syzkaller login: [ 38.594255] BUG: Bad rss-counter state mm:000000007688e8af type:MM_FILEPAGES val:33 [ 38.594828] BUG: Bad rss-counter state mm:000000007688e8af type:MM_ANONPAGES val:22 [ 38.699797] ================================================================== [ 38.700977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.702154] Read of size 8 at addr ffff88800dccb880 by task sshd/227 [ 38.703326] [ 38.703516] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.704010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.704585] Call Trace: [ 38.704801] [ 38.704972] dump_stack_lvl+0x91/0xf0 [ 38.705264] print_report+0xcc/0x620 [ 38.705550] ? __virt_addr_valid+0x102/0x340 [ 38.705881] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.706245] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.706611] kasan_report+0xbe/0xf0 [ 38.706891] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.707257] vma_interval_tree_remove+0xc75/0xec0 [ 38.707607] vma_prepare+0xc54/0x11a0 [ 38.707895] __split_vma+0x5af/0x950 [ 38.708179] ? __pfx___split_vma+0x10/0x10 [ 38.708480] ? find_held_lock+0x2c/0x110 [ 38.708778] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.709109] ? lock_is_held_type+0x9f/0x120 [ 38.709429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.709782] ? mtree_range_walk+0x632/0x900 [ 38.710107] ? mas_walk+0x5c7/0x7c0 [ 38.710392] do_vmi_munmap+0x1f1/0x2b0 [ 38.710685] mmap_region+0x1f9/0x2660 [ 38.710975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.711311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.711728] ? __pfx_lock_acquire+0x10/0x10 [ 38.712059] ? __pfx_mmap_region+0x10/0x10 [ 38.712381] ? security_mmap_addr+0x7d/0xa0 [ 38.712707] ? get_unmapped_area+0x1f5/0x3f0 [ 38.713042] do_mmap+0x854/0xf00 [ 38.713311] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.713606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.713947] ksys_mmap_pgoff+0x3af/0x500 [ 38.714253] do_syscall_64+0x3f/0x90 [ 38.714544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.714925] RIP: 0033:0x7ff2cb40fd82 [ 38.715226] 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 [ 38.716567] RSP: 002b:00007ffd475903c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.717125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2cb40fd82 [ 38.717655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2ca849000 [ 38.718182] RBP: 00007ff2ca849000 R08: 0000000000000009 R09: 0000000000001000 [ 38.718715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd1db13ec0 [ 38.719264] R13: 00007ffd475903e0 R14: 00007ffd47590410 R15: 00007ffd47590770 [ 38.719793] [ 38.719973] [ 38.720102] Allocated by task 220: [ 38.720366] kasan_save_stack+0x22/0x50 [ 38.720678] kasan_set_track+0x25/0x30 [ 38.720983] __kasan_slab_alloc+0x59/0x70 [ 38.721313] kmem_cache_alloc+0x16b/0x370 [ 38.721632] vm_area_dup+0x20/0x160 [ 38.721916] __split_vma+0x170/0x950 [ 38.722207] split_vma+0xc6/0x110 [ 38.722484] mprotect_fixup+0x8d2/0xb30 [ 38.722795] do_mprotect_pkey+0x87e/0xd40 [ 38.723122] __x64_sys_mprotect+0x78/0xc0 [ 38.723441] do_syscall_64+0x3f/0x90 [ 38.723735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.724131] [ 38.724268] Freed by task 220: [ 38.724511] kasan_save_stack+0x22/0x50 [ 38.724824] kasan_set_track+0x25/0x30 [ 38.725125] kasan_save_free_info+0x2b/0x50 [ 38.725452] __kasan_slab_free+0x10a/0x190 [ 38.725801] kmem_cache_free+0x10d/0x4d0 [ 38.726148] rcu_core+0x8c8/0x2860 [ 38.726447] __do_softirq+0x1b7/0x7d4 [ 38.726746] [ 38.726880] Last potentially related work creation: [ 38.727275] kasan_save_stack+0x22/0x50 [ 38.727588] __kasan_record_aux_stack+0x8e/0xa0 [ 38.727950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.728354] remove_vma+0x139/0x170 [ 38.728639] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.728989] do_vmi_munmap+0x1f1/0x2b0 [ 38.729297] __vm_munmap+0x138/0x3a0 [ 38.729586] __x64_sys_munmap+0x59/0x80 [ 38.729897] do_syscall_64+0x3f/0x90 [ 38.730193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.730606] [ 38.730737] The buggy address belongs to the object at ffff88800dccb828 [ 38.730737] which belongs to the cache vm_area_struct of size 168 [ 38.731689] The buggy address is located 88 bytes inside of [ 38.731689] freed 168-byte region [ffff88800dccb828, ffff88800dccb8d0) [ 38.732602] [ 38.732741] The buggy address belongs to the physical page: [ 38.733155] page:000000002e55c7b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdccb [ 38.733829] memcg:ffff88800e0b7401 [ 38.734088] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.734499] page_type: 0xffffffff() [ 38.734777] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.735364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0b7401 [ 38.735953] page dumped because: kasan: bad access detected [ 38.736377] [ 38.736510] Memory state around the buggy address: [ 38.736873] ffff88800dccb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.737422] ffff88800dccb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.737959] >ffff88800dccb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.738506] ^ [ 38.738774] ffff88800dccb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.739339] ffff88800dccb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.739878] ================================================================== [ 38.740482] Disabling lock debugging due to kernel taint [ 40.417234] BUG: Bad rss-counter state mm:00000000a7fa66a0 type:MM_FILEPAGES val:33 [ 40.417985] BUG: Bad rss-counter state mm:00000000a7fa66a0 type:MM_ANONPAGES val:22 [ 40.999562] BUG: Bad rss-counter state mm:00000000aa5dc9dc type:MM_FILEPAGES val:33 [ 41.000718] BUG: Bad rss-counter state mm:00000000aa5dc9dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35192' (ECDSA) to the list of known hosts. 2023/06/20 05:39:52 fuzzer started 2023/06/20 05:39:52 dialing manager at localhost:44161 2023/06/20 05:39:52 checking machine... 2023/06/20 05:39:52 checking revisions... [ 41.595401] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:39:52 testing simple program... [ 41.639730] cgroup: Unknown subsys name 'net' [ 41.692255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:39:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856528e0 RCX=ffffffff814c8421 RDX=ffff888016a93680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801cc2f850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fac781f3477 R13=0000000000000000 R14=ffff888016a93680 R15=0000000000092c40 RIP=ffffffff814c07eb 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 00007fac77d00900 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=00007fac782b5650 CR3=0000000016012000 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=ffffffff856d8220 RCX=ffffffff812e00d6 RDX=00000000ffffffff RSI=0000000000000004 RDI=ffffffff856d8220 RBP=1ffff1100d9e13a7 RSP=ffff88806cf09d28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff856d8228 R13=ffffffff856d8230 R14=ffffffff8186b9c5 R15=ffff88800d90ac80 RIP=ffffffff8180fd58 RFL=00000082 [--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 0000000000000000 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=00007efd4f234530 CR3=0000000010266000 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=2031353a39333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a39333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000