syzkaller login: [ 38.913308] BUG: Bad rss-counter state mm:000000000729daf4 type:MM_FILEPAGES val:33 [ 38.914497] BUG: Bad rss-counter state mm:000000000729daf4 type:MM_ANONPAGES val:22 [ 38.949440] ================================================================== [ 38.950458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951499] Read of size 8 at addr ffff88800ebc06b0 by task sshd/220 [ 38.952366] [ 38.952687] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.953657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.954704] Call Trace: [ 38.955119] [ 38.955436] dump_stack_lvl+0x91/0xf0 [ 38.955931] print_report+0xcc/0x620 [ 38.956418] ? __virt_addr_valid+0x102/0x340 [ 38.956996] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957611] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.958233] kasan_report+0xbe/0xf0 [ 38.958709] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.959325] vma_interval_tree_remove+0xc75/0xec0 [ 38.959929] vma_prepare+0xc54/0x11a0 [ 38.960406] __split_vma+0x5af/0x950 [ 38.960908] ? __pfx___split_vma+0x10/0x10 [ 38.961437] ? find_held_lock+0x2c/0x110 [ 38.961959] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.962525] ? lock_is_held_type+0x9f/0x120 [ 38.963061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.963667] ? mtree_range_walk+0x632/0x900 [ 38.964215] ? mas_walk+0x5c7/0x7c0 [ 38.964709] do_vmi_munmap+0x1f1/0x2b0 [ 38.965206] mmap_region+0x1f9/0x2660 [ 38.965687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.966197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.966905] ? __pfx_lock_acquire+0x10/0x10 [ 38.967439] ? __pfx_mmap_region+0x10/0x10 [ 38.967966] ? security_mmap_addr+0x7d/0xa0 [ 38.968497] ? get_unmapped_area+0x1f5/0x3f0 [ 38.969054] do_mmap+0x854/0xf00 [ 38.969493] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.969988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.970551] ksys_mmap_pgoff+0x3af/0x500 [ 38.971061] do_syscall_64+0x3f/0x90 [ 38.971540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972188] RIP: 0033:0x7f0c79494d82 [ 38.972663] 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 [ 38.974759] RSP: 002b:00007fff08badcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.975660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c79494d82 [ 38.976641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c788ce000 [ 38.977506] RBP: 00007f0c788ce000 R08: 0000000000000009 R09: 0000000000001000 [ 38.978358] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565c8092ec0 [ 38.979212] R13: 00007fff08badcf0 R14: 00007fff08badd20 R15: 00007fff08bae080 [ 38.980067] [ 38.980362] [ 38.980583] Allocated by task 213: [ 38.981018] kasan_save_stack+0x22/0x50 [ 38.981525] kasan_set_track+0x25/0x30 [ 38.982017] __kasan_slab_alloc+0x59/0x70 [ 38.982538] kmem_cache_alloc+0x16b/0x370 [ 38.983053] vm_area_dup+0x20/0x160 [ 38.983505] __split_vma+0x170/0x950 [ 38.983966] split_vma+0xc6/0x110 [ 38.984408] mprotect_fixup+0x8d2/0xb30 [ 38.984926] do_mprotect_pkey+0x87e/0xd40 [ 38.985450] __x64_sys_mprotect+0x78/0xc0 [ 38.985971] do_syscall_64+0x3f/0x90 [ 38.986444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987082] [ 38.987298] Freed by task 213: [ 38.987699] kasan_save_stack+0x22/0x50 [ 38.988203] kasan_set_track+0x25/0x30 [ 38.988710] kasan_save_free_info+0x2b/0x50 [ 38.989243] __kasan_slab_free+0x10a/0x190 [ 38.989776] kmem_cache_free+0x10d/0x4d0 [ 38.990280] rcu_core+0x8c8/0x2860 [ 38.990726] __do_softirq+0x1b7/0x7d4 [ 38.991200] [ 38.991416] Last potentially related work creation: [ 38.992000] kasan_save_stack+0x22/0x50 [ 38.992498] __kasan_record_aux_stack+0x8e/0xa0 [ 38.993084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.993738] remove_vma+0x139/0x170 [ 38.994184] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.994742] do_vmi_munmap+0x1f1/0x2b0 [ 38.995227] __vm_munmap+0x138/0x3a0 [ 38.995693] __x64_sys_munmap+0x59/0x80 [ 38.996186] do_syscall_64+0x3f/0x90 [ 38.996671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.997316] [ 38.997534] The buggy address belongs to the object at ffff88800ebc0658 [ 38.997534] which belongs to the cache vm_area_struct of size 168 [ 38.998984] The buggy address is located 88 bytes inside of [ 38.998984] freed 168-byte region [ffff88800ebc0658, ffff88800ebc0700) [ 39.000410] [ 39.000660] The buggy address belongs to the physical page: [ 39.001323] page:000000000a3de255 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebc0 [ 39.002389] memcg:ffff88800ebb9101 [ 39.002808] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.003450] page_type: 0xffffffff() [ 39.003897] raw: 0100000000000200 ffff88800879fc80 ffffea00003aecc0 dead000000000002 [ 39.004826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb9101 [ 39.005726] page dumped because: kasan: bad access detected [ 39.006379] [ 39.006595] Memory state around the buggy address: [ 39.007172] ffff88800ebc0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.008017] ffff88800ebc0600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.008884] >ffff88800ebc0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.009727] ^ [ 39.010305] ffff88800ebc0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.011154] ffff88800ebc0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.012004] ================================================================== [ 39.012967] Disabling lock debugging due to kernel taint [ 40.917414] BUG: Bad rss-counter state mm:000000001fc19e9b type:MM_FILEPAGES val:33 [ 40.918411] BUG: Bad rss-counter state mm:000000001fc19e9b type:MM_ANONPAGES val:22 [ 41.421040] BUG: Bad rss-counter state mm:00000000c14b28ff type:MM_FILEPAGES val:33 [ 41.422233] BUG: Bad rss-counter state mm:00000000c14b28ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50189' (ECDSA) to the list of known hosts. 2023/06/19 21:42:02 fuzzer started 2023/06/19 21:42:02 dialing manager at localhost:44161 2023/06/19 21:42:03 checking machine... 2023/06/19 21:42:03 checking revisions... [ 42.144757] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:42:03 testing simple program... [ 42.196441] cgroup: Unknown subsys name 'net' [ 42.249800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:59 Registers: info registers vcpu 0 RAX=1ffff110019a2969 RBX=ffff88800cd14b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cd14b48 RBP=ffff88800ccf9000 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800ccf4f00 R14=ffffffff8186b9c5 R15=ffff888016ae7a00 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007fff99acd7d8 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=00007f731a97f510000055f18631c790 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=ffff888019f37cd0 RCX=ffff888019f37000 RDX=0000000000000080 RSI=ffff888019f37be0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6c88 R12=ffff88800844f780 R13=ffffea00003a6cc0 R14=ffffffff813782a8 R15=ffff88800e9b3450 RIP=ffffffff8180ee70 RFL=00000282 [--S----] 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 00007f441e5b3900 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=00007f441dad3000 CR3=000000000d77a000 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=b3285ca56c489dff000000000010ec78 XMM01=d59e07bde36eea69000000000011d508 XMM02=ec2efd57dc4c00df000000000011d610 XMM03=9bde6757476364c4000000000011d6e0 XMM04=be8a76f2197978b000000000000ae988 XMM05=560a2c6d7800c5d50000000000134e18 XMM06=3325e8eb6b98593f0000000000133848 XMM07=fb795ef6d65770560000000000124040 XMM08=2c67c8bc2e329bc3000000000011d680 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000