[ 88.038195] BUG: Bad rss-counter state mm:0000000073275e32 type:MM_FILEPAGES val:33 [ 88.039328] BUG: Bad rss-counter state mm:0000000073275e32 type:MM_ANONPAGES val:22 [ 88.174802] ================================================================== [ 88.175470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 88.176147] Read of size 8 at addr ffff88800d9204e0 by task sshd/229 [ 88.176680] [ 88.176835] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 88.177426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 88.178129] Call Trace: [ 88.178355] [ 88.178561] dump_stack_lvl+0x91/0xf0 [ 88.178920] print_report+0xcc/0x620 [ 88.179345] ? __virt_addr_valid+0x102/0x340 [ 88.179738] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.180169] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.180595] kasan_report+0xbe/0xf0 [ 88.180933] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.181386] vma_interval_tree_remove+0xc75/0xec0 [ 88.181832] vma_prepare+0xc54/0x11a0 [ 88.182161] __split_vma+0x5af/0x950 [ 88.182489] ? __pfx___split_vma+0x10/0x10 [ 88.182865] ? find_held_lock+0x2c/0x110 [ 88.183230] do_vmi_align_munmap+0x2ba/0x11f0 [ 88.183622] ? lock_is_held_type+0x9f/0x120 [ 88.184003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 88.184424] ? mtree_range_walk+0x632/0x900 [ 88.184806] ? mas_walk+0x5c7/0x7c0 [ 88.185141] do_vmi_munmap+0x1f1/0x2b0 [ 88.185530] mmap_region+0x1f9/0x2660 [ 88.185856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 88.186215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 88.186777] ? __pfx_lock_acquire+0x10/0x10 [ 88.187138] ? __pfx_mmap_region+0x10/0x10 [ 88.187506] ? security_mmap_addr+0x7d/0xa0 [ 88.187880] ? get_unmapped_area+0x1f5/0x3f0 [ 88.188253] do_mmap+0x854/0xf00 [ 88.188552] vm_mmap_pgoff+0x1a6/0x3a0 [ 88.188902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 88.189302] ksys_mmap_pgoff+0x3af/0x500 [ 88.189697] do_syscall_64+0x3f/0x90 [ 88.190034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.190487] RIP: 0033:0x7f549f94ed82 [ 88.190813] 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 [ 88.192298] RSP: 002b:00007ffde3bad898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 88.192925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f549f94ed82 [ 88.193531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f549ed88000 [ 88.194126] RBP: 00007f549ed88000 R08: 0000000000000009 R09: 0000000000001000 [ 88.194721] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4c3ff0d90 [ 88.195314] R13: 00007ffde3bad8b0 R14: 00007ffde3bad8e0 R15: 00007ffde3badc40 [ 88.195921] [ 88.196128] [ 88.196284] Allocated by task 212: [ 88.196587] kasan_save_stack+0x22/0x50 [ 88.196946] kasan_set_track+0x25/0x30 [ 88.197291] __kasan_slab_alloc+0x59/0x70 [ 88.197675] kmem_cache_alloc+0x16b/0x370 [ 88.198038] vm_area_dup+0x20/0x160 [ 88.198354] __split_vma+0x170/0x950 [ 88.198679] split_vma+0xc6/0x110 [ 88.198982] mprotect_fixup+0x8d2/0xb30 [ 88.199325] do_mprotect_pkey+0x87e/0xd40 [ 88.199691] __x64_sys_mprotect+0x78/0xc0 [ 88.200058] do_syscall_64+0x3f/0x90 [ 88.200393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.200843] [ 88.200996] Freed by task 212: [ 88.201271] kasan_save_stack+0x22/0x50 [ 88.201653] kasan_set_track+0x25/0x30 [ 88.201996] kasan_save_free_info+0x2b/0x50 [ 88.202361] __kasan_slab_free+0x10a/0x190 [ 88.202739] kmem_cache_free+0x10d/0x4d0 [ 88.203096] rcu_core+0x8c8/0x2860 [ 88.203411] __do_softirq+0x1b7/0x7d4 [ 88.203751] [ 88.203907] Last potentially related work creation: [ 88.204320] kasan_save_stack+0x22/0x50 [ 88.204681] __kasan_record_aux_stack+0x8e/0xa0 [ 88.205088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 88.205556] remove_vma+0x139/0x170 [ 88.205871] do_vmi_align_munmap+0xd4a/0x11f0 [ 88.206262] do_vmi_munmap+0x1f1/0x2b0 [ 88.206604] __vm_munmap+0x138/0x3a0 [ 88.206927] __x64_sys_munmap+0x59/0x80 [ 88.207272] do_syscall_64+0x3f/0x90 [ 88.207608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.208058] [ 88.208212] Second to last potentially related work creation: [ 88.208682] kasan_save_stack+0x22/0x50 [ 88.209036] __kasan_record_aux_stack+0x8e/0xa0 [ 88.209447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 88.209923] remove_vma+0x139/0x170 [ 88.210240] do_vmi_align_munmap+0xd4a/0x11f0 [ 88.210628] do_vmi_munmap+0x1f1/0x2b0 [ 88.210968] mmap_region+0x1f9/0x2660 [ 88.211305] do_mmap+0x854/0xf00 [ 88.211609] vm_mmap_pgoff+0x1a6/0x3a0 [ 88.211955] ksys_mmap_pgoff+0x3af/0x500 [ 88.212303] do_syscall_64+0x3f/0x90 [ 88.212636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.213083] [ 88.213234] The buggy address belongs to the object at ffff88800d920488 [ 88.213234] which belongs to the cache vm_area_struct of size 168 [ 88.214246] The buggy address is located 88 bytes inside of [ 88.214246] freed 168-byte region [ffff88800d920488, ffff88800d920530) [ 88.215255] [ 88.215409] The buggy address belongs to the physical page: [ 88.215858] page:0000000031ccec45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd920 [ 88.216634] memcg:ffff88800db10a01 [ 88.216940] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 88.217599] page_type: 0xffffffff() [ 88.217931] raw: 0100000000000200 ffff88800879fc80 ffffea00003ba840 dead000000000003 [ 88.218557] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db10a01 [ 88.219189] page dumped because: kasan: bad access detected [ 88.219772] [ 88.219924] Memory state around the buggy address: [ 88.220312] ffff88800d920380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 88.220918] ffff88800d920400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 88.221530] >ffff88800d920480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 88.222100] ^ [ 88.222586] ffff88800d920500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 88.223175] ffff88800d920580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 88.223773] ================================================================== [ 88.224652] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 90.271281] BUG: Bad rss-counter state mm:00000000dd2d45a7 type:MM_FILEPAGES val:33 [ 90.272425] BUG: Bad rss-counter state mm:00000000dd2d45a7 type:MM_ANONPAGES val:22 [ 90.643324] BUG: Bad rss-counter state mm:00000000c724c8f2 type:MM_FILEPAGES val:33 [ 90.644330] BUG: Bad rss-counter state mm:00000000c724c8f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2156' (ECDSA) to the list of known hosts. 2023/06/20 09:34:19 fuzzer started 2023/06/20 09:34:20 dialing manager at localhost:44161 2023/06/20 09:34:20 checking machine... 2023/06/20 09:34:20 checking revisions... [ 91.220835] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:34:20 testing simple program... [ 91.260102] cgroup: Unknown subsys name 'net' [ 91.291803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:52 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=0000000000000001 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=00007ffe26032408 CR3=0000000005482000 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=00007fc951f91510000055843af90790 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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88801694fc88 RSI=0000000000000000 RDI=ffff88801694f940 RBP=ffff88801694f9c8 RSP=ffff88801694f930 R8 =ffffffff8613751e R9 =ffff88801694f970 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801694f9f8 R13=0000000000000000 R14=ffff88800f10b680 R15=ffff88800e18b880 RIP=ffffffff810bd05d 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 00007f5255158900 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=00007f525570f618 CR3=000000000feae000 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=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