syzkaller login: [ 30.834467] BUG: Bad rss-counter state mm:0000000084b2b8f7 type:MM_FILEPAGES val:33 [ 30.835856] BUG: Bad rss-counter state mm:0000000084b2b8f7 type:MM_ANONPAGES val:22 [ 30.986545] ================================================================== [ 30.987960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.989616] Read of size 8 at addr ffff88800f77b140 by task sshd/219 [ 30.990821] [ 30.991150] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.993796] Call Trace: [ 30.994237] [ 30.994614] dump_stack_lvl+0x91/0xf0 [ 30.995277] print_report+0xcc/0x620 [ 30.995929] ? __virt_addr_valid+0x102/0x340 [ 30.996675] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998365] kasan_report+0xbe/0xf0 [ 30.998995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999842] vma_interval_tree_remove+0xc75/0xec0 [ 31.000677] vma_prepare+0xc54/0x11a0 [ 31.001349] __split_vma+0x5af/0x950 [ 31.001999] ? __pfx___split_vma+0x10/0x10 [ 31.002729] ? find_held_lock+0x2c/0x110 [ 31.003442] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.004219] ? lock_is_held_type+0x9f/0x120 [ 31.004965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.005817] ? mtree_range_walk+0x632/0x900 [ 31.006587] ? mas_walk+0x5c7/0x7c0 [ 31.007234] do_vmi_munmap+0x1f1/0x2b0 [ 31.007898] mmap_region+0x1f9/0x2660 [ 31.008556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.009277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.010266] ? __pfx_lock_acquire+0x10/0x10 [ 31.010996] ? __pfx_mmap_region+0x10/0x10 [ 31.011714] ? security_mmap_addr+0x7d/0xa0 [ 31.012459] ? get_unmapped_area+0x1f5/0x3f0 [ 31.013237] do_mmap+0x854/0xf00 [ 31.013833] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.014507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.015291] ksys_mmap_pgoff+0x3af/0x500 [ 31.015994] do_syscall_64+0x3f/0x90 [ 31.016656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.017553] RIP: 0033:0x7f856397dd82 [ 31.018188] 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 [ 31.020833] RSP: 002b:00007ffef93ed698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.021872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f856397dd82 [ 31.022818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8562db7000 [ 31.023767] RBP: 00007f8562db7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.024723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a85d706ec0 [ 31.025696] R13: 00007ffef93ed6b0 R14: 00007ffef93ed6e0 R15: 00007ffef93eda40 [ 31.026665] [ 31.026995] [ 31.027242] Allocated by task 212: [ 31.027734] kasan_save_stack+0x22/0x50 [ 31.028335] kasan_set_track+0x25/0x30 [ 31.028931] __kasan_slab_alloc+0x59/0x70 [ 31.029566] kmem_cache_alloc+0x16b/0x370 [ 31.030188] vm_area_dup+0x20/0x160 [ 31.030824] __split_vma+0x170/0x950 [ 31.031386] split_vma+0xc6/0x110 [ 31.031924] mprotect_fixup+0x8d2/0xb30 [ 31.032511] do_mprotect_pkey+0x87e/0xd40 [ 31.033117] __x64_sys_mprotect+0x78/0xc0 [ 31.033759] do_syscall_64+0x3f/0x90 [ 31.034333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035104] [ 31.035361] Freed by task 202: [ 31.035837] kasan_save_stack+0x22/0x50 [ 31.036437] kasan_set_track+0x25/0x30 [ 31.037032] kasan_save_free_info+0x2b/0x50 [ 31.037685] __kasan_slab_free+0x10a/0x190 [ 31.038334] kmem_cache_free+0x10d/0x4d0 [ 31.038944] rcu_core+0x8c8/0x2860 [ 31.039479] __do_softirq+0x1b7/0x7d4 [ 31.040043] [ 31.040298] Last potentially related work creation: [ 31.041011] kasan_save_stack+0x22/0x50 [ 31.041641] __kasan_record_aux_stack+0x8e/0xa0 [ 31.042346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.043109] remove_vma+0x139/0x170 [ 31.043644] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.044321] do_vmi_munmap+0x1f1/0x2b0 [ 31.044906] __vm_munmap+0x138/0x3a0 [ 31.045489] __x64_sys_munmap+0x59/0x80 [ 31.046091] do_syscall_64+0x3f/0x90 [ 31.046665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.047445] [ 31.047705] The buggy address belongs to the object at ffff88800f77b0e8 [ 31.047705] which belongs to the cache vm_area_struct of size 168 [ 31.049501] The buggy address is located 88 bytes inside of [ 31.049501] freed 168-byte region [ffff88800f77b0e8, ffff88800f77b190) [ 31.051224] [ 31.051485] The buggy address belongs to the physical page: [ 31.052289] page:000000000ecefcb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf77b [ 31.053635] memcg:ffff88800deb1c01 [ 31.054156] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.054958] page_type: 0xffffffff() [ 31.055525] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.056661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deb1c01 [ 31.057801] page dumped because: kasan: bad access detected [ 31.058623] [ 31.058883] Memory state around the buggy address: [ 31.059592] ffff88800f77b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.060652] ffff88800f77b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.061708] >ffff88800f77b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.062751] ^ [ 31.063442] ffff88800f77b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.064301] ffff88800f77b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.065146] ================================================================== [ 31.066116] Disabling lock debugging due to kernel taint [ 33.325537] BUG: Bad rss-counter state mm:0000000033286afe type:MM_FILEPAGES val:33 [ 33.326615] BUG: Bad rss-counter state mm:0000000033286afe type:MM_ANONPAGES val:22 [ 33.817165] BUG: Bad rss-counter state mm:000000008f24f622 type:MM_FILEPAGES val:33 [ 33.818349] BUG: Bad rss-counter state mm:000000008f24f622 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56789' (ECDSA) to the list of known hosts. 2023/06/20 11:38:19 fuzzer started 2023/06/20 11:38:19 dialing manager at localhost:36067 2023/06/20 11:38:19 checking machine... 2023/06/20 11:38:19 checking revisions... [ 34.520237] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:38:19 testing simple program... [ 34.572062] cgroup: Unknown subsys name 'net' [ 34.618585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:38:18 Registers: info registers vcpu 0 RAX=1ffff110028af94e RBX=0000000000000000 RCX=ffffffff8364da69 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801457ca74 RBP=ffff88801457ca74 RSP=ffff888015d77a28 R8 =0000000000000000 R9 =ffffed10028af94e R10=ffff88801457ca77 R11=0000000000000000 R12=7fffffffffffffff R13=ffff88801457c800 R14=ffff888015d77c48 R15=dffffc0000000000 RIP=ffffffff8364da75 RFL=00000217 [----APC] 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 00007f08a60e6900 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=00007f08a669b650 CR3=0000000009efe000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a98 RCX=ffffffff860f2801 RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a80 R8 =ffffffff860f284c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000151d9 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800ef8b680 R15=ffff88800d26ed80 RIP=ffffffff81130368 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 00007f7522055900 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=00007f7521499fd0 CR3=000000000cb2c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e1fff4636b799f7d00000000000ae988 XMM05=4b9d94c42bf445a70000000000132468 XMM06=806171799158d9670000000000131258 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000