syzkaller login: [ 31.876026] BUG: Bad rss-counter state mm:00000000bb36273b type:MM_FILEPAGES val:33 [ 31.877402] BUG: Bad rss-counter state mm:00000000bb36273b type:MM_ANONPAGES val:22 [ 32.039685] ================================================================== [ 32.040571] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.041524] Read of size 8 at addr ffff8880146d53f8 by task sshd/219 [ 32.042270] [ 32.042592] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.043469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.044511] Call Trace: [ 32.044883] [ 32.045156] dump_stack_lvl+0x91/0xf0 [ 32.045619] print_report+0xcc/0x620 [ 32.046074] ? __virt_addr_valid+0x102/0x340 [ 32.046596] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.047177] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.047766] kasan_report+0xbe/0xf0 [ 32.048217] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.048831] vma_interval_tree_remove+0xc75/0xec0 [ 32.049421] vma_prepare+0xc54/0x11a0 [ 32.049890] __split_vma+0x5af/0x950 [ 32.050355] ? __pfx___split_vma+0x10/0x10 [ 32.050874] ? find_held_lock+0x2c/0x110 [ 32.051375] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.051946] ? lock_is_held_type+0x9f/0x120 [ 32.052472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.053070] ? mtree_range_walk+0x632/0x900 [ 32.053605] ? mas_walk+0x5c7/0x7c0 [ 32.054075] do_vmi_munmap+0x1f1/0x2b0 [ 32.054552] mmap_region+0x1f9/0x2660 [ 32.055028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.055531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.056247] ? __pfx_lock_acquire+0x10/0x10 [ 32.056764] ? __pfx_mmap_region+0x10/0x10 [ 32.057283] ? security_mmap_addr+0x7d/0xa0 [ 32.057807] ? get_unmapped_area+0x1f5/0x3f0 [ 32.058355] do_mmap+0x854/0xf00 [ 32.058786] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.059280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.059919] ksys_mmap_pgoff+0x3af/0x500 [ 32.060435] do_syscall_64+0x3f/0x90 [ 32.060929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.061569] RIP: 0033:0x7f1ab310fd82 [ 32.062038] 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 [ 32.064224] RSP: 002b:00007ffe57874808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.065139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ab310fd82 [ 32.065990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ab2549000 [ 32.066842] RBP: 00007f1ab2549000 R08: 0000000000000009 R09: 0000000000001000 [ 32.067706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aec05e3b20 [ 32.068562] R13: 00007ffe57874820 R14: 00007ffe57874850 R15: 00007ffe57874bb0 [ 32.069424] [ 32.069734] [ 32.069956] Allocated by task 212: [ 32.070386] kasan_save_stack+0x22/0x50 [ 32.070900] kasan_set_track+0x25/0x30 [ 32.071390] __kasan_slab_alloc+0x59/0x70 [ 32.071966] kmem_cache_alloc+0x16b/0x370 [ 32.072482] vm_area_dup+0x20/0x160 [ 32.072967] __split_vma+0x170/0x950 [ 32.073440] split_vma+0xc6/0x110 [ 32.073894] mprotect_fixup+0x8d2/0xb30 [ 32.074390] do_mprotect_pkey+0x87e/0xd40 [ 32.074927] __x64_sys_mprotect+0x78/0xc0 [ 32.075449] do_syscall_64+0x3f/0x90 [ 32.075956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.076603] [ 32.076830] Freed by task 212: [ 32.077228] kasan_save_stack+0x22/0x50 [ 32.077755] kasan_set_track+0x25/0x30 [ 32.078246] kasan_save_free_info+0x2b/0x50 [ 32.078788] __kasan_slab_free+0x10a/0x190 [ 32.079321] kmem_cache_free+0x10d/0x4d0 [ 32.079880] rcu_core+0x8c8/0x2860 [ 32.080336] __do_softirq+0x1b7/0x7d4 [ 32.080831] [ 32.081045] Last potentially related work creation: [ 32.081642] kasan_save_stack+0x22/0x50 [ 32.082146] __kasan_record_aux_stack+0x8e/0xa0 [ 32.082732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.083372] remove_vma+0x139/0x170 [ 32.083868] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.084420] do_vmi_munmap+0x1f1/0x2b0 [ 32.084918] __vm_munmap+0x138/0x3a0 [ 32.085378] __x64_sys_munmap+0x59/0x80 [ 32.085886] do_syscall_64+0x3f/0x90 [ 32.086352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.087011] [ 32.087224] The buggy address belongs to the object at ffff8880146d53a0 [ 32.087224] which belongs to the cache vm_area_struct of size 168 [ 32.088843] The buggy address is located 88 bytes inside of [ 32.088843] freed 168-byte region [ffff8880146d53a0, ffff8880146d5448) [ 32.090306] [ 32.090552] The buggy address belongs to the physical page: [ 32.091240] page:0000000057511937 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146d5 [ 32.092416] memcg:ffff8880167eb901 [ 32.092899] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.093562] page_type: 0xffffffff() [ 32.093999] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.094942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167eb901 [ 32.095884] page dumped because: kasan: bad access detected [ 32.096544] [ 32.096757] Memory state around the buggy address: [ 32.097329] ffff8880146d5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.098197] ffff8880146d5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.099067] >ffff8880146d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.099967] ^ [ 32.100816] ffff8880146d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.101671] ffff8880146d5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.102537] ================================================================== [ 32.103622] Disabling lock debugging due to kernel taint [ 34.442981] BUG: Bad rss-counter state mm:00000000efa8324e type:MM_FILEPAGES val:33 [ 34.443552] BUG: Bad rss-counter state mm:00000000efa8324e type:MM_ANONPAGES val:22 [ 34.872317] BUG: Bad rss-counter state mm:00000000f41ea901 type:MM_FILEPAGES val:33 [ 34.873107] BUG: Bad rss-counter state mm:00000000f41ea901 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40152' (ECDSA) to the list of known hosts. 2023/06/19 21:23:21 fuzzer started 2023/06/19 21:23:22 dialing manager at localhost:44161 2023/06/19 21:23:22 checking machine... 2023/06/19 21:23:22 checking revisions... [ 35.613061] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:23:22 testing simple program... [ 35.658159] cgroup: Unknown subsys name 'net' [ 35.704793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=1ffff1100d9c135e RSI=ffffffff86605973 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c9a02e0 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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=00007f6f31a158b0 CR3=000000000c656000 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=2031323a33323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001b16fac RCX=0000000000000000 RDX=ffff888018e551c0 RSI=ffffffff81718053 RDI=0000000000000007 RBP=ffff88801bc3b468 RSP=ffff88800d8b7d38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000016578007 R11=0000000000000000 R12=00007fa344bac3ec R13=ffffffff852c41f8 R14=ffff888018cdd340 R15=0000000016578067 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa34443a900 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=00007fa344bac3ec CR3=000000000f2e4000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000