syzkaller login: [ 60.267871] sshd (213) used greatest stack depth: 24120 bytes left [ 60.271721] BUG: Bad rss-counter state mm:00000000f0a19440 type:MM_FILEPAGES val:33 [ 60.273397] BUG: Bad rss-counter state mm:00000000f0a19440 type:MM_ANONPAGES val:22 [ 60.465052] ================================================================== [ 60.466023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.466974] Read of size 8 at addr ffff88801c02ced8 by task sshd/222 [ 60.467758] [ 60.467982] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.468964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.469980] Call Trace: [ 60.470306] [ 60.470597] dump_stack_lvl+0x91/0xf0 [ 60.471087] print_report+0xcc/0x620 [ 60.471578] ? __virt_addr_valid+0x102/0x340 [ 60.472136] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.472760] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.473392] kasan_report+0xbe/0xf0 [ 60.473878] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.474506] vma_interval_tree_remove+0xc75/0xec0 [ 60.475107] vma_prepare+0xc54/0x11a0 [ 60.475593] __split_vma+0x5af/0x950 [ 60.476073] ? __pfx___split_vma+0x10/0x10 [ 60.476613] ? find_held_lock+0x2c/0x110 [ 60.477143] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.477726] ? lock_is_held_type+0x9f/0x120 [ 60.478277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.478896] ? mtree_range_walk+0x632/0x900 [ 60.479459] ? mas_walk+0x5c7/0x7c0 [ 60.479944] do_vmi_munmap+0x1f1/0x2b0 [ 60.480443] mmap_region+0x1f9/0x2660 [ 60.480935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.481469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.482206] ? __pfx_lock_acquire+0x10/0x10 [ 60.482751] ? __pfx_mmap_region+0x10/0x10 [ 60.483288] ? security_mmap_addr+0x7d/0xa0 [ 60.483822] ? get_unmapped_area+0x1f5/0x3f0 [ 60.484378] do_mmap+0x854/0xf00 [ 60.484819] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.485329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.485896] ksys_mmap_pgoff+0x3af/0x500 [ 60.486412] do_syscall_64+0x3f/0x90 [ 60.486903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.487554] RIP: 0033:0x7f441dc00d82 [ 60.488022] 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 [ 60.490149] RSP: 002b:00007fff24510d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.491054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f441dc00d82 [ 60.491904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f441d03a000 [ 60.492746] RBP: 00007f441d03a000 R08: 0000000000000009 R09: 0000000000001000 [ 60.493616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adb9668ec0 [ 60.494464] R13: 00007fff24510da0 R14: 00007fff24510dd0 R15: 00007fff24511130 [ 60.495328] [ 60.495623] [ 60.495839] Allocated by task 213: [ 60.496269] kasan_save_stack+0x22/0x50 [ 60.496775] kasan_set_track+0x25/0x30 [ 60.497272] __kasan_slab_alloc+0x59/0x70 [ 60.497804] kmem_cache_alloc+0x16b/0x370 [ 60.498327] vm_area_dup+0x20/0x160 [ 60.498792] __split_vma+0x170/0x950 [ 60.499266] split_vma+0xc6/0x110 [ 60.499711] mprotect_fixup+0x8d2/0xb30 [ 60.500227] do_mprotect_pkey+0x87e/0xd40 [ 60.500770] __x64_sys_mprotect+0x78/0xc0 [ 60.501298] do_syscall_64+0x3f/0x90 [ 60.501797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.502446] [ 60.502669] Freed by task 213: [ 60.503067] kasan_save_stack+0x22/0x50 [ 60.503576] kasan_set_track+0x25/0x30 [ 60.504073] kasan_save_free_info+0x2b/0x50 [ 60.504611] __kasan_slab_free+0x10a/0x190 [ 60.505156] kmem_cache_free+0x10d/0x4d0 [ 60.505682] rcu_core+0x8c8/0x2860 [ 60.506131] __do_softirq+0x1b7/0x7d4 [ 60.506612] [ 60.506835] Last potentially related work creation: [ 60.507444] kasan_save_stack+0x22/0x50 [ 60.507972] __kasan_record_aux_stack+0x8e/0xa0 [ 60.508572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.509256] remove_vma+0x139/0x170 [ 60.509744] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.510324] do_vmi_munmap+0x1f1/0x2b0 [ 60.510829] __vm_munmap+0x138/0x3a0 [ 60.511315] __x64_sys_munmap+0x59/0x80 [ 60.511834] do_syscall_64+0x3f/0x90 [ 60.512337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.513015] [ 60.513240] The buggy address belongs to the object at ffff88801c02ce80 [ 60.513240] which belongs to the cache vm_area_struct of size 168 [ 60.514807] The buggy address is located 88 bytes inside of [ 60.514807] freed 168-byte region [ffff88801c02ce80, ffff88801c02cf28) [ 60.516292] [ 60.516520] The buggy address belongs to the physical page: [ 60.517206] page:0000000099995326 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c02c [ 60.518366] memcg:ffff88800fc99b01 [ 60.518815] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.519509] page_type: 0xffffffff() [ 60.519980] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.520944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc99b01 [ 60.521909] page dumped because: kasan: bad access detected [ 60.522606] [ 60.522828] Memory state around the buggy address: [ 60.523438] ffff88801c02cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.524343] ffff88801c02ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.525238] >ffff88801c02ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.526144] ^ [ 60.526905] ffff88801c02cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.527796] ffff88801c02cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.528693] ================================================================== [ 60.529761] Disabling lock debugging due to kernel taint [ 63.217625] BUG: Bad rss-counter state mm:000000000b1565e4 type:MM_FILEPAGES val:33 [ 63.218619] BUG: Bad rss-counter state mm:000000000b1565e4 type:MM_ANONPAGES val:22 [ 63.751463] BUG: Bad rss-counter state mm:00000000463577b7 type:MM_FILEPAGES val:33 [ 63.752624] BUG: Bad rss-counter state mm:00000000463577b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1931' (ECDSA) to the list of known hosts. 2023/06/21 07:39:36 fuzzer started 2023/06/21 07:39:37 dialing manager at localhost:36067 2023/06/21 07:39:37 checking machine... 2023/06/21 07:39:37 checking revisions... [ 64.388095] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:39:37 testing simple program... [ 64.448969] cgroup: Unknown subsys name 'net' [ 64.499897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:36 Registers: info registers vcpu 0 RAX=ffffffff8113b95b RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110018a4ea0 RSI=ffffffff8113b95b RDI=ffff88800c527570 RBP=ffff88800c527540 RSP=ffff88800c5274a0 R8 =0000000000000001 R9 =ffff88800c5274e8 R10=0000000000038001 R11=000000000001ddb6 R12=ffff88800c527570 R13=0000000000000000 R14=ffff88800f6e0000 R15=0000000000000000 RIP=ffffffff813ad470 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 00007f187f142900 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=00007f187e535070 CR3=000000000dabc000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a34477eb51f4ce2b00000000000ae988 XMM05=594fd69c227c412a00000000001329f8 XMM06=4fda316b135da52b0000000000131a98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e7 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000000fb RSI=ffff8880098c7a00 RDI=ffff8880098c7a00 RBP=ffffffff8366b8df RSP=ffff888019877918 R8 =0000000000000140 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880098c7a00 R13=ffff888008fae000 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff8180ca47 RFL=00000206 [-----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 00007fc7aac9b900 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=00007fc7ab252618 CR3=000000001c248000 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=563412feff00545000000000000080fe 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