syzkaller login: [ 28.682743] BUG: Bad rss-counter state mm:00000000163117e0 type:MM_FILEPAGES val:33 [ 28.684131] BUG: Bad rss-counter state mm:00000000163117e0 type:MM_ANONPAGES val:22 [ 28.838979] ================================================================== [ 28.839892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.840888] Read of size 8 at addr ffff888019f06968 by task sshd/221 [ 28.841683] [ 28.841908] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.842918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.843922] Call Trace: [ 28.844277] [ 28.844566] dump_stack_lvl+0x91/0xf0 [ 28.845075] print_report+0xcc/0x620 [ 28.845565] ? __virt_addr_valid+0x102/0x340 [ 28.846131] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.846760] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.847393] kasan_report+0xbe/0xf0 [ 28.847877] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.848540] vma_interval_tree_remove+0xc75/0xec0 [ 28.849150] vma_prepare+0xc54/0x11a0 [ 28.849629] __split_vma+0x5af/0x950 [ 28.850103] ? __pfx___split_vma+0x10/0x10 [ 28.850644] ? find_held_lock+0x2c/0x110 [ 28.851164] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.851736] ? lock_is_held_type+0x9f/0x120 [ 28.852291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.852904] ? mtree_range_walk+0x632/0x900 [ 28.853467] ? mas_walk+0x5c7/0x7c0 [ 28.853950] do_vmi_munmap+0x1f1/0x2b0 [ 28.854446] mmap_region+0x1f9/0x2660 [ 28.854938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.855455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.856186] ? __pfx_lock_acquire+0x10/0x10 [ 28.856742] ? __pfx_mmap_region+0x10/0x10 [ 28.857288] ? security_mmap_addr+0x7d/0xa0 [ 28.857862] ? get_unmapped_area+0x1f5/0x3f0 [ 28.858430] do_mmap+0x854/0xf00 [ 28.858890] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.859389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.859951] ksys_mmap_pgoff+0x3af/0x500 [ 28.860483] do_syscall_64+0x3f/0x90 [ 28.860967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.861630] RIP: 0033:0x7f59eaa6ad82 [ 28.862100] 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 [ 28.864347] RSP: 002b:00007ffe0da57f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.865266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59eaa6ad82 [ 28.866146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59e9ea4000 [ 28.867003] RBP: 00007f59e9ea4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.867871] R10: 0000000000000812 R11: 0000000000000206 R12: 000056111b56dec0 [ 28.868780] R13: 00007ffe0da57f80 R14: 00007ffe0da57fb0 R15: 00007ffe0da58310 [ 28.869661] [ 28.869964] [ 28.870189] Allocated by task 214: [ 28.870633] kasan_save_stack+0x22/0x50 [ 28.871154] kasan_set_track+0x25/0x30 [ 28.871684] __kasan_slab_alloc+0x59/0x70 [ 28.872229] kmem_cache_alloc+0x16b/0x370 [ 28.872754] vm_area_dup+0x20/0x160 [ 28.873226] __split_vma+0x170/0x950 [ 28.873701] split_vma+0xc6/0x110 [ 28.874152] mprotect_fixup+0x8d2/0xb30 [ 28.874677] do_mprotect_pkey+0x87e/0xd40 [ 28.875229] __x64_sys_mprotect+0x78/0xc0 [ 28.875771] do_syscall_64+0x3f/0x90 [ 28.876262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.876904] [ 28.877121] Freed by task 214: [ 28.877514] kasan_save_stack+0x22/0x50 [ 28.878017] kasan_set_track+0x25/0x30 [ 28.878527] kasan_save_free_info+0x2b/0x50 [ 28.879097] __kasan_slab_free+0x10a/0x190 [ 28.879664] kmem_cache_free+0x10d/0x4d0 [ 28.880214] rcu_core+0x8c8/0x2860 [ 28.880683] __do_softirq+0x1b7/0x7d4 [ 28.881175] [ 28.881396] Last potentially related work creation: [ 28.881984] kasan_save_stack+0x22/0x50 [ 28.882500] __kasan_record_aux_stack+0x8e/0xa0 [ 28.883102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.883830] remove_vma+0x139/0x170 [ 28.884334] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.884897] do_vmi_munmap+0x1f1/0x2b0 [ 28.885409] __vm_munmap+0x138/0x3a0 [ 28.885890] __x64_sys_munmap+0x59/0x80 [ 28.886399] do_syscall_64+0x3f/0x90 [ 28.886877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.887528] [ 28.887750] The buggy address belongs to the object at ffff888019f06910 [ 28.887750] which belongs to the cache vm_area_struct of size 168 [ 28.889305] The buggy address is located 88 bytes inside of [ 28.889305] freed 168-byte region [ffff888019f06910, ffff888019f069b8) [ 28.890727] [ 28.890940] The buggy address belongs to the physical page: [ 28.891623] page:000000002c81a41d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f06 [ 28.892763] memcg:ffff88800ca4f401 [ 28.893189] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.893849] page_type: 0xffffffff() [ 28.894308] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.895225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca4f401 [ 28.896149] page dumped because: kasan: bad access detected [ 28.896842] [ 28.897077] Memory state around the buggy address: [ 28.897711] ffff888019f06800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.898585] ffff888019f06880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.899432] >ffff888019f06900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.900312] ^ [ 28.901103] ffff888019f06980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.901976] ffff888019f06a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.902829] ================================================================== [ 28.903762] Disabling lock debugging due to kernel taint [ 30.916628] BUG: Bad rss-counter state mm:00000000a6fe342e type:MM_FILEPAGES val:33 [ 30.917813] BUG: Bad rss-counter state mm:00000000a6fe342e type:MM_ANONPAGES val:22 [ 31.400026] BUG: Bad rss-counter state mm:0000000021e65cb1 type:MM_FILEPAGES val:33 [ 31.401166] BUG: Bad rss-counter state mm:0000000021e65cb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28275' (ECDSA) to the list of known hosts. 2023/06/20 22:29:43 fuzzer started 2023/06/20 22:29:43 dialing manager at localhost:36067 2023/06/20 22:29:43 checking machine... 2023/06/20 22:29:43 checking revisions... [ 32.019188] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:29:43 testing simple program... [ 32.068800] cgroup: Unknown subsys name 'net' [ 32.121080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007faee3524680 CR3=000000000ca9e000 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=addad73d1d47dfb341464702e45eb079 XMM02=000000000011d2e8ec2efd57dc4c00df XMM03=00000000001219b0367cb3a6e881f4f1 XMM04=93840d73dfd68e0800000000000ae988 XMM05=e4cb8bb95a7664b60000000000131790 XMM06=fd7e11d49e03e61500000000001305f8 XMM07=e042d86d42eb936e0000000000121c30 XMM08=367cb3a6e881f4f1000000000011d348 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110039c3eb7 RSI=ffffffff83662309 RDI=ffff88801ce1f628 RBP=ffff88801ce1f5f8 RSP=ffff88801ce1f550 R8 =0000000000000001 R9 =ffff88801ce1f5a0 R10=0000000000038001 R11=0000000000020c57 R12=ffff88801ce1f628 R13=0000000000000000 R14=ffff88800fb09b40 R15=ffff88800e9b2390 RIP=ffffffff813ad47f 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 00007f1db3215900 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=00007ffc242b6000 CR3=000000000d754000 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