syzkaller login: [ 47.498876] BUG: Bad rss-counter state mm:000000001d27c3b8 type:MM_FILEPAGES val:33 [ 47.500080] BUG: Bad rss-counter state mm:000000001d27c3b8 type:MM_ANONPAGES val:22 [ 47.648035] ================================================================== [ 47.648956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.649930] Read of size 8 at addr ffff88800fe4d6b0 by task sshd/220 [ 47.650705] [ 47.650927] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.651891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.652883] Call Trace: [ 47.653211] [ 47.653539] dump_stack_lvl+0x91/0xf0 [ 47.654035] print_report+0xcc/0x620 [ 47.654528] ? __virt_addr_valid+0x102/0x340 [ 47.655081] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.655698] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.656322] kasan_report+0xbe/0xf0 [ 47.656811] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.657476] vma_interval_tree_remove+0xc75/0xec0 [ 47.658099] vma_prepare+0xc54/0x11a0 [ 47.658580] __split_vma+0x5af/0x950 [ 47.659054] ? __pfx___split_vma+0x10/0x10 [ 47.659592] ? find_held_lock+0x2c/0x110 [ 47.660127] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.660709] ? lock_is_held_type+0x9f/0x120 [ 47.661259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.661880] ? mtree_range_walk+0x632/0x900 [ 47.662428] ? mas_walk+0x5c7/0x7c0 [ 47.662910] do_vmi_munmap+0x1f1/0x2b0 [ 47.663404] mmap_region+0x1f9/0x2660 [ 47.663890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.664409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.665131] ? __pfx_lock_acquire+0x10/0x10 [ 47.665672] ? __pfx_mmap_region+0x10/0x10 [ 47.666209] ? security_mmap_addr+0x7d/0xa0 [ 47.666743] ? get_unmapped_area+0x1f5/0x3f0 [ 47.667297] do_mmap+0x854/0xf00 [ 47.667740] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.668237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.668807] ksys_mmap_pgoff+0x3af/0x500 [ 47.669311] do_syscall_64+0x3f/0x90 [ 47.669815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.670468] RIP: 0033:0x7f454d406d82 [ 47.670931] 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 [ 47.673069] RSP: 002b:00007ffce918cb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.673980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f454d406d82 [ 47.674837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f454c840000 [ 47.675686] RBP: 00007f454c840000 R08: 0000000000000009 R09: 0000000000001000 [ 47.676532] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563451e88d90 [ 47.677385] R13: 00007ffce918cb70 R14: 00007ffce918cba0 R15: 00007ffce918cf00 [ 47.678268] [ 47.678562] [ 47.678781] Allocated by task 213: [ 47.679218] kasan_save_stack+0x22/0x50 [ 47.679727] kasan_set_track+0x25/0x30 [ 47.680223] __kasan_slab_alloc+0x59/0x70 [ 47.680748] kmem_cache_alloc+0x16b/0x370 [ 47.681264] vm_area_dup+0x20/0x160 [ 47.681737] __split_vma+0x170/0x950 [ 47.682206] split_vma+0xc6/0x110 [ 47.682653] mprotect_fixup+0x8d2/0xb30 [ 47.683162] do_mprotect_pkey+0x87e/0xd40 [ 47.683682] __x64_sys_mprotect+0x78/0xc0 [ 47.684204] do_syscall_64+0x3f/0x90 [ 47.684682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.685332] [ 47.685559] Freed by task 203: [ 47.685952] kasan_save_stack+0x22/0x50 [ 47.686461] kasan_set_track+0x25/0x30 [ 47.686958] kasan_save_free_info+0x2b/0x50 [ 47.687500] __kasan_slab_free+0x10a/0x190 [ 47.688034] kmem_cache_free+0x10d/0x4d0 [ 47.688549] rcu_core+0x8c8/0x2860 [ 47.688995] __do_softirq+0x1b7/0x7d4 [ 47.689489] [ 47.689704] Last potentially related work creation: [ 47.690293] kasan_save_stack+0x22/0x50 [ 47.690804] __kasan_record_aux_stack+0x8e/0xa0 [ 47.691379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.692028] remove_vma+0x139/0x170 [ 47.692488] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.693126] do_vmi_munmap+0x1f1/0x2b0 [ 47.693657] __vm_munmap+0x138/0x3a0 [ 47.694129] __x64_sys_munmap+0x59/0x80 [ 47.694628] do_syscall_64+0x3f/0x90 [ 47.695104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.695741] [ 47.695959] The buggy address belongs to the object at ffff88800fe4d658 [ 47.695959] which belongs to the cache vm_area_struct of size 168 [ 47.697420] The buggy address is located 88 bytes inside of [ 47.697420] freed 168-byte region [ffff88800fe4d658, ffff88800fe4d700) [ 47.698838] [ 47.699055] The buggy address belongs to the physical page: [ 47.699711] page:0000000041ea9c96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe4d [ 47.700780] memcg:ffff888016404c01 [ 47.701210] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.701859] page_type: 0xffffffff() [ 47.702305] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.703221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016404c01 [ 47.704124] page dumped because: kasan: bad access detected [ 47.704788] [ 47.705006] Memory state around the buggy address: [ 47.705603] ffff88800fe4d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.706476] ffff88800fe4d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.707340] >ffff88800fe4d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.708193] ^ [ 47.708786] ffff88800fe4d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.709668] ffff88800fe4d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.710546] ================================================================== [ 47.711459] Disabling lock debugging due to kernel taint [ 49.705549] BUG: Bad rss-counter state mm:000000008acb1786 type:MM_FILEPAGES val:33 [ 49.706566] BUG: Bad rss-counter state mm:000000008acb1786 type:MM_ANONPAGES val:22 [ 50.240046] BUG: Bad rss-counter state mm:0000000075659200 type:MM_FILEPAGES val:33 [ 50.241203] BUG: Bad rss-counter state mm:0000000075659200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60962' (ECDSA) to the list of known hosts. 2023/06/19 11:17:55 fuzzer started 2023/06/19 11:17:56 dialing manager at localhost:44161 2023/06/19 11:17:56 checking machine... 2023/06/19 11:17:56 checking revisions... [ 50.920764] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:17:56 testing simple program... [ 50.966141] cgroup: Unknown subsys name 'net' [ 51.003106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f95c3753477 RCX=0000000000000100 RDX=ffff88800efb9b40 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =ffffffff864b9d5a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800efb9b40 R15=ffff88800e4c6ec0 RIP=ffffffff814c0380 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 00007f95c3260900 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=00007f95c3817618 CR3=000000000cb9c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f2d824a4070 CR3=0000000008fea000 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=3f5e3f2a02be048be2414becf8711997 XMM02=ec2efd57dc4c00df000000000011ee38 XMM03=ab5db35f5c7c3529000000000011ef08 XMM04=f32a91891a9622c300000000000ae988 XMM05=19e9129bd510f2350000000000135818 XMM06=a070bb4383337f640000000000134680 XMM07=e042d86d42eb936e0000000000126670 XMM08=ab5db35f5c7c3529000000000011ef08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000