[ 26.623332] BUG: Bad rss-counter state mm:0000000092e39e63 type:MM_FILEPAGES val:33 [ 26.624972] BUG: Bad rss-counter state mm:0000000092e39e63 type:MM_ANONPAGES val:22 [ 26.674437] ================================================================== [ 26.675413] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.676559] Read of size 8 at addr ffff88800e177df0 by task sshd/220 [ 26.677405] [ 26.677636] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.678595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.679640] Call Trace: [ 26.679975] [ 26.680283] dump_stack_lvl+0x91/0xf0 [ 26.680822] print_report+0xcc/0x620 [ 26.681337] ? __virt_addr_valid+0x102/0x340 [ 26.681945] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.682620] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.683301] kasan_report+0xbe/0xf0 [ 26.683815] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.684483] vma_interval_tree_remove+0xc75/0xec0 [ 26.685134] vma_prepare+0xc54/0x11a0 [ 26.685657] __split_vma+0x5af/0x950 [ 26.686187] ? __pfx___split_vma+0x10/0x10 [ 26.686778] ? find_held_lock+0x2c/0x110 [ 26.687360] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.687989] ? lock_is_held_type+0x9f/0x120 [ 26.688588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.689292] ? mtree_range_walk+0x632/0x900 [ 26.689913] ? mas_walk+0x5c7/0x7c0 [ 26.690440] do_vmi_munmap+0x1f1/0x2b0 [ 26.690987] mmap_region+0x1f9/0x2660 [ 26.691520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.692097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.692907] ? __pfx_lock_acquire+0x10/0x10 [ 26.693503] ? __pfx_mmap_region+0x10/0x10 [ 26.694094] ? security_mmap_addr+0x7d/0xa0 [ 26.694685] ? get_unmapped_area+0x1f5/0x3f0 [ 26.695298] do_mmap+0x854/0xf00 [ 26.695783] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.696335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.696923] ksys_mmap_pgoff+0x3af/0x500 [ 26.697428] do_syscall_64+0x3f/0x90 [ 26.697902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.698570] RIP: 0033:0x7f271ac78d82 [ 26.699026] 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 [ 26.701167] RSP: 002b:00007ffe42c76778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.702068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f271ac78d82 [ 26.702921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f271a0b2000 [ 26.703767] RBP: 00007f271a0b2000 R08: 0000000000000009 R09: 0000000000001000 [ 26.704625] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564117294ec0 [ 26.705467] R13: 00007ffe42c76790 R14: 00007ffe42c767c0 R15: 00007ffe42c76b20 [ 26.706326] [ 26.706618] [ 26.706834] Allocated by task 213: [ 26.707268] kasan_save_stack+0x22/0x50 [ 26.707778] kasan_set_track+0x25/0x30 [ 26.708268] __kasan_slab_alloc+0x59/0x70 [ 26.708813] kmem_cache_alloc+0x16b/0x370 [ 26.709325] vm_area_dup+0x20/0x160 [ 26.709777] __split_vma+0x170/0x950 [ 26.710240] split_vma+0xc6/0x110 [ 26.710676] mprotect_fixup+0x8d2/0xb30 [ 26.711178] do_mprotect_pkey+0x87e/0xd40 [ 26.711694] __x64_sys_mprotect+0x78/0xc0 [ 26.712209] do_syscall_64+0x3f/0x90 [ 26.712688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.713326] [ 26.713544] Freed by task 213: [ 26.713938] kasan_save_stack+0x22/0x50 [ 26.714438] kasan_set_track+0x25/0x30 [ 26.714940] kasan_save_free_info+0x2b/0x50 [ 26.715473] __kasan_slab_free+0x10a/0x190 [ 26.716003] kmem_cache_free+0x10d/0x4d0 [ 26.716513] rcu_core+0x8c8/0x2860 [ 26.716986] __do_softirq+0x1b7/0x7d4 [ 26.717468] [ 26.717685] Last potentially related work creation: [ 26.718268] kasan_save_stack+0x22/0x50 [ 26.718769] __kasan_record_aux_stack+0x8e/0xa0 [ 26.719342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.720077] remove_vma+0x139/0x170 [ 26.720531] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.721111] do_vmi_munmap+0x1f1/0x2b0 [ 26.721601] __vm_munmap+0x138/0x3a0 [ 26.722118] __x64_sys_munmap+0x59/0x80 [ 26.722667] do_syscall_64+0x3f/0x90 [ 26.723187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.723895] [ 26.724135] The buggy address belongs to the object at ffff88800e177d98 [ 26.724135] which belongs to the cache vm_area_struct of size 168 [ 26.725755] The buggy address is located 88 bytes inside of [ 26.725755] freed 168-byte region [ffff88800e177d98, ffff88800e177e40) [ 26.727344] [ 26.727589] The buggy address belongs to the physical page: [ 26.728346] page:00000000cd340af2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe177 [ 26.729618] memcg:ffff888018aa6f01 [ 26.730109] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.730922] page_type: 0xffffffff() [ 26.731437] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.732498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018aa6f01 [ 26.733543] page dumped because: kasan: bad access detected [ 26.734279] [ 26.734521] Memory state around the buggy address: [ 26.735157] ffff88800e177c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.736107] ffff88800e177d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.737054] >ffff88800e177d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.738006] ^ [ 26.738898] ffff88800e177e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.739841] ffff88800e177e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.740801] ================================================================== [ 26.741847] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.998187] BUG: Bad rss-counter state mm:000000008b7b709c type:MM_FILEPAGES val:33 [ 28.999199] BUG: Bad rss-counter state mm:000000008b7b709c type:MM_ANONPAGES val:22 [ 29.455659] BUG: Bad rss-counter state mm:000000000eb29045 type:MM_FILEPAGES val:33 [ 29.456709] BUG: Bad rss-counter state mm:000000000eb29045 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23259' (ECDSA) to the list of known hosts. 2023/06/20 03:06:16 fuzzer started 2023/06/20 03:06:16 dialing manager at localhost:44161 2023/06/20 03:06:16 checking machine... 2023/06/20 03:06:16 checking revisions... [ 30.240061] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:06:16 testing simple program... [ 30.284801] cgroup: Unknown subsys name 'net' [ 30.324370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff888015c4fe01 RSI=ffff888015c4fe10 RDI=ffff888015c4fe10 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888015c4fe10 R15=ffff88806ce09a98 RIP=ffffffff81131236 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fad7b7f6900 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=00007fad7abf3210 CR3=000000000d828000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=308ef61bc7e28b7200000000000ae988 XMM05=d03c06c5975800cf0000000000133b20 XMM06=19e9129bd510f2350000000000132190 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f880be16477 RCX=ffffffff813a0a8d RDX=ffff888015da1b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88800fc57988 R8 =0000000000000006 R9 =00007f880be16477 R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888015da1b40 R15=ffff88801c6b35f0 RIP=ffffffff814c07e0 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 00007f880b923900 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=00007f880bedb0b0 CR3=000000000e644000 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