syzkaller login: [ 42.491885] BUG: Bad rss-counter state mm:00000000eee16672 type:MM_FILEPAGES val:33 [ 42.493377] BUG: Bad rss-counter state mm:00000000eee16672 type:MM_ANONPAGES val:22 [ 42.652408] ================================================================== [ 42.653539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.654679] Read of size 8 at addr ffff888019384d08 by task sshd/227 [ 42.655743] [ 42.656005] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.657015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.658009] Call Trace: [ 42.658341] [ 42.658629] dump_stack_lvl+0x91/0xf0 [ 42.659124] print_report+0xcc/0x620 [ 42.659620] ? __virt_addr_valid+0x102/0x340 [ 42.660180] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.660833] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.661464] kasan_report+0xbe/0xf0 [ 42.661942] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.662571] vma_interval_tree_remove+0xc75/0xec0 [ 42.663198] vma_prepare+0xc54/0x11a0 [ 42.663694] __split_vma+0x5af/0x950 [ 42.664182] ? __pfx___split_vma+0x10/0x10 [ 42.664735] ? find_held_lock+0x2c/0x110 [ 42.665260] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.665834] ? lock_is_held_type+0x9f/0x120 [ 42.666374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.667003] ? mtree_range_walk+0x632/0x900 [ 42.667567] ? mas_walk+0x5c7/0x7c0 [ 42.668058] do_vmi_munmap+0x1f1/0x2b0 [ 42.668580] mmap_region+0x1f9/0x2660 [ 42.669070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.669591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.670327] ? __pfx_lock_acquire+0x10/0x10 [ 42.670866] ? __pfx_mmap_region+0x10/0x10 [ 42.671406] ? security_mmap_addr+0x7d/0xa0 [ 42.671945] ? get_unmapped_area+0x1f5/0x3f0 [ 42.672529] do_mmap+0x854/0xf00 [ 42.672974] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.673483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.674046] ksys_mmap_pgoff+0x3af/0x500 [ 42.674566] do_syscall_64+0x3f/0x90 [ 42.675049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.675718] RIP: 0033:0x7f89dc79ed82 [ 42.676191] 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 [ 42.678367] RSP: 002b:00007fff8631fd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.679287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89dc79ed82 [ 42.680154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89dbbd8000 [ 42.681049] RBP: 00007f89dbbd8000 R08: 0000000000000009 R09: 0000000000001000 [ 42.681911] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ac031dec0 [ 42.682787] R13: 00007fff8631fda0 R14: 00007fff8631fdd0 R15: 00007fff86320130 [ 42.683643] [ 42.683935] [ 42.684155] Allocated by task 220: [ 42.684597] kasan_save_stack+0x22/0x50 [ 42.685103] kasan_set_track+0x25/0x30 [ 42.685607] __kasan_slab_alloc+0x59/0x70 [ 42.686132] kmem_cache_alloc+0x16b/0x370 [ 42.686669] vm_area_dup+0x20/0x160 [ 42.687125] __split_vma+0x170/0x950 [ 42.687598] split_vma+0xc6/0x110 [ 42.688053] mprotect_fixup+0x8d2/0xb30 [ 42.688581] do_mprotect_pkey+0x87e/0xd40 [ 42.689121] __x64_sys_mprotect+0x78/0xc0 [ 42.689651] do_syscall_64+0x3f/0x90 [ 42.690131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.690783] [ 42.691001] Freed by task 206: [ 42.691402] kasan_save_stack+0x22/0x50 [ 42.691916] kasan_set_track+0x25/0x30 [ 42.692424] kasan_save_free_info+0x2b/0x50 [ 42.692970] __kasan_slab_free+0x10a/0x190 [ 42.693512] kmem_cache_free+0x10d/0x4d0 [ 42.694031] rcu_core+0x8c8/0x2860 [ 42.694485] __do_softirq+0x1b7/0x7d4 [ 42.694967] [ 42.695190] Last potentially related work creation: [ 42.695781] kasan_save_stack+0x22/0x50 [ 42.696302] __kasan_record_aux_stack+0x8e/0xa0 [ 42.696885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.697538] remove_vma+0x139/0x170 [ 42.697993] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.698566] do_vmi_munmap+0x1f1/0x2b0 [ 42.699061] __vm_munmap+0x138/0x3a0 [ 42.699531] __x64_sys_munmap+0x59/0x80 [ 