[ 24.043531] BUG: Bad rss-counter state mm:00000000514ab443 type:MM_FILEPAGES val:33 [ 24.044915] BUG: Bad rss-counter state mm:00000000514ab443 type:MM_ANONPAGES val:22 [ 24.206809] ================================================================== [ 24.207735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.208697] Read of size 8 at addr ffff88801a349d08 by task sshd/218 [ 24.209495] [ 24.209713] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.210693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.211716] Call Trace: [ 24.212045] [ 24.212356] dump_stack_lvl+0x91/0xf0 [ 24.212859] print_report+0xcc/0x620 [ 24.213352] ? __virt_addr_valid+0x102/0x340 [ 24.213917] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.214548] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.215179] kasan_report+0xbe/0xf0 [ 24.215677] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.216305] vma_interval_tree_remove+0xc75/0xec0 [ 24.216921] vma_prepare+0xc54/0x11a0 [ 24.217412] __split_vma+0x5af/0x950 [ 24.217899] ? __pfx___split_vma+0x10/0x10 [ 24.218438] ? find_held_lock+0x2c/0x110 [ 24.218971] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.219539] ? lock_is_held_type+0x9f/0x120 [ 24.220095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.220709] ? mtree_range_walk+0x632/0x900 [ 24.221274] ? mas_walk+0x5c7/0x7c0 [ 24.221757] do_vmi_munmap+0x1f1/0x2b0 [ 24.222254] mmap_region+0x1f9/0x2660 [ 24.222750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.223275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.224022] ? __pfx_lock_acquire+0x10/0x10 [ 24.224564] ? __pfx_mmap_region+0x10/0x10 [ 24.225101] ? security_mmap_addr+0x7d/0xa0 [ 24.225637] ? get_unmapped_area+0x1f5/0x3f0 [ 24.226204] do_mmap+0x854/0xf00 [ 24.226646] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.227145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.227725] ksys_mmap_pgoff+0x3af/0x500 [ 24.228232] do_syscall_64+0x3f/0x90 [ 24.228717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.229368] RIP: 0033:0x7fee9374ed82 [ 24.229829] 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 [ 24.232005] RSP: 002b:00007fff3bbe6c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.232919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee9374ed82 [ 24.233782] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee92b88000 [ 24.234639] RBP: 00007fee92b88000 R08: 0000000000000009 R09: 0000000000001000 [ 24.235497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563219a18b20 [ 24.236377] R13: 00007fff3bbe6cb0 R14: 00007fff3bbe6ce0 R15: 00007fff3bbe7040 [ 24.237255] [ 24.237547] [ 24.237764] Allocated by task 211: [ 24.238203] kasan_save_stack+0x22/0x50 [ 24.238706] kasan_set_track+0x25/0x30 [ 24.239206] __kasan_slab_alloc+0x59/0x70 [ 24.239754] kmem_cache_alloc+0x16b/0x370 [ 24.240286] vm_area_dup+0x20/0x160 [ 24.240748] __split_vma+0x170/0x950 [ 24.241224] split_vma+0xc6/0x110 [ 24.241666] mprotect_fixup+0x8d2/0xb30 [ 24.242179] do_mprotect_pkey+0x87e/0xd40 [ 24.242708] __x64_sys_mprotect+0x78/0xc0 [ 24.243230] do_syscall_64+0x3f/0x90 [ 24.243732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.244392] [ 24.244607] Freed by task 202: [ 24.245028] kasan_save_stack+0x22/0x50 [ 24.245539] kasan_set_track+0x25/0x30 [ 24.246054] kasan_save_free_info+0x2b/0x50 [ 24.246599] __kasan_slab_free+0x10a/0x190 [ 24.247145] kmem_cache_free+0x10d/0x4d0 [ 24.247666] rcu_core+0x8c8/0x2860 [ 24.248131] __do_softirq+0x1b7/0x7d4 [ 24.248628] [ 24.248849] Last potentially related work creation: [ 24.249452] kasan_save_stack+0x22/0x50 [ 24.249971] __kasan_record_aux_stack+0x8e/0xa0 [ 24.250565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.251237] remove_vma+0x139/0x170 [ 24.251714] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.252291] do_vmi_munmap+0x1f1/0x2b0 [ 24.252807] __vm_munmap+0x138/0x3a0 [ 24.253295] __x64_sys_munmap+0x59/0x80 [ 24.253815] do_syscall_64+0x3f/0x90 [ 24.254315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.254983] [ 24.255206] The buggy address belongs to the object at ffff88801a349cb0 [ 24.255206] which belongs to the cache vm_area_struct of size 168 [ 24.256766] The buggy address is located 88 bytes inside of [ 24.256766] freed 168-byte region [ffff88801a349cb0, ffff88801a349d58) [ 24.258251] [ 24.258477] The buggy address belongs to the physical page: [ 24.259175] page:000000007fa026e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a349 [ 24.260346] memcg:ffff88801a384b01 [ 24.260792] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.261466] page_type: 0xffffffff() [ 24.261935] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.262898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a384b01 [ 24.263873] page dumped because: kasan: bad access detected [ 24.264566] [ 24.264788] Memory state around the buggy address: [ 24.265391] ffff88801a349c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.266286] ffff88801a349c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.267176] >ffff88801a349d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.268077] ^ [ 24.268538] ffff88801a349d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.269431] ffff88801a349e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.270323] ================================================================== [ 24.271381] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.671683] BUG: Bad rss-counter state mm:0000000053cf6345 type:MM_FILEPAGES val:33 [ 26.672681] BUG: Bad rss-counter state mm:0000000053cf6345 type:MM_ANONPAGES val:22 [ 27.069894] BUG: Bad rss-counter state mm:00000000a82c6b20 type:MM_FILEPAGES val:33 [ 27.071155] BUG: Bad rss-counter state mm:00000000a82c6b20 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29085' (ECDSA) to the list of known hosts. 2023/06/20 11:24:50 fuzzer started 2023/06/20 11:24:50 dialing manager at localhost:36067 2023/06/20 11:24:50 checking machine... 2023/06/20 11:24:50 checking revisions... [ 27.662501] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:24:50 testing simple program... [ 27.706130] cgroup: Unknown subsys name 'net' [ 27.771198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b30 RCX=ffffffff81132ffe RDX=1ffff1100d9c1358 RSI=0000000000000000 RDI=ffff88806ce09b08 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a48 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806ce09a98 R11=0000000000000000 R12=ffff88806ce09ab8 R13=ffff88806ce09ac0 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81132ee2 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 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=00007ffe42db9e98 CR3=0000000005482000 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=00007f19df5e451000005629a4315790 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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000008000 RCX=00007f95bb0c2477 RDX=0000000000000001 RSI=0000000000000002 RDI=0000000000000008 RBP=0000558f85f4e350 RSP=00007ffd328f42d8 R8 =0000558f85f6e680 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000202 R12=0000000000000008 R13=0000558f85f4e350 R14=0000000000000005 R15=0000558f85f6e680 RIP=00007f95bb0b2330 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f95babcf900 00000000 00000000 GS =0000 0000000000000000 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=00007f95bb1870b0 CR3=0000000018ffa000 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=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