[ 30.368574] sshd (209) used greatest stack depth: 23992 bytes left [ 30.369563] BUG: Bad rss-counter state mm:00000000fcd77858 type:MM_FILEPAGES val:33 [ 30.370835] BUG: Bad rss-counter state mm:00000000fcd77858 type:MM_ANONPAGES val:22 [ 30.541056] ================================================================== [ 30.542164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.543457] Read of size 8 at addr ffff88801bc45310 by task sshd/218 [ 30.544281] [ 30.544517] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.545471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.546530] Call Trace: [ 30.546905] [ 30.547214] dump_stack_lvl+0x91/0xf0 [ 30.547743] print_report+0xcc/0x620 [ 30.548271] ? __virt_addr_valid+0x102/0x340 [ 30.548861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.549531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.550205] kasan_report+0xbe/0xf0 [ 30.550729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.551398] vma_interval_tree_remove+0xc75/0xec0 [ 30.552034] vma_prepare+0xc54/0x11a0 [ 30.552549] __split_vma+0x5af/0x950 [ 30.553055] ? __pfx___split_vma+0x10/0x10 [ 30.553618] ? find_held_lock+0x2c/0x110 [ 30.554173] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.554796] ? lock_is_held_type+0x9f/0x120 [ 30.555367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.556012] ? mtree_range_walk+0x632/0x900 [ 30.556600] ? mas_walk+0x5c7/0x7c0 [ 30.557102] do_vmi_munmap+0x1f1/0x2b0 [ 30.557625] mmap_region+0x1f9/0x2660 [ 30.558139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.558700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.559459] ? __pfx_lock_acquire+0x10/0x10 [ 30.560028] ? __pfx_mmap_region+0x10/0x10 [ 30.560589] ? security_mmap_addr+0x7d/0xa0 [ 30.561152] ? get_unmapped_area+0x1f5/0x3f0 [ 30.561735] do_mmap+0x854/0xf00 [ 30.562204] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.562752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.563347] ksys_mmap_pgoff+0x3af/0x500 [ 30.563887] do_syscall_64+0x3f/0x90 [ 30.564396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.565080] RIP: 0033:0x7f44bc475d82 [ 30.565565] 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 [ 30.567838] RSP: 002b:00007ffdb41846c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.568812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44bc475d82 [ 30.569717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44bb8af000 [ 30.570647] RBP: 00007f44bb8af000 R08: 0000000000000009 R09: 0000000000001000 [ 30.571550] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619eaf64d90 [ 30.572463] R13: 00007ffdb41846e0 R14: 00007ffdb4184710 R15: 00007ffdb4184a70 [ 30.573384] [ 30.573697] [ 30.573928] Allocated by task 209: [ 30.574389] kasan_save_stack+0x22/0x50 [ 30.574937] kasan_set_track+0x25/0x30 [ 30.575471] __kasan_slab_alloc+0x59/0x70 [ 30.576028] kmem_cache_alloc+0x16b/0x370 [ 30.576579] vm_area_dup+0x20/0x160 [ 30.577065] __split_vma+0x170/0x950 [ 30.577565] split_vma+0xc6/0x110 [ 30.578038] mprotect_fixup+0x8d2/0xb30 [ 30.578586] do_mprotect_pkey+0x87e/0xd40 [ 30.579142] __x64_sys_mprotect+0x78/0xc0 [ 30.579700] do_syscall_64+0x3f/0x90 [ 30.580210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580899] [ 30.581128] Freed by task 209: [ 30.581552] kasan_save_stack+0x22/0x50 [ 30.582092] kasan_set_track+0x25/0x30 [ 30.582651] kasan_save_free_info+0x2b/0x50 [ 30.583220] __kasan_slab_free+0x10a/0x190 [ 30.583798] kmem_cache_free+0x10d/0x4d0 [ 30.584411] rcu_core+0x8c8/0x2860 [ 30.584892] __do_softirq+0x1b7/0x7d4 [ 30.585405] [ 30.585635] Last potentially related work creation: [ 30.586258] kasan_save_stack+0x22/0x50 [ 30.586814] __kasan_record_aux_stack+0x8e/0xa0 [ 30.587436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.588129] remove_vma+0x139/0x170 [ 30.588618] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.589220] do_vmi_munmap+0x1f1/0x2b0 [ 30.589748] __vm_munmap+0x138/0x3a0 [ 30.590255] __x64_sys_munmap+0x59/0x80 [ 30.590815] do_syscall_64+0x3f/0x90 [ 30.591328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592026] [ 30.592259] The buggy address belongs to the object at ffff88801bc452b8 [ 30.592259] which belongs to the cache vm_area_struct of size 168 [ 30.593828] The buggy address is located 88 bytes inside of [ 30.593828] freed 168-byte region [ffff88801bc452b8, ffff88801bc45360) [ 30.595373] [ 30.595606] The buggy address belongs to the physical page: [ 30.596313] page:00000000225d129b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc45 [ 30.597487] memcg:ffff88801a3c6e01 [ 30.597964] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.598665] page_type: 0xffffffff() [ 30.599148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.600126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3c6e01 [ 30.601089] page dumped because: kasan: bad access detected [ 30.601785] [ 30.602016] Memory state around the buggy address: [ 30.602670] ffff88801bc45200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.603581] ffff88801bc45280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.604503] >ffff88801bc45300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.605418] ^ [ 30.605920] ffff88801bc45380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.606857] ffff88801bc45400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.607760] ================================================================== [ 30.608785] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.596731] BUG: Bad rss-counter state mm:00000000a582d83d type:MM_FILEPAGES val:33 [ 32.598060] BUG: Bad rss-counter state mm:00000000a582d83d type:MM_ANONPAGES val:22 [ 33.001030] BUG: Bad rss-counter state mm:00000000a2d95a03 type:MM_FILEPAGES val:33 [ 33.002173] BUG: Bad rss-counter state mm:00000000a2d95a03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14762' (ECDSA) to the list of known hosts. 2023/06/20 04:47:48 fuzzer started 2023/06/20 04:47:48 dialing manager at localhost:44161 2023/06/20 04:47:48 checking machine... 2023/06/20 04:47:48 checking revisions... [ 33.543951] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:47:48 testing simple program... [ 33.582702] cgroup: Unknown subsys name 'net' [ 33.622055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:48 Registers: info registers vcpu 0 RAX=00007f85c74e0e83 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016ba8001 RSI=ffff888016ba7f58 RDI=ffff888016ba7fd8 RBP=ffff888016ba79f8 RSP=ffff888016ba7928 R8 =ffffffff864b9d5a R9 =ffff888016ba79e0 R10=0000000000038001 R11=00000000000b6996 R12=ffff888016ba7a00 R13=ffff888016ba79e8 R14=ffff888016ba7f58 R15=ffff888016ba79a0 RIP=ffffffff8112fbf3 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 00007f85c6fee900 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=00007f85c75a3650 CR3=0000000018d94000 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=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf099c0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf02000 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff811304d1 RFL=00000282 [--S----] 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 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=00007ffdcdf51db8 CR3=0000000005482000 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=00007f40f99cf510000055cefdbad790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000