[ 24.045947] BUG: Bad rss-counter state mm:000000009c00096a type:MM_FILEPAGES val:33 [ 24.046516] BUG: Bad rss-counter state mm:000000009c00096a type:MM_ANONPAGES val:22 [ 24.203273] ================================================================== [ 24.204135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.205019] Read of size 8 at addr ffff888016e8f5c8 by task sshd/218 [ 24.205743] [ 24.205947] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.206758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.207791] Call Trace: [ 24.208098] [ 24.208370] dump_stack_lvl+0x91/0xf0 [ 24.208838] print_report+0xcc/0x620 [ 24.209343] ? __virt_addr_valid+0x102/0x340 [ 24.209863] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.210442] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.211027] kasan_report+0xbe/0xf0 [ 24.211480] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.212065] vma_interval_tree_remove+0xc75/0xec0 [ 24.212647] vma_prepare+0xc54/0x11a0 [ 24.213145] __split_vma+0x5af/0x950 [ 24.213614] ? __pfx___split_vma+0x10/0x10 [ 24.214142] ? find_held_lock+0x2c/0x110 [ 24.214652] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.215206] ? lock_is_held_type+0x9f/0x120 [ 24.215735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.216342] ? mtree_range_walk+0x632/0x900 [ 24.216907] ? mas_walk+0x5c7/0x7c0 [ 24.217376] do_vmi_munmap+0x1f1/0x2b0 [ 24.217856] mmap_region+0x1f9/0x2660 [ 24.218339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.218831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.219537] ? __pfx_lock_acquire+0x10/0x10 [ 24.220057] ? __pfx_mmap_region+0x10/0x10 [ 24.220590] ? security_mmap_addr+0x7d/0xa0 [ 24.221154] ? get_unmapped_area+0x1f5/0x3f0 [ 24.221672] do_mmap+0x854/0xf00 [ 24.222093] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.222563] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.223091] ksys_mmap_pgoff+0x3af/0x500 [ 24.223573] do_syscall_64+0x3f/0x90 [ 24.224031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.224647] RIP: 0033:0x7ff08aff2d82 [ 24.225085] 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 [ 24.227080] RSP: 002b:00007ffd63943b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.227935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff08aff2d82 [ 24.228735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff08a42c000 [ 24.229560] RBP: 00007ff08a42c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.230403] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565505c16ec0 [ 24.231238] R13: 00007ffd63943b40 R14: 00007ffd63943b70 R15: 00007ffd63943ed0 [ 24.232077] [ 24.232356] [ 24.232562] Allocated by task 211: [ 24.232995] kasan_save_stack+0x22/0x50 [ 24.233485] kasan_set_track+0x25/0x30 [ 24.233969] __kasan_slab_alloc+0x59/0x70 [ 24.234475] kmem_cache_alloc+0x16b/0x370 [ 24.234975] vm_area_dup+0x20/0x160 [ 24.235410] __split_vma+0x170/0x950 [ 24.235859] split_vma+0xc6/0x110 [ 24.236285] mprotect_fixup+0x8d2/0xb30 [ 24.236776] do_mprotect_pkey+0x87e/0xd40 [ 24.237304] __x64_sys_mprotect+0x78/0xc0 [ 24.237808] do_syscall_64+0x3f/0x90 [ 24.238280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.238907] [ 24.239119] Freed by task 211: [ 24.239504] kasan_save_stack+0x22/0x50 [ 24.239993] kasan_set_track+0x25/0x30 [ 24.240476] kasan_save_free_info+0x2b/0x50 [ 24.241010] __kasan_slab_free+0x10a/0x190 [ 24.241538] kmem_cache_free+0x10d/0x4d0 [ 24.242032] rcu_core+0x8c8/0x2860 [ 24.242461] __do_softirq+0x1b7/0x7d4 [ 24.242931] [ 24.243140] Last potentially related work creation: [ 24.243720] kasan_save_stack+0x22/0x50 [ 24.244208] __kasan_record_aux_stack+0x8e/0xa0 [ 24.244773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.245415] remove_vma+0x139/0x170 [ 24.245851] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.246397] do_vmi_munmap+0x1f1/0x2b0 [ 24.246869] __vm_munmap+0x138/0x3a0 [ 24.247323] __x64_sys_munmap+0x59/0x80 [ 24.247809] do_syscall_64+0x3f/0x90 [ 24.248279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.248927] [ 24.249142] The buggy address belongs to the object at ffff888016e8f570 [ 24.249142] which belongs to the cache vm_area_struct of size 168 [ 24.250562] The buggy address is located 88 bytes inside of [ 24.250562] freed 168-byte region [ffff888016e8f570, ffff888016e8f618) [ 24.251930] [ 24.252145] The buggy address belongs to the physical page: [ 24.252785] page:0000000048a8f5df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e8f [ 24.253860] memcg:ffff88800deb8b01 [ 24.254281] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.254960] page_type: 0xffffffff() [ 24.255390] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.256288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deb8b01 [ 24.257174] page dumped because: kasan: bad access detected [ 24.257822] [ 24.258028] Memory state around the buggy address: [ 24.258597] ffff888016e8f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.259443] ffff888016e8f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.260282] >ffff888016e8f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.261137] ^ [ 24.261792] ffff888016e8f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.262631] ffff888016e8f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.263458] ================================================================== [ 24.264649] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.256567] BUG: Bad rss-counter state mm:00000000f80ea5cd type:MM_FILEPAGES val:33 [ 26.257497] BUG: Bad rss-counter state mm:00000000f80ea5cd type:MM_ANONPAGES val:22 [ 26.816261] BUG: Bad rss-counter state mm:00000000aef89ee4 type:MM_FILEPAGES val:33 [ 26.817419] BUG: Bad rss-counter state mm:00000000aef89ee4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1446' (ECDSA) to the list of known hosts. 2023/06/21 00:35:40 fuzzer started 2023/06/21 00:35:40 dialing manager at localhost:36067 2023/06/21 00:35:40 checking machine... 2023/06/21 00:35:40 checking revisions... [ 27.454563] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:35:40 testing simple program... [ 27.512919] cgroup: Unknown subsys name 'net' [ 27.548032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff81809add RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016b71b40 R15=ffff88800e4f91b0 RIP=ffffffff81130399 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 00007f0e4cbbf900 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=00007f0e4d176618 CR3=000000000e514000 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=563412feff00545000000000000080fe 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=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=00007f6b6bbd7018 CR3=0000000006920000 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=225653385ec11b829e412cae66f4de26 XMM02=ec2efd57dc4c00df000000000011aac8 XMM03=18ee1a220407f82f000000000011ab98 XMM04=23b006fc6abadb6100000000000ae988 XMM05=751b9502027dc0b900000000001310c8 XMM06=a9ffdd2e998b9ca200000000001302a0 XMM07=e042d86d42eb936e0000000000121890 XMM08=18ee1a220407f82f000000000011ab98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000