syzkaller login: [ 30.781047] BUG: Bad rss-counter state mm:0000000094643068 type:MM_FILEPAGES val:33 [ 30.782230] BUG: Bad rss-counter state mm:0000000094643068 type:MM_ANONPAGES val:22 [ 30.818076] ================================================================== [ 30.819160] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.820242] Read of size 8 at addr ffff8880097e6310 by task sshd/219 [ 30.821069] [ 30.821428] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.822353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.823405] Call Trace: [ 30.823776] [ 30.824051] dump_stack_lvl+0x91/0xf0 [ 30.824552] print_report+0xcc/0x620 [ 30.825084] ? __virt_addr_valid+0x102/0x340 [ 30.825615] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826780] kasan_report+0xbe/0xf0 [ 30.827237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827839] vma_interval_tree_remove+0xc75/0xec0 [ 30.828411] vma_prepare+0xc54/0x11a0 [ 30.828863] __split_vma+0x5af/0x950 [ 30.829318] ? __pfx___split_vma+0x10/0x10 [ 30.829828] ? find_held_lock+0x2c/0x110 [ 30.830321] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.830861] ? lock_is_held_type+0x9f/0x120 [ 30.831378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.831958] ? mtree_range_walk+0x632/0x900 [ 30.832486] ? mas_walk+0x5c7/0x7c0 [ 30.832940] do_vmi_munmap+0x1f1/0x2b0 [ 30.833408] mmap_region+0x1f9/0x2660 [ 30.833882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.834371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.835048] ? __pfx_lock_acquire+0x10/0x10 [ 30.835581] ? __pfx_mmap_region+0x10/0x10 [ 30.836112] ? security_mmap_addr+0x7d/0xa0 [ 30.836642] ? get_unmapped_area+0x1f5/0x3f0 [ 30.837192] do_mmap+0x854/0xf00 [ 30.837633] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.838129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.838686] ksys_mmap_pgoff+0x3af/0x500 [ 30.839188] do_syscall_64+0x3f/0x90 [ 30.839670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840315] RIP: 0033:0x7f62f9a0cd82 [ 30.840774] 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 [ 30.842881] RSP: 002b:00007ffe6d7e9ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.843817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62f9a0cd82 [ 30.844674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62f8e46000 [ 30.845535] RBP: 00007f62f8e46000 R08: 0000000000000009 R09: 0000000000001000 [ 30.846389] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a453b3ec0 [ 30.847249] R13: 00007ffe6d7e9ef0 R14: 00007ffe6d7e9f20 R15: 00007ffe6d7ea280 [ 30.848124] [ 30.848423] [ 30.848643] Allocated by task 212: [ 30.849080] kasan_save_stack+0x22/0x50 [ 30.849583] kasan_set_track+0x25/0x30 [ 30.850071] __kasan_slab_alloc+0x59/0x70 [ 30.850599] kmem_cache_alloc+0x16b/0x370 [ 30.851117] vm_area_dup+0x20/0x160 [ 30.851571] __split_vma+0x170/0x950 [ 30.852040] split_vma+0xc6/0x110 [ 30.852481] mprotect_fixup+0x8d2/0xb30 [ 30.852976] do_mprotect_pkey+0x87e/0xd40 [ 30.853493] __x64_sys_mprotect+0x78/0xc0 [ 30.854020] do_syscall_64+0x3f/0x90 [ 30.854491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855138] [ 30.855372] Freed by task 212: [ 30.855767] kasan_save_stack+0x22/0x50 [ 30.856276] kasan_set_track+0x25/0x30 [ 30.856760] kasan_save_free_info+0x2b/0x50 [ 30.857283] __kasan_slab_free+0x10a/0x190 [ 30.857818] kmem_cache_free+0x10d/0x4d0 [ 30.858323] rcu_core+0x8c8/0x2860 [ 30.858838] __do_softirq+0x1b7/0x7d4 [ 30.859329] [ 30.859545] Last potentially related work creation: [ 30.860141] kasan_save_stack+0x22/0x50 [ 30.860642] __kasan_record_aux_stack+0x8e/0xa0 [ 30.861210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.861865] remove_vma+0x139/0x170 [ 30.862323] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.862881] do_vmi_munmap+0x1f1/0x2b0 [ 30.863364] __vm_munmap+0x138/0x3a0 [ 30.863835] __x64_sys_munmap+0x59/0x80 [ 30.864327] do_syscall_64+0x3f/0x90 [ 30.864801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865456] [ 30.865676] The buggy address belongs to the object at ffff8880097e62b8 [ 30.865676] which belongs to the cache vm_area_struct of size 168 [ 30.867165] The buggy address is located 88 bytes inside of [ 30.867165] freed 168-byte region [ffff8880097e62b8, ffff8880097e6360) [ 30.868597] [ 30.868813] The buggy address belongs to the physical page: [ 30.869486] page:00000000c8e621ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97e6 [ 30.870575] memcg:ffff888015f44601 [ 30.871004] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.871656] page_type: 0xffffffff() [ 30.872109] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.873022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f44601 [ 30.873946] page dumped because: kasan: bad access detected [ 30.874609] [ 30.874823] Memory state around the buggy address: [ 30.875418] ffff8880097e6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.876272] ffff8880097e6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.877137] >ffff8880097e6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.878003] ^ [ 30.878474] ffff8880097e6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.879339] ffff8880097e6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.880182] ================================================================== [ 30.881112] Disabling lock debugging due to kernel taint [ 32.914413] BUG: Bad rss-counter state mm:000000003d697289 type:MM_FILEPAGES val:33 [ 32.915591] BUG: Bad rss-counter state mm:000000003d697289 type:MM_ANONPAGES val:22 [ 33.329714] BUG: Bad rss-counter state mm:00000000acdc3a3d type:MM_FILEPAGES val:33 [ 33.330907] BUG: Bad rss-counter state mm:00000000acdc3a3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19049' (ECDSA) to the list of known hosts. 2023/06/20 22:09:45 fuzzer started 2023/06/20 22:09:46 dialing manager at localhost:36067 2023/06/20 22:09:46 checking machine... 2023/06/20 22:09:46 checking revisions... [ 34.102958] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:09:46 testing simple program... [ 34.148627] cgroup: Unknown subsys name 'net' [ 34.185158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:09:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83639d0c RDI=ffff88800f7a83f4 RBP=ffff88800f7a8000 RSP=ffff88801c627df0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800f7a8000 R13=0000000000000000 R14=ffff8880191af8c0 R15=0000000000000000 RIP=ffffffff81374525 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 00007f066d377900 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=00007f066d92e618 CR3=000000000d850000 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=0000000000000000 RBX=ffff88806cf2c240 RCX=ffffffff812d86ea RDX=1ffff1100d9e5856 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00000007b7d5d026 RSP=ffff88806cf09f78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=ffff88806cf2c2e0 R13=00000000000be733 R14=ffff88806cf2c2b0 R15=ffff88806cf2c2b8 RIP=ffffffff812ab5d4 RFL=00000006 [-----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 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=00007feba33e50b0 CR3=000000000caf6000 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=a62a86a20481ca92964d6e35060eb19b XMM02=0000000000119ee0ec2efd57dc4c00df XMM03=0000000000121750bd84d0837d920a07 XMM04=ba5ffbaf1163129500000000000ae988 XMM05=dfcdbad4f1609c3700000000001315b0 XMM06=eb220faf1cae529f0000000000130418 XMM07=e042d86d42eb936e00000000001219d0 XMM08=bd84d0837d920a070000000000119f40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000