syzkaller login: [ 34.081776] BUG: Bad rss-counter state mm:00000000b6cd2064 type:MM_FILEPAGES val:33 [ 34.083222] BUG: Bad rss-counter state mm:00000000b6cd2064 type:MM_ANONPAGES val:22 [ 34.253107] ================================================================== [ 34.254045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.254974] Read of size 8 at addr ffff88800f51a310 by task sshd/220 [ 34.255877] [ 34.256094] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.256958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.257946] Call Trace: [ 34.258265] [ 34.258549] dump_stack_lvl+0x91/0xf0 [ 34.259039] print_report+0xcc/0x620 [ 34.259554] ? __virt_addr_valid+0x102/0x340 [ 34.260104] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.260715] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.261331] kasan_report+0xbe/0xf0 [ 34.261802] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.262420] vma_interval_tree_remove+0xc75/0xec0 [ 34.263027] vma_prepare+0xc54/0x11a0 [ 34.263516] __split_vma+0x5af/0x950 [ 34.263990] ? __pfx___split_vma+0x10/0x10 [ 34.264522] ? find_held_lock+0x2c/0x110 [ 34.265040] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.265611] ? lock_is_held_type+0x9f/0x120 [ 34.266147] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.266762] ? mtree_range_walk+0x632/0x900 [ 34.267327] ? mas_walk+0x5c7/0x7c0 [ 34.267809] do_vmi_munmap+0x1f1/0x2b0 [ 34.268304] mmap_region+0x1f9/0x2660 [ 34.268794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.269311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.270034] ? __pfx_lock_acquire+0x10/0x10 [ 34.270573] ? __pfx_mmap_region+0x10/0x10 [ 34.271115] ? security_mmap_addr+0x7d/0xa0 [ 34.271647] ? get_unmapped_area+0x1f5/0x3f0 [ 34.272219] do_mmap+0x854/0xf00 [ 34.272658] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.273155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.273716] ksys_mmap_pgoff+0x3af/0x500 [ 34.274220] do_syscall_64+0x3f/0x90 [ 34.274698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.275351] RIP: 0033:0x7f25696f2d82 [ 34.275808] 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 [ 34.277944] RSP: 002b:00007ffe11db7368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.278850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25696f2d82 [ 34.279707] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2568b2c000 [ 34.280557] RBP: 00007f2568b2c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.281417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffcb013ec0 [ 34.282268] R13: 00007ffe11db7380 R14: 00007ffe11db73b0 R15: 00007ffe11db7710 [ 34.283146] [ 34.283443] [ 34.283657] Allocated by task 213: [ 34.284085] kasan_save_stack+0x22/0x50 [ 34.284588] kasan_set_track+0x25/0x30 [ 34.285083] __kasan_slab_alloc+0x59/0x70 [ 34.285613] kmem_cache_alloc+0x16b/0x370 [ 34.286125] vm_area_dup+0x20/0x160 [ 34.286587] __split_vma+0x170/0x950 [ 34.287058] split_vma+0xc6/0x110 [ 34.287512] mprotect_fixup+0x8d2/0xb30 [ 34.288011] do_mprotect_pkey+0x87e/0xd40 [ 34.288531] __x64_sys_mprotect+0x78/0xc0 [ 34.289047] do_syscall_64+0x3f/0x90 [ 34.289533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.290179] [ 34.290398] Freed by task 203: [ 34.290787] kasan_save_stack+0x22/0x50 [ 34.291320] kasan_set_track+0x25/0x30 [ 34.291809] kasan_save_free_info+0x2b/0x50 [ 34.292339] __kasan_slab_free+0x10a/0x190 [ 34.292867] kmem_cache_free+0x10d/0x4d0 [ 34.293371] rcu_core+0x8c8/0x2860 [ 34.293815] __do_softirq+0x1b7/0x7d4 [ 34.294292] [ 34.294506] Last potentially related work creation: [ 34.295099] kasan_save_stack+0x22/0x50 [ 34.295608] __kasan_record_aux_stack+0x8e/0xa0 [ 34.296176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.296820] remove_vma+0x139/0x170 [ 34.297280] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.297842] do_vmi_munmap+0x1f1/0x2b0 [ 34.298345] __vm_munmap+0x138/0x3a0 [ 34.298809] __x64_sys_munmap+0x59/0x80 [ 34.299324] do_syscall_64+0x3f/0x90 [ 34.299796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.300440] [ 34.300655] The buggy address belongs to the object at ffff88800f51a2b8 [ 34.300655] which belongs to the cache vm_area_struct of size 168 [ 34.302125] The buggy address is located 88 bytes inside of [ 34.302125] freed 168-byte region [ffff88800f51a2b8, ffff88800f51a360) [ 34.303553] [ 34.303768] The buggy address belongs to the physical page: [ 34.304420] page:00000000752365e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf51a [ 34.305507] memcg:ffff88800edf7c01 [ 34.305936] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.306584] page_type: 0xffffffff() [ 34.307035] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.307970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf7c01 [ 34.308875] page dumped because: kasan: bad access detected [ 34.309529] [ 34.309749] Memory state around the buggy address: [ 34.310335] ffff88800f51a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.311202] ffff88800f51a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.312063] >ffff88800f51a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.312920] ^ [ 34.313389] ffff88800f51a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.314240] ffff88800f51a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.315106] ================================================================== [ 34.316337] Disabling lock debugging due to kernel taint [ 36.120933] BUG: Bad rss-counter state mm:00000000914e9a79 type:MM_FILEPAGES val:33 [ 36.121701] BUG: Bad rss-counter state mm:00000000914e9a79 type:MM_ANONPAGES val:22 [ 36.568959] BUG: Bad rss-counter state mm:00000000bf46ca02 type:MM_FILEPAGES val:33 [ 36.569834] BUG: Bad rss-counter state mm:00000000bf46ca02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27620' (ECDSA) to the list of known hosts. 2023/06/20 06:12:56 fuzzer started 2023/06/20 06:12:56 dialing manager at localhost:44161 2023/06/20 06:12:56 checking machine... 2023/06/20 06:12:56 checking revisions... [ 37.270025] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:12:56 testing simple program... [ 37.331231] cgroup: Unknown subsys name 'net' [ 37.375898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000005d RCX=ffffffff8372651a RDX=ffff8880181851c0 RSI=0000000000000000 RDI=0000000000000004 RBP=000000000000005e RSP=ffff88800c65f7b8 R8 =0000000000000004 R9 =000000000000000a R10=000000000000005d R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96dc8 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f7a416a2900 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=00007f7a41c59618 CR3=000000000f842000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2638ecb5f0 CR3=000000000d858000 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=5db3b0137f4b5c86854d73fa99a22936 XMM02=000000000011e910ec2efd57dc4c00df XMM03=00000000001252e82e9f527bc1a4e378 XMM04=2387c77b89b4c03f00000000000ae988 XMM05=e16a76f4c48ae80600000000001356c8 XMM06=4fda316b135da52b0000000000134d60 XMM07=e042d86d42eb936e0000000000125568 XMM08=2e9f527bc1a4e378000000000011e970 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000