[ 42.553468] BUG: Bad rss-counter state mm:000000009165966a type:MM_FILEPAGES val:33 [ 42.554890] BUG: Bad rss-counter state mm:000000009165966a type:MM_ANONPAGES val:22 [ 42.702374] ================================================================== [ 42.703332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.704265] Read of size 8 at addr ffff88800e92eb38 by task sshd/220 [ 42.705166] [ 42.705403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.706284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.707264] Call Trace: [ 42.707587] [ 42.707875] dump_stack_lvl+0x91/0xf0 [ 42.708368] print_report+0xcc/0x620 [ 42.708852] ? __virt_addr_valid+0x102/0x340 [ 42.709405] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.710031] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.710649] kasan_report+0xbe/0xf0 [ 42.711126] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.711752] vma_interval_tree_remove+0xc75/0xec0 [ 42.712374] vma_prepare+0xc54/0x11a0 [ 42.712858] __split_vma+0x5af/0x950 [ 42.713333] ? __pfx___split_vma+0x10/0x10 [ 42.713882] ? find_held_lock+0x2c/0x110 [ 42.714418] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.714995] ? lock_is_held_type+0x9f/0x120 [ 42.715542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.716165] ? mtree_range_walk+0x632/0x900 [ 42.716730] ? mas_walk+0x5c7/0x7c0 [ 42.717217] do_vmi_munmap+0x1f1/0x2b0 [ 42.717724] mmap_region+0x1f9/0x2660 [ 42.718216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.718728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.719466] ? __pfx_lock_acquire+0x10/0x10 [ 42.720000] ? __pfx_mmap_region+0x10/0x10 [ 42.720543] ? security_mmap_addr+0x7d/0xa0 [ 42.721075] ? get_unmapped_area+0x1f5/0x3f0 [ 42.721650] do_mmap+0x854/0xf00 [ 42.722093] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.722606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.723174] ksys_mmap_pgoff+0x3af/0x500 [ 42.723691] do_syscall_64+0x3f/0x90 [ 42.724171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.724820] RIP: 0033:0x7f2ffab0bd82 [ 42.725296] 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 [ 42.727508] RSP: 002b:00007ffe881973b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.728429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ffab0bd82 [ 42.729296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ff9f45000 [ 42.730165] RBP: 00007f2ff9f45000 R08: 0000000000000009 R09: 0000000000001000 [ 42.731026] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8a5af7b20 [ 42.731886] R13: 00007ffe881973d0 R14: 00007ffe88197400 R15: 00007ffe88197760 [ 42.732753] [ 42.733054] [ 42.733273] Allocated by task 213: [ 42.733733] kasan_save_stack+0x22/0x50 [ 42.734247] kasan_set_track+0x25/0x30 [ 42.734751] __kasan_slab_alloc+0x59/0x70 [ 42.735285] kmem_cache_alloc+0x16b/0x370 [ 42.735812] vm_area_dup+0x20/0x160 [ 42.736269] __split_vma+0x170/0x950 [ 42.736760] split_vma+0xc6/0x110 [ 42.737208] mprotect_fixup+0x8d2/0xb30 [ 42.737723] do_mprotect_pkey+0x87e/0xd40 [ 42.738253] __x64_sys_mprotect+0x78/0xc0 [ 42.738778] do_syscall_64+0x3f/0x90 [ 42.739262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.739901] [ 42.740121] Freed by task 213: [ 42.740512] kasan_save_stack+0x22/0x50 [ 42.741021] kasan_set_track+0x25/0x30 [ 42.741531] kasan_save_free_info+0x2b/0x50 [ 42.742075] __kasan_slab_free+0x10a/0x190 [ 42.742608] kmem_cache_free+0x10d/0x4d0 [ 42.743119] rcu_core+0x8c8/0x2860 [ 42.743566] __do_softirq+0x1b7/0x7d4 [ 42.744045] [ 42.744269] Last potentially related work creation: [ 42.744867] kasan_save_stack+0x22/0x50 [ 42.745381] __kasan_record_aux_stack+0x8e/0xa0 [ 42.746020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.746674] remove_vma+0x139/0x170 [ 42.747132] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.747693] do_vmi_munmap+0x1f1/0x2b0 [ 42.748189] __vm_munmap+0x138/0x3a0 [ 42.748661] __x64_sys_munmap+0x59/0x80 [ 42.749171] do_syscall_64+0x3f/0x90 [ 42.749668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.750326] [ 42.750548] Second to last potentially related work creation: [ 42.751242] kasan_save_stack+0x22/0x50 [ 42.751745] __kasan_record_aux_stack+0x8e/0xa0 [ 42.752318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.752970] remove_vma+0x139/0x170 [ 42.753429] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.753995] do_vmi_munmap+0x1f1/0x2b0 [ 42.754480] mmap_region+0x1f9/0x2660 [ 42.754961] do_mmap+0x854/0xf00 [ 42.755401] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.755903] ksys_mmap_pgoff+0x3af/0x500 [ 42.756416] do_syscall_64+0x3f/0x90 [ 42.756900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.757580] [ 42.757797] The buggy address belongs to the object at ffff88800e92eae0 [ 42.757797] which belongs to the cache vm_area_struct of size 168 [ 42.759293] The buggy address is located 88 bytes inside of [ 42.759293] freed 168-byte region [ffff88800e92eae0, ffff88800e92eb88) [ 42.760698] [ 42.760915] The buggy address belongs to the physical page: [ 42.761606] page:00000000cdad6460 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe92e [ 42.762713] memcg:ffff88800f165401 [ 42.763147] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.763802] page_type: 0xffffffff() [ 42.764259] raw: 0100000000000200 ffff88800879fc80 ffffea0000399a00 0000000000000006 [ 42.765192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f165401 [ 42.766125] page dumped because: kasan: bad access detected [ 42.766792] [ 42.767008] Memory state around the buggy address: [ 42.767603] ffff88800e92ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.768473] ffff88800e92ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 42.769348] >ffff88800e92eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.770218] ^ [ 42.770831] ffff88800e92eb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 42.771703] ffff88800e92ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.772561] ================================================================== [ 42.773532] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.778324] BUG: Bad rss-counter state mm:000000002977e53b type:MM_FILEPAGES val:33 [ 44.779477] BUG: Bad rss-counter state mm:000000002977e53b type:MM_ANONPAGES val:22 [ 45.284334] BUG: Bad rss-counter state mm:000000001561a73d type:MM_FILEPAGES val:33 [ 45.285327] BUG: Bad rss-counter state mm:000000001561a73d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55216' (ECDSA) to the list of known hosts. 2023/06/19 11:51:52 fuzzer started 2023/06/19 11:51:53 dialing manager at localhost:44161 2023/06/19 11:51:53 checking machine... 2023/06/19 11:51:53 checking revisions... [ 45.916217] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:51:53 testing simple program... [ 45.970805] cgroup: Unknown subsys name 'net' [ 46.017174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:51:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146f4528 RCX=ffffffff812e00d6 RDX=00000000ffffffff RSI=0000000000000004 RDI=ffff8880146f4528 RBP=1ffff110032caf60 RSP=ffff888019657af0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880146f4530 R13=ffff8880146f4538 R14=0000000000000001 R15=ffff8880146f4000 RIP=ffffffff8180fd58 RFL=00000086 [--S--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 00007f24663ca900 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=00007ffc525c7000 CR3=000000000f63e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f20c5410b08 CR3=000000000d986000 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=ec5d3b40f7b951bbd246c11f849cb99b XMM02=ec2efd57dc4c00df000000000011d530 XMM03=b8f9c023b55fc9c1000000000011d600 XMM04=d3a26b47498828bf00000000000ae988 XMM05=19e9129bd510f2350000000000134ee8 XMM06=09881e6cb8e1df9a00000000001340c0 XMM07=e042d86d42eb936e0000000000124278 XMM08=b8f9c023b55fc9c1000000000011d600 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000