syzkaller login: [ 42.453560] BUG: Bad rss-counter state mm:00000000db5abc47 type:MM_FILEPAGES val:33 [ 42.454423] BUG: Bad rss-counter state mm:00000000db5abc47 type:MM_ANONPAGES val:22 [ 42.598590] ================================================================== [ 42.599700] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.600827] Read of size 8 at addr ffff8880145e4df0 by task sshd/225 [ 42.601753] [ 42.602147] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.603202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.604377] Call Trace: [ 42.604757] [ 42.605108] dump_stack_lvl+0x91/0xf0 [ 42.605579] print_report+0xcc/0x620 [ 42.606034] ? __virt_addr_valid+0x102/0x340 [ 42.606555] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.607127] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.607712] kasan_report+0xbe/0xf0 [ 42.608156] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.608746] vma_interval_tree_remove+0xc75/0xec0 [ 42.609330] vma_prepare+0xc54/0x11a0 [ 42.609780] __split_vma+0x5af/0x950 [ 42.610229] ? __pfx___split_vma+0x10/0x10 [ 42.610727] ? find_held_lock+0x2c/0x110 [ 42.611214] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.611818] ? lock_is_held_type+0x9f/0x120 [ 42.612519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.613338] ? mtree_range_walk+0x632/0x900 [ 42.614048] ? mas_walk+0x5c7/0x7c0 [ 42.614657] do_vmi_munmap+0x1f1/0x2b0 [ 42.615284] mmap_region+0x1f9/0x2660 [ 42.615820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.616320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.617041] ? __pfx_lock_acquire+0x10/0x10 [ 42.617554] ? __pfx_mmap_region+0x10/0x10 [ 42.618088] ? security_mmap_addr+0x7d/0xa0 [ 42.618590] ? get_unmapped_area+0x1f5/0x3f0 [ 42.619193] do_mmap+0x854/0xf00 [ 42.619662] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.620166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.620712] ksys_mmap_pgoff+0x3af/0x500 [ 42.621277] do_syscall_64+0x3f/0x90 [ 42.621731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.622348] RIP: 0033:0x7f0bde204d82 [ 42.622785] 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 [ 42.624821] RSP: 002b:00007ffd6d62f278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.625682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bde204d82 [ 42.626499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bdd63e000 [ 42.627310] RBP: 00007f0bdd63e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.628109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f9f83fec0 [ 42.628915] R13: 00007ffd6d62f290 R14: 00007ffd6d62f2c0 R15: 00007ffd6d62f620 [ 42.629735] [ 42.630017] [ 42.630223] Allocated by task 218: [ 42.630629] kasan_save_stack+0x22/0x50 [ 42.631104] kasan_set_track+0x25/0x30 [ 42.631573] __kasan_slab_alloc+0x59/0x70 [ 42.632072] kmem_cache_alloc+0x16b/0x370 [ 42.632562] vm_area_dup+0x20/0x160 [ 42.633007] __split_vma+0x170/0x950 [ 42.633456] split_vma+0xc6/0x110 [ 42.633870] mprotect_fixup+0x8d2/0xb30 [ 42.634385] do_mprotect_pkey+0x87e/0xd40 [ 42.634885] __x64_sys_mprotect+0x78/0xc0 [ 42.635402] do_syscall_64+0x3f/0x90 [ 42.635854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.636475] [ 42.636685] Freed by task 218: [ 42.637111] kasan_save_stack+0x22/0x50 [ 42.637589] kasan_set_track+0x25/0x30 [ 42.638120] kasan_save_free_info+0x2b/0x50 [ 42.638635] __kasan_slab_free+0x10a/0x190 [ 42.639180] kmem_cache_free+0x10d/0x4d0 [ 42.639666] rcu_core+0x8c8/0x2860 [ 42.640113] __do_softirq+0x1b7/0x7d4 [ 42.640565] [ 42.640770] Last potentially related work creation: [ 42.641390] kasan_save_stack+0x22/0x50 [ 42.641876] __kasan_record_aux_stack+0x8e/0xa0 [ 42.642473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.643177] remove_vma+0x139/0x170 [ 42.643622] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.644154] do_vmi_munmap+0x1f1/0x2b0 [ 42.644618] __vm_munmap+0x138/0x3a0 [ 42.645079] __x64_sys_munmap+0x59/0x80 [ 42.645548] do_syscall_64+0x3f/0x90 [ 42.645996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.646608] [ 42.646813] The buggy address belongs to the object at ffff8880145e4d98 [ 42.646813] which belongs to the cache vm_area_struct of size 168 [ 42.648214] The buggy address is located 88 bytes inside of [ 42.648214] freed 168-byte region [ffff8880145e4d98, ffff8880145e4e40) [ 42.649567] [ 42.649776] The buggy address belongs to the physical page: [ 42.650406] page:0000000063b5f40d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145e4 [ 42.651449] memcg:ffff888016901d01 [ 42.651860] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.652493] page_type: 0xffffffff() [ 42.652934] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.653833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016901d01 [ 42.654701] page dumped because: kasan: bad access detected [ 42.655329] [ 42.655533] Memory state around the buggy address: [ 42.656096] ffff8880145e4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.656932] ffff8880145e4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.657774] >ffff8880145e4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.658588] ^ [ 42.659364] ffff8880145e4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.660181] ffff8880145e4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.661015] ================================================================== [ 42.661896] Disabling lock debugging due to kernel taint [ 44.774930] BUG: Bad rss-counter state mm:00000000cf6dd352 type:MM_FILEPAGES val:33 [ 44.775935] BUG: Bad rss-counter state mm:00000000cf6dd352 type:MM_ANONPAGES val:22 [ 45.239400] BUG: Bad rss-counter state mm:0000000086e5c7c2 type:MM_FILEPAGES val:33 [ 45.240575] BUG: Bad rss-counter state mm:0000000086e5c7c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8809' (ECDSA) to the list of known hosts. 2023/06/19 16:52:09 fuzzer started 2023/06/19 16:52:09 dialing manager at localhost:44161 2023/06/19 16:52:09 checking machine... 2023/06/19 16:52:09 checking revisions... [ 45.939450] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:09 testing simple program... [ 45.990032] cgroup: Unknown subsys name 'net' [ 46.041900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e5de71 RSI=ffffffff8386aa46 RDI=ffff88800f2ef388 RBP=ffff88800f2ef420 RSP=ffff88800f2ef360 R8 =0000000000000001 R9 =ffff88800f2ef3c8 R10=0000000000038001 R11=0000000000091af6 R12=ffff88800f2ef450 R13=0000000000000000 R14=ffff888016741b40 R15=ffff88800f2ef388 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007fb5ea22f900 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=00007fb5ea7e6618 CR3=000000000ea1e000 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=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 info registers vcpu 1 RAX=ffffc90000660000 RBX=ffff88800f4d0b80 RCX=1ffff11001e9a22c RDX=1ffff11001e9a1b6 RSI=0000000000000004 RDI=ffff888009137aa8 RBP=1ffff11001226f76 RSP=ffff888009137b38 R8 =0000000000000001 R9 =ffffed1001226f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f4d0d98 R13=0000000000004ad9 R14=ffff88800f4d0000 R15=ffff88800f4d0b80 RIP=ffffffff8302dbd1 RFL=00000046 [---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 =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=00007f8118a4abb0 CR3=000000000d9cc000 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=3bbe5ccc0324c08402447f075a0e435e XMM02=2c67c8bc2e329bc3000000000011d7d8 XMM03=fb795ef6d65770560000000000124198 XMM04=6a9f8614d917eb1300000000000ae988 XMM05=e7a3b750822471340000000000133a78 XMM06=393bfc7279242f2d0000000000132c50 XMM07=e042d86d42eb936e0000000000124470 XMM08=b7a43690075c2acd000000000011d838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000