syzkaller login: [ 31.126629] BUG: Bad rss-counter state mm:00000000c95ce19f type:MM_FILEPAGES val:33 [ 31.127762] BUG: Bad rss-counter state mm:00000000c95ce19f type:MM_ANONPAGES val:22 [ 31.314305] ================================================================== [ 31.315450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.316739] Read of size 8 at addr ffff88800f190798 by task sshd/221 [ 31.317606] [ 31.317840] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.318838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.320049] Call Trace: [ 31.320526] [ 31.320935] dump_stack_lvl+0x91/0xf0 [ 31.321647] print_report+0xcc/0x620 [ 31.322352] ? __virt_addr_valid+0x102/0x340 [ 31.323143] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324031] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324781] kasan_report+0xbe/0xf0 [ 31.325316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.326002] vma_interval_tree_remove+0xc75/0xec0 [ 31.326653] vma_prepare+0xc54/0x11a0 [ 31.327182] __split_vma+0x5af/0x950 [ 31.327688] ? __pfx___split_vma+0x10/0x10 [ 31.328311] ? find_held_lock+0x2c/0x110 [ 31.328888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.329538] ? lock_is_held_type+0x9f/0x120 [ 31.330157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.330877] ? mtree_range_walk+0x632/0x900 [ 31.331559] ? mas_walk+0x5c7/0x7c0 [ 31.332140] do_vmi_munmap+0x1f1/0x2b0 [ 31.332755] mmap_region+0x1f9/0x2660 [ 31.333353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.333987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.334838] ? __pfx_lock_acquire+0x10/0x10 [ 31.335503] ? __pfx_mmap_region+0x10/0x10 [ 31.336193] ? security_mmap_addr+0x7d/0xa0 [ 31.336836] ? get_unmapped_area+0x1f5/0x3f0 [ 31.337508] do_mmap+0x854/0xf00 [ 31.338037] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.338636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.339308] ksys_mmap_pgoff+0x3af/0x500 [ 31.339928] do_syscall_64+0x3f/0x90 [ 31.340535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.341351] RIP: 0033:0x7f0a3076cd82 [ 31.341921] 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 [ 31.344594] RSP: 002b:00007ffc1bd9a858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.345695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a3076cd82 [ 31.346735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a2fba6000 [ 31.347792] RBP: 00007f0a2fba6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.348815] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea6020eec0 [ 31.349784] R13: 00007ffc1bd9a870 R14: 00007ffc1bd9a8a0 R15: 00007ffc1bd9ac00 [ 31.350760] [ 31.351105] [ 31.351355] Allocated by task 214: [ 31.351835] kasan_save_stack+0x22/0x50 [ 31.352448] kasan_set_track+0x25/0x30 [ 31.353022] __kasan_slab_alloc+0x59/0x70 [ 31.353589] kmem_cache_alloc+0x16b/0x370 [ 31.354154] vm_area_dup+0x20/0x160 [ 31.354646] __split_vma+0x170/0x950 [ 31.355155] split_vma+0xc6/0x110 [ 31.355634] mprotect_fixup+0x8d2/0xb30 [ 31.356211] do_mprotect_pkey+0x87e/0xd40 [ 31.356773] __x64_sys_mprotect+0x78/0xc0 [ 31.357355] do_syscall_64+0x3f/0x90 [ 31.357884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358617] [ 31.358853] Freed by task 214: [ 31.359307] kasan_save_stack+0x22/0x50 [ 31.359861] kasan_set_track+0x25/0x30 [ 31.360450] kasan_save_free_info+0x2b/0x50 [ 31.361055] __kasan_slab_free+0x10a/0x190 [ 31.361654] kmem_cache_free+0x10d/0x4d0 [ 31.362229] rcu_core+0x8c8/0x2860 [ 31.362721] __do_softirq+0x1b7/0x7d4 [ 31.363258] [ 31.363494] Last potentially related work creation: [ 31.364164] kasan_save_stack+0x22/0x50 [ 31.364744] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366113] remove_vma+0x139/0x170 [ 31.366615] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367247] do_vmi_munmap+0x1f1/0x2b0 [ 31.367790] __vm_munmap+0x138/0x3a0 [ 31.368357] __x64_sys_munmap+0x59/0x80 [ 31.368912] do_syscall_64+0x3f/0x90 [ 31.369456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370181] [ 