[ 30.238317] BUG: Bad rss-counter state mm:00000000ee232ba1 type:MM_FILEPAGES val:33 [ 30.239266] BUG: Bad rss-counter state mm:00000000ee232ba1 type:MM_ANONPAGES val:22 [ 30.276151] ================================================================== [ 30.277124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.278201] Read of size 8 at addr ffff888016f0da50 by task sshd/220 [ 30.279119] [ 30.279433] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.280440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.281626] Call Trace: [ 30.281990] [ 30.282341] dump_stack_lvl+0x91/0xf0 [ 30.282927] print_report+0xcc/0x620 [ 30.283470] ? __virt_addr_valid+0x102/0x340 [ 30.284067] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.284799] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.285564] kasan_report+0xbe/0xf0 [ 30.286076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286715] vma_interval_tree_remove+0xc75/0xec0 [ 30.287324] vma_prepare+0xc54/0x11a0 [ 30.287814] __split_vma+0x5af/0x950 [ 30.288293] ? __pfx___split_vma+0x10/0x10 [ 30.288836] ? find_held_lock+0x2c/0x110 [ 30.289379] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.289981] ? lock_is_held_type+0x9f/0x120 [ 30.290534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.291155] ? mtree_range_walk+0x632/0x900 [ 30.291721] ? mas_walk+0x5c7/0x7c0 [ 30.292199] do_vmi_munmap+0x1f1/0x2b0 [ 30.292706] mmap_region+0x1f9/0x2660 [ 30.293198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.293716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.294460] ? __pfx_lock_acquire+0x10/0x10 [ 30.294996] ? __pfx_mmap_region+0x10/0x10 [ 30.295536] ? security_mmap_addr+0x7d/0xa0 [ 30.296069] ? get_unmapped_area+0x1f5/0x3f0 [ 30.296622] do_mmap+0x854/0xf00 [ 30.297062] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.297556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.298139] ksys_mmap_pgoff+0x3af/0x500 [ 30.298651] do_syscall_64+0x3f/0x90 [ 30.299127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.299781] RIP: 0033:0x7f814a61ed82 [ 30.300236] 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 [ 30.302349] RSP: 002b:00007ffca840a1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.303254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f814a61ed82 [ 30.304092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8149a58000 [ 30.304928] RBP: 00007f8149a58000 R08: 0000000000000009 R09: 0000000000001000 [ 30.305771] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616903aff70 [ 30.306640] R13: 00007ffca840a200 R14: 00007ffca840a230 R15: 00007ffca840a590 [ 30.307494] [ 30.307788] [ 30.308003] Allocated by task 213: [ 30.308431] kasan_save_stack+0x22/0x50 [ 30.308933] kasan_set_track+0x25/0x30 [ 30.309420] __kasan_slab_alloc+0x59/0x70 [ 30.309950] kmem_cache_alloc+0x16b/0x370 [ 30.310463] vm_area_dup+0x20/0x160 [ 30.310919] __split_vma+0x170/0x950 [ 30.311388] split_vma+0xc6/0x110 [ 30.311823] mprotect_fixup+0x8d2/0xb30 [ 30.312328] do_mprotect_pkey+0x87e/0xd40 [ 30.312848] __x64_sys_mprotect+0x78/0xc0 [ 30.313380] do_syscall_64+0x3f/0x90 [ 30.313850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.314523] [ 30.314739] Freed by task 213: [ 30.315129] kasan_save_stack+0x22/0x50 [ 30.315630] kasan_set_track+0x25/0x30 [ 30.316128] kasan_save_free_info+0x2b/0x50 [ 30.316665] __kasan_slab_free+0x10a/0x190 [ 30.317203] kmem_cache_free+0x10d/0x4d0 [ 30.317705] rcu_core+0x8c8/0x2860 [ 30.318148] __do_softirq+0x1b7/0x7d4 [ 30.318622] [ 30.318837] Last potentially related work creation: [ 30.319416] kasan_save_stack+0x22/0x50 [ 30.319914] __kasan_record_aux_stack+0x8e/0xa0 [ 30.320479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.321122] remove_vma+0x139/0x170 [ 30.321614] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.322190] do_vmi_munmap+0x1f1/0x2b0 [ 30.322674] __vm_munmap+0x138/0x3a0 [ 30.323138] __x64_sys_munmap+0x59/0x80 [ 30.323629] do_syscall_64+0x3f/0x90 [ 30.324103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.324745] [ 30.324957] The buggy address belongs to the object at ffff888016f0d9f8 [ 30.324957] which belongs to the cache vm_area_struct of size 168 [ 30.326413] The buggy address is located 88 bytes inside of [ 30.326413] freed 168-byte region [ffff888016f0d9f8, ffff888016f0daa0) [ 30.327813] [ 30.328034] The buggy address belongs to the physical page: [ 30.328691] page:000000000050f4df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f0d [ 30.329771] memcg:ffff88800d3f0e01 [ 30.330208] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.330907] page_type: 0xffffffff() [ 30.331363] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.332272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3f0e01 [ 30.333181] page dumped because: kasan: bad access detected [ 30.333835] [ 30.334064] Memory state around the buggy address: [ 30.334642] ffff888016f0d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.335483] ffff888016f0d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.336334] >ffff888016f0da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.337181] ^ [ 30.337931] ffff888016f0da80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.338810] ffff888016f0db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.339700] ================================================================== [ 30.340682] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.240133] BUG: Bad rss-counter state mm:000000009b9a50d2 type:MM_FILEPAGES val:33 [ 32.241372] BUG: Bad rss-counter state mm:000000009b9a50d2 type:MM_ANONPAGES val:22 [ 32.800777] BUG: Bad rss-counter state mm:0000000019514e86 type:MM_FILEPAGES val:33 [ 32.801969] BUG: Bad rss-counter state mm:0000000019514e86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61041' (ECDSA) to the list of known hosts. 2023/06/20 21:45:17 fuzzer started 2023/06/20 21:45:17 dialing manager at localhost:36067 2023/06/20 21:45:18 checking machine... 2023/06/20 21:45:18 checking revisions... [ 33.502581] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:45:18 testing simple program... [ 33.554050] cgroup: Unknown subsys name 'net' [ 33.600403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:45:17 Registers: info registers vcpu 0 RAX=0000607f92e0e5e0 RBX=ffff8880142c6000 RCX=0000000000000000 RDX=ffffffff81826080 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=dffffc0000000000 RSP=ffff8880094afc68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800ec33a00 R13=ffff888019211d80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff818260c8 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 00007f7c0cc56900 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=00007f7c0d20b650 CR3=0000000018fca000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f03b0c093a8 CR3=000000000c650000 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=0922a0b2b366da8fe141a23d8dc82571 XMM02=000000000011af28eff9b2d0a8fce9cb XMM03=000000000011aff82c67c8bc2e329bc3 XMM04=9e7dbf49bbea4f9f00000000000ae988 XMM05=19e9129bd510f2350000000000131578 XMM06=4fda316b135da52b0000000000131400 XMM07=e042d86d42eb936e0000000000121c30 XMM08=0b4bda4766aebf69000000000011aff8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000