[ 30.279419] BUG: Bad rss-counter state mm:00000000a6938a4e type:MM_FILEPAGES val:33 [ 30.280065] BUG: Bad rss-counter state mm:00000000a6938a4e type:MM_ANONPAGES val:22 [ 30.443957] ================================================================== [ 30.444752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.445467] Read of size 8 at addr ffff88800d785058 by task sshd/222 [ 30.445966] [ 30.446107] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.446655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.447270] Call Trace: [ 30.447471] <TASK> [ 30.447650] dump_stack_lvl+0x91/0xf0 [ 30.447964] print_report+0xcc/0x620 [ 30.448276] ? __virt_addr_valid+0x102/0x340 [ 30.448638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.449035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.449423] kasan_report+0xbe/0xf0 [ 30.449726] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450765] vma_interval_tree_remove+0xc75/0xec0 [ 30.451157] vma_prepare+0xc54/0x11a0 [ 30.451513] __split_vma+0x5af/0x950 [ 30.451899] ? __pfx___split_vma+0x10/0x10 [ 30.452370] ? find_held_lock+0x2c/0x110 [ 30.452810] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.453287] ? lock_is_held_type+0x9f/0x120 [ 30.453659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.454687] ? mtree_range_walk+0x632/0x900 [ 30.455042] ? mas_walk+0x5c7/0x7c0 [ 30.455396] do_vmi_munmap+0x1f1/0x2b0 [ 30.455806] mmap_region+0x1f9/0x2660 [ 30.456260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.456687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.457381] ? __pfx_lock_acquire+0x10/0x10 [ 30.457734] ? __pfx_mmap_region+0x10/0x10 [ 30.458113] ? security_mmap_addr+0x7d/0xa0 [ 30.458505] ? get_unmapped_area+0x1f5/0x3f0 [ 30.458858] do_mmap+0x854/0xf00 [ 30.459137] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.459514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.459865] ksys_mmap_pgoff+0x3af/0x500 [ 30.460193] do_syscall_64+0x3f/0x90 [ 30.460554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.460972] RIP: 0033:0x7f70cb627d82 [ 30.461320] 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 [ 30.462857] RSP: 002b:00007fffe21383d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.463476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70cb627d82 [ 30.464013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70caa61000 [ 30.464608] RBP: 00007f70caa61000 R08: 0000000000000009 R09: 0000000000001000 [ 30.465146] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615aeeedec0 [ 30.465733] R13: 00007fffe21383f0 R14: 00007fffe2138420 R15: 00007fffe2138780 [ 30.466422] </TASK> [ 30.466615] [ 30.466752] Allocated by task 213: [ 30.467023] kasan_save_stack+0x22/0x50 [ 30.467406] kasan_set_track+0x25/0x30 [ 30.467723] __kasan_slab_alloc+0x59/0x70 [ 30.468058] kmem_cache_alloc+0x16b/0x370 [ 30.468446] vm_area_dup+0x20/0x160 [ 30.468740] __split_vma+0x170/0x950 [ 30.469038] split_vma+0xc6/0x110 [ 30.469371] mprotect_fixup+0x8d2/0xb30 [ 30.469694] do_mprotect_pkey+0x87e/0xd40 [ 30.470051] __x64_sys_mprotect+0x78/0xc0 [ 30.470525] do_syscall_64+0x3f/0x90 [ 30.470935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.471470] [ 30.471606] Freed by task 213: [ 30.471857] kasan_save_stack+0x22/0x50 [ 30.472202] kasan_set_track+0x25/0x30 [ 30.472654] kasan_save_free_info+0x2b/0x50 [ 30.473072] __kasan_slab_free+0x10a/0x190 [ 30.473576] kmem_cache_free+0x10d/0x4d0 [ 30.473986] rcu_core+0x8c8/0x2860 [ 30.474326] __do_softirq+0x1b7/0x7d4 [ 30.474660] [ 30.474845] Last potentially related work creation: [ 30.475370] kasan_save_stack+0x22/0x50 [ 30.475841] __kasan_record_aux_stack+0x8e/0xa0 [ 30.476326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.476773] remove_vma+0x139/0x170 [ 30.477117] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.477686] do_vmi_munmap+0x1f1/0x2b0 [ 30.478107] __vm_munmap+0x138/0x3a0 [ 30.478453] __x64_sys_munmap+0x59/0x80 [ 30.478775] do_syscall_64+0x3f/0x90 [ 30.479082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.479688] [ 30.479841] Second to last potentially related work creation: [ 30.480852] kasan_save_stack+0x22/0x50 [ 30.481179] __kasan_record_aux_stack+0x8e/0xa0 [ 30.481604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.482053] remove_vma+0x139/0x170 [ 30.482406] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.482762] do_vmi_munmap+0x1f1/0x2b0 [ 30.483075] mmap_region+0x1f9/0x2660 [ 30.483435] do_mmap+0x854/0xf00 [ 30.483711] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.484029] ksys_mmap_pgoff+0x3af/0x500 [ 30.484411] do_syscall_64+0x3f/0x90 [ 30.484718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485125] [ 30.485321] The buggy address belongs to the object at ffff88800d785000 [ 30.485321] which belongs to the cache vm_area_struct of size 168 [ 30.486424] The buggy address is located 88 bytes inside of [ 30.486424] freed 168-byte region [ffff88800d785000, ffff88800d7850a8) [ 30.487369] [ 30.487557] The buggy address belongs to the physical page: [ 30.488054] page:000000003ab164bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd785 [ 30.488985] memcg:ffff888010231201 [ 30.489379] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.489792] page_type: 0xffffffff() [ 30.490138] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.490925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010231201 [ 30.491718] page dumped because: kasan: bad access detected [ 30.492137] [ 30.492347] Memory state around the buggy address: [ 30.492838] ffff88800d784f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.493556] ffff88800d784f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.494186] >ffff88800d785000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.494880] ^ [ 30.495571] ffff88800d785080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.496196] ffff88800d785100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.496805] ================================================================== [ 30.501319] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.129796] BUG: Bad rss-counter state mm:00000000099109eb type:MM_FILEPAGES val:33 [ 35.130589] BUG: Bad rss-counter state mm:00000000099109eb type:MM_ANONPAGES val:22 [ 35.631511] BUG: Bad rss-counter state mm:000000005acb77dc type:MM_FILEPAGES val:33 [ 35.632096] BUG: Bad rss-counter state mm:000000005acb77dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45735' (ECDSA) to the list of known hosts. 2023/06/21 10:19:45 fuzzer started 2023/06/21 10:19:45 dialing manager at localhost:36067 2023/06/21 10:19:45 checking machine... 2023/06/21 10:19:45 checking revisions... [ 36.594078] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:19:45 testing simple program... [ 36.640606] cgroup: Unknown subsys name 'net' [ 36.688059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11001978f04 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800cbc7810 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1fc0 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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 00007f7a5a043900 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=00007efd44f96328 CR3=000000000f178000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=00007f9eb161f794 CR3=000000000f002000 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=6f732e7061727762696c2f756e672d78 XMM02=00302e6f732e7061727762696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000