[ 27.604082] BUG: Bad rss-counter state mm:00000000c1224687 type:MM_FILEPAGES val:33 [ 27.605131] BUG: Bad rss-counter state mm:00000000c1224687 type:MM_ANONPAGES val:22 [ 27.765229] ================================================================== [ 27.766138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.767088] Read of size 8 at addr ffff88800cbd9ed8 by task sshd/220 [ 27.767906] [ 27.768240] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.769112] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.770082] Call Trace: [ 27.770428] [ 27.770712] dump_stack_lvl+0x91/0xf0 [ 27.771209] print_report+0xcc/0x620 [ 27.771723] ? __virt_addr_valid+0x102/0x340 [ 27.772281] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.772908] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.773532] kasan_report+0xbe/0xf0 [ 27.774006] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.774628] vma_interval_tree_remove+0xc75/0xec0 [ 27.775233] vma_prepare+0xc54/0x11a0 [ 27.775721] __split_vma+0x5af/0x950 [ 27.776203] ? __pfx___split_vma+0x10/0x10 [ 27.776730] ? find_held_lock+0x2c/0x110 [ 27.777251] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.777814] ? lock_is_held_type+0x9f/0x120 [ 27.778359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.778966] ? mtree_range_walk+0x632/0x900 [ 27.779523] ? mas_walk+0x5c7/0x7c0 [ 27.780000] do_vmi_munmap+0x1f1/0x2b0 [ 27.780576] mmap_region+0x1f9/0x2660 [ 27.781067] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.781581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.782289] ? __pfx_lock_acquire+0x10/0x10 [ 27.782817] ? __pfx_mmap_region+0x10/0x10 [ 27.783346] ? security_mmap_addr+0x7d/0xa0 [ 27.783887] ? get_unmapped_area+0x1f5/0x3f0 [ 27.784439] do_mmap+0x854/0xf00 [ 27.784883] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.785387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.785956] ksys_mmap_pgoff+0x3af/0x500 [ 27.786471] do_syscall_64+0x3f/0x90 [ 27.786956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.787609] RIP: 0033:0x7fa77a38cd82 [ 27.788067] 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 [ 27.790211] RSP: 002b:00007ffe9ee05918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.791127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa77a38cd82 [ 27.791997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7797c6000 [ 27.792847] RBP: 00007fa7797c6000 R08: 0000000000000009 R09: 0000000000001000 [ 27.793692] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acc80a9f70 [ 27.794532] R13: 00007ffe9ee05930 R14: 00007ffe9ee05960 R15: 00007ffe9ee05cc0 [ 27.795388] [ 27.795687] [ 27.795902] Allocated by task 213: [ 27.796330] kasan_save_stack+0x22/0x50 [ 27.796838] kasan_set_track+0x25/0x30 [ 27.797330] __kasan_slab_alloc+0x59/0x70 [ 27.797852] kmem_cache_alloc+0x16b/0x370 [ 27.798370] vm_area_dup+0x20/0x160 [ 27.798822] __split_vma+0x170/0x950 [ 27.799294] split_vma+0xc6/0x110 [ 27.799739] mprotect_fixup+0x8d2/0xb30 [ 27.800242] do_mprotect_pkey+0x87e/0xd40 [ 27.800768] __x64_sys_mprotect+0x78/0xc0 [ 27.801287] do_syscall_64+0x3f/0x90 [ 27.801761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.802402] [ 27.802617] Freed by task 19: [ 27.802999] kasan_save_stack+0x22/0x50 [ 27.803521] kasan_set_track+0x25/0x30 [ 27.804017] kasan_save_free_info+0x2b/0x50 [ 27.804549] __kasan_slab_free+0x10a/0x190 [ 27.805086] kmem_cache_free+0x10d/0x4d0 [ 27.805618] rcu_core+0x8c8/0x2860 [ 27.806076] __do_softirq+0x1b7/0x7d4 [ 27.806551] [ 27.806767] Last potentially related work creation: [ 27.807352] kasan_save_stack+0x22/0x50 [ 27.807872] __kasan_record_aux_stack+0x8e/0xa0 [ 27.808453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.809102] remove_vma+0x139/0x170 [ 27.809642] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.810209] do_vmi_munmap+0x1f1/0x2b0 [ 27.810693] __vm_munmap+0x138/0x3a0 [ 27.811167] __x64_sys_munmap+0x59/0x80 [ 27.811691] do_syscall_64+0x3f/0x90 [ 27.812169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.812813] [ 27.813027] The buggy address belongs to the object at ffff88800cbd9e80 [ 27.813027] which belongs to the cache vm_area_struct of size 168 [ 27.814497] The buggy address is located 88 bytes inside of [ 27.814497] freed 168-byte region [ffff88800cbd9e80, ffff88800cbd9f28) [ 27.815918] [ 27.816134] The buggy address belongs to the physical page: [ 27.816789] page:000000000167a2dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbd9 [ 27.817874] memcg:ffff88800e209e01 [ 27.818299] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.818949] page_type: 0xffffffff() [ 27.819403] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 27.820349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e209e01 [ 27.821263] page dumped because: kasan: bad access detected [ 27.821926] [ 27.822147] Memory state around the buggy address: [ 27.822733] ffff88800cbd9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.823622] ffff88800cbd9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.824490] >ffff88800cbd9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.825358] ^ [ 27.826093] ffff88800cbd9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 27.826961] ffff88800cbd9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.827829] ================================================================== [ 27.828756] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.661506] BUG: Bad rss-counter state mm:0000000095ff9d18 type:MM_FILEPAGES val:33 [ 29.662289] BUG: Bad rss-counter state mm:0000000095ff9d18 type:MM_ANONPAGES val:22 [ 30.120061] BUG: Bad rss-counter state mm:0000000001d6272b type:MM_FILEPAGES val:33 [ 30.121141] BUG: Bad rss-counter state mm:0000000001d6272b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38934' (ECDSA) to the list of known hosts. 2023/06/19 20:19:29 fuzzer started 2023/06/19 20:19:29 dialing manager at localhost:44161 2023/06/19 20:19:29 checking machine... 2023/06/19 20:19:29 checking revisions... [ 30.866228] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:19:29 testing simple program... [ 30.920787] cgroup: Unknown subsys name 'net' [ 30.963939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:19:25 Registers: info registers vcpu 0 RAX=1ffffffff0bb22c6 RBX=ffffffff85d91630 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffffffff85d91630 RSP=ffff888018e97820 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffffffff85d91630 R14=ffffffff85d91630 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fded0bfd900 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=00007fded11b50b0 CR3=00000000090c0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffd6cd4bc18 CR3=0000000005482000 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=00007f57cf598510000055bd58624790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000