syzkaller login: [ 31.471317] BUG: Bad rss-counter state mm:00000000d74a48fe type:MM_FILEPAGES val:33 [ 31.472602] BUG: Bad rss-counter state mm:00000000d74a48fe type:MM_ANONPAGES val:22 [ 31.623546] ================================================================== [ 31.624581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.625639] Read of size 8 at addr ffff88801a336968 by task sshd/220 [ 31.626684] [ 31.626930] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.627917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.629018] Call Trace: [ 31.629370] [ 31.629684] dump_stack_lvl+0x91/0xf0 [ 31.630243] print_report+0xcc/0x620 [ 31.630784] ? __virt_addr_valid+0x102/0x340 [ 31.631420] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632087] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632710] kasan_report+0xbe/0xf0 [ 31.633187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633812] vma_interval_tree_remove+0xc75/0xec0 [ 31.634418] vma_prepare+0xc54/0x11a0 [ 31.634895] __split_vma+0x5af/0x950 [ 31.635375] ? __pfx___split_vma+0x10/0x10 [ 31.635909] ? find_held_lock+0x2c/0x110 [ 31.636520] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.637183] ? lock_is_held_type+0x9f/0x120 [ 31.637813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.638518] ? mtree_range_walk+0x632/0x900 [ 31.639158] ? mas_walk+0x5c7/0x7c0 [ 31.639731] do_vmi_munmap+0x1f1/0x2b0 [ 31.640303] mmap_region+0x1f9/0x2660 [ 31.640860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.641458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.642291] ? __pfx_lock_acquire+0x10/0x10 [ 31.642904] ? __pfx_mmap_region+0x10/0x10 [ 31.643537] ? security_mmap_addr+0x7d/0xa0 [ 31.644120] ? get_unmapped_area+0x1f5/0x3f0 [ 31.644678] do_mmap+0x854/0xf00 [ 31.645121] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.645617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.646178] ksys_mmap_pgoff+0x3af/0x500 [ 31.646683] do_syscall_64+0x3f/0x90 [ 31.647165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647834] RIP: 0033:0x7efe8d24dd82 [ 31.648296] 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 [ 31.650408] RSP: 002b:00007ffce05bd9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.651309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe8d24dd82 [ 31.652160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe8c687000 [ 31.653002] RBP: 00007efe8c687000 R08: 0000000000000009 R09: 0000000000001000 [ 31.653841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a67e916ec0 [ 31.654688] R13: 00007ffce05bda10 R14: 00007ffce05bda40 R15: 00007ffce05bdda0 [ 31.655566] [ 31.655861] [ 31.656079] Allocated by task 213: [ 31.656509] kasan_save_stack+0x22/0x50 [ 31.657016] kasan_set_track+0x25/0x30 [ 31.657509] __kasan_slab_alloc+0x59/0x70 [ 31.658039] kmem_cache_alloc+0x16b/0x370 [ 31.658557] vm_area_dup+0x20/0x160 [ 31.659013] __split_vma+0x170/0x950 [ 31.659485] split_vma+0xc6/0x110 [ 31.659927] mprotect_fixup+0x8d2/0xb30 [ 31.660428] do_mprotect_pkey+0x87e/0xd40 [ 31.660951] __x64_sys_mprotect+0x78/0xc0 [ 31.661471] do_syscall_64+0x3f/0x90 [ 31.661953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662602] [ 31.662817] Freed by task 203: [ 31.663214] kasan_save_stack+0x22/0x50 [ 31.663731] kasan_set_track+0x25/0x30 [ 31.664228] kasan_save_free_info+0x2b/0x50 [ 31.664757] __kasan_slab_free+0x10a/0x190 [ 31.665299] kmem_cache_free+0x10d/0x4d0 [ 31.665812] rcu_core+0x8c8/0x2860 [ 31.666260] __do_softirq+0x1b7/0x7d4 [ 31.666736] [ 31.666950] Last potentially related work creation: [ 31.667647] kasan_save_stack+0x22/0x50 [ 31.668158] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.669371] remove_vma+0x139/0x170 [ 31.669827] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.670393] do_vmi_munmap+0x1f1/0x2b0 [ 31.670883] __vm_munmap+0x138/0x3a0 [ 31.671362] __x64_sys_munmap+0x59/0x80 [ 31.671859] do_syscall_64+0x3f/0x90 [ 31.672348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.673000] [ 31.673218] The buggy address belongs to the object at ffff88801a336910 [ 31.673218] which belongs to the cache vm_area_struct of size 168 [ 31.674705] The buggy address is located 88 bytes inside of [ 31.674705] freed 168-byte region [ffff88801a336910, ffff88801a3369b8) [ 31.676145] [ 31.676371] The buggy address belongs to the physical page: [ 31.677042] page:00000000fbe1877a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a336 [ 31.678171] memcg:ffff888019e92901 [ 31.678598] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.679263] page_type: 0xffffffff() [ 31.679730] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.680685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e92901 [ 31.681614] page dumped because: kasan: bad access detected [ 31.682288] [ 31.682504] Memory state around the buggy address: [ 31.683097] ffff88801a336800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.684010] ffff88801a336880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.684904] >ffff88801a336900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.685797] ^ [ 31.686617] ffff88801a336980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.687527] ffff88801a336a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.688412] ================================================================== [ 31.689371] Disabling lock debugging due to kernel taint [ 33.871276] BUG: Bad rss-counter state mm:000000002c51c7ba type:MM_FILEPAGES val:33 [ 33.872290] BUG: Bad rss-counter state mm:000000002c51c7ba type:MM_ANONPAGES val:22 [ 34.292240] BUG: Bad rss-counter state mm:0000000086befda4 type:MM_FILEPAGES val:33 [ 34.292981] BUG: Bad rss-counter state mm:0000000086befda4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43447' (ECDSA) to the list of known hosts. 2023/06/19 19:44:59 fuzzer started 2023/06/19 19:44:59 dialing manager at localhost:44161 2023/06/19 19:44:59 checking machine... 2023/06/19 19:44:59 checking revisions... [ 34.925092] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:44:59 testing simple program... [ 34.958540] cgroup: Unknown subsys name 'net' [ 35.000326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:44:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888014680000 RSI=ffffffff818de8c1 RDI=ffff8880162a0148 RBP=ffff8880162a00c0 RSP=ffff88801c95fc58 R8 =0000000000000003 R9 =0000000000002000 R10=000000000000c000 R11=00000000000b6996 R12=ffff8880162a0198 R13=ffff8880162a0148 R14=ffff8880162a0250 R15=ffff8880162a0198 RIP=ffffffff8452fb65 RFL=00000293 [--S-A-C] 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 00007f616926c900 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=00007f6169823618 CR3=00000000094c0000 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=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 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=00007fb08533d290 CR3=000000000d63a000 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=6b65381bf21f9ba3a84dc0607e159f69 XMM02=000000000011cea8eff9b2d0a8fce9cb XMM03=000000000011cf782c67c8bc2e329bc3 XMM04=dc36ad409531237400000000000ae988 XMM05=19e9129bd510f2350000000000133f60 XMM06=dcf6c5ef600ef9bc0000000000132dc8 XMM07=e042d86d42eb936e0000000000124670 XMM08=0c32545b5118300b000000000011cf78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000