[ 55.907566] BUG: Bad rss-counter state mm:00000000245d8af2 type:MM_FILEPAGES val:33 [ 55.908573] BUG: Bad rss-counter state mm:00000000245d8af2 type:MM_ANONPAGES val:22 [ 56.070941] ================================================================== [ 56.071847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.072769] Read of size 8 at addr ffff888019b2f3f8 by task sshd/226 [ 56.073544] [ 56.073772] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.074753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.075733] Call Trace: [ 56.076054] [ 56.076339] dump_stack_lvl+0x91/0xf0 [ 56.076848] print_report+0xcc/0x620 [ 56.077331] ? __virt_addr_valid+0x102/0x340 [ 56.077892] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.078513] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.079128] kasan_report+0xbe/0xf0 [ 56.079609] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.080230] vma_interval_tree_remove+0xc75/0xec0 [ 56.080832] vma_prepare+0xc54/0x11a0 [ 56.081308] __split_vma+0x5af/0x950 [ 56.081788] ? __pfx___split_vma+0x10/0x10 [ 56.082314] ? find_held_lock+0x2c/0x110 [ 56.082833] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.083403] ? lock_is_held_type+0x9f/0x120 [ 56.083934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.084539] ? mtree_range_walk+0x632/0x900 [ 56.085085] ? mas_walk+0x5c7/0x7c0 [ 56.085556] do_vmi_munmap+0x1f1/0x2b0 [ 56.086067] mmap_region+0x1f9/0x2660 [ 56.086546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.087052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.087774] ? __pfx_lock_acquire+0x10/0x10 [ 56.088306] ? __pfx_mmap_region+0x10/0x10 [ 56.088834] ? security_mmap_addr+0x7d/0xa0 [ 56.089361] ? get_unmapped_area+0x1f5/0x3f0 [ 56.089918] do_mmap+0x854/0xf00 [ 56.090357] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.090851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.091410] ksys_mmap_pgoff+0x3af/0x500 [ 56.091912] do_syscall_64+0x3f/0x90 [ 56.092387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.093030] RIP: 0033:0x7f1eba193d82 [ 56.093490] 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 [ 56.095613] RSP: 002b:00007ffe1f665678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.096516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eba193d82 [ 56.097358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eb95cd000 [ 56.098216] RBP: 00007f1eb95cd000 R08: 0000000000000009 R09: 0000000000001000 [ 56.099055] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a26a37a980 [ 56.099896] R13: 00007ffe1f665690 R14: 00007ffe1f6656c0 R15: 00007ffe1f665a20 [ 56.100748] [ 56.101038] [ 56.101254] Allocated by task 213: [ 56.101686] kasan_save_stack+0x22/0x50 [ 56.102185] kasan_set_track+0x25/0x30 [ 56.102673] __kasan_slab_alloc+0x59/0x70 [ 56.103196] kmem_cache_alloc+0x16b/0x370 [ 56.103705] vm_area_dup+0x20/0x160 [ 56.104155] __split_vma+0x170/0x950 [ 56.104620] split_vma+0xc6/0x110 [ 56.105054] mprotect_fixup+0x8d2/0xb30 [ 56.105554] do_mprotect_pkey+0x87e/0xd40 [ 56.106097] __x64_sys_mprotect+0x78/0xc0 [ 56.106617] do_syscall_64+0x3f/0x90 [ 56.107085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.107721] [ 56.107942] Freed by task 213: [ 56.108329] kasan_save_stack+0x22/0x50 [ 56.108830] kasan_set_track+0x25/0x30 [ 56.109317] kasan_save_free_info+0x2b/0x50 [ 56.109852] __kasan_slab_free+0x10a/0x190 [ 56.110378] kmem_cache_free+0x10d/0x4d0 [ 56.110881] rcu_core+0x8c8/0x2860 [ 56.111325] __do_softirq+0x1b7/0x7d4 [ 56.111798] [ 56.112011] Last potentially related work creation: [ 56.112590] kasan_save_stack+0x22/0x50 [ 56.113092] __kasan_record_aux_stack+0x8e/0xa0 [ 56.113670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.114311] remove_vma+0x139/0x170 [ 56.114760] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.115312] do_vmi_munmap+0x1f1/0x2b0 [ 56.115796] __vm_munmap+0x138/0x3a0 [ 56.116261] __x64_sys_munmap+0x59/0x80 [ 56.116754] do_syscall_64+0x3f/0x90 [ 56.117223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.117881] [ 56.118094] The buggy address belongs to the object at ffff888019b2f3a0 [ 56.118094] which belongs to the cache vm_area_struct of size 168 [ 56.119557] The buggy address is located 88 bytes inside of [ 56.119557] freed 168-byte region [ffff888019b2f3a0, ffff888019b2f448) [ 56.120943] [ 56.121156] The buggy address belongs to the physical page: [ 56.121832] page:00000000ef585eb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b2f [ 56.122930] memcg:ffff888019b2c201 [ 56.123351] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 56.124044] page_type: 0xffffffff() [ 56.124500] raw: 0100000000000200 ffff88800879fc80 ffffea00003866c0 dead000000000005 [ 56.125417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b2c201 [ 56.126333] page dumped because: kasan: bad access detected [ 56.126990] [ 56.127204] Memory state around the buggy address: [ 56.127782] ffff888019b2f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 56.128630] ffff888019b2f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 56.129482] >ffff888019b2f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 56.130345] ^ [ 56.131179] ffff888019b2f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 56.132040] ffff888019b2f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.132883] ================================================================== [ 56.133884] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 58.112491] BUG: Bad rss-counter state mm:000000005a47dc1f type:MM_FILEPAGES val:33 [ 58.113488] BUG: Bad rss-counter state mm:000000005a47dc1f type:MM_ANONPAGES val:22 [ 58.575707] BUG: Bad rss-counter state mm:00000000a46db12e type:MM_FILEPAGES val:33 [ 58.576955] BUG: Bad rss-counter state mm:00000000a46db12e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64522' (ECDSA) to the list of known hosts. 2023/06/20 06:41:27 fuzzer started 2023/06/20 06:41:27 dialing manager at localhost:44161 2023/06/20 06:41:27 checking machine... 2023/06/20 06:41:27 checking revisions... [ 59.237424] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:41:28 testing simple program... [ 59.279120] cgroup: Unknown subsys name 'net' [ 59.315258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fb7f76d4720 CR3=000000000d4ae000 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=9c655f2efc4caebc9b4f6d4fe0940439 XMM02=000000000011d9e8ec2efd57dc4c00df XMM03=0000000000123bf0af488577c5138f15 XMM04=f12428b66285b86000000000000ae988 XMM05=be8fc2d42d453c150000000000133748 XMM06=13e856d8d71426c800000000001333d0 XMM07=e042d86d42eb936e0000000000123e70 XMM08=af488577c5138f15000000000011da48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888008daa670 RIP=ffffffff813781a6 RFL=00000206 [-----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 00007f7add940900 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=000055b5024aa954 CR3=000000000eac0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000