syzkaller login: [ 30.624642] BUG: Bad rss-counter state mm:0000000071520c85 type:MM_FILEPAGES val:33 [ 30.625896] BUG: Bad rss-counter state mm:0000000071520c85 type:MM_ANONPAGES val:22 [ 30.720493] ================================================================== [ 30.721433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.722371] Read of size 8 at addr ffff88800ff2a880 by task sshd/219 [ 30.723151] [ 30.723369] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.724348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.725353] Call Trace: [ 30.725674] [ 30.725967] dump_stack_lvl+0x91/0xf0 [ 30.726459] print_report+0xcc/0x620 [ 30.726961] ? __virt_addr_valid+0x102/0x340 [ 30.727511] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728135] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728786] kasan_report+0xbe/0xf0 [ 30.729275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729907] vma_interval_tree_remove+0xc75/0xec0 [ 30.730520] vma_prepare+0xc54/0x11a0 [ 30.731000] __split_vma+0x5af/0x950 [ 30.731470] ? __pfx___split_vma+0x10/0x10 [ 30.732009] ? find_held_lock+0x2c/0x110 [ 30.732547] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.733117] ? lock_is_held_type+0x9f/0x120 [ 30.733671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734279] ? mtree_range_walk+0x632/0x900 [ 30.734832] ? mas_walk+0x5c7/0x7c0 [ 30.735310] do_vmi_munmap+0x1f1/0x2b0 [ 30.735803] mmap_region+0x1f9/0x2660 [ 30.736298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.737520] ? __pfx_lock_acquire+0x10/0x10 [ 30.738055] ? __pfx_mmap_region+0x10/0x10 [ 30.738587] ? security_mmap_addr+0x7d/0xa0 [ 30.739134] ? get_unmapped_area+0x1f5/0x3f0 [ 30.739689] do_mmap+0x854/0xf00 [ 30.740139] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.740655] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741222] ksys_mmap_pgoff+0x3af/0x500 [ 30.741736] do_syscall_64+0x3f/0x90 [ 30.742224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742872] RIP: 0033:0x7fa50ae26d82 [ 30.743341] 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 [ 30.745486] RSP: 002b:00007fff7c9c78e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.746392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa50ae26d82 [ 30.747273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa50a260000 [ 30.748143] RBP: 00007fa50a260000 R08: 0000000000000009 R09: 0000000000001000 [ 30.749050] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9b7910ec0 [ 30.749897] R13: 00007fff7c9c7900 R14: 00007fff7c9c7930 R15: 00007fff7c9c7c90 [ 30.750767] [ 30.751067] [ 30.751284] Allocated by task 212: [ 30.751727] kasan_save_stack+0x22/0x50 [ 30.752237] kasan_set_track+0x25/0x30 [ 30.752752] __kasan_slab_alloc+0x59/0x70 [ 30.753291] kmem_cache_alloc+0x16b/0x370 [ 30.753809] vm_area_dup+0x20/0x160 [ 30.754272] __split_vma+0x170/0x950 [ 30.754748] split_vma+0xc6/0x110 [ 30.755189] mprotect_fixup+0x8d2/0xb30 [ 30.755699] do_mprotect_pkey+0x87e/0xd40 [ 30.756229] __x64_sys_mprotect+0x78/0xc0 [ 30.756777] do_syscall_64+0x3f/0x90 [ 30.757268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757928] [ 30.758148] Freed by task 212: [ 30.758554] kasan_save_stack+0x22/0x50 [ 30.759084] kasan_set_track+0x25/0x30 [ 30.759593] kasan_save_free_info+0x2b/0x50 [ 30.760143] __kasan_slab_free+0x10a/0x190 [ 30.760706] kmem_cache_free+0x10d/0x4d0 [ 30.761231] rcu_core+0x8c8/0x2860 [ 30.761687] __do_softirq+0x1b7/0x7d4 [ 30.762182] [ 30.762399] Last potentially related work creation: [ 30.762997] kasan_save_stack+0x22/0x50 [ 30.763511] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.764758] remove_vma+0x139/0x170 [ 30.765221] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.765793] do_vmi_munmap+0x1f1/0x2b0 [ 30.766286] __vm_munmap+0x138/0x3a0 [ 30.766768] __x64_sys_munmap+0x59/0x80 [ 30.767268] do_syscall_64+0x3f/0x90 [ 30.767753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768431] [ 30.768656] The buggy address belongs to the object at ffff88800ff2a828 [ 30.768656] which belongs to the cache vm_area_struct of size 168 [ 30.770234] The buggy address is located 88 bytes inside of [ 30.770234] freed 168-byte region [ffff88800ff2a828, ffff88800ff2a8d0) [ 30.771691] [ 30.771914] The buggy address belongs to the physical page: [ 30.772610] page:000000007488583c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff2a [ 30.773713] memcg:ffff88800cbbde01 [ 30.774152] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.774818] page_type: 0xffffffff() [ 30.775276] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.776217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbbde01 [ 30.777152] page dumped because: kasan: bad access detected [ 30.777831] [ 30.778061] Memory state around the buggy address: [ 30.778655] ffff88800ff2a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.779527] ffff88800ff2a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.780423] >ffff88800ff2a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.781306] ^ [ 30.781726] ffff88800ff2a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.782610] ffff88800ff2a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.783495] ================================================================== [ 30.784636] Disabling lock debugging due to kernel taint [ 32.596305] BUG: Bad rss-counter state mm:0000000018e0b1cd type:MM_FILEPAGES val:33 [ 32.597395] BUG: Bad rss-counter state mm:0000000018e0b1cd type:MM_ANONPAGES val:22 [ 33.043046] BUG: Bad rss-counter state mm:0000000034569a53 type:MM_FILEPAGES val:33 [ 33.044393] BUG: Bad rss-counter state mm:0000000034569a53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46173' (ECDSA) to the list of known hosts. 2023/06/20 11:01:52 fuzzer started 2023/06/20 11:01:52 dialing manager at localhost:36067 2023/06/20 11:01:52 checking machine... 2023/06/20 11:01:52 checking revisions... [ 33.694841] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:52 testing simple program... [ 33.755937] cgroup: Unknown subsys name 'net' [ 33.810275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:52 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=00007f74b613a018 CR3=000000000c6e2000 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=7d4113561e209fa01c4d3209d2a7c228 XMM02=000000000011d628ec2efd57dc4c00df XMM03=0000000000121cf0a8f88a510e2d5004 XMM04=9c28d0238eb5c0ca00000000000ae988 XMM05=7fce5d22a0714e950000000000132040 XMM06=806171799158d9670000000000131a38 XMM07=e042d86d42eb936e0000000000121f70 XMM08=a8f88a510e2d5004000000000011d688 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=1ffff1100d9e1353 RSI=ffff888016fdfb28 RDI=ffff88806cf09a98 RBP=ffff888016fdfb28 RSP=ffff88806cf099f8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a835 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff888016fdfb28 R15=ffff88806cf09a98 RIP=ffffffff8113040f RFL=00000216 [----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 00007f9ebe840700 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=00007f5701884618 CR3=000000000ec76000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032353a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000