[ 31.125306] BUG: Bad rss-counter state mm:00000000df097b0c type:MM_FILEPAGES val:33 [ 31.126554] BUG: Bad rss-counter state mm:00000000df097b0c type:MM_ANONPAGES val:22 [ 31.186605] ================================================================== [ 31.187571] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.188563] Read of size 8 at addr ffff88800e0f4a50 by task sshd/226 [ 31.189531] [ 31.189771] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.190704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.191752] Call Trace: [ 31.192104] [ 31.192397] dump_stack_lvl+0x91/0xf0 [ 31.192961] print_report+0xcc/0x620 [ 31.193477] ? __virt_addr_valid+0x102/0x340 [ 31.194099] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194755] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195420] kasan_report+0xbe/0xf0 [ 31.195943] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196596] vma_interval_tree_remove+0xc75/0xec0 [ 31.197269] vma_prepare+0xc54/0x11a0 [ 31.197792] __split_vma+0x5af/0x950 [ 31.198306] ? __pfx___split_vma+0x10/0x10 [ 31.198864] ? find_held_lock+0x2c/0x110 [ 31.199432] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.200046] ? lock_is_held_type+0x9f/0x120 [ 31.200629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.201316] ? mtree_range_walk+0x632/0x900 [ 31.201910] ? mas_walk+0x5c7/0x7c0 [ 31.202428] do_vmi_munmap+0x1f1/0x2b0 [ 31.202963] mmap_region+0x1f9/0x2660 [ 31.203489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.204036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.204839] ? __pfx_lock_acquire+0x10/0x10 [ 31.205431] ? __pfx_mmap_region+0x10/0x10 [ 31.205993] ? security_mmap_addr+0x7d/0xa0 [ 31.206569] ? get_unmapped_area+0x1f5/0x3f0 [ 31.207168] do_mmap+0x854/0xf00 [ 31.207646] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.208181] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.208803] ksys_mmap_pgoff+0x3af/0x500 [ 31.209356] do_syscall_64+0x3f/0x90 [ 31.209891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.210582] RIP: 0033:0x7fac81f02d82 [ 31.211073] 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 [ 31.213394] RSP: 002b:00007ffde547dd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.214389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac81f02d82 [ 31.215310] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac8133c000 [ 31.216230] RBP: 00007fac8133c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.217161] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b4ad90ec0 [ 31.218089] R13: 00007ffde547dd70 R14: 00007ffde547dda0 R15: 00007ffde547e100 [ 31.219038] [ 31.219338] [ 31.219581] Allocated by task 213: [ 31.220054] kasan_save_stack+0x22/0x50 [ 31.220585] kasan_set_track+0x25/0x30 [ 31.221100] __kasan_slab_alloc+0x59/0x70 [ 31.221656] kmem_cache_alloc+0x16b/0x370 [ 31.222214] vm_area_dup+0x20/0x160 [ 31.222716] __split_vma+0x170/0x950 [ 31.223227] split_vma+0xc6/0x110 [ 31.223709] mprotect_fixup+0x8d2/0xb30 [ 31.224270] do_mprotect_pkey+0x87e/0xd40 [ 31.224902] __x64_sys_mprotect+0x78/0xc0 [ 31.225550] do_syscall_64+0x3f/0x90 [ 31.226140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226923] [ 31.227194] Freed by task 213: [ 31.227675] kasan_save_stack+0x22/0x50 [ 31.228282] kasan_set_track+0x25/0x30 [ 31.228913] kasan_save_free_info+0x2b/0x50 [ 31.229561] __kasan_slab_free+0x10a/0x190 [ 31.230208] kmem_cache_free+0x10d/0x4d0 [ 31.230829] rcu_core+0x8c8/0x2860 [ 31.231380] __do_softirq+0x1b7/0x7d4 [ 31.231962] [ 31.232229] Last potentially related work creation: [ 31.232951] kasan_save_stack+0x22/0x50 [ 31.233543] __kasan_record_aux_stack+0x8e/0xa0 [ 31.234238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.235010] remove_vma+0x139/0x170 [ 31.235560] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.236246] do_vmi_munmap+0x1f1/0x2b0 [ 31.236865] __vm_munmap+0x138/0x3a0 [ 31.237446] __x64_sys_munmap+0x59/0x80 [ 31.238015] do_syscall_64+0x3f/0x90 [ 31.238496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239139] [ 31.239356] Second to last potentially related work creation: [ 31.240043] kasan_save_stack+0x22/0x50 [ 31.240553] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241779] remove_vma+0x139/0x170 [ 31.242233] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242787] do_vmi_munmap+0x1f1/0x2b0 [ 31.243274] mmap_region+0x1f9/0x2660 [ 31.243758] do_mmap+0x854/0xf00 [ 31.244208] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.244713] ksys_mmap_pgoff+0x3af/0x500 [ 31.245237] do_syscall_64+0x3f/0x90 [ 31.245718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246366] [ 31.246583] The buggy address belongs to the object at ffff88800e0f49f8 [ 31.246583] which belongs to the cache vm_area_struct of size 168 [ 31.248106] The buggy address is located 88 bytes inside of [ 31.248106] freed 168-byte region [ffff88800e0f49f8, ffff88800e0f4aa0) [ 31.249529] [ 31.249744] The buggy address belongs to the physical page: [ 31.250402] page:00000000afe2a874 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f4 [ 31.251482] memcg:ffff88800dbc1b01 [ 31.251910] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.252546] page_type: 0xffffffff() [ 31.253007] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373100 dead000000000006 [ 31.253924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbc1b01 [ 31.254832] page dumped because: kasan: bad access detected [ 31.255486] [ 31.255703] Memory state around the buggy address: [ 31.256277] ffff88800e0f4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.257155] ffff88800e0f4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.258009] >ffff88800e0f4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258859] ^ [ 31.259553] ffff88800e0f4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.260409] ffff88800e0f4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261272] ================================================================== [ 31.262277] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.229456] BUG: Bad rss-counter state mm:00000000c5848e97 type:MM_FILEPAGES val:33 [ 33.231017] BUG: Bad rss-counter state mm:00000000c5848e97 type:MM_ANONPAGES val:22 [ 33.716737] BUG: Bad rss-counter state mm:0000000074fae51a type:MM_FILEPAGES val:33 [ 33.717690] BUG: Bad rss-counter state mm:0000000074fae51a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32668' (ECDSA) to the list of known hosts. 2023/06/21 00:48:08 fuzzer started 2023/06/21 00:48:08 dialing manager at localhost:36067 2023/06/21 00:48:08 checking machine... 2023/06/21 00:48:08 checking revisions... [ 34.451336] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:48:09 testing simple program... [ 34.490419] cgroup: Unknown subsys name 'net' [ 34.527659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:08 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff88801475fd28 RSP=ffff88801475fc60 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000080 R11=0000000000000000 R12=0000000000000015 R13=ffff88801475fd60 R14=0000000000000015 R15=ffffc9000068d498 RIP=ffffffff815a72aa RFL=00000246 [---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 00007f1adcca5900 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=00007f1adc1c4000 CR3=000000000e848000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=226ddd638795b32f00000000000ae988 XMM05=08e7169f5f7b9c2f0000000000133d78 XMM06=6860aeb314f8829d00000000001328c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8180effd RDX=dffffc0000000000 RSI=ffffffff8180effe RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff86138e90 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff8113071f 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 00007ff611b73900 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=00007ffcde885000 CR3=000000000f038000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000