[ 32.468031] BUG: Bad rss-counter state mm:0000000015e4ec2c type:MM_FILEPAGES val:33 [ 32.469097] BUG: Bad rss-counter state mm:0000000015e4ec2c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.637047] ================================================================== [ 32.638178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.639213] Read of size 8 at addr ffff88800c5d1c20 by task sshd/218 [ 32.640107] [ 32.640328] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.641201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.642226] Call Trace: [ 32.642557] [ 32.642861] dump_stack_lvl+0x91/0xf0 [ 32.643356] print_report+0xcc/0x620 [ 32.643845] ? __virt_addr_valid+0x102/0x340 [ 32.644398] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.645034] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.645671] kasan_report+0xbe/0xf0 [ 32.646169] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.646795] vma_interval_tree_remove+0xc75/0xec0 [ 32.647397] vma_prepare+0xc54/0x11a0 [ 32.647880] __split_vma+0x5af/0x950 [ 32.648361] ? __pfx___split_vma+0x10/0x10 [ 32.648891] ? find_held_lock+0x2c/0x110 [ 32.649415] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.650003] ? lock_is_held_type+0x9f/0x120 [ 32.650544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.651161] ? mtree_range_walk+0x632/0x900 [ 32.651724] ? mas_walk+0x5c7/0x7c0 [ 32.652208] do_vmi_munmap+0x1f1/0x2b0 [ 32.652715] mmap_region+0x1f9/0x2660 [ 32.653197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.653717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.654463] ? __pfx_lock_acquire+0x10/0x10 [ 32.655014] ? __pfx_mmap_region+0x10/0x10 [ 32.655544] ? security_mmap_addr+0x7d/0xa0 [ 32.656083] ? get_unmapped_area+0x1f5/0x3f0 [ 32.656648] do_mmap+0x854/0xf00 [ 32.657088] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.657594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.658190] ksys_mmap_pgoff+0x3af/0x500 [ 32.658713] do_syscall_64+0x3f/0x90 [ 32.659190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.659839] RIP: 0033:0x7feaabcfdd82 [ 32.660294] 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 [ 32.662453] RSP: 002b:00007ffc8c3fcaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.663383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feaabcfdd82 [ 32.664258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feaab137000 [ 32.665100] RBP: 00007feaab137000 R08: 0000000000000009 R09: 0000000000001000 [ 32.665950] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c3d1dbf70 [ 32.666800] R13: 00007ffc8c3fcac0 R14: 00007ffc8c3fcaf0 R15: 00007ffc8c3fce50 [ 32.667648] [ 32.667946] [ 32.668171] Allocated by task 211: [ 32.668606] kasan_save_stack+0x22/0x50 [ 32.669124] kasan_set_track+0x25/0x30 [ 32.669618] __kasan_slab_alloc+0x59/0x70 [ 32.670171] kmem_cache_alloc+0x16b/0x370 [ 32.670694] vm_area_dup+0x20/0x160 [ 32.671161] __split_vma+0x170/0x950 [ 32.671638] split_vma+0xc6/0x110 [ 32.672082] mprotect_fixup+0x8d2/0xb30 [ 32.672592] do_mprotect_pkey+0x87e/0xd40 [ 32.673116] __x64_sys_mprotect+0x78/0xc0 [ 32.673636] do_syscall_64+0x3f/0x90 [ 32.674119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.674758] [ 32.674972] Freed by task 13: [ 32.675364] kasan_save_stack+0x22/0x50 [ 32.675873] kasan_set_track+0x25/0x30 [ 32.676372] kasan_save_free_info+0x2b/0x50 [ 32.676914] __kasan_slab_free+0x10a/0x190 [ 32.677459] kmem_cache_free+0x10d/0x4d0 [ 32.677993] rcu_core+0x8c8/0x2860 [ 32.678439] __do_softirq+0x1b7/0x7d4 [ 32.678916] [ 32.679131] Last potentially related work creation: [ 32.679726] kasan_save_stack+0x22/0x50 [ 32.680244] __kasan_record_aux_stack+0x8e/0xa0 [ 32.680828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.681486] remove_vma+0x139/0x170 [ 32.681964] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.682540] do_vmi_munmap+0x1f1/0x2b0 [ 32.683046] __vm_munmap+0x138/0x3a0 [ 32.683522] __x64_sys_munmap+0x59/0x80 [ 32.684021] do_syscall_64+0x3f/0x90 [ 32.684499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.685166] [ 32.685385] The buggy address belongs to the object at ffff88800c5d1bc8 [ 32.685385] which belongs to the cache vm_area_struct of size 168 [ 32.686886] The buggy address is located 88 bytes inside of [ 32.686886] freed 168-byte region [ffff88800c5d1bc8, ffff88800c5d1c70) [ 32.688304] [ 32.688529] The buggy address belongs to the physical page: [ 32.689188] page:00000000dd817e12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5d1 [ 32.690294] memcg:ffff88800e5e1901 [ 32.690727] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.691379] page_type: 0xffffffff() [ 32.691835] raw: 0100000000000200 ffff88800879fc80 ffffea0000313680 dead000000000006 [ 32.692756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5e1901 [ 32.693666] page dumped because: kasan: bad access detected [ 32.694345] [ 32.694569] Memory state around the buggy address: [ 32.695162] ffff88800c5d1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.696026] ffff88800c5d1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.696890] >ffff88800c5d1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.697735] ^ [ 32.698282] ffff88800c5d1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.699148] ffff88800c5d1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.700006] ================================================================== [ 32.700967] Disabling lock debugging due to kernel taint [ 34.701574] BUG: Bad rss-counter state mm:00000000aff312e0 type:MM_FILEPAGES val:33 [ 34.702570] BUG: Bad rss-counter state mm:00000000aff312e0 type:MM_ANONPAGES val:22 [ 35.226411] BUG: Bad rss-counter state mm:00000000794e571f type:MM_FILEPAGES val:33 [ 35.227617] BUG: Bad rss-counter state mm:00000000794e571f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4213' (ECDSA) to the list of known hosts. 2023/06/20 00:26:58 fuzzer started 2023/06/20 00:26:59 dialing manager at localhost:44161 2023/06/20 00:26:59 checking machine... 2023/06/20 00:26:59 checking revisions... [ 35.908324] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:26:59 testing simple program... [ 35.949453] cgroup: Unknown subsys name 'net' [ 36.016660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137501 RDX=1ffff1100d9c135a RSI=ffffffff8180cd09 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86137542 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff8880167f8000 R15=ffff88806ce09a78 RIP=ffffffff8113062c 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 00007f9ad06c2900 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=00007f9ad0c7a0b0 CR3=000000000ddc2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007fffefe49dc8 CR3=000000000dd70000 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=2038353a36323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000