syzkaller login: [ 38.769773] BUG: Bad rss-counter state mm:00000000e49af71b type:MM_FILEPAGES val:33 [ 38.771118] BUG: Bad rss-counter state mm:00000000e49af71b type:MM_ANONPAGES val:22 [ 38.938495] ================================================================== [ 38.939520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.940549] Read of size 8 at addr ffff888016fcaa50 by task sshd/218 [ 38.941521] [ 38.941761] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.942686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.943772] Call Trace: [ 38.944115] [ 38.944421] dump_stack_lvl+0x91/0xf0 [ 38.944946] print_report+0xcc/0x620 [ 38.945466] ? __virt_addr_valid+0x102/0x340 [ 38.946063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947409] kasan_report+0xbe/0xf0 [ 38.947934] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948627] vma_interval_tree_remove+0xc75/0xec0 [ 38.949308] vma_prepare+0xc54/0x11a0 [ 38.949846] __split_vma+0x5af/0x950 [ 38.950372] ? __pfx___split_vma+0x10/0x10 [ 38.950978] ? find_held_lock+0x2c/0x110 [ 38.951551] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.952180] ? lock_is_held_type+0x9f/0x120 [ 38.952784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.953459] ? mtree_range_walk+0x632/0x900 [ 38.954068] ? mas_walk+0x5c7/0x7c0 [ 38.954597] do_vmi_munmap+0x1f1/0x2b0 [ 38.955160] mmap_region+0x1f9/0x2660 [ 38.955694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.956254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.957042] ? __pfx_lock_acquire+0x10/0x10 [ 38.957628] ? __pfx_mmap_region+0x10/0x10 [ 38.958208] ? security_mmap_addr+0x7d/0xa0 [ 38.958811] ? get_unmapped_area+0x1f5/0x3f0 [ 38.959422] do_mmap+0x854/0xf00 [ 38.959908] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.960452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.961070] ksys_mmap_pgoff+0x3af/0x500 [ 38.961635] do_syscall_64+0x3f/0x90 [ 38.962166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962897] RIP: 0033:0x7f7163f48d82 [ 38.963404] 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 [ 38.965745] RSP: 002b:00007ffc714d3248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.966745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7163f48d82 [ 38.967685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7163382000 [ 38.968605] RBP: 00007f7163382000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969533] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4ad9c7d90 [ 38.970463] R13: 00007ffc714d3260 R14: 00007ffc714d3290 R15: 00007ffc714d35f0 [ 38.971419] [ 38.971740] [ 38.971973] Allocated by task 211: [ 38.972443] kasan_save_stack+0x22/0x50 [ 38.972997] kasan_set_track+0x25/0x30 [ 38.973538] __kasan_slab_alloc+0x59/0x70 [ 38.974118] kmem_cache_alloc+0x16b/0x370 [ 38.974684] vm_area_dup+0x20/0x160 [ 38.975195] __split_vma+0x170/0x950 [ 38.975708] split_vma+0xc6/0x110 [ 38.976190] mprotect_fixup+0x8d2/0xb30 [ 38.976743] do_mprotect_pkey+0x87e/0xd40 [ 38.977308] __x64_sys_mprotect+0x78/0xc0 [ 38.977873] do_syscall_64+0x3f/0x90 [ 38.978392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979100] [ 38.979330] Freed by task 211: [ 38.979756] kasan_save_stack+0x22/0x50 [ 38.980306] kasan_set_track+0x25/0x30 [ 38.980837] kasan_save_free_info+0x2b/0x50 [ 38.981417] __kasan_slab_free+0x10a/0x190 [ 38.981998] kmem_cache_free+0x10d/0x4d0 [ 38.982549] rcu_core+0x8c8/0x2860 [ 38.983044] __do_softirq+0x1b7/0x7d4 [ 38.983567] [ 38.983800] Last potentially related work creation: [ 38.984433] kasan_save_stack+0x22/0x50 [ 38.984979] __kasan_record_aux_stack+0x8e/0xa0 [ 38.985599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.986298] remove_vma+0x139/0x170 [ 38.986794] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.987401] do_vmi_munmap+0x1f1/0x2b0 [ 38.987930] __vm_munmap+0x138/0x3a0 [ 38.988442] __x64_sys_munmap+0x59/0x80 [ 38.988974] do_syscall_64+0x3f/0x90 [ 38.989488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990182] [ 38.990410] The buggy address belongs to the object at ffff888016fca9f8 [ 38.990410] which belongs to the cache vm_area_struct of size 168 [ 38.992013] The buggy address is located 88 bytes inside of [ 38.992013] freed 168-byte region [ffff888016fca9f8, ffff888016fcaaa0) [ 38.993531] [ 38.993765] The buggy address belongs to the physical page: [ 38.994471] page:000000002cb26d1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fca [ 38.995655] memcg:ffff88801800d301 [ 38.996115] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.996873] page_type: 0xffffffff() [ 38.997359] raw: 0100000000000200 ffff8880087a0c80 ffffea00002e6540 dead000000000007 [ 38.998356] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801800d301 [ 38.999344] page dumped because: kasan: bad access detected [ 39.000057] [ 39.000290] Memory state around the buggy address: [ 39.000913] ffff888016fca900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.001832] ffff888016fca980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.002769] >ffff888016fcaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.003673] ^ [ 39.004418] ffff888016fcaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.005351] ffff888016fcab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.006264] ================================================================== [ 39.007440] Disabling lock debugging due to kernel taint [ 41.068684] BUG: Bad rss-counter state mm:0000000095a55fee type:MM_FILEPAGES val:33 [ 41.070591] BUG: Bad rss-counter state mm:0000000095a55fee type:MM_ANONPAGES val:22 [ 41.571697] BUG: Bad rss-counter state mm:00000000d183d1fe type:MM_FILEPAGES val:33 [ 41.573482] BUG: Bad rss-counter state mm:00000000d183d1fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12243' (ECDSA) to the list of known hosts. 2023/06/21 06:29:53 fuzzer started 2023/06/21 06:29:53 dialing manager at localhost:36067 2023/06/21 06:29:54 checking machine... 2023/06/21 06:29:54 checking revisions... [ 42.316302] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:29:54 testing simple program... [ 42.354110] cgroup: Unknown subsys name 'net' [ 42.410746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:53 Registers: info registers vcpu 0 RAX=ffffffff8118ddc3 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09f01 RSI=ffff88806ce09fe0 RDI=ffff88806ce09fe0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f194f8d0900 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=00007f194ed00380 CR3=000000000d6a2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aa782b69370ba59400000000000ae988 XMM05=5d3c5f04b196a99e0000000000133418 XMM06=b4016f2aba400cde0000000000131e48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00002000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118d7fe RBX=ffffffff85d98dbc RCX=ffffffff8118d7d8 RDX=0000000000000000 RSI=ffffffff860a12ea RDI=ffffffff85d98db0 RBP=ffffffff85d98dbc RSP=ffff888008e37848 R8 =ffffffff860a12ea R9 =ffff888008e37940 R10=0000000000038001 R11=00000000000078fb R12=ffffffff85d98db8 R13=ffffffff85d98db0 R14=0000000000000008 R15=dffffc0000000000 RIP=ffffffff8112fca7 RFL=00000202 [-------] 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=00007f1550a4e618 CR3=000000000c5a4000 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=563412feff00545000000000000080fe 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