[ 31.012995] BUG: Bad rss-counter state mm:000000000aafa748 type:MM_FILEPAGES val:33 [ 31.014172] BUG: Bad rss-counter state mm:000000000aafa748 type:MM_ANONPAGES val:22 [ 31.051946] ================================================================== [ 31.053010] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.053990] Read of size 8 at addr ffff88800d681d08 by task sshd/220 [ 31.054779] [ 31.054998] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.055890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.056918] Call Trace: [ 31.057247] [ 31.057538] dump_stack_lvl+0x91/0xf0 [ 31.058042] print_report+0xcc/0x620 [ 31.058546] ? __virt_addr_valid+0x102/0x340 [ 31.059102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059732] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.060385] kasan_report+0xbe/0xf0 [ 31.060878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.061519] vma_interval_tree_remove+0xc75/0xec0 [ 31.062139] vma_prepare+0xc54/0x11a0 [ 31.062626] __split_vma+0x5af/0x950 [ 31.063116] ? __pfx___split_vma+0x10/0x10 [ 31.063646] ? find_held_lock+0x2c/0x110 [ 31.064186] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.064773] ? lock_is_held_type+0x9f/0x120 [ 31.065335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.065965] ? mtree_range_walk+0x632/0x900 [ 31.066538] ? mas_walk+0x5c7/0x7c0 [ 31.067024] do_vmi_munmap+0x1f1/0x2b0 [ 31.067532] mmap_region+0x1f9/0x2660 [ 31.068028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.068577] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.069310] ? __pfx_lock_acquire+0x10/0x10 [ 31.069851] ? __pfx_mmap_region+0x10/0x10 [ 31.070400] ? security_mmap_addr+0x7d/0xa0 [ 31.070947] ? get_unmapped_area+0x1f5/0x3f0 [ 31.071520] do_mmap+0x854/0xf00 [ 31.071974] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.072495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.073076] ksys_mmap_pgoff+0x3af/0x500 [ 31.073586] do_syscall_64+0x3f/0x90 [ 31.074081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074751] RIP: 0033:0x7f905689fd82 [ 31.075216] 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 [ 31.077393] RSP: 002b:00007ffd97e15c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.078324] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f905689fd82 [ 31.079196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9055cd9000 [ 31.080071] RBP: 00007f9055cd9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.080952] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563de4b9aec0 [ 31.081825] R13: 00007ffd97e15c80 R14: 00007ffd97e15cb0 R15: 00007ffd97e16010 [ 31.082713] [ 31.083014] [ 31.083239] Allocated by task 212: [ 31.083691] kasan_save_stack+0x22/0x50 [ 31.084204] kasan_set_track+0x25/0x30 [ 31.084739] __kasan_slab_alloc+0x59/0x70 [ 31.085275] kmem_cache_alloc+0x16b/0x370 [ 31.085868] vm_area_dup+0x20/0x160 [ 31.086336] __split_vma+0x170/0x950 [ 31.086821] split_vma+0xc6/0x110 [ 31.087267] mprotect_fixup+0x8d2/0xb30 [ 31.087777] do_mprotect_pkey+0x87e/0xd40 [ 31.088308] __x64_sys_mprotect+0x78/0xc0 [ 31.088855] do_syscall_64+0x3f/0x90 [ 31.089339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089986] [ 31.090207] Freed by task 212: [ 31.090603] kasan_save_stack+0x22/0x50 [ 31.091122] kasan_set_track+0x25/0x30 [ 31.091619] kasan_save_free_info+0x2b/0x50 [ 31.092162] __kasan_slab_free+0x10a/0x190 [ 31.092718] kmem_cache_free+0x10d/0x4d0 [ 31.093240] rcu_core+0x8c8/0x2860 [ 31.093692] __do_softirq+0x1b7/0x7d4 [ 31.094188] [ 31.094403] Last potentially related work creation: [ 31.095004] kasan_save_stack+0x22/0x50 [ 31.095524] __kasan_record_aux_stack+0x8e/0xa0 [ 31.096113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.096775] remove_vma+0x139/0x170 [ 31.097245] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.097802] do_vmi_munmap+0x1f1/0x2b0 [ 31.098304] __vm_munmap+0x138/0x3a0 [ 31.098782] __x64_sys_munmap+0x59/0x80 [ 31.099308] do_syscall_64+0x3f/0x90 [ 31.099794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.100467] [ 31.100685] Second to last potentially related work creation: [ 31.101383] kasan_save_stack+0x22/0x50 [ 31.101912] __kasan_record_aux_stack+0x8e/0xa0 [ 31.102501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.103152] remove_vma+0x139/0x170 [ 31.103615] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.104186] do_vmi_munmap+0x1f1/0x2b0 [ 31.104695] mmap_region+0x1f9/0x2660 [ 31.105175] do_mmap+0x854/0xf00 [ 31.105621] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.106109] ksys_mmap_pgoff+0x7d/0x500 [ 31.106608] do_syscall_64+0x3f/0x90 [ 31.107097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107771] [ 31.107994] The buggy address belongs to the object at ffff88800d681cb0 [ 31.107994] which belongs to the cache vm_area_struct of size 168 [ 31.109492] The buggy address is located 88 bytes inside of [ 31.109492] freed 168-byte region [ffff88800d681cb0, ffff88800d681d58) [ 31.110916] [ 31.111137] The buggy address belongs to the physical page: [ 31.111801] page:0000000085cc3267 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd681 [ 31.112919] memcg:ffff88800deebd01 [ 31.113357] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.114025] page_type: 0xffffffff() [ 31.114482] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fba40 dead000000000004 [ 31.115438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deebd01 [ 31.116366] page dumped because: kasan: bad access detected [ 31.117054] [ 31.117270] Memory state around the buggy address: [ 31.117860] ffff88800d681c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.118739] ffff88800d681c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.119620] >ffff88800d681d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.120506] ^ [ 31.120972] ffff88800d681d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.121854] ffff88800d681e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.122731] ================================================================== [ 31.124244] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.174210] BUG: Bad rss-counter state mm:00000000b5b04afa type:MM_FILEPAGES val:33 [ 33.175398] BUG: Bad rss-counter state mm:00000000b5b04afa type:MM_ANONPAGES val:22 [ 33.676328] BUG: Bad rss-counter state mm:0000000057b5538c type:MM_FILEPAGES val:33 [ 33.677512] BUG: Bad rss-counter state mm:0000000057b5538c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13956' (ECDSA) to the list of known hosts. 2023/06/20 20:29:54 fuzzer started 2023/06/20 20:29:54 dialing manager at localhost:36067 2023/06/20 20:29:54 checking machine... 2023/06/20 20:29:54 checking revisions... [ 34.301496] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:29:54 testing simple program... [ 34.351383] cgroup: Unknown subsys name 'net' [ 34.404296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:29:54 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff8604ebe0 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff88801a0071d8 R8 =ffffffff864b2008 R9 =ffff88801a0072d0 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebe4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc8e RFL=00000246 [---Z-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 00007f6a4a8fd900 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=00007f6a4aeb4618 CR3=00000000099fa000 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=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=ffff888008c04400 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=00007ffb787bc530 CR3=000000000cbb0000 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=070b9be4df19baaed74850385a01c67a XMM02=000000000011abe0eff9b2d0a8fce9cb XMM03=000000000011acb02c67c8bc2e329bc3 XMM04=6d2f21db09e551aa00000000000ae988 XMM05=ad79a59fc46aed9e00000000001339d0 XMM06=4fda316b135da52b0000000000132700 XMM07=e042d86d42eb936e0000000000121c78 XMM08=85a11384ad6182e9000000000011acb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000