syzkaller login: [ 30.104772] BUG: Bad rss-counter state mm:00000000a1c0fed8 type:MM_FILEPAGES val:33 [ 30.106311] BUG: Bad rss-counter state mm:00000000a1c0fed8 type:MM_ANONPAGES val:22 [ 30.262616] ================================================================== [ 30.263551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.264497] Read of size 8 at addr ffff888016e216b0 by task sshd/221 [ 30.265273] [ 30.265561] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.266482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.267471] Call Trace: [ 30.267809] [ 30.268096] dump_stack_lvl+0x91/0xf0 [ 30.268590] print_report+0xcc/0x620 [ 30.269077] ? __virt_addr_valid+0x102/0x340 [ 30.269663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.270292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.270921] kasan_report+0xbe/0xf0 [ 30.271396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.272015] vma_interval_tree_remove+0xc75/0xec0 [ 30.272615] vma_prepare+0xc54/0x11a0 [ 30.273115] __split_vma+0x5af/0x950 [ 30.273599] ? __pfx___split_vma+0x10/0x10 [ 30.274125] ? find_held_lock+0x2c/0x110 [ 30.274661] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.275226] ? lock_is_held_type+0x9f/0x120 [ 30.275781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.276396] ? mtree_range_walk+0x632/0x900 [ 30.276947] ? mas_walk+0x5c7/0x7c0 [ 30.277430] do_vmi_munmap+0x1f1/0x2b0 [ 30.277951] mmap_region+0x1f9/0x2660 [ 30.278436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.278957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.279671] ? __pfx_lock_acquire+0x10/0x10 [ 30.280198] ? __pfx_mmap_region+0x10/0x10 [ 30.280731] ? security_mmap_addr+0x7d/0xa0 [ 30.281301] ? get_unmapped_area+0x1f5/0x3f0 [ 30.281853] do_mmap+0x854/0xf00 [ 30.282294] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.282789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.283365] ksys_mmap_pgoff+0x3af/0x500 [ 30.283864] do_syscall_64+0x3f/0x90 [ 30.284343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.285002] RIP: 0033:0x7f65f7ae3d82 [ 30.285469] 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 [ 30.287615] RSP: 002b:00007ffc195328d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.288530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65f7ae3d82 [ 30.289412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65f6f1d000 [ 30.290264] RBP: 00007f65f6f1d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.291120] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559207697ec0 [ 30.291965] R13: 00007ffc195328f0 R14: 00007ffc19532920 R15: 00007ffc19532c80 [ 30.292855] [ 30.293148] [ 30.293380] Allocated by task 214: [ 30.293830] kasan_save_stack+0x22/0x50 [ 30.294345] kasan_set_track+0x25/0x30 [ 30.294844] __kasan_slab_alloc+0x59/0x70 [ 30.295374] kmem_cache_alloc+0x16b/0x370 [ 30.295904] vm_area_dup+0x20/0x160 [ 30.296354] __split_vma+0x170/0x950 [ 30.296817] split_vma+0xc6/0x110 [ 30.297268] mprotect_fixup+0x8d2/0xb30 [ 30.297784] do_mprotect_pkey+0x87e/0xd40 [ 30.298303] __x64_sys_mprotect+0x78/0xc0 [ 30.298826] do_syscall_64+0x3f/0x90 [ 30.299303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.299950] [ 30.300185] Freed by task 214: [ 30.300584] kasan_save_stack+0x22/0x50 [ 30.301085] kasan_set_track+0x25/0x30 [ 30.301616] kasan_save_free_info+0x2b/0x50 [ 30.302151] __kasan_slab_free+0x10a/0x190 [ 30.302686] kmem_cache_free+0x10d/0x4d0 [ 30.303194] rcu_core+0x8c8/0x2860 [ 30.303641] __do_softirq+0x1b7/0x7d4 [ 30.304120] [ 30.304338] Last potentially related work creation: [ 30.304949] kasan_save_stack+0x22/0x50 [ 30.305465] __kasan_record_aux_stack+0x8e/0xa0 [ 30.306059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.306716] remove_vma+0x139/0x170 [ 30.307163] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.307736] do_vmi_munmap+0x1f1/0x2b0 [ 30.308218] __vm_munmap+0x138/0x3a0 [ 30.308683] __x64_sys_munmap+0x59/0x80 [ 30.309199] do_syscall_64+0x3f/0x90 [ 30.309678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310345] [ 30.310565] The buggy address belongs to the object at ffff888016e21658 [ 30.310565] which belongs to the cache vm_area_struct of size 168 [ 30.312037] The buggy address is located 88 bytes inside of [ 30.312037] freed 168-byte region [ffff888016e21658, ffff888016e21700) [ 30.313480] [ 30.313699] The buggy address belongs to the physical page: [ 30.314350] page:0000000045550884 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e21 [ 30.315449] memcg:ffff888016239a01 [ 30.315875] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.316538] page_type: 0xffffffff() [ 30.316988] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.317930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016239a01 [ 30.318847] page dumped because: kasan: bad access detected [ 30.319512] [ 30.319725] Memory state around the buggy address: [ 30.320325] ffff888016e21580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.321206] ffff888016e21600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.322070] >ffff888016e21680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.322920] ^ [ 30.323498] ffff888016e21700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.324361] ffff888016e21780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.325223] ================================================================== [ 30.326333] Disabling lock debugging due to kernel taint [ 32.084914] BUG: Bad rss-counter state mm:000000000c06490e type:MM_FILEPAGES val:33 [ 32.085626] BUG: Bad rss-counter state mm:000000000c06490e type:MM_ANONPAGES val:22 [ 32.574431] BUG: Bad rss-counter state mm:00000000f90f2bc7 type:MM_FILEPAGES val:33 [ 32.575628] BUG: Bad rss-counter state mm:00000000f90f2bc7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32251' (ECDSA) to the list of known hosts. 2023/06/20 14:36:16 fuzzer started 2023/06/20 14:36:16 dialing manager at localhost:36067 2023/06/20 14:36:16 checking machine... 2023/06/20 14:36:16 checking revisions... [ 33.267536] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:36:16 testing simple program... [ 33.315662] cgroup: Unknown subsys name 'net' [ 33.368804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:36:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd1a352bb8 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=00007fc09fa02510000055a1261d8790 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=0000000000000017 RCX=0000000000000000 RDX=ffff88800e969b40 RSI=ffffffff83723de9 RDI=0000000000000005 RBP=0000000000000018 RSP=ffff88801a0a77b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99b98 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c089b 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 00007fbf0fefb900 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=00007fbf104b2618 CR3=000000000edf2000 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=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