[ 30.234055] BUG: Bad rss-counter state mm:00000000dac67502 type:MM_FILEPAGES val:33 [ 30.235649] BUG: Bad rss-counter state mm:00000000dac67502 type:MM_ANONPAGES val:22 [ 30.413005] ================================================================== [ 30.414114] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.415247] Read of size 8 at addr ffff8880094b5968 by task sshd/220 [ 30.416310] [ 30.416576] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.417603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.418747] Call Trace: [ 30.419087] <TASK> [ 30.419389] dump_stack_lvl+0x91/0xf0 [ 30.419912] print_report+0xcc/0x620 [ 30.420439] ? __virt_addr_valid+0x102/0x340 [ 30.421030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.421696] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.422355] kasan_report+0xbe/0xf0 [ 30.422885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.423579] vma_interval_tree_remove+0xc75/0xec0 [ 30.424303] vma_prepare+0xc54/0x11a0 [ 30.424833] __split_vma+0x5af/0x950 [ 30.425356] ? __pfx___split_vma+0x10/0x10 [ 30.425958] ? find_held_lock+0x2c/0x110 [ 30.426532] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.427158] ? lock_is_held_type+0x9f/0x120 [ 30.427754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.428425] ? mtree_range_walk+0x632/0x900 [ 30.429038] ? mas_walk+0x5c7/0x7c0 [ 30.429556] do_vmi_munmap+0x1f1/0x2b0 [ 30.430103] mmap_region+0x1f9/0x2660 [ 30.430639] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.431198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.431983] ? __pfx_lock_acquire+0x10/0x10 [ 30.432573] ? __pfx_mmap_region+0x10/0x10 [ 30.433159] ? security_mmap_addr+0x7d/0xa0 [ 30.433754] ? get_unmapped_area+0x1f5/0x3f0 [ 30.434362] do_mmap+0x854/0xf00 [ 30.434852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.435400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.436019] ksys_mmap_pgoff+0x3af/0x500 [ 30.436587] do_syscall_64+0x3f/0x90 [ 30.437114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.437848] RIP: 0033:0x7f8a9ed87d82 [ 30.438366] 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 [ 30.440727] RSP: 002b:00007ffc58921408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.441734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a9ed87d82 [ 30.442676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a9e1c1000 [ 30.443616] RBP: 00007f8a9e1c1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.444561] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ba2f02ec0 [ 30.445501] R13: 00007ffc58921420 R14: 00007ffc58921450 R15: 00007ffc589217b0 [ 30.446451] </TASK> [ 30.446775] [ 30.447013] Allocated by task 212: [ 30.447472] kasan_save_stack+0x22/0x50 [ 30.448032] kasan_set_track+0x25/0x30 [ 30.448579] __kasan_slab_alloc+0x59/0x70 [ 30.449160] kmem_cache_alloc+0x16b/0x370 [ 30.449746] vm_area_dup+0x20/0x160 [ 30.450250] __split_vma+0x170/0x950 [ 30.450770] split_vma+0xc6/0x110 [ 30.451257] mprotect_fixup+0x8d2/0xb30 [ 30.451817] do_mprotect_pkey+0x87e/0xd40 [ 30.452398] __x64_sys_mprotect+0x78/0xc0 [ 30.452977] do_syscall_64+0x3f/0x90 [ 30.453507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.454225] [ 30.454464] Freed by task 212: [ 30.454896] kasan_save_stack+0x22/0x50 [ 30.455446] kasan_set_track+0x25/0x30 [ 30.455990] kasan_save_free_info+0x2b/0x50 [ 30.456581] __kasan_slab_free+0x10a/0x190 [ 30.457230] kmem_cache_free+0x10d/0x4d0 [ 30.457822] rcu_core+0x8c8/0x2860 [ 30.458314] __do_softirq+0x1b7/0x7d4 [ 30.458845] [ 30.459083] Last potentially related work creation: [ 30.459731] kasan_save_stack+0x22/0x50 [ 30.460291] __kasan_record_aux_stack+0x8e/0xa0 [ 30.460925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.461641] remove_vma+0x139/0x170 [ 30.462147] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.462766] do_vmi_munmap+0x1f1/0x2b0 [ 30.463298] __vm_munmap+0x138/0x3a0 [ 30.463818] __x64_sys_munmap+0x59/0x80 [ 30.464362] do_syscall_64+0x3f/0x90 [ 30.464890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.465600] [ 30.465850] The buggy address belongs to the object at ffff8880094b5910 [ 30.465850] which belongs to the cache vm_area_struct of size 168 [ 30.467463] The buggy address is located 88 bytes inside of [ 30.467463] freed 168-byte region [ffff8880094b5910, ffff8880094b59b8) [ 30.469020] [ 30.469257] The buggy address belongs to the physical page: [ 30.469999] page:00000000600febad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94b5 [ 30.471199] memcg:ffff88800dbcdc01 [ 30.471672] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.472389] page_type: 0xffffffff() [ 30.472889] raw: 0100000000000200 ffff88800879fc80 ffffea000038fe00 dead000000000008 [ 30.473914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbcdc01 [ 30.474928] page dumped because: kasan: bad access detected [ 30.475659] [ 30.475896] Memory state around the buggy address: [ 30.476540] ffff8880094b5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.477495] ffff8880094b5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.478458] >ffff8880094b5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.479407] ^ [ 30.480274] ffff8880094b5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.481228] ffff8880094b5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.482180] ================================================================== [ 30.483249] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.488471] BUG: Bad rss-counter state mm:000000006b5f562d type:MM_FILEPAGES val:33 [ 32.489453] BUG: Bad rss-counter state mm:000000006b5f562d type:MM_ANONPAGES val:22 [ 33.078286] BUG: Bad rss-counter state mm:000000002bd268a7 type:MM_FILEPAGES val:33 [ 33.079274] BUG: Bad rss-counter state mm:000000002bd268a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50844' (ECDSA) to the list of known hosts. 2023/06/20 06:35:40 fuzzer started 2023/06/20 06:35:41 dialing manager at localhost:44161 2023/06/20 06:35:41 checking machine... 2023/06/20 06:35:41 checking revisions... [ 33.713639] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:35:41 testing simple program... [ 33.751929] cgroup: Unknown subsys name 'net' [ 33.849454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880088dcb00 RCX=1ffff11001bb1f61 RDX=0000000000000001 RSI=1ffffffff0ba7a02 RDI=ffff88800dd8fb08 RBP=00000000000000c3 RSP=ffff88800ebb7a08 R8 =ffff88800dd8faf0 R9 =ffff88800ebb7aa8 R10=0000000000000003 R11=0000000000000001 R12=0000000000000001 R13=0000000000000010 R14=0000000000000010 R15=00000000000000c3 RIP=ffffffff812a0ab3 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 00007fbcfdd27900 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=00007fbcfe2dc650 CR3=000000000c4e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000066a480 RBX=ffff888019a924c0 RCX=ffffea0000000000 RDX=ffffea000066a401 RSI=ffffffff818d9dc6 RDI=ffff8880087c7280 RBP=ffff88806cf09e40 RSP=ffff88806cf09e10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087c7280 R13=ffffea000066a400 R14=ffffffff818d9dc6 R15=ffff888019a926f0 RIP=ffffffff81809ba5 RFL=00000202 [-------] 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 00007ff523e2a700 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=00007efe12b00028 CR3=00000000146a8000 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=2030343a35333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000