syzkaller login: [ 39.631631] BUG: Bad rss-counter state mm:000000001540845a type:MM_FILEPAGES val:33 [ 39.633527] BUG: Bad rss-counter state mm:000000001540845a type:MM_ANONPAGES val:22 [ 39.854520] ================================================================== [ 39.855126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.855737] Read of size 8 at addr ffff88800f5d2ed8 by task sshd/222 [ 39.856233] [ 39.856381] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.860925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.861558] Call Trace: [ 39.861770] [ 39.861959] dump_stack_lvl+0x91/0xf0 [ 39.862288] print_report+0xcc/0x620 [ 39.862611] ? __virt_addr_valid+0x102/0x340 [ 39.862975] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.863385] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.863792] kasan_report+0xbe/0xf0 [ 39.864111] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.864520] vma_interval_tree_remove+0xc75/0xec0 [ 39.864959] vma_prepare+0xc54/0x11a0 [ 39.865280] __split_vma+0x5af/0x950 [ 39.865596] ? __pfx___split_vma+0x10/0x10 [ 39.865924] ? find_held_lock+0x2c/0x110 [ 39.866259] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.866636] ? lock_is_held_type+0x9f/0x120 [ 39.866997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.867396] ? mtree_range_walk+0x632/0x900 [ 39.867763] ? mas_walk+0x5c7/0x7c0 [ 39.868086] do_vmi_munmap+0x1f1/0x2b0 [ 39.868418] mmap_region+0x1f9/0x2660 [ 39.868758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.869106] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.869578] ? __pfx_lock_acquire+0x10/0x10 [ 39.869935] ? __pfx_mmap_region+0x10/0x10 [ 39.870288] ? security_mmap_addr+0x7d/0xa0 [ 39.870644] ? get_unmapped_area+0x1f5/0x3f0 [ 39.871008] do_mmap+0x854/0xf00 [ 39.871304] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.871636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.872011] ksys_mmap_pgoff+0x3af/0x500 [ 39.872351] do_syscall_64+0x3f/0x90 [ 39.872649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.873070] RIP: 0033:0x7f845a860d82 [ 39.873358] 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 [ 39.874724] RSP: 002b:00007ffc37a4e998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.875313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f845a860d82 [ 39.875873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8459c9a000 [ 39.876433] RBP: 00007f8459c9a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.877009] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6cd561ec0 [ 39.877591] R13: 00007ffc37a4e9b0 R14: 00007ffc37a4e9e0 R15: 00007ffc37a4ed40 [ 39.878144] [ 39.878344] [ 39.878490] Allocated by task 213: [ 39.878777] kasan_save_stack+0x22/0x50 [ 39.879117] kasan_set_track+0x25/0x30 [ 39.879448] __kasan_slab_alloc+0x59/0x70 [ 39.879796] kmem_cache_alloc+0x16b/0x370 [ 39.880136] vm_area_dup+0x20/0x160 [ 39.880438] __split_vma+0x170/0x950 [ 39.880772] split_vma+0xc6/0x110 [ 39.881067] mprotect_fixup+0x8d2/0xb30 [ 39.881400] do_mprotect_pkey+0x87e/0xd40 [ 39.881745] __x64_sys_mprotect+0x78/0xc0 [ 39.882089] do_syscall_64+0x3f/0x90 [ 39.882408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.882834] [ 39.882980] Freed by task 213: [ 39.883243] kasan_save_stack+0x22/0x50 [ 39.883578] kasan_set_track+0x25/0x30 [ 39.883907] kasan_save_free_info+0x2b/0x50 [ 39.884259] __kasan_slab_free+0x10a/0x190 [ 39.884612] kmem_cache_free+0x10d/0x4d0 [ 39.884994] rcu_core+0x8c8/0x2860 [ 39.885290] __do_softirq+0x1b7/0x7d4 [ 39.885607] [ 39.885751] Last potentially related work creation: [ 39.886160] kasan_save_stack+0x22/0x50 [ 39.886491] __kasan_record_aux_stack+0x8e/0xa0 [ 39.886864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.887332] remove_vma+0x139/0x170 [ 39.887629] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.887996] do_vmi_munmap+0x1f1/0x2b0 [ 39.888317] __vm_munmap+0x138/0x3a0 [ 39.888625] __x64_sys_munmap+0x59/0x80 [ 39.888984] do_syscall_64+0x3f/0x90 [ 39.889298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.889720] [ 39.889863] The buggy address belongs to the object at ffff88800f5d2e80 [ 39.889863] which belongs to the cache vm_area_struct of size 168 [ 39.890808] The buggy address is located 88 bytes inside of [ 39.890808] freed 168-byte region [ffff88800f5d2e80, ffff88800f5d2f28) [ 39.891687] [ 39.891835] The buggy address belongs to the physical page: [ 39.892268] page:00000000eeff1259 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5d2 [ 39.892992] memcg:ffff888016a2d301 [ 39.893261] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.893677] page_type: 0xffffffff() [ 39.893976] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.894577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a2d301 [ 39.895172] page dumped because: kasan: bad access detected [ 39.895604] [ 39.895749] Memory state around the buggy address: [ 39.896136] ffff88800f5d2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.896718] ffff88800f5d2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.897277] >ffff88800f5d2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.897826] ^ [ 39.898297] ffff88800f5d2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.898854] ffff88800f5d2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.899405] ================================================================== [ 39.900483] Disabling lock debugging due to kernel taint [ 44.760869] BUG: Bad rss-counter state mm:00000000dcfdda1d type:MM_FILEPAGES val:33 [ 44.761565] BUG: Bad rss-counter state mm:00000000dcfdda1d type:MM_ANONPAGES val:22 [ 45.609208] BUG: Bad rss-counter state mm:00000000744e57fd type:MM_FILEPAGES val:33 [ 45.609799] BUG: Bad rss-counter state mm:00000000744e57fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14375' (ECDSA) to the list of known hosts. 2023/06/20 08:17:25 fuzzer started 2023/06/20 08:17:26 dialing manager at localhost:44161 2023/06/20 08:17:26 checking machine... 2023/06/20 08:17:26 checking revisions... [ 46.509690] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:17:26 testing simple program... [ 46.558552] cgroup: Unknown subsys name 'net' [ 46.662857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:17:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81764f99 RDX=ffff888016f01b40 RSI=0000000000000004 RDI=ffffea00002090b0 RBP=ffffea0000209080 RSP=ffff88800f557608 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffea0000209080 R13=ffff88800ecbed98 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8180fd58 RFL=00000293 [--S-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 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=00007f8cb0d8f790 CR3=000000000e342000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=975fbd6225288bae0000000000000000 XMM05=d0e2313ab80a5cb3fd14a0ca1e1b9e64 XMM06=2ceb8c502d5d72d420ffdba6b574122c XMM07=bedf339177a4f470d578844eae1277b8 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888006919720 RCX=0000000000000000 RDX=ffffffff87b86c40 RSI=ffffffff848ff060 RDI=ffff888006919740 RBP=ffff888006919738 RSP=ffff88800f557610 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000000 R14=ffff888006919768 R15=ffff888006919720 RIP=ffffffff812db252 RFL=00000292 [--S-A--] 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 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=00007f427957c260 CR3=000000000e342000 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=756e696c2d34365f3638782f62696c2f XMM01=732e747079726362696c2f756e672d78 XMM02=00312e6f732e747079726362696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000