syzkaller login: [ 30.837524] BUG: Bad rss-counter state mm:0000000074999168 type:MM_FILEPAGES val:33 [ 30.838242] BUG: Bad rss-counter state mm:0000000074999168 type:MM_ANONPAGES val:22 [ 30.997929] ================================================================== [ 30.998584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.999505] Read of size 8 at addr ffff8880190e5b38 by task sshd/223 [ 31.001067] [ 31.001484] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.003415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.005489] Call Trace: [ 31.006120] [ 31.006729] dump_stack_lvl+0x91/0xf0 [ 31.007833] print_report+0xcc/0x620 [ 31.008749] ? __virt_addr_valid+0x102/0x340 [ 31.009866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.012737] kasan_report+0xbe/0xf0 [ 31.013617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.014978] vma_interval_tree_remove+0xc75/0xec0 [ 31.016190] vma_prepare+0xc54/0x11a0 [ 31.017141] __split_vma+0x5af/0x950 [ 31.018065] ? __pfx___split_vma+0x10/0x10 [ 31.019130] ? find_held_lock+0x2c/0x110 [ 31.020170] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.021285] ? lock_is_held_type+0x9f/0x120 [ 31.022464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.023722] ? mtree_range_walk+0x632/0x900 [ 31.024863] ? mas_walk+0x5c7/0x7c0 [ 31.025804] do_vmi_munmap+0x1f1/0x2b0 [ 31.026841] mmap_region+0x1f9/0x2660 [ 31.027829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.028919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.030845] ? __pfx_lock_acquire+0x10/0x10 [ 31.031943] ? __pfx_mmap_region+0x10/0x10 [ 31.032972] ? security_mmap_addr+0x7d/0xa0 [ 31.034040] ? get_unmapped_area+0x1f5/0x3f0 [ 31.035164] do_mmap+0x854/0xf00 [ 31.036017] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.037039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.038200] ksys_mmap_pgoff+0x3af/0x500 [ 31.039216] do_syscall_64+0x3f/0x90 [ 31.040156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041836] RIP: 0033:0x7f3686e45d82 [ 31.042948] 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 [ 31.047939] RSP: 002b:00007ffcdddfb0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.050049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3686e45d82 [ 31.051956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f368627f000 [ 31.053831] RBP: 00007f368627f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62f4f5f70 [ 31.057758] R13: 00007ffcdddfb100 R14: 00007ffcdddfb130 R15: 00007ffcdddfb490 [ 31.059664] [ 31.060296] [ 31.060702] Allocated by task 214: [ 31.061633] kasan_save_stack+0x22/0x50 [ 31.062788] kasan_set_track+0x25/0x30 [ 31.063844] __kasan_slab_alloc+0x59/0x70 [ 31.064982] kmem_cache_alloc+0x16b/0x370 [ 31.066185] vm_area_dup+0x20/0x160 [ 31.067235] __split_vma+0x170/0x950 [ 31.068263] split_vma+0xc6/0x110 [ 31.069217] mprotect_fixup+0x8d2/0xb30 [ 31.070368] do_mprotect_pkey+0x87e/0xd40 [ 31.071466] __x64_sys_mprotect+0x78/0xc0 [ 31.072524] do_syscall_64+0x3f/0x90 [ 31.073487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074949] [ 31.075347] Freed by task 19: [ 31.076172] kasan_save_stack+0x22/0x50 [ 31.077199] kasan_set_track+0x25/0x30 [ 31.078245] kasan_save_free_info+0x2b/0x50 [ 31.079381] __kasan_slab_free+0x10a/0x190 [ 31.080479] kmem_cache_free+0x10d/0x4d0 [ 31.081545] rcu_core+0x8c8/0x2860 [ 31.086545] __do_softirq+0x1b7/0x7d4 [ 31.086887] [ 31.087042] Last potentially related work creation: [ 31.087445] kasan_save_stack+0x22/0x50 [ 31.087784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.088161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.088588] remove_vma+0x139/0x170 [ 31.088891] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.089278] do_vmi_munmap+0x1f1/0x2b0 [ 31.089609] __vm_munmap+0x138/0x3a0 [ 31.089926] __x64_sys_munmap+0x59/0x80 [ 31.090275] do_syscall_64+0x3f/0x90 [ 31.090626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091056] [ 31.091200] The buggy address belongs to the object at ffff8880190e5ae0 [ 31.091200] which belongs to the cache vm_area_struct of size 168 [ 31.092204] The buggy address is located 88 bytes inside of [ 31.092204] freed 168-byte region [ffff8880190e5ae0, ffff8880190e5b88) [ 31.093191] [ 31.093338] The buggy address belongs to the physical page: [ 31.093789] page:00000000c7c0de71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x190e5 [ 31.094544] memcg:ffff8880166a3601 [ 31.094844] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.095326] page_type: 0xffffffff() [ 31.095637] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.096295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166a3601 [ 31.096930] page dumped because: kasan: bad access detected [ 31.097392] [ 31.097541] Memory state around the buggy address: [ 31.097938] ffff8880190e5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.098703] ffff8880190e5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.099291] >ffff8880190e5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.099883] ^ [ 31.100307] ffff8880190e5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.100900] ffff8880190e5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.101490] ================================================================== [ 31.102221] Disabling lock debugging due to kernel taint [ 33.298232] BUG: Bad rss-counter state mm:00000000d18fbc16 type:MM_FILEPAGES val:33 [ 33.299509] BUG: Bad rss-counter state mm:00000000d18fbc16 type:MM_ANONPAGES val:22 [ 33.661927] BUG: Bad rss-counter state mm:00000000b22e5c00 type:MM_FILEPAGES val:33 [ 33.662508] BUG: Bad rss-counter state mm:00000000b22e5c00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35721' (ECDSA) to the list of known hosts. 2023/06/21 10:38:58 fuzzer started 2023/06/21 10:38:58 dialing manager at localhost:36067 2023/06/21 10:38:58 checking machine... 2023/06/21 10:38:58 checking revisions... [ 34.345431] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:38:58 testing simple program... [ 34.377772] cgroup: Unknown subsys name 'net' [ 34.421211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:58 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=00007fff19734b78 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=00007f52b70b45100000562e4bc80790 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=0000000000400100 RBX=00000000000928c0 RCX=00000000000008c0 RDX=0000000000000000 RSI=00000000000928c0 RDI=ffff888014339b6c RBP=ffff888015a575d0 RSP=ffff888015a575c0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed1002b3a000 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=ffff888014339b40 R15=ffffffff8184725c RIP=ffffffff81787d6a 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 00007f65de2c8900 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=00007f65de87f618 CR3=000000000e948000 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