[ 25.377647] BUG: Bad rss-counter state mm:00000000dd2df1f8 type:MM_FILEPAGES val:33 [ 25.379854] BUG: Bad rss-counter state mm:00000000dd2df1f8 type:MM_ANONPAGES val:22 [ 25.486936] ================================================================== [ 25.488081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.489300] Read of size 8 at addr ffff88800fb03c20 by task sshd/218 [ 25.490498] [ 25.490786] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.491932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.492881] Call Trace: [ 25.493077] [ 25.493249] dump_stack_lvl+0x91/0xf0 [ 25.493546] print_report+0xcc/0x620 [ 25.493842] ? __virt_addr_valid+0x102/0x340 [ 25.494180] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.494566] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.494937] kasan_report+0xbe/0xf0 [ 25.495230] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.495606] vma_interval_tree_remove+0xc75/0xec0 [ 25.495970] vma_prepare+0xc54/0x11a0 [ 25.496259] __split_vma+0x5af/0x950 [ 25.496543] ? __pfx___split_vma+0x10/0x10 [ 25.496861] ? find_held_lock+0x2c/0x110 [ 25.497181] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.497522] ? lock_is_held_type+0x9f/0x120 [ 25.497848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.498215] ? mtree_range_walk+0x632/0x900 [ 25.498557] ? mas_walk+0x5c7/0x7c0 [ 25.498846] do_vmi_munmap+0x1f1/0x2b0 [ 25.499144] mmap_region+0x1f9/0x2660 [ 25.499436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.499744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.500178] ? __pfx_lock_acquire+0x10/0x10 [ 25.500498] ? __pfx_mmap_region+0x10/0x10 [ 25.500825] ? security_mmap_addr+0x7d/0xa0 [ 25.501146] ? get_unmapped_area+0x1f5/0x3f0 [ 25.501478] do_mmap+0x854/0xf00 [ 25.501743] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.502046] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.502397] ksys_mmap_pgoff+0x3af/0x500 [ 25.502712] do_syscall_64+0x3f/0x90 [ 25.503006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.503397] RIP: 0033:0x7f9d34f62d82 [ 25.503674] 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 [ 25.504936] RSP: 002b:00007ffec95652a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.505487] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d34f62d82 [ 25.505994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d3439c000 [ 25.506511] RBP: 00007f9d3439c000 R08: 0000000000000009 R09: 0000000000001000 [ 25.507021] R10: 0000000000000812 R11: 0000000000000206 R12: 000056378a5e9d90 [ 25.507529] R13: 00007ffec95652c0 R14: 00007ffec95652f0 R15: 00007ffec9565650 [ 25.508046] [ 25.508227] [ 25.508363] Allocated by task 211: [ 25.508624] kasan_save_stack+0x22/0x50 [ 25.508935] kasan_set_track+0x25/0x30 [ 25.509235] __kasan_slab_alloc+0x59/0x70 [ 25.509555] kmem_cache_alloc+0x16b/0x370 [ 25.509869] vm_area_dup+0x20/0x160 [ 25.510146] __split_vma+0x170/0x950 [ 25.510435] split_vma+0xc6/0x110 [ 25.510700] mprotect_fixup+0x8d2/0xb30 [ 25.511007] do_mprotect_pkey+0x87e/0xd40 [ 25.511320] __x64_sys_mprotect+0x78/0xc0 [ 25.511642] do_syscall_64+0x3f/0x90 [ 25.511932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.512321] [ 25.512451] Freed by task 211: [ 25.512691] kasan_save_stack+0x22/0x50 [ 25.512995] kasan_set_track+0x25/0x30 [ 25.513294] kasan_save_free_info+0x2b/0x50 [ 25.513612] __kasan_slab_free+0x10a/0x190 [ 25.513933] kmem_cache_free+0x10d/0x4d0 [ 25.514240] rcu_core+0x8c8/0x2860 [ 25.514521] __do_softirq+0x1b7/0x7d4 [ 25.514814] [ 25.514947] Last potentially related work creation: [ 25.515297] kasan_save_stack+0x22/0x50 [ 25.515600] __kasan_record_aux_stack+0x8e/0xa0 [ 25.515947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.516335] remove_vma+0x139/0x170 [ 25.516607] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.516941] do_vmi_munmap+0x1f1/0x2b0 [ 25.517235] __vm_munmap+0x138/0x3a0 [ 25.517516] __x64_sys_munmap+0x59/0x80 [ 25.517820] do_syscall_64+0x3f/0x90 [ 25.518107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.518495] [ 25.518632] The buggy address belongs to the object at ffff88800fb03bc8 [ 25.518632] which belongs to the cache vm_area_struct of size 168 [ 25.519517] The buggy address is located 88 bytes inside of [ 25.519517] freed 168-byte region [ffff88800fb03bc8, ffff88800fb03c70) [ 25.520358] [ 25.520490] The buggy address belongs to the physical page: [ 25.520887] page:000000004565f8e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb03 [ 25.521537] memcg:ffff88800ca8ec01 [ 25.521797] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.522219] page_type: 0xffffffff() [ 25.522502] raw: 0100000000000200 ffff88800879fc80 ffffea00005a4bc0 dead000000000005 [ 25.523051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca8ec01 [ 25.523594] page dumped because: kasan: bad access detected [ 25.523993] [ 25.524127] Memory state around the buggy address: [ 25.524474] ffff88800fb03b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.524989] ffff88800fb03b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.525501] >ffff88800fb03c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.526010] ^ [ 25.526328] ffff88800fb03c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.526855] ffff88800fb03d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.527367] ================================================================== [ 25.527919] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.462865] BUG: Bad rss-counter state mm:0000000086d170c2 type:MM_FILEPAGES val:33 [ 27.464033] BUG: Bad rss-counter state mm:0000000086d170c2 type:MM_ANONPAGES val:22 [ 27.910851] BUG: Bad rss-counter state mm:00000000a26996e1 type:MM_FILEPAGES val:33 [ 27.912029] BUG: Bad rss-counter state mm:00000000a26996e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35570' (ECDSA) to the list of known hosts. 2023/06/19 23:40:24 fuzzer started 2023/06/19 23:40:25 dialing manager at localhost:44161 2023/06/19 23:40:25 checking machine... 2023/06/19 23:40:25 checking revisions... [ 28.616000] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:40:25 testing simple program... [ 28.661343] cgroup: Unknown subsys name 'net' [ 28.717250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:40:23 Registers: info registers vcpu 0 RAX=000000000000004a RBX=0000000000000e60 RCX=0000000000000000 RDX=ffff888015db1b40 RSI=0000000000000e60 RDI=000000000000005a RBP=00007ff58c034000 RSP=ffff8880147c7a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000005a R13=00007ff58c0331a0 R14=0000000000000000 R15=1ffff110028f8f44 RIP=ffffffff816f2359 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 00007ff59ab65700 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=00007fcc38967618 CR3=000000000edae000 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=2034323a30343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30343a3332203931 XMM08=3d656e696c646d632022656369767265 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=00007fc35036f998 CR3=000000000c9c0000 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=7bc903e04ac4eda4054e91beb12396b9 XMM02=000000000011d9d0eff9b2d0a8fce9cb XMM03=000000000011daa02c67c8bc2e329bc3 XMM04=d383d0c6d5909c6d00000000000ae988 XMM05=751b9502027dc0b90000000000133550 XMM06=bbf225163963c39d0000000000132728 XMM07=e042d86d42eb936e0000000000123f98 XMM08=09509fc30fea7962000000000011daa0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000