[ 23.918402] BUG: Bad rss-counter state mm:000000000dabc308 type:MM_FILEPAGES val:33 [ 23.919615] BUG: Bad rss-counter state mm:000000000dabc308 type:MM_ANONPAGES val:22 [ 24.087746] ================================================================== [ 24.088863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.089918] Read of size 8 at addr ffff88800da97880 by task sshd/219 [ 24.090803] [ 24.091023] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.091836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.092867] Call Trace: [ 24.093244] [ 24.093515] dump_stack_lvl+0x91/0xf0 [ 24.094006] print_report+0xcc/0x620 [ 24.094507] ? __virt_addr_valid+0x102/0x340 [ 24.095083] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.095798] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.096473] kasan_report+0xbe/0xf0 [ 24.096949] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.097594] vma_interval_tree_remove+0xc75/0xec0 [ 24.098212] vma_prepare+0xc54/0x11a0 [ 24.098805] __split_vma+0x5af/0x950 [ 24.099295] ? __pfx___split_vma+0x10/0x10 [ 24.099801] ? find_held_lock+0x2c/0x110 [ 24.100348] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.101018] ? lock_is_held_type+0x9f/0x120 [ 24.101600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.102264] ? mtree_range_walk+0x632/0x900 [ 24.102867] ? mas_walk+0x5c7/0x7c0 [ 24.103353] do_vmi_munmap+0x1f1/0x2b0 [ 24.103951] mmap_region+0x1f9/0x2660 [ 24.104455] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.104987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.105707] ? __pfx_lock_acquire+0x10/0x10 [ 24.106305] ? __pfx_mmap_region+0x10/0x10 [ 24.106891] ? security_mmap_addr+0x7d/0xa0 [ 24.107460] ? get_unmapped_area+0x1f5/0x3f0 [ 24.108034] do_mmap+0x854/0xf00 [ 24.108512] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.109099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.109704] ksys_mmap_pgoff+0x3af/0x500 [ 24.110224] do_syscall_64+0x3f/0x90 [ 24.110709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.111399] RIP: 0033:0x7fc1bb902d82 [ 24.111981] 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 [ 24.114197] RSP: 002b:00007fff3af29628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.115236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1bb902d82 [ 24.116103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1bad3c000 [ 24.117025] RBP: 00007fc1bad3c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.117918] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fdcf6a980 [ 24.118767] R13: 00007fff3af29640 R14: 00007fff3af29670 R15: 00007fff3af299d0 [ 24.119702] [ 24.120035] [ 24.120287] Allocated by task 212: [ 24.120742] kasan_save_stack+0x22/0x50 [ 24.121264] kasan_set_track+0x25/0x30 [ 24.121795] __kasan_slab_alloc+0x59/0x70 [ 24.122369] kmem_cache_alloc+0x16b/0x370 [ 24.122945] vm_area_dup+0x20/0x160 [ 24.123405] __split_vma+0x170/0x950 [ 24.123847] split_vma+0xc6/0x110 [ 24.124271] mprotect_fixup+0x8d2/0xb30 [ 24.124833] do_mprotect_pkey+0x87e/0xd40 [ 24.125449] __x64_sys_mprotect+0x78/0xc0 [ 24.126008] do_syscall_64+0x3f/0x90 [ 24.126497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.127185] [ 24.127404] Freed by task 212: [ 24.127854] kasan_save_stack+0x22/0x50 [ 24.128408] kasan_set_track+0x25/0x30 [ 24.128919] kasan_save_free_info+0x2b/0x50 [ 24.129441] __kasan_slab_free+0x10a/0x190 [ 24.129989] kmem_cache_free+0x10d/0x4d0 [ 24.130609] rcu_core+0x8c8/0x2860 [ 24.131147] __do_softirq+0x1b7/0x7d4 [ 24.131643] [ 24.131866] Last potentially related work creation: [ 24.132490] kasan_save_stack+0x22/0x50 [ 24.133071] __kasan_record_aux_stack+0x8e/0xa0 [ 24.133721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.134370] remove_vma+0x139/0x170 [ 24.134825] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.135388] do_vmi_munmap+0x1f1/0x2b0 [ 24.135988] __vm_munmap+0x138/0x3a0 [ 24.136470] __x64_sys_munmap+0x59/0x80 [ 24.137019] do_syscall_64+0x3f/0x90 [ 24.137505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.138185] [ 24.138426] Second to last potentially related work creation: [ 24.139218] kasan_save_stack+0x22/0x50 [ 24.139738] __kasan_record_aux_stack+0x8e/0xa0 [ 24.140339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.141102] remove_vma+0x139/0x170 [ 24.141637] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.142236] do_vmi_munmap+0x1f1/0x2b0 [ 24.142734] mmap_region+0x1f9/0x2660 [ 24.143246] do_mmap+0x854/0xf00 [ 24.143696] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.144258] ksys_mmap_pgoff+0x3af/0x500 [ 24.144821] do_syscall_64+0x3f/0x90 [ 24.145308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145954] [ 24.146171] The buggy address belongs to the object at ffff88800da97828 [ 24.146171] which belongs to the cache vm_area_struct of size 168 [ 24.147746] The buggy address is located 88 bytes inside of [ 24.147746] freed 168-byte region [ffff88800da97828, ffff88800da978d0) [ 24.149242] [ 24.149501] The buggy address belongs to the physical page: [ 24.150197] page:00000000a8e025e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda97 [ 24.151342] memcg:ffff88800deac501 [ 24.151793] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.152517] page_type: 0xffffffff() [ 24.152996] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b700 dead000000000006 [ 24.153918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deac501 [ 24.154948] page dumped because: kasan: bad access detected [ 24.155648] [ 24.155868] Memory state around the buggy address: [ 24.156489] ffff88800da97780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.157458] ffff88800da97800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.158338] >ffff88800da97880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.159188] ^ [ 24.159632] ffff88800da97900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.160578] ffff88800da97980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.161473] ================================================================== [ 24.162590] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.601998] BUG: Bad rss-counter state mm:0000000045f0e9c1 type:MM_FILEPAGES val:33 [ 25.603078] BUG: Bad rss-counter state mm:0000000045f0e9c1 type:MM_ANONPAGES val:22 [ 26.048742] BUG: Bad rss-counter state mm:0000000056ab1928 type:MM_FILEPAGES val:33 [ 26.049881] BUG: Bad rss-counter state mm:0000000056ab1928 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36942' (ECDSA) to the list of known hosts. 2023/06/20 13:30:18 fuzzer started 2023/06/20 13:30:18 dialing manager at localhost:36067 2023/06/20 13:30:18 checking machine... 2023/06/20 13:30:18 checking revisions... [ 26.792178] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:30:18 testing simple program... [ 26.847356] cgroup: Unknown subsys name 'net' [ 26.895897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f3d9b54b900 CR3=000000000f7fe000 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=af7e89dd0411f48ed54a3f38459f3615 XMM02=ec2efd57dc4c00df000000000011a550 XMM03=af5e85aa77623cc3000000000011a620 XMM04=72124c1297cbab0600000000000ae988 XMM05=dfcdbad4f1609c370000000000131ee8 XMM06=26012f734cb5b8d00000000000130958 XMM07=e042d86d42eb936e00000000001212e0 XMM08=af5e85aa77623cc3000000000011a620 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff8880165d3a74 RBP=0000000000000000 RSP=ffff8880168677d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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 00007f4534bfe900 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=00007ffffb67d000 CR3=000000000db94000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000