syzkaller login: [ 43.903375] BUG: Bad rss-counter state mm:00000000b2add2dc type:MM_FILEPAGES val:33 [ 43.904711] BUG: Bad rss-counter state mm:00000000b2add2dc type:MM_ANONPAGES val:22 [ 44.090167] ================================================================== [ 44.091074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.091995] Read of size 8 at addr ffff88800f093228 by task sshd/219 [ 44.092904] [ 44.093118] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.093966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.094955] Call Trace: [ 44.095272] [ 44.095555] dump_stack_lvl+0x91/0xf0 [ 44.096039] print_report+0xcc/0x620 [ 44.096543] ? __virt_addr_valid+0x102/0x340 [ 44.097081] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.097689] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.098297] kasan_report+0xbe/0xf0 [ 44.098765] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.099375] vma_interval_tree_remove+0xc75/0xec0 [ 44.099965] vma_prepare+0xc54/0x11a0 [ 44.100432] __split_vma+0x5af/0x950 [ 44.100905] ? __pfx___split_vma+0x10/0x10 [ 44.101429] ? find_held_lock+0x2c/0x110 [ 44.101945] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.102504] ? lock_is_held_type+0x9f/0x120 [ 44.103032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.103634] ? mtree_range_walk+0x632/0x900 [ 44.104183] ? mas_walk+0x5c7/0x7c0 [ 44.104666] do_vmi_munmap+0x1f1/0x2b0 [ 44.105148] mmap_region+0x1f9/0x2660 [ 44.105627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.106132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.106839] ? __pfx_lock_acquire+0x10/0x10 [ 44.107363] ? __pfx_mmap_region+0x10/0x10 [ 44.107886] ? security_mmap_addr+0x7d/0xa0 [ 44.108410] ? get_unmapped_area+0x1f5/0x3f0 [ 44.108996] do_mmap+0x854/0xf00 [ 44.109434] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.109918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.110472] ksys_mmap_pgoff+0x3af/0x500 [ 44.110978] do_syscall_64+0x3f/0x90 [ 44.111451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.112094] RIP: 0033:0x7faaf3558d82 [ 44.112558] 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 [ 44.114653] RSP: 002b:00007ffd96d4bc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.115543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaf3558d82 [ 44.116386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaf2992000 [ 44.117231] RBP: 00007faaf2992000 R08: 0000000000000009 R09: 0000000000001000 [ 44.118066] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c3d777d90 [ 44.118895] R13: 00007ffd96d4bca0 R14: 00007ffd96d4bcd0 R15: 00007ffd96d4c030 [ 44.119734] [ 44.120020] [ 44.120231] Allocated by task 212: [ 44.120682] kasan_save_stack+0x22/0x50 [ 44.121180] kasan_set_track+0x25/0x30 [ 44.121670] __kasan_slab_alloc+0x59/0x70 [ 44.122181] kmem_cache_alloc+0x16b/0x370 [ 44.122688] vm_area_dup+0x20/0x160 [ 44.123136] __split_vma+0x170/0x950 [ 44.123592] split_vma+0xc6/0x110 [ 44.124023] mprotect_fixup+0x8d2/0xb30 [ 44.124527] do_mprotect_pkey+0x87e/0xd40 [ 44.125035] __x64_sys_mprotect+0x78/0xc0 [ 44.125546] do_syscall_64+0x3f/0x90 [ 44.126011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.126635] [ 44.126847] Freed by task 212: [ 44.127234] kasan_save_stack+0x22/0x50 [ 44.127730] kasan_set_track+0x25/0x30 [ 44.128219] kasan_save_free_info+0x2b/0x50 [ 44.128762] __kasan_slab_free+0x10a/0x190 [ 44.129280] kmem_cache_free+0x10d/0x4d0 [ 44.129782] rcu_core+0x8c8/0x2860 [ 44.130215] __do_softirq+0x1b7/0x7d4 [ 44.130685] [ 44.130897] Last potentially related work creation: [ 44.131468] kasan_save_stack+0x22/0x50 [ 44.131963] __kasan_record_aux_stack+0x8e/0xa0 [ 44.132537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.133162] remove_vma+0x139/0x170 [ 44.133603] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.134156] do_vmi_munmap+0x1f1/0x2b0 [ 44.134639] __vm_munmap+0x138/0x3a0 [ 44.135096] __x64_sys_munmap+0x59/0x80 [ 44.135580] do_syscall_64+0x3f/0x90 [ 44.136044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.136693] [ 44.136906] The buggy address belongs to the object at ffff88800f0931d0 [ 44.136906] which belongs to the cache vm_area_struct of size 168 [ 44.138344] The buggy address is located 88 bytes inside of [ 44.138344] freed 168-byte region [ffff88800f0931d0, ffff88800f093278) [ 44.139723] [ 44.139938] The buggy address belongs to the physical page: [ 44.140597] page:0000000013363d11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf093 [ 44.141655] memcg:ffff88800ee7f901 [ 44.142075] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.142712] page_type: 0xffffffff() [ 44.143151] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.144054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee7f901 [ 44.144955] page dumped because: kasan: bad access detected [ 44.145603] [ 44.145813] Memory state around the buggy address: [ 44.146380] ffff88800f093100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.147211] ffff88800f093180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.148055] >ffff88800f093200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.148896] ^ [ 44.149445] ffff88800f093280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.150285] ffff88800f093300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.151127] ================================================================== [ 44.152371] Disabling lock debugging due to kernel taint [ 46.515813] BUG: Bad rss-counter state mm:000000006ccf4b18 type:MM_FILEPAGES val:33 [ 46.517106] BUG: Bad rss-counter state mm:000000006ccf4b18 type:MM_ANONPAGES val:22 [ 46.931455] BUG: Bad rss-counter state mm:000000004e49b9df type:MM_FILEPAGES val:33 [ 46.932650] BUG: Bad rss-counter state mm:000000004e49b9df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10065' (ECDSA) to the list of known hosts. 2023/06/19 13:16:09 fuzzer started 2023/06/19 13:16:09 dialing manager at localhost:44161 2023/06/19 13:16:09 checking machine... 2023/06/19 13:16:09 checking revisions... [ 47.621579] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:16:09 testing simple program... [ 47.670692] cgroup: Unknown subsys name 'net' [ 47.715930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:15:54 Registers: info registers vcpu 0 RAX=ffffffff864bb033 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=000000000000000b RSI=0000000000000003 RDI=ffffffff8605469c RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864baff8 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130a72 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 00007fd7dc016900 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=00007fd7dc5cd618 CR3=000000000dfe8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffafcc0df30 CR3=000000000c5be000 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=2140a924763da9aea04ae2aa643af956 XMM02=ec2efd57dc4c00df000000000011d728 XMM03=84b76528cfe2ac8a000000000011d7f8 XMM04=715dfb375a9fe24100000000000ae988 XMM05=0c83c12848873d280000000000135268 XMM06=4fda316b135da52b0000000000134308 XMM07=e042d86d42eb936e0000000000124380 XMM08=84b76528cfe2ac8a000000000011d7f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000