[ 23.920528] BUG: Bad rss-counter state mm:0000000052097865 type:MM_FILEPAGES val:33 [ 23.921651] BUG: Bad rss-counter state mm:0000000052097865 type:MM_ANONPAGES val:22 [ 24.067329] ================================================================== [ 24.068371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.069326] Read of size 8 at addr ffff88801026bb38 by task sshd/220 [ 24.070269] [ 24.070488] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.071407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.072426] Call Trace: [ 24.072752] [ 24.073040] dump_stack_lvl+0x91/0xf0 [ 24.073541] print_report+0xcc/0x620 [ 24.074036] ? __virt_addr_valid+0x102/0x340 [ 24.074616] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.075281] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.075905] kasan_report+0xbe/0xf0 [ 24.076397] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.077030] vma_interval_tree_remove+0xc75/0xec0 [ 24.077653] vma_prepare+0xc54/0x11a0 [ 24.078147] __split_vma+0x5af/0x950 [ 24.078626] ? __pfx___split_vma+0x10/0x10 [ 24.079194] ? find_held_lock+0x2c/0x110 [ 24.079739] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.080307] ? lock_is_held_type+0x9f/0x120 [ 24.080857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.081476] ? mtree_range_walk+0x632/0x900 [ 24.082048] ? mas_walk+0x5c7/0x7c0 [ 24.082533] do_vmi_munmap+0x1f1/0x2b0 [ 24.083035] mmap_region+0x1f9/0x2660 [ 24.083566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.084082] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.084802] ? __pfx_lock_acquire+0x10/0x10 [ 24.085353] ? __pfx_mmap_region+0x10/0x10 [ 24.085892] ? security_mmap_addr+0x7d/0xa0 [ 24.086438] ? get_unmapped_area+0x1f5/0x3f0 [ 24.086987] do_mmap+0x854/0xf00 [ 24.087522] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.088024] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.088600] ksys_mmap_pgoff+0x3af/0x500 [ 24.089126] do_syscall_64+0x3f/0x90 [ 24.089608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.090263] RIP: 0033:0x7f54b8320d82 [ 24.090724] 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 [ 24.092886] RSP: 002b:00007fff4ac6ee68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.093806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54b8320d82 [ 24.094653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54b775a000 [ 24.095569] RBP: 00007f54b775a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.096438] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b37160ec0 [ 24.097299] R13: 00007fff4ac6ee80 R14: 00007fff4ac6eeb0 R15: 00007fff4ac6f210 [ 24.098178] [ 24.098472] [ 24.098689] Allocated by task 213: [ 24.099142] kasan_save_stack+0x22/0x50 [ 24.099671] kasan_set_track+0x25/0x30 [ 24.100175] __kasan_slab_alloc+0x59/0x70 [ 24.100714] kmem_cache_alloc+0x16b/0x370 [ 24.101243] vm_area_dup+0x20/0x160 [ 24.101699] __split_vma+0x170/0x950 [ 24.102172] split_vma+0xc6/0x110 [ 24.102614] mprotect_fixup+0x8d2/0xb30 [ 24.103120] do_mprotect_pkey+0x87e/0xd40 [ 24.103680] __x64_sys_mprotect+0x78/0xc0 [ 24.104217] do_syscall_64+0x3f/0x90 [ 24.104700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.105350] [ 24.105569] Freed by task 213: [ 24.105970] kasan_save_stack+0x22/0x50 [ 24.106482] kasan_set_track+0x25/0x30 [ 24.106989] kasan_save_free_info+0x2b/0x50 [ 24.107584] __kasan_slab_free+0x10a/0x190 [ 24.108135] kmem_cache_free+0x10d/0x4d0 [ 24.108657] rcu_core+0x8c8/0x2860 [ 24.109105] __do_softirq+0x1b7/0x7d4 [ 24.109589] [ 24.109807] Last potentially related work creation: [ 24.110396] kasan_save_stack+0x22/0x50 [ 24.110983] __kasan_record_aux_stack+0x8e/0xa0 [ 24.111609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.112264] remove_vma+0x139/0x170 [ 24.112728] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.113295] do_vmi_munmap+0x1f1/0x2b0 [ 24.113782] __vm_munmap+0x138/0x3a0 [ 24.114254] __x64_sys_munmap+0x59/0x80 [ 24.114759] do_syscall_64+0x3f/0x90 [ 24.115283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115936] [ 24.116159] Second