42.700037] do_syscall_64+0x3f/0x90 [ 42.700529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.701185] [ 42.701403] The buggy address belongs to the object at ffff888019384cb0 [ 42.701403] which belongs to the cache vm_area_struct of size 168 [ 42.702902] The buggy address is located 88 bytes inside of [ 42.702902] freed 168-byte region [ffff888019384cb0, ffff888019384d58) [ 42.704330] [ 42.704549] The buggy address belongs to the physical page: [ 42.705227] page:00000000eab0c0f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19384 [ 42.706332] memcg:ffff888019385001 [ 42.706768] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.707420] page_type: 0xffffffff() [ 42.707887] raw: 0100000000000200 ffff88800879fc80 ffffea000064eb40 0000000000000004 [ 42.708833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019385001 [ 42.709751] page dumped because: kasan: bad access detected [ 42.710423] [ 42.710644] Memory state around the buggy address: [ 42.711233] ffff888019384c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.712107] ffff888019384c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.712977] >ffff888019384d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.713861] ^ [ 42.714310] ffff888019384d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.715185] ffff888019384e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.716058] ================================================================== [ 42.717188] Disabling lock debugging due to kernel taint [ 44.587553] BUG: Bad rss-counter state mm:000000009f135971 type:MM_FILEPAGES val:33 [ 44.589046] BUG: Bad rss-counter state mm:000000009f135971 type:MM_ANONPAGES val:22 [ 45.043973] BUG: Bad rss-counter state mm:0000000082788cdb type:MM_FILEPAGES val:33 [ 45.044849] BUG: Bad rss-counter state mm:0000000082788cdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49282' (ECDSA) to the list of known hosts. 2023/06/19 17:26:57 fuzzer started 2023/06/19 17:26:57 dialing manager at localhost:44161 2023/06/19 17:26:57 checking machine... 2023/06/19 17:26:57 checking revisions... [ 45.794171] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:26:57 testing simple program... [ 45.835872] cgroup: Unknown subsys name 'net' [ 45.886766] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:26:53 Registers: info registers vcpu 0 RAX=00007ffe72e42350 RBX=000055fc31afd3f0 RCX=322e322e302e3031 RDX=0000000000000008 RSI=00007ffe72e42210 RDI=000055fc31ae8740 RBP=0000000000000008 RSP=00007ffe72e42288 R8 =0000000000000000 R9 =00322e322e302e30 R10=00007ffe72e41f57 R11=0000000000000000 R12=000055fc31afd3f0 R13=00007ffe72e42350 R14=000055fc31b00480 R15=00007ffe72e42350 RIP=00007fa6bf18dd80 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa6becb1900 00000000 00000000 GS =0000 0000000000000000 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=00007fa6bf268618 CR3=000000000e0e4000 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=00000000000000ff0000000000000000 XMM02=bba5e4a9d6c199a114d62adffb423bbd XMM03=82f252917214a400322e322e302e3031 XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b53a6 RBX=0000000000000001 RCX=ffffffff8450d49f RDX=00000000000b53ab RSI=00000000000350d4 RDI=ffffffff864b19ce RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b19b0 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff81130868 RFL=00000283 [--S---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 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=00007f06b66a76c0 CR3=0000000009d3c000 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=21a905585c3d08862b4d5396b8b365f9 XMM02=ec2efd57dc4c00df000000000011e4d8 XMM03=524c0e103140cd0d000000000011e5a8 XMM04=a028127679fc5af500000000000ae988 XMM05=16bbfc4fa606b6250000000000133f68 XMM06=ffbbdb70a18c45f60000000000133140 XMM07=e042d86d42eb936e0000000000124a28 XMM08=524c0e103140cd0d000000000011e5a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000