31.370417] The buggy address belongs to the object at ffff88800f190740 [ 31.370417] which belongs to the cache vm_area_struct of size 168 [ 31.372082] The buggy address is located 88 bytes inside of [ 31.372082] freed 168-byte region [ffff88800f190740, ffff88800f1907e8) [ 31.373670] [ 31.373911] The buggy address belongs to the physical page: [ 31.374649] page:0000000098be4b20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf190 [ 31.375862] memcg:ffff88800ab68f01 [ 31.376369] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.377103] page_type: 0xffffffff() [ 31.377608] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.378644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ab68f01 [ 31.379661] page dumped because: kasan: bad access detected [ 31.380446] [ 31.380684] Memory state around the buggy address: [ 31.381339] ffff88800f190680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.382299] ffff88800f190700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.383260] >ffff88800f190780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.384250] ^ [ 31.384795] ffff88800f190800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.385757] ffff88800f190880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.386713] ================================================================== [ 31.388111] Disabling lock debugging due to kernel taint [ 33.096614] BUG: Bad rss-counter state mm:0000000088c2cf8f type:MM_FILEPAGES val:33 [ 33.097791] BUG: Bad rss-counter state mm:0000000088c2cf8f type:MM_ANONPAGES val:22 [ 33.547984] BUG: Bad rss-counter state mm:00000000d9829985 type:MM_FILEPAGES val:33 [ 33.548733] BUG: Bad rss-counter state mm:00000000d9829985 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4276' (ECDSA) to the list of known hosts. 2023/06/20 23:55:50 fuzzer started 2023/06/20 23:55:50 dialing manager at localhost:36067 2023/06/20 23:55:50 checking machine... 2023/06/20 23:55:50 checking revisions... [ 34.264181] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:55:50 testing simple program... [ 34.317488] cgroup: Unknown subsys name 'net' [ 34.355316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000677d80 RCX=0000000000000000 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff888015c17860 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea000023ad00 R14=ffffffff8367562f R15=ffff88800f1cfd80 RIP=ffffffff8180c61b RFL=00000282 [--S----] 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 00007f3ca0678900 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=00007f7054ecf650 CR3=000000000eb5c000 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=02d76b6aed1d9c9c6f4f74b4bebe2251 XMM02=000000000011a748d59e07bde36eea69 XMM03=000000000011a870ec2efd57dc4c00df XMM04=610396072f297a3800000000000ae988 XMM05=6aac9f18baa39dbd0000000000132c70 XMM06=c291bd5c70af25b90000000000131a60 XMM07=fb795ef6d65770560000000000121db0 XMM08=2c67c8bc2e329bc3000000000011a870 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000003d996ea0 RBX=ffff888014697890 RCX=0000000000000000 RDX=000000003d996ea0 RSI=ffff8880146976e8 RDI=ffff888008dfc000 RBP=ffff8880146976e8 RSP=ffff888014697468 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888008dfc000 R13=000000003d996ea0 R14=ffff88800ab0a008 R15=dffffc0000000000 RIP=ffffffff81f358f2 RFL=00000296 [--S-AP-] 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 00007ffb0e1e78c0 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=00007ffd4c8f73a8 CR3=000000000eef6000 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=000055fd692c0ce0000055fd692b9ee0 XMM01=0000000700000004000055fd692c0ce0 XMM02=000055fd692c0c600000000400000003 XMM03=000055fd692c0ce0000055fd692b9ee0 XMM04=0000000100000002000055fd692c0ce0 XMM05=000055fd692c0c80000055fd692c0c60 XMM06=000055fd6929ee70ffffffff00000004 XMM07=00000000000000000000000000000000 XMM08=20202020203a657a697320656c696600 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000