e/0xd40 [ 24.168510] __x64_sys_mprotect+0x78/0xc0 [ 24.168934] do_syscall_64+0x3f/0x90 [ 24.169326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.169857] [ 24.170033] Freed by task 13: [ 24.170344] kasan_save_stack+0x22/0x50 [ 24.170760] kasan_set_track+0x25/0x30 [ 24.171169] kasan_save_free_info+0x2b/0x50 [ 24.171606] __kasan_slab_free+0x10a/0x190 [ 24.172045] kmem_cache_free+0x10d/0x4d0 [ 24.172466] rcu_core+0x8c8/0x2860 [ 24.172829] __do_softirq+0x1b7/0x7d4 [ 24.173223] [ 24.173398] Last potentially related work creation: [ 24.173875] kasan_save_stack+0x22/0x50 [ 24.174288] __kasan_record_aux_stack+0x8e/0xa0 [ 24.174761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.175286] remove_vma+0x139/0x170 [ 24.175661] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.176130] do_vmi_munmap+0x1f1/0x2b0 [ 24.176532] __vm_munmap+0x138/0x3a0 [ 24.176918] __x64_sys_munmap+0x59/0x80 [ 24.177322] do_syscall_64+0x3f/0x90 [ 24.177710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.178240] [ 24.178419] Second to last potentially related work creation: [ 24.178986] kasan_save_stack+0x22/0x50 [ 24.179401] __kasan_record_aux_stack+0x8e/0xa0 [ 24.179872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.180404] remove_vma+0x139/0x170 [ 24.180773] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.181232] do_vmi_munmap+0x1f1/0x2b0 [ 24.181638] mmap_region+0x1f9/0x2660 [ 24.182030] do_mmap+0x854/0xf00 [ 24.182383] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.182788] ksys_mmap_pgoff+0x3af/0x500 [ 24.183202] do_syscall_64+0x3f/0x90 [ 24.183593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.184126] [ 24.184306] The buggy address belongs to the object at ffff888019b48740 [ 24.184306] which belongs to the cache vm_area_struct of size 168 [ 24.185513] The buggy address is located 88 bytes inside of [ 24.185513] freed 168-byte region [ffff888019b48740, ffff888019b487e8) [ 24.186663] [ 24.186841] The buggy address belongs to the physical page: [ 24.187391] page:0000000028c760d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b48 [ 24.188313] memcg:ffff888017d66f01 [ 24.188665] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.189200] page_type: 0xffffffff() [ 24.189577] raw: 0100000000000200 ffff8880087a0c80 ffffea000066ea40 dead000000000004 [ 24.190342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d66f01 [ 24.191085] page dumped because: kasan: bad access detected [ 24.191639] [ 24.191824] Memory state around the buggy address: [ 24.192306] ffff888019b48680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.193004] ffff888019b48700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.193708] >ffff888019b48780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.194411] ^ [ 24.194818] ffff888019b48800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.195520] ffff888019b48880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.196228] ================================================================== [ 24.197305] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.140439] BUG: Bad rss-counter state mm:00000000e301b423 type:MM_FILEPAGES val:33 [ 26.141605] BUG: Bad rss-counter state mm:00000000e301b423 type:MM_ANONPAGES val:22 [ 26.584418] BUG: Bad rss-counter state mm:000000005d95f0ac type:MM_FILEPAGES val:33 [ 26.585470] BUG: Bad rss-counter state mm:000000005d95f0ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39996' (ECDSA) to the list of known hosts. 2023/06/21 00:59:38 fuzzer started 2023/06/21 00:59:38 dialing manager at localhost:36067 2023/06/21 00:59:38 checking machine... 2023/06/21 00:59:38 checking revisions... [ 27.345222] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:59:38 testing simple program... [ 27.397180] cgroup: Unknown subsys name 'net' [ 27.437570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d9fa20 RCX=0000000000000001 RDX=1ffff110011b3f45 RSI=ffffffff813782f8 RDI=ffff888008d9fa28 RBP=0000000000000006 RSP=ffff888008d9f938 R8 =0000000000000001 R9 =ffff888008d9f998 R10=0000000000038001 R11=00000000000244d5 R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800961f480 RIP=ffffffff813ad4be 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 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=00007f3b3189d618 CR3=000000000e734000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8451105e RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff1100d9e1359 RSI=ffffffff8451105e RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =ffffffff860a1444 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880146f1b40 R15=ffff88800db0aa00 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007f3b312e6900 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=00007ffc80733000 CR3=000000000e734000 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