[ 23.936643] BUG: Bad rss-counter state mm:00000000c82042b6 type:MM_FILEPAGES val:33 [ 23.938042] BUG: Bad rss-counter state mm:00000000c82042b6 type:MM_ANONPAGES val:22 [ 24.086651] ================================================================== [ 24.088066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.089721] Read of size 8 at addr ffff888016760a50 by task sshd/218 [ 24.090945] [ 24.091316] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.092540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.093902] Call Trace: [ 24.094344] [ 24.094733] dump_stack_lvl+0x91/0xf0 [ 24.095398] print_report+0xcc/0x620 [ 24.096065] ? __virt_addr_valid+0x102/0x340 [ 24.096839] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.097694] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.098546] kasan_report+0xbe/0xf0 [ 24.099185] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100035] vma_interval_tree_remove+0xc75/0xec0 [ 24.100877] vma_prepare+0xc54/0x11a0 [ 24.101535] __split_vma+0x5af/0x950 [ 24.102166] ? __pfx___split_vma+0x10/0x10 [ 24.102887] ? find_held_lock+0x2c/0x110 [ 24.103584] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.104351] ? lock_is_held_type+0x9f/0x120 [ 24.105081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.105903] ? mtree_range_walk+0x632/0x900 [ 24.106651] ? mas_walk+0x5c7/0x7c0 [ 24.107293] do_vmi_munmap+0x1f1/0x2b0 [ 24.107951] mmap_region+0x1f9/0x2660 [ 24.108613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.109292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.110264] ? __pfx_lock_acquire+0x10/0x10 [ 24.110989] ? __pfx_mmap_region+0x10/0x10 [ 24.111708] ? security_mmap_addr+0x7d/0xa0 [ 24.112448] ? get_unmapped_area+0x1f5/0x3f0 [ 24.113195] do_mmap+0x854/0xf00 [ 24.113729] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.114257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.114974] ksys_mmap_pgoff+0x3af/0x500 [ 24.115512] do_syscall_64+0x3f/0x90 [ 24.116023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116718] RIP: 0033:0x7f04641eed82 [ 24.117214] 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 [ 24.119441] RSP: 002b:00007ffc35cd3798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.120392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04641eed82 [ 24.121284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0463628000 [ 24.122169] RBP: 00007f0463628000 R08: 0000000000000009 R09: 0000000000001000 [ 24.123062] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568d4e18ec0 [ 24.123946] R13: 00007ffc35cd37b0 R14: 00007ffc35cd37e0 R15: 00007ffc35cd3b40 [ 24.124905] [ 24.125222] [ 24.125454] Allocated by task 211: [ 24.125925] kasan_save_stack+0x22/0x50 [ 24.126475] kasan_set_track+0x25/0x30 [ 24.127011] __kasan_slab_alloc+0x59/0x70 [ 24.127574] kmem_cache_alloc+0x16b/0x370 [ 24.128128] vm_area_dup+0x20/0x160 [ 24.128634] __split_vma+0x170/0x950 [ 24.129143] split_vma+0xc6/0x110 [ 24.129686] mprotect_fixup+0x8d2/0xb30 [ 24.130223] do_mprotect_pkey+0x87e/0xd40 [ 24.130844] __x64_sys_mprotect+0x78/0xc0 [ 24.131408] do_syscall_64+0x3f/0x90 [ 24.131930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.132650] [ 24.132887] Freed by task 209: [ 24.133318] kasan_save_stack+0x22/0x50 [ 24.133861] kasan_set_track+0x25/0x30 [ 24.134391] kasan_save_free_info+0x2b/0x50 [ 24.134970] __kasan_slab_free+0x10a/0x190 [ 24.135540] kmem_cache_free+0x10d/0x4d0 [ 24.136098] rcu_core+0x8c8/0x2860 [ 24.136584] __do_softirq+0x1b7/0x7d4 [ 24.137096] [ 24.137337] Last potentially related work creation: [ 24.137981] kasan_save_stack+0x22/0x50 [ 24.138529] __kasan_record_aux_stack+0x8e/0xa0 [ 24.139153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.139855] remove_vma+0x139/0x170 [ 24.140340] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.140960] do_vmi_munmap+0x1f1/0x2b0 [ 24.141485] __vm_munmap+0x138/0x3a0 [ 24.141988] __x64_sys_munmap+0x59/0x80 [ 24.142517] do_syscall_64+0x3f/0x90 [ 24.143020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.143705] [ 24.143935] The buggy address belongs to the object at ffff8880167609f8 [ 24.143935] which belongs to the cache vm_area_struct of size 168 [ 24.145535] The buggy address is located 88 bytes inside of [ 24.145535] freed 168-byte region [ffff8880167609f8, ffff888016760aa0) [ 24.147055] [ 24.147284] The buggy address belongs to the physical page: [ 24.147984] page:00000000799c08bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16760 [ 24.149167] memcg:ffff888009849701 [ 24.149624] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.150370] page_type: 0xffffffff() [ 24.150854] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 24.151831] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009849701 [ 24.152818] page dumped because: kasan: bad access detected [ 24.153512] [ 24.153741] Memory state around the buggy address: [ 24.154361] ffff888016760900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.155268] ffff888016760980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.156178] >ffff888016760a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.157096] ^ [ 24.157862] ffff888016760a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.158777] ffff888016760b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.159828] ================================================================== [ 24.160873] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.239408] BUG: Bad rss-counter state mm:000000009d47ec71 type:MM_FILEPAGES val:33 [ 26.240763] BUG: Bad rss-counter state mm:000000009d47ec71 type:MM_ANONPAGES val:22 [ 26.709207] BUG: Bad rss-counter state mm:00000000b0e71757 type:MM_FILEPAGES val:33 [ 26.710378] BUG: Bad rss-counter state mm:00000000b0e71757 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50189' (ECDSA) to the list of known hosts. 2023/06/19 19:49:19 fuzzer started 2023/06/19 19:49:19 dialing manager at localhost:44161 2023/06/19 19:49:19 checking machine... 2023/06/19 19:49:19 checking revisions... [ 27.312541] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:49:19 testing simple program... [ 27.349535] cgroup: Unknown subsys name 'net' [ 27.397296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:18 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000200 RCX=ffffffff81534376 RDX=0000000000000004 RSI=0000000000000008 RDI=ffff88806ce3a2d4 RBP=ffffffff8136ab8d RSP=ffff88806ce09e20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000005e75 R15=ffff88806ce3a2d2 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007fdcc10a7700 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=00007f331027d650 CR3=000000000e3c4000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38393633352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000040000000 RBX=ffff888015b2cd00 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffff888015b2cd40 RBP=ffff888015b2cd10 RSP=ffff888008e27ca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c58400 R12=0000000000000007 R13=0000000000000000 R14=ffff888015b2cd40 R15=0000000000000001 RIP=ffffffff810b5964 RFL=00000046 [---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 00007f0f87b3f900 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=00007f0f86fb6570 CR3=000000000c6ce000 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=2f12db2de1d068bbf04669219ec599ea XMM02=2c67c8bc2e329bc30000000000122638 XMM03=fb795ef6d65770560000000000124ca8 XMM04=fa0fe128299c544400000000000ae988 XMM05=751b9502027dc0b90000000000134588 XMM06=9762b686a6587e480000000000133760 XMM07=e042d86d42eb936e0000000000124f80 XMM08=4154f2931ff52d6f0000000000122698 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000