[ 30.915225] BUG: Bad rss-counter state mm:00000000e4821765 type:MM_FILEPAGES val:33 [ 30.916504] BUG: Bad rss-counter state mm:00000000e4821765 type:MM_ANONPAGES val:22 [ 31.061180] ================================================================== [ 31.062028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.062907] Read of size 8 at addr ffff88801b927798 by task sshd/219 [ 31.063730] [ 31.063954] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.064759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.065679] Call Trace: [ 31.066021] [ 31.066315] dump_stack_lvl+0x91/0xf0 [ 31.066804] print_report+0xcc/0x620 [ 31.067303] ? __virt_addr_valid+0x102/0x340 [ 31.067893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069230] kasan_report+0xbe/0xf0 [ 31.069756] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070438] vma_interval_tree_remove+0xc75/0xec0 [ 31.071070] vma_prepare+0xc54/0x11a0 [ 31.071589] __split_vma+0x5af/0x950 [ 31.072076] ? __pfx___split_vma+0x10/0x10 [ 31.072639] ? find_held_lock+0x2c/0x110 [ 31.073197] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.073792] ? lock_is_held_type+0x9f/0x120 [ 31.074359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.075036] ? mtree_range_walk+0x632/0x900 [ 31.075625] ? mas_walk+0x5c7/0x7c0 [ 31.076119] do_vmi_munmap+0x1f1/0x2b0 [ 31.076638] mmap_region+0x1f9/0x2660 [ 31.077159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.077726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.078489] ? __pfx_lock_acquire+0x10/0x10 [ 31.079081] ? __pfx_mmap_region+0x10/0x10 [ 31.079649] ? security_mmap_addr+0x7d/0xa0 [ 31.080196] ? get_unmapped_area+0x1f5/0x3f0 [ 31.080783] do_mmap+0x854/0xf00 [ 31.081259] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082354] ksys_mmap_pgoff+0x3af/0x500 [ 31.082884] do_syscall_64+0x3f/0x90 [ 31.083400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084088] RIP: 0033:0x7f1e74cb1d82 [ 31.084587] 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 [ 31.086816] RSP: 002b:00007fff2b7b8e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.087791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e74cb1d82 [ 31.088696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e740eb000 [ 31.089637] RBP: 00007f1e740eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.090514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055634cffcf70 [ 31.091395] R13: 00007fff2b7b8ea0 R14: 00007fff2b7b8ed0 R15: 00007fff2b7b9230 [ 31.092302] [ 31.092606] [ 31.092842] Allocated by task 211: [ 31.093320] kasan_save_stack+0x22/0x50 [ 31.093867] kasan_set_track+0x25/0x30 [ 31.094387] __kasan_slab_alloc+0x59/0x70 [ 31.094941] kmem_cache_alloc+0x16b/0x370 [ 31.095489] vm_area_dup+0x20/0x160 [ 31.095987] __split_vma+0x170/0x950 [ 31.096474] split_vma+0xc6/0x110 [ 31.096929] mprotect_fixup+0x8d2/0xb30 [ 31.097474] do_mprotect_pkey+0x87e/0xd40 [ 31.098024] __x64_sys_mprotect+0x78/0xc0 [ 31.098574] do_syscall_64+0x3f/0x90 [ 31.099071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099745] [ 31.099967] Freed by task 211: [ 31.100376] kasan_save_stack+0x22/0x50 [ 31.100902] kasan_set_track+0x25/0x30 [ 31.101463] kasan_save_free_info+0x2b/0x50 [ 31.102032] __kasan_slab_free+0x10a/0x190 [ 31.102599] kmem_cache_free+0x10d/0x4d0 [ 31.103129] rcu_core+0x8c8/0x2860 [ 31.103599] __do_softirq+0x1b7/0x7d4 [ 31.104084] [ 31.104305] Last potentially related work creation: [ 31.104941] kasan_save_stack+0x22/0x50 [ 31.105494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.106104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.106799] remove_vma+0x139/0x170 [ 31.107268] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.107868] do_vmi_munmap+0x1f1/0x2b0 [ 31.108361] __vm_munmap+0x138/0x3a0 [ 31.108838] __x64_sys_munmap+0x59/0x80 [ 31.109358] do_syscall_64+0x3f/0x90 [ 31.109858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.110542] [ 31.110765] The buggy address belongs to the object at ffff88801b927740 [ 31.110765] which belongs to the cache vm_area_struct of size 168 [ 31.112349] The buggy address is located 88 bytes inside of [ 31.112349] freed 168-byte region [ffff88801b927740, ffff88801b9277e8) [ 31.113854] [ 31.114075] The buggy address belongs to the physical page: [ 31.114779] page:0000000043550ce7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b927 [ 31.115949] memcg:ffff88801b866e01 [ 31.116391] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.117074] page_type: 0xffffffff() [ 31.117579] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.118542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b866e01 [ 31.119505] page dumped because: kasan: bad access detected [ 31.120235] [ 31.120464] Memory state around the buggy address: [ 31.121068] ffff88801b927680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.122019] ffff88801b927700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.122931] >ffff88801b927780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.123845] ^ [ 31.124372] ffff88801b927800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.125305] ffff88801b927880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.126224] ================================================================== [ 31.127351] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.057030] BUG: Bad rss-counter state mm:0000000086729cbd type:MM_FILEPAGES val:33 [ 33.058608] BUG: Bad rss-counter state mm:0000000086729cbd type:MM_ANONPAGES val:22 [ 33.628848] BUG: Bad rss-counter state mm:0000000082eabca3 type:MM_FILEPAGES val:33 [ 33.630047] BUG: Bad rss-counter state mm:0000000082eabca3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62162' (ECDSA) to the list of known hosts. 2023/06/20 05:51:24 fuzzer started 2023/06/20 05:51:25 dialing manager at localhost:44161 2023/06/20 05:51:25 checking machine... 2023/06/20 05:51:25 checking revisions... [ 34.301088] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:51:25 testing simple program... [ 34.360668] cgroup: Unknown subsys name 'net' [ 34.398943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800c1c9938 RCX=ffffffff818d53b3 RDX=ffff888014700000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000006 RSP=ffff8880146ff5c8 R8 =0000000000000005 R9 =0000000000000007 R10=0000000000000006 R11=0000000000000001 R12=6100000000000000 R13=6100676f6c737973 R14=dffffc0000000000 R15=ffff88800c1c9968 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f87cd769900 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=00007f87ccc88000 CR3=000000000f736000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a3f57c7e7236499100000000000ae988 XMM05=9b0915b0c0fce9c20000000000133e80 XMM06=806171799158d9670000000000132900 XMM07=fb795ef6d657705600000000001228a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf8023 RBX=ffffffff85fc011c RCX=ffffffff8386dfa9 RDX=0000000000000000 RSI=ffffffff863dc7b8 RDI=ffffffff85fc011c RBP=ffffffff85fc011c RSP=ffff8880180bf020 R8 =ffffffff863dc7b8 R9 =ffff8880180bf118 R10=0000000000038001 R11=0000000000091b52 R12=ffffffff85fc011c R13=ffffffff85fc011c R14=ffffffff85fc011c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f1e39072900 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=00007fff29ebf000 CR3=000000000e6d6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000