syzkaller login: [ 31.026324] BUG: Bad rss-counter state mm:000000006a828a61 type:MM_FILEPAGES val:33 [ 31.027095] BUG: Bad rss-counter state mm:000000006a828a61 type:MM_ANONPAGES val:22 [ 31.141496] ================================================================== [ 31.142375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.143304] Read of size 8 at addr ffff88800dfe7798 by task sshd/220 [ 31.144080] [ 31.144297] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.145229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.146207] Call Trace: [ 31.146524] [ 31.146811] dump_stack_lvl+0x91/0xf0 [ 31.147303] print_report+0xcc/0x620 [ 31.147783] ? __virt_addr_valid+0x102/0x340 [ 31.148353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148965] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149577] kasan_report+0xbe/0xf0 [ 31.150047] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150660] vma_interval_tree_remove+0xc75/0xec0 [ 31.151257] vma_prepare+0xc54/0x11a0 [ 31.151725] __split_vma+0x5af/0x950 [ 31.152216] ? __pfx___split_vma+0x10/0x10 [ 31.152738] ? find_held_lock+0x2c/0x110 [ 31.153254] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.153810] ? lock_is_held_type+0x9f/0x120 [ 31.154346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.154941] ? mtree_range_walk+0x632/0x900 [ 31.155485] ? mas_walk+0x5c7/0x7c0 [ 31.155952] do_vmi_munmap+0x1f1/0x2b0 [ 31.156456] mmap_region+0x1f9/0x2660 [ 31.156928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.157432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.158131] ? __pfx_lock_acquire+0x10/0x10 [ 31.158653] ? __pfx_mmap_region+0x10/0x10 [ 31.159184] ? security_mmap_addr+0x7d/0xa0 [ 31.159709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.160262] do_mmap+0x854/0xf00 [ 31.160695] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.161182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.161732] ksys_mmap_pgoff+0x3af/0x500 [ 31.162228] do_syscall_64+0x3f/0x90 [ 31.162701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163340] RIP: 0033:0x7fde31494d82 [ 31.163791] 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 [ 31.165896] RSP: 002b:00007fffb8c344b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde31494d82 [ 31.167618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde308ce000 [ 31.168459] RBP: 00007fde308ce000 R08: 0000000000000009 R09: 0000000000001000 [ 31.169295] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556dc3305ec0 [ 31.170135] R13: 00007fffb8c344d0 R14: 00007fffb8c34500 R15: 00007fffb8c34860 [ 31.170986] [ 31.171274] [ 31.171484] Allocated by task 213: [ 31.171912] kasan_save_stack+0x22/0x50 [ 31.172429] kasan_set_track+0x25/0x30 [ 31.172913] __kasan_slab_alloc+0x59/0x70 [ 31.173428] kmem_cache_alloc+0x16b/0x370 [ 31.173942] vm_area_dup+0x20/0x160 [ 31.174393] __split_vma+0x170/0x950 [ 31.174856] split_vma+0xc6/0x110 [ 31.175290] mprotect_fixup+0x8d2/0xb30 [ 31.175791] do_mprotect_pkey+0x87e/0xd40 [ 31.176324] __x64_sys_mprotect+0x78/0xc0 [ 31.176849] do_syscall_64+0x3f/0x90 [ 31.177326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177979] [ 31.178206] Freed by task 213: [ 31.178609] kasan_save_stack+0x22/0x50 [ 31.179120] kasan_set_track+0x25/0x30 [ 31.179627] kasan_save_free_info+0x2b/0x50 [ 31.180174] __kasan_slab_free+0x10a/0x190 [ 31.180730] kmem_cache_free+0x10d/0x4d0 [ 31.181262] rcu_core+0x8c8/0x2860 [ 31.181709] __do_softirq+0x1b7/0x7d4 [ 31.182198] [ 31.182423] Last potentially related work creation: [ 31.183014] kasan_save_stack+0x22/0x50 [ 31.183519] __kasan_record_aux_stack+0x8e/0xa0 [ 31.184108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.184755] remove_vma+0x139/0x170 [ 31.185213] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.185771] do_vmi_munmap+0x1f1/0x2b0 [ 31.186258] __vm_munmap+0x138/0x3a0 [ 31.186727] __x64_sys_munmap+0x59/0x80 [ 31.187226] do_syscall_64+0x3f/0x90 [ 31.187702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188356] [ 31.188573] The buggy address belongs to the object at ffff88800dfe7740 [ 31.188573] which belongs to the cache vm_area_struct of size 168 [ 31.190038] The buggy address is located 88 bytes inside of [ 31.190038] freed 168-byte region [ffff88800dfe7740, ffff88800dfe77e8) [ 31.191437] [ 31.191655] The buggy address belongs to the physical page: [ 31.192336] page:000000004a9e9e2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe7 [ 31.193417] memcg:ffff88800f5a9201 [ 31.193849] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194493] page_type: 0xffffffff() [ 31.194944] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.195858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5a9201 [ 31.196782] page dumped because: kasan: bad access detected [ 31.197452] [ 31.197669] Memory state around the buggy address: [ 31.198254] ffff88800dfe7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.199121] ffff88800dfe7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.200000] >ffff88800dfe7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.200880] ^ [ 31.201380] ffff88800dfe7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.202259] ffff88800dfe7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.203125] ================================================================== [ 31.204137] Disabling lock debugging due to kernel taint [ 32.768555] BUG: Bad rss-counter state mm:000000007cc7cc7c type:MM_FILEPAGES val:33 [ 32.769294] BUG: Bad rss-counter state mm:000000007cc7cc7c type:MM_ANONPAGES val:22 [ 33.192836] BUG: Bad rss-counter state mm:0000000066fcb2d7 type:MM_FILEPAGES val:33 [ 33.194020] BUG: Bad rss-counter state mm:0000000066fcb2d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42286' (ECDSA) to the list of known hosts. 2023/06/20 19:48:30 fuzzer started 2023/06/20 19:48:30 dialing manager at localhost:36067 2023/06/20 19:48:30 checking machine... 2023/06/20 19:48:30 checking revisions... [ 33.887001] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:48:30 testing simple program... [ 33.940333] cgroup: Unknown subsys name 'net' [ 33.988629] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:48:29 Registers: info registers vcpu 0 RAX=ffffffff81f17190 RBX=ffffffff852c95b8 RCX=0000000000000000 RDX=ffff88800fb71b40 RSI=0000000000000081 RDI=ffff88800b5982b0 RBP=ffff88800b5982b0 RSP=ffff888016c1f8e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000081 R15=ffff88800b5982b2 RIP=ffffffff81f171ab 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 00007fbf12d3e900 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=00007fbf132f3650 CR3=0000000008ec6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88801439ff10 RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000022457 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880143d1b40 R15=ffff888016ed2678 RIP=ffffffff8113038e 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 00007f37107af900 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=00007f370fc08380 CR3=000000000d7b6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=88ea390a5c3ba40700000000000ae988 XMM05=1649a8b0413e90390000000000132a08 XMM06=4fda316b135da52b00000000001317f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000