syzkaller login: [ 75.588558] sshd (218) used greatest stack depth: 24128 bytes left [ 75.589613] BUG: Bad rss-counter state mm:000000006a289f9f type:MM_FILEPAGES val:33 [ 75.590166] BUG: Bad rss-counter state mm:000000006a289f9f type:MM_ANONPAGES val:22 [ 75.708134] ================================================================== [ 75.708840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.709551] Read of size 8 at addr ffff88800dddf140 by task sshd/227 [ 75.710163] [ 75.710330] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 75.711003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.711804] Call Trace: [ 75.712053] [ 75.712273] dump_stack_lvl+0x91/0xf0 [ 75.712720] print_report+0xcc/0x620 [ 75.713097] ? __virt_addr_valid+0x102/0x340 [ 75.713526] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.713998] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.714500] kasan_report+0xbe/0xf0 [ 75.714860] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.715344] vma_interval_tree_remove+0xc75/0xec0 [ 75.715811] vma_prepare+0xc54/0x11a0 [ 75.716183] __split_vma+0x5af/0x950 [ 75.716548] ? __pfx___split_vma+0x10/0x10 [ 75.716954] ? find_held_lock+0x2c/0x110 [ 75.717356] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.717786] ? lock_is_held_type+0x9f/0x120 [ 75.718233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.718727] ? mtree_range_walk+0x632/0x900 [ 75.719121] ? mas_walk+0x5c7/0x7c0 [ 75.719381] do_vmi_munmap+0x1f1/0x2b0 [ 75.719667] mmap_region+0x1f9/0x2660 [ 75.719954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.720259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.720696] ? __pfx_lock_acquire+0x10/0x10 [ 75.721016] ? __pfx_mmap_region+0x10/0x10 [ 75.721325] ? security_mmap_addr+0x7d/0xa0 [ 75.721645] ? get_unmapped_area+0x1f5/0x3f0 [ 75.721972] do_mmap+0x854/0xf00 [ 75.722243] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.722544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.722879] ksys_mmap_pgoff+0x3af/0x500 [ 75.723179] do_syscall_64+0x3f/0x90 [ 75.723461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.723852] RIP: 0033:0x7fa5c8b90d82 [ 75.724126] 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 [ 75.725374] RSP: 002b:00007ffc4b335cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.725914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5c8b90d82 [ 75.726433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5c7fca000 [ 75.726938] RBP: 00007fa5c7fca000 R08: 0000000000000009 R09: 0000000000001000 [ 75.727456] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561444ee6f70 [ 75.727951] R13: 00007ffc4b335d10 R14: 00007ffc4b335d40 R15: 00007ffc4b3360a0 [ 75.728456] [ 75.728621] [ 75.728746] Allocated by task 218: [ 75.729004] kasan_save_stack+0x22/0x50 [ 75.729295] kasan_set_track+0x25/0x30 [ 75.729587] __kasan_slab_alloc+0x59/0x70 [ 75.729894] kmem_cache_alloc+0x16b/0x370 [ 75.730219] vm_area_dup+0x20/0x160 [ 75.730485] __split_vma+0x170/0x950 [ 75.730760] split_vma+0xc6/0x110 [ 75.731019] mprotect_fixup+0x8d2/0xb30 [ 75.731312] do_mprotect_pkey+0x87e/0xd40 [ 75.731621] __x64_sys_mprotect+0x78/0xc0 [ 75.731928] do_syscall_64+0x3f/0x90 [ 75.732206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.732581] [ 75.732706] Freed by task 218: [ 75.732942] kasan_save_stack+0x22/0x50 [ 75.733236] kasan_set_track+0x25/0x30 [ 75.733518] kasan_save_free_info+0x2b/0x50 [ 75.733826] __kasan_slab_free+0x10a/0x190 [ 75.734130] kmem_cache_free+0x10d/0x4d0 [ 75.734430] rcu_core+0x8c8/0x2860 [ 75.734684] __do_softirq+0x1b7/0x7d4 [ 75.734959] [ 75.735088] Last potentially related work creation: [ 75.735452] kasan_save_stack+0x22/0x50 [ 75.735742] __kasan_record_aux_stack+0x8e/0xa0 [ 75.736089] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.736468] remove_vma+0x139/0x170 [ 75.736735] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.737065] do_vmi_munmap+0x1f1/0x2b0 [ 75.737352] __vm_munmap+0x138/0x3a0 [ 75.737623] __x64_sys_munmap+0x59/0x80 [ 75.737910] do_syscall_64+0x3f/0x90 [ 75.738200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.738576] [ 75.738699] The buggy address belongs to the object at ffff88800dddf0e8 [ 75.738699] which belongs to the cache vm_area_struct of size 168 [ 75.739579] The buggy address is located 88 bytes inside of [ 75.739579] freed 168-byte region [ffff88800dddf0e8, ffff88800dddf190) [ 75.740417] [ 75.740550] The buggy address belongs to the physical page: [ 75.740954] page:00000000bb24eed7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdddf [ 75.741598] memcg:ffff88801627e301 [ 75.741849] flags: 0x100000000000200(slab|node=0|zone=1) [ 75.742233] page_type: 0xffffffff() [ 75.742502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 75.743040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801627e301 [ 75.743582] page dumped because: kasan: bad access detected [ 75.743974] [ 75.744097] Memory state around the buggy address: [ 75.744435] ffff88800dddf000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 75.744941] ffff88800dddf080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 75.745444] >ffff88800dddf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.745951] ^ [ 75.746334] ffff88800dddf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 75.746843] ffff88800dddf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 75.747342] ================================================================== [ 75.747930] Disabling lock debugging due to kernel taint [ 77.928404] BUG: Bad rss-counter state mm:000000007860df28 type:MM_FILEPAGES val:33 [ 77.929410] BUG: Bad rss-counter state mm:000000007860df28 type:MM_ANONPAGES val:22 [ 78.519227] BUG: Bad rss-counter state mm:0000000026c7e247 type:MM_FILEPAGES val:33 [ 78.520478] BUG: Bad rss-counter state mm:0000000026c7e247 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39194' (ECDSA) to the list of known hosts. 2023/06/20 01:00:23 fuzzer started 2023/06/20 01:00:23 dialing manager at localhost:44161 2023/06/20 01:00:23 checking machine... 2023/06/20 01:00:23 checking revisions... [ 79.189840] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:00:23 testing simple program... [ 79.230242] cgroup: Unknown subsys name 'net' [ 79.301293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:00:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b7324 RDX=0000000000000008 RSI=ffff88800d9e7998 RDI=ffff88800d9e7548 RBP=ffff88800d9e75a0 RSP=ffff88800d9e74b8 R8 =ffffffff863b7328 R9 =ffff88800d9e7588 R10=0000000000038001 R11=000000000008b7e4 R12=ffff88800d9e75a8 R13=ffff88800d9e7590 R14=ffff88800d9e79a0 R15=ffff88800d9e7548 RIP=ffffffff81130400 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 00007f984769f900 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=00007f9846b0ce40 CR3=00000000136be000 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=4d4c5e557acb97ae9a41c0a938e50d68 XMM02=eff9b2d0a8fce9cb000000000011d3b0 XMM03=2c67c8bc2e329bc3000000000011d4d8 XMM04=2d42e391a317fc3100000000000ae988 XMM05=a776f6528f127ed10000000000135a50 XMM06=e8008b1642ea3e600000000000134af0 XMM07=fb795ef6d65770560000000000124250 XMM08=2c67c8bc2e329bc3000000000011d4d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000246 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800b8751c0 RSI=0000000000000066 RDI=ffff88800ff5ff58 RBP=ffff88800ff5ff58 RSP=ffff88800ff5ff30 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=0000000000000000 R12=ffff88800ff5ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450c02f 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 00007f0cfcd7f900 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=00007ffc99fab000 CR3=000000000ebd0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000