[ 24.062661] BUG: Bad rss-counter state mm:000000007707c7ce type:MM_FILEPAGES val:33 [ 24.064504] BUG: Bad rss-counter state mm:000000007707c7ce type:MM_ANONPAGES val:22 [ 24.232131] ================================================================== [ 24.233099] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.234041] Read of size 8 at addr ffff88800ef773f8 by task sshd/221 [ 24.234942] [ 24.235167] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.236046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.237053] Call Trace: [ 24.237375] [ 24.237657] dump_stack_lvl+0x91/0xf0 [ 24.238157] print_report+0xcc/0x620 [ 24.238640] ? __virt_addr_valid+0x102/0x340 [ 24.239198] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.239816] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.240450] kasan_report+0xbe/0xf0 [ 24.240930] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.241559] vma_interval_tree_remove+0xc75/0xec0 [ 24.242164] vma_prepare+0xc54/0x11a0 [ 24.242641] __split_vma+0x5af/0x950 [ 24.243111] ? __pfx___split_vma+0x10/0x10 [ 24.243636] ? find_held_lock+0x2c/0x110 [ 24.244197] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.244760] ? lock_is_held_type+0x9f/0x120 [ 24.245303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.245903] ? mtree_range_walk+0x632/0x900 [ 24.246462] ? mas_walk+0x5c7/0x7c0 [ 24.246933] do_vmi_munmap+0x1f1/0x2b0 [ 24.247423] mmap_region+0x1f9/0x2660 [ 24.247901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.248424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.249135] ? __pfx_lock_acquire+0x10/0x10 [ 24.249669] ? __pfx_mmap_region+0x10/0x10 [ 24.250199] ? security_mmap_addr+0x7d/0xa0 [ 24.250728] ? get_unmapped_area+0x1f5/0x3f0 [ 24.251281] do_mmap+0x854/0xf00 [ 24.251721] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.252230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.252786] ksys_mmap_pgoff+0x3af/0x500 [ 24.253291] do_syscall_64+0x3f/0x90 [ 24.253780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.254428] RIP: 0033:0x7f7422072d82 [ 24.254886] 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 [ 24.257020] RSP: 002b:00007fffa8ad0dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.257953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7422072d82 [ 24.258828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74214ac000 [ 24.259719] RBP: 00007f74214ac000 R08: 0000000000000009 R09: 0000000000001000 [ 24.260622] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e479f9aec0 [ 24.261506] R13: 00007fffa8ad0de0 R14: 00007fffa8ad0e10 R15: 00007fffa8ad1170 [ 24.262408] [ 24.262713] [ 24.262936] Allocated by task 214: [ 24.263384] kasan_save_stack+0x22/0x50 [ 24.263911] kasan_set_track+0x25/0x30 [ 24.264438] __kasan_slab_alloc+0x59/0x70 [ 24.264983] kmem_cache_alloc+0x16b/0x370 [ 24.265525] vm_area_dup+0x20/0x160 [ 24.265998] __split_vma+0x170/0x950 [ 24.266488] split_vma+0xc6/0x110 [ 24.266946] mprotect_fixup+0x8d2/0xb30 [ 24.267478] do_mprotect_pkey+0x87e/0xd40 [ 24.268032] __x64_sys_mprotect+0x78/0xc0 [ 24.268581] do_syscall_64+0x3f/0x90 [ 24.269080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269754] [ 24.269978] Freed by task 214: [ 24.270392] kasan_save_stack+0x22/0x50 [ 24.270920] kasan_set_track+0x25/0x30 [ 24.271439] kasan_save_free_info+0x2b/0x50 [ 24.272018] __kasan_slab_free+0x10a/0x190 [ 24.272576] kmem_cache_free+0x10d/0x4d0 [ 24.273105] rcu_core+0x8c8/0x2860 [ 24.273580] __do_softirq+0x1b7/0x7d4 [ 24.274077] [ 24.274301] Last potentially related work creation: [ 24.274918] kasan_save_stack+0x22/0x50 [ 24.275454] __kasan_record_aux_stack+0x8e/0xa0 [ 24.276131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.276805] remove_vma+0x139/0x170 [ 24.277282] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.277861] do_vmi_munmap+0x1f1/0x2b0 [ 24.278366] __vm_munmap+0x138/0x3a0 [ 24.278849] __x64_sys_munmap+0x59/0x80 [ 24.279366] do_syscall_64+0x3f/0x90 [ 24.279865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.280556] [ 24.280783] The buggy address belongs to the object at ffff88800ef773a0 [ 24.280783] which belongs to the cache vm_area_struct of size 168 [ 24.282332] The buggy address is located 88 bytes inside of [ 24.282332] freed 168-byte region [ffff88800ef773a0, ffff88800ef77448) [ 24.283808] [ 24.284051] The buggy address belongs to the physical page: [ 24.284737] page:00000000a2965e1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef77 [ 24.285869] memcg:ffff88800bf24c01 [ 24.286318] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.287011] page_type: 0xffffffff() [ 24.287485] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.288468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf24c01 [ 24.289434] page dumped because: kasan: bad access detected [ 24.290136] [ 24.290358] Memory state around the buggy address: [ 24.290967] ffff88800ef77280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.291880] ffff88800ef77300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.292802] >ffff88800ef77380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.293694] ^ [ 24.294583] ffff88800ef77400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.295476] ffff88800ef77480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.296355] ================================================================== [ 24.297331] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.448422] BUG: Bad rss-counter state mm:00000000e9d0f16c type:MM_FILEPAGES val:33 [ 26.449407] BUG: Bad rss-counter state mm:00000000e9d0f16c type:MM_ANONPAGES val:22 [ 26.977543] BUG: Bad rss-counter state mm:000000009dc41fda type:MM_FILEPAGES val:33 [ 26.979112] BUG: Bad rss-counter state mm:000000009dc41fda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35808' (ECDSA) to the list of known hosts. 2023/06/20 18:10:44 fuzzer started 2023/06/20 18:10:44 dialing manager at localhost:36067 2023/06/20 18:10:44 checking machine... 2023/06/20 18:10:44 checking revisions... [ 27.670016] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:10:45 testing simple program... [ 27.714130] cgroup: Unknown subsys name 'net' [ 27.750997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000008 RCX=000000000f02000a RDX=0000000000000004 RSI=ffff8880168f7420 RDI=ffff888017f92068 RBP=ffff888019de2a00 RSP=ffff8880168f7390 R8 =000000000f02000a R9 =0000000000000004 R10=ffff888017f9206c R11=0000065700000657 R12=0000000000000000 R13=0000000000000001 R14=ffff8880168f7420 R15=0000000000000e5c RIP=ffffffff814c086b 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 00007ff8be5b6900 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=00007ff8beb6d618 CR3=0000000017fa6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fce49e6a940 CR3=0000000008ec0000 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=aab5e224fc4443aff840fbc133a7331c XMM02=ec2efd57dc4c00df0000000000119f60 XMM03=d4de9bbed91ea8af000000000011a030 XMM04=7ccafec7f015977a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000130d80 XMM06=c291bd5c70af25b90000000000130c08 XMM07=e042d86d42eb936e0000000000121478 XMM08=d4de9bbed91ea8af000000000011a030 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000