to last potentially related work creation: [ 24.116850] kasan_save_stack+0x22/0x50 [ 24.117363] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118597] remove_vma+0x139/0x170 [ 24.119052] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.119675] do_vmi_munmap+0x1f1/0x2b0 [ 24.120164] mmap_region+0x1f9/0x2660 [ 24.120645] do_mmap+0x854/0xf00 [ 24.121083] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.121592] ksys_mmap_pgoff+0x3af/0x500 [ 24.122096] do_syscall_64+0x3f/0x90 [ 24.122587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.123275] [ 24.123490] The buggy address belongs to the object at ffff88801026bae0 [ 24.123490] which belongs to the cache vm_area_struct of size 168 [ 24.124979] The buggy address is located 88 bytes inside of [ 24.124979] freed 168-byte region [ffff88801026bae0, ffff88801026bb88) [ 24.126404] [ 24.126623] The buggy address belongs to the physical page: [ 24.127322] page:00000000cc63e7c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026b [ 24.128431] memcg:ffff88800ef8fa01 [ 24.128866] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.129527] page_type: 0xffffffff() [ 24.129982] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366bc0 dead000000000004 [ 24.130898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef8fa01 [ 24.131853] page dumped because: kasan: bad access detected [ 24.132515] [ 24.132734] Memory state around the buggy address: [ 24.133318] ffff88801026ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.134182] ffff88801026ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.135045] >ffff88801026bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.135941] ^ [ 24.136559] ffff88801026bb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.137420] ffff88801026bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.138281] ================================================================== [ 24.139265] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.978781] BUG: Bad rss-counter state mm:00000000dee2b8c2 type:MM_FILEPAGES val:33 [ 25.979606] BUG: Bad rss-counter state mm:00000000dee2b8c2 type:MM_ANONPAGES val:22 [ 26.553095] BUG: Bad rss-counter state mm:0000000023719bd1 type:MM_FILEPAGES val:33 [ 26.554360] BUG: Bad rss-counter state mm:0000000023719bd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21003' (ECDSA) to the list of known hosts. 2023/06/20 22:04:32 fuzzer started 2023/06/20 22:04:32 dialing manager at localhost:36067 2023/06/20 22:04:32 checking machine... 2023/06/20 22:04:32 checking revisions... [ 27.195952] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:04:32 testing simple program... [ 27.245489] cgroup: Unknown subsys name 'net' [ 27.283318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110011b3f7c RSP=ffff888008d9fbc0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffffffff8560b640 R13=ffffffff8182e272 R14=00000000fffffd78 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 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=00007ffdd5ddb658 CR3=0000000013b9e000 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=2031333a34303a3232203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323734313420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002b18f06 RSP=ffff8880158c7820 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806cf361a0 R13=ffffffff81839bda R14=00000000fffffeb8 R15=0000000000000000 RIP=ffffffff812d86f2 RFL=00000047 [---Z-PC] 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 00007f7a476f4900 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=00007f16ae909650 CR3=000000000c60e000 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=aef742d3e4afd2abc749d4c8368a8f30 XMM02=000000000011b840d59e07bde36eea69 XMM03=000000000011b968ec2efd57dc4c00df XMM04=dcfb46d7e38fde9b00000000000ae988 XMM05=47b83608c177f12400000000001341b0 XMM06=4fda316b135da52b0000000000132960 XMM07=fb795ef6d65770560000000000121c18 XMM08=2c67c8bc2e329bc3000000000011b968 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000