[ 30.025659] BUG: Bad rss-counter state mm:00000000eb55192e type:MM_FILEPAGES val:33 [ 30.026929] BUG: Bad rss-counter state mm:00000000eb55192e type:MM_ANONPAGES val:22 [ 30.066127] ================================================================== [ 30.067205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.068333] Read of size 8 at addr ffff888017f57ed8 by task sshd/218 [ 30.069369] [ 30.069626] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.070650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.071818] Call Trace: [ 30.072197] [ 30.072534] dump_stack_lvl+0x91/0xf0 [ 30.073122] print_report+0xcc/0x620 [ 30.073700] ? __virt_addr_valid+0x102/0x340 [ 30.074355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.075094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.075842] kasan_report+0xbe/0xf0 [ 30.076332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.076963] vma_interval_tree_remove+0xc75/0xec0 [ 30.077572] vma_prepare+0xc54/0x11a0 [ 30.078051] __split_vma+0x5af/0x950 [ 30.078526] ? __pfx___split_vma+0x10/0x10 [ 30.079062] ? find_held_lock+0x2c/0x110 [ 30.079602] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.080171] ? lock_is_held_type+0x9f/0x120 [ 30.080713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.081334] ? mtree_range_walk+0x632/0x900 [ 30.081889] ? mas_walk+0x5c7/0x7c0 [ 30.082369] do_vmi_munmap+0x1f1/0x2b0 [ 30.082869] mmap_region+0x1f9/0x2660 [ 30.083358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.083878] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.084597] ? __pfx_lock_acquire+0x10/0x10 [ 30.085136] ? __pfx_mmap_region+0x10/0x10 [ 30.085675] ? security_mmap_addr+0x7d/0xa0 [ 30.086247] ? get_unmapped_area+0x1f5/0x3f0 [ 30.086797] do_mmap+0x854/0xf00 [ 30.087241] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.087757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.088330] ksys_mmap_pgoff+0x3af/0x500 [ 30.088848] do_syscall_64+0x3f/0x90 [ 30.089335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.090016] RIP: 0033:0x7f5aa377fd82 [ 30.090583] 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 [ 30.092704] RSP: 002b:00007ffe719bf0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.093595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5aa377fd82 [ 30.094421] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5aa2bb9000 [ 30.095259] RBP: 00007f5aa2bb9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.096114] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f642157f60 [ 30.096940] R13: 00007ffe719bf0f0 R14: 00007ffe719bf120 R15: 00007ffe719bf480 [ 30.097772] [ 30.098063] [ 30.098275] Allocated by task 211: [ 30.098691] kasan_save_stack+0x22/0x50 [ 30.099191] kasan_set_track+0x25/0x30 [ 30.099690] __kasan_slab_alloc+0x59/0x70 [ 30.100207] kmem_cache_alloc+0x16b/0x370 [ 30.100705] vm_area_dup+0x20/0x160 [ 30.101149] __split_vma+0x170/0x950 [ 30.101605] split_vma+0xc6/0x110 [ 30.102034] mprotect_fixup+0x8d2/0xb30 [ 30.102523] do_mprotect_pkey+0x87e/0xd40 [ 30.103040] __x64_sys_mprotect+0x78/0xc0 [ 30.103558] do_syscall_64+0x3f/0x90 [ 30.104021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.104645] [ 30.104858] Freed by task 211: [ 30.105272] kasan_save_stack+0x22/0x50 [ 30.105769] kasan_set_track+0x25/0x30 [ 30.106261] kasan_save_free_info+0x2b/0x50 [ 30.106783] __kasan_slab_free+0x10a/0x190 [ 30.107330] kmem_cache_free+0x10d/0x4d0 [ 30.108048] rcu_core+0x8c8/0x2860 [ 30.108586] __do_softirq+0x1b7/0x7d4 [ 30.109170] [ 30.109425] Last potentially related work creation: [ 30.110144] kasan_save_stack+0x22/0x50 [ 30.110694] __kasan_record_aux_stack+0x8e/0xa0 [ 30.111258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.111901] remove_vma+0x139/0x170 [ 30.112346] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.112920] do_vmi_munmap+0x1f1/0x2b0 [ 30.113401] __vm_munmap+0x138/0x3a0 [ 30.113863] __x64_sys_munmap+0x59/0x80 [ 30.114361] do_syscall_64+0x3f/0x90 [ 30.114824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.115500] [ 30.115714] The buggy address belongs to the object at ffff888017f57e80 [ 30.115714] which belongs to the cache vm_area_struct of size 168 [ 30.117162] The buggy address is located 88 bytes inside of [ 30.117162] freed 168-byte region [ffff888017f57e80, ffff888017f57f28) [ 30.118614] [ 30.118880] The buggy address belongs to the physical page: [ 30.119704] page:00000000bff09ddb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f57 [ 30.121043] memcg:ffff888017f55101 [ 30.121541] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.122181] page_type: 0xffffffff() [ 30.122626] raw: 0100000000000200 ffff88800879fc80 ffffea0000357f40 dead000000000002 [ 30.123563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f55101 [ 30.124462] page dumped because: kasan: bad access detected [ 30.125114] [ 30.125327] Memory state around the buggy address: [ 30.125897] ffff888017f57d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.126749] ffff888017f57e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.127617] >ffff888017f57e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.128467] ^ [ 30.129193] ffff888017f57f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.130035] ffff888017f57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.130842] ================================================================== [ 30.131795] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.883736] BUG: Bad rss-counter state mm:0000000020f861ab type:MM_FILEPAGES val:33 [ 31.884434] BUG: Bad rss-counter state mm:0000000020f861ab type:MM_ANONPAGES val:22 [ 32.286921] BUG: Bad rss-counter state mm:00000000577859d8 type:MM_FILEPAGES val:33 [ 32.287612] BUG: Bad rss-counter state mm:00000000577859d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39648' (ECDSA) to the list of known hosts. 2023/06/19 13:19:35 fuzzer started 2023/06/19 13:19:36 dialing manager at localhost:44161 2023/06/19 13:19:36 checking machine... 2023/06/19 13:19:36 checking revisions... [ 33.031355] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:19:36 testing simple program... [ 33.081266] cgroup: Unknown subsys name 'net' [ 33.127450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f30c30792a0 CR3=000000000d6ea000 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=a545d894efe41caecb4a91fdc215d826 XMM02=0000000000120340eff9b2d0a8fce9cb XMM03=00000000001204102c67c8bc2e329bc3 XMM04=42a9bed9a08c4fc100000000000ae988 XMM05=751b9502027dc0b90000000000133890 XMM06=a85d358112d553150000000000132a68 XMM07=e042d86d42eb936e00000000001242c8 XMM08=bb962f931046f7000000000000120410 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff88806cf09e40 RDI=ffffffff818d9dc6 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88800ef1d1c0 R15=ffff888013d05780 RIP=ffffffff81130399 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 00007f3c404de900 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=00007ffe6bab4000 CR3=0000000019c32000 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