syzkaller login: [ 31.404302] BUG: Bad rss-counter state mm:0000000000ce36bd type:MM_FILEPAGES val:33 [ 31.405288] BUG: Bad rss-counter state mm:0000000000ce36bd type:MM_ANONPAGES val:22 [ 31.531332] ================================================================== [ 31.532164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.533029] Read of size 8 at addr ffff88800eb4fdf0 by task sshd/220 [ 31.533863] [ 31.534060] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.534850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.535789] Call Trace: [ 31.536075] [ 31.536330] dump_stack_lvl+0x91/0xf0 [ 31.536773] print_report+0xcc/0x620 [ 31.537209] ? __virt_addr_valid+0x102/0x340 [ 31.537716] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.538234] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.538703] kasan_report+0xbe/0xf0 [ 31.539015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.539418] vma_interval_tree_remove+0xc75/0xec0 [ 31.539805] vma_prepare+0xc54/0x11a0 [ 31.540122] __split_vma+0x5af/0x950 [ 31.540428] ? __pfx___split_vma+0x10/0x10 [ 31.540769] ? find_held_lock+0x2c/0x110 [ 31.541112] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.541479] ? lock_is_held_type+0x9f/0x120 [ 31.541832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.542229] ? mtree_range_walk+0x632/0x900 [ 31.542595] ? mas_walk+0x5c7/0x7c0 [ 31.542903] do_vmi_munmap+0x1f1/0x2b0 [ 31.543223] mmap_region+0x1f9/0x2660 [ 31.543539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.543871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.544337] ? __pfx_lock_acquire+0x10/0x10 [ 31.544684] ? __pfx_mmap_region+0x10/0x10 [ 31.545033] ? security_mmap_addr+0x7d/0xa0 [ 31.545376] ? get_unmapped_area+0x1f5/0x3f0 [ 31.545739] do_mmap+0x854/0xf00 [ 31.546041] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.546368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.546734] ksys_mmap_pgoff+0x3af/0x500 [ 31.547064] do_syscall_64+0x3f/0x90 [ 31.547379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547797] RIP: 0033:0x7f83a60d9d82 [ 31.548095] 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 [ 31.549464] RSP: 002b:00007ffd57311818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.550126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83a60d9d82 [ 31.550758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83a5513000 [ 31.551381] RBP: 00007f83a5513000 R08: 0000000000000009 R09: 0000000000001000 [ 31.552003] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb03e5fb20 [ 31.552625] R13: 00007ffd57311830 R14: 00007ffd57311860 R15: 00007ffd57311bc0 [ 31.553239] [ 31.553460] [ 31.553616] Allocated by task 213: [ 31.553929] kasan_save_stack+0x22/0x50 [ 31.554307] kasan_set_track+0x25/0x30 [ 31.554670] __kasan_slab_alloc+0x59/0x70 [ 31.555045] kmem_cache_alloc+0x16b/0x370 [ 31.555414] vm_area_dup+0x20/0x160 [ 31.555739] __split_vma+0x170/0x950 [ 31.556073] split_vma+0xc6/0x110 [ 31.556396] mprotect_fixup+0x8d2/0xb30 [ 31.556765] do_mprotect_pkey+0x87e/0xd40 [ 31.557142] __x64_sys_mprotect+0x78/0xc0 [ 31.557523] do_syscall_64+0x3f/0x90 [ 31.557869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558341] [ 31.558494] Freed by task 0: [ 31.558771] kasan_save_stack+0x22/0x50 [ 31.559125] kasan_set_track+0x25/0x30 [ 31.559476] kasan_save_free_info+0x2b/0x50 [ 31.559860] __kasan_slab_free+0x10a/0x190 [ 31.560269] kmem_cache_free+0x10d/0x4d0 [ 31.560635] rcu_core+0x8c8/0x2860 [ 31.560964] __do_softirq+0x1b7/0x7d4 [ 31.561291] [ 31.561434] Last potentially related work creation: [ 31.561822] kasan_save_stack+0x22/0x50 [ 31.562151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.562535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.562974] remove_vma+0x139/0x170 [ 31.563277] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.563657] do_vmi_munmap+0x1f1/0x2b0 [ 31.563985] __vm_munmap+0x138/0x3a0 [ 31.564291] __x64_sys_munmap+0x59/0x80 [ 31.564629] do_syscall_64+0x3f/0x90 [ 31.564951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.565366] [ 31.565514] The buggy address belongs to the object at ffff88800eb4fd98 [ 31.565514] which belongs to the cache vm_area_struct of size 168 [ 31.566488] The buggy address is located 88 bytes inside of [ 31.566488] freed 168-byte region [ffff88800eb4fd98, ffff88800eb4fe40) [ 31.567396] [ 31.567544] The buggy address belongs to the physical page: [ 31.567979] page:000000001586b9a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb4f [ 31.568683] memcg:ffff8880133fec01 [ 31.568959] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.569383] page_type: 0xffffffff() [ 31.569683] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.570301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880133fec01 [ 31.570900] page dumped because: kasan: bad access detected [ 31.571329] [ 31.571470] Memory state around the buggy address: [ 31.571854] ffff88800eb4fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.572413] ffff88800eb4fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.572969] >ffff88800eb4fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.573519] ^ [ 31.574048] ffff88800eb4fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.574609] ffff88800eb4fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.575269] ================================================================== [ 31.575896] Disabling lock debugging due to kernel taint [ 34.329031] BUG: Bad rss-counter state mm:0000000003c09360 type:MM_FILEPAGES val:33 [ 34.330027] BUG: Bad rss-counter state mm:0000000003c09360 type:MM_ANONPAGES val:22 [ 34.918263] BUG: Bad rss-counter state mm:00000000453108ce type:MM_FILEPAGES val:33 [ 34.919425] BUG: Bad rss-counter state mm:00000000453108ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61137' (ECDSA) to the list of known hosts. 2023/06/21 07:22:40 fuzzer started 2023/06/21 07:22:41 dialing manager at localhost:36067 2023/06/21 07:22:41 checking machine... 2023/06/21 07:22:41 checking revisions... [ 35.622648] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:22:41 testing simple program... [ 35.677630] cgroup: Unknown subsys name 'net' [ 35.732751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f2b822fa2fd RSP=ffff88806ce09a28 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f2b822fa000 R11=00000000000b6a61 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800e70d1c0 R15=ffff888019caa400 RIP=ffffffff8135b955 RFL=00000286 [--S--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 00007f2b81a30900 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=0000557da0d28768 CR3=000000000f6be000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=388f43d7e5de05ec00000000000ae988 XMM05=acda70d1d32bfc0b0000000000133788 XMM06=0ee4816ab32a19100000000000132830 XMM07=fb795ef6d65770560000000000122a78 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002c83f1c RSI=ffffffff83632183 RDI=ffff88801641f950 RBP=ffff88801641f920 RSP=ffff88801641f880 R8 =0000000000000001 R9 =ffff88801641f8c8 R10=0000000000038001 R11=00000000000229e6 R12=ffff88801641f950 R13=0000000000000000 R14=ffff8880166e1b40 R15=0000000000092cc0 RIP=ffffffff813ad47e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f36009ee900 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=00007f3600fa3650 CR3=0000000009074000 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=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