[ 24.069971] BUG: Bad rss-counter state mm:00000000ca5a5efc type:MM_FILEPAGES val:33 [ 24.071496] BUG: Bad rss-counter state mm:00000000ca5a5efc type:MM_ANONPAGES val:22 [ 24.231191] ================================================================== [ 24.232103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.233041] Read of size 8 at addr ffff88800efed968 by task sshd/219 [ 24.233826] [ 24.234127] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.235005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.235982] Call Trace: [ 24.236420] [ 24.236766] dump_stack_lvl+0x91/0xf0 [ 24.237372] print_report+0xcc/0x620 [ 24.237953] ? __virt_addr_valid+0x102/0x340 [ 24.238628] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.239385] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.240135] kasan_report+0xbe/0xf0 [ 24.240717] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.241483] vma_interval_tree_remove+0xc75/0xec0 [ 24.242222] vma_prepare+0xc54/0x11a0 [ 24.242804] __split_vma+0x5af/0x950 [ 24.243382] ? __pfx___split_vma+0x10/0x10 [ 24.244036] ? find_held_lock+0x2c/0x110 [ 24.244669] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.245384] ? lock_is_held_type+0x9f/0x120 [ 24.245994] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.246599] ? mtree_range_walk+0x632/0x900 [ 24.247146] ? mas_walk+0x5c7/0x7c0 [ 24.247617] do_vmi_munmap+0x1f1/0x2b0 [ 24.248109] mmap_region+0x1f9/0x2660 [ 24.248584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.249094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.249809] ? __pfx_lock_acquire+0x10/0x10 [ 24.250336] ? __pfx_mmap_region+0x10/0x10 [ 24.250857] ? security_mmap_addr+0x7d/0xa0 [ 24.251381] ? get_unmapped_area+0x1f5/0x3f0 [ 24.251929] do_mmap+0x854/0xf00 [ 24.252363] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.252855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.253427] ksys_mmap_pgoff+0x3af/0x500 [ 24.253941] do_syscall_64+0x3f/0x90 [ 24.254425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.255072] RIP: 0033:0x7f588f7ddd82 [ 24.255529] 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 [ 24.257651] RSP: 002b:00007ffc99637018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.258566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f588f7ddd82 [ 24.259407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f588ec17000 [ 24.260248] RBP: 00007f588ec17000 R08: 0000000000000009 R09: 0000000000001000 [ 24.261092] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d14e544ec0 [ 24.261946] R13: 00007ffc99637030 R14: 00007ffc99637060 R15: 00007ffc996373c0 [ 24.262797] [ 24.263087] [ 24.263302] Allocated by task 212: [ 24.263749] kasan_save_stack+0x22/0x50 [ 24.264261] kasan_set_track+0x25/0x30 [ 24.264750] __kasan_slab_alloc+0x59/0x70 [ 24.265273] kmem_cache_alloc+0x16b/0x370 [ 24.265786] vm_area_dup+0x20/0x160 [ 24.266236] __split_vma+0x170/0x950 [ 24.266700] split_vma+0xc6/0x110 [ 24.267137] mprotect_fixup+0x8d2/0xb30 [ 24.267634] do_mprotect_pkey+0x87e/0xd40 [ 24.268151] __x64_sys_mprotect+0x78/0xc0 [ 24.268665] do_syscall_64+0x3f/0x90 [ 24.269145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269809] [ 24.270031] Freed by task 13: [ 24.270413] kasan_save_stack+0x22/0x50 [ 24.270915] kasan_set_track+0x25/0x30 [ 24.271401] kasan_save_free_info+0x2b/0x50 [ 24.271936] __kasan_slab_free+0x10a/0x190 [ 24.272464] kmem_cache_free+0x10d/0x4d0 [ 24.272970] rcu_core+0x8c8/0x2860 [ 24.273417] __do_softirq+0x1b7/0x7d4 [ 24.273892] [ 24.274110] Last potentially related work creation: [ 24.274689] kasan_save_stack+0x22/0x50 [ 24.275185] __kasan_record_aux_stack+0x8e/0xa0 [ 24.275757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.276399] remove_vma+0x139/0x170 [ 24.276847] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.277409] do_vmi_munmap+0x1f1/0x2b0 [ 24.277889] __vm_munmap+0x138/0x3a0 [ 24.278354] __x64_sys_munmap+0x59/0x80 [ 24.278846] do_syscall_64+0x3f/0x90 [ 24.279320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.279962] [ 24.280176] The buggy address belongs to the object at ffff88800efed910 [ 24.280176] which belongs to the cache vm_area_struct of size 168 [ 24.281650] The buggy address is located 88 bytes inside of [ 24.281650] freed 168-byte region [ffff88800efed910, ffff88800efed9b8) [ 24.283055] [ 24.283274] The buggy address belongs to the physical page: [ 24.283932] page:0000000012923c37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefed [ 24.285001] memcg:ffff88800ebd9101 [ 24.285434] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.286077] page_type: 0xffffffff() [ 24.286522] raw: 0100000000000200 ffff8880087a0c80 ffffea000036edc0 dead000000000008 [ 24.287443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd9101 [ 24.288348] page dumped because: kasan: bad access detected [ 24.289017] [ 24.289245] Memory state around the buggy address: [ 24.289822] ffff88800efed800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.290675] ffff88800efed880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.291523] >ffff88800efed900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.292374] ^ [ 24.293186] ffff88800efed980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.294083] ffff88800efeda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.294939] ================================================================== [ 24.295942] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.256423] sshd (219) used greatest stack depth: 24120 bytes left [ 26.257467] BUG: Bad rss-counter state mm:0000000016228e4b type:MM_FILEPAGES val:33 [ 26.258385] BUG: Bad rss-counter state mm:0000000016228e4b type:MM_ANONPAGES val:22 [ 26.736450] BUG: Bad rss-counter state mm:000000001a1a1adc type:MM_FILEPAGES val:33 [ 26.737576] BUG: Bad rss-counter state mm:000000001a1a1adc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46023' (ECDSA) to the list of known hosts. 2023/06/20 18:50:44 fuzzer started 2023/06/20 18:50:44 dialing manager at localhost:36067 2023/06/20 18:50:44 checking machine... 2023/06/20 18:50:44 checking revisions... [ 27.444061] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:50:44 testing simple program... [ 27.493698] cgroup: Unknown subsys name 'net' [ 27.532550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:43 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888010168000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880101683f4 RBP=ffff888010168000 RSP=ffff888010177878 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888010168000 R13=dffffc0000000000 R14=ffff88800e13b810 R15=0000000000000001 RIP=ffffffff81374581 RFL=00000202 [-------] 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 00007f1e59439900 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=00007f0a3ec49650 CR3=000000000f23c000 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=1b1c2c94ab026998ef477ab76092f530 XMM02=eff9b2d0a8fce9cb000000000011a870 XMM03=2c67c8bc2e329bc3000000000011a998 XMM04=2c6b9dbbb7a6d98e00000000000ae988 XMM05=fdf677a1bddbf61b00000000001329c8 XMM06=806171799158d9670000000000131448 XMM07=fb795ef6d657705600000000001217e8 XMM08=2c67c8bc2e329bc3000000000011a998 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffcb8142e28 CR3=0000000015808000 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=2033343a30353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a30